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Curriculum Vitae
Name: Stefano Scopel
Date of birth: August 1, 1967
Place of birth: Sanremo (Imperia), Italy
Citizenship: Italian
Spoken languages: Italian, English, Spanish, French
Degree in Physics: University of Torino, July 4, 1991, 110/110 magna
cum laude and honorable mention. Title of the thesis: “Dark Matter Direct
Detection”. Supervisor: Prof. A. Bottino, University of Torino.
Certificate of attendance and fellowship: Annual Course of “Advanced Studies in Nuclear and Subnuclear Physics and Astrophysics”, University of Torino, 1992.
Ph.D in Physics: Ph. D. in Physics at the University of Genoa, Italy
(1994-1996). Research field: Analysis of supersymmetric relic particles as
dark matter candidates. Title of the thesis: “Detection of Supersimmetric
Dark Matter”. Supervisors: Prof. G. Ridolfi, University of Genoa and Prof.
A. Bottino, University of Torino.
Post-Doc: Post-Doc at the University of Saragossa, Spain (march 1997august 1997) with a fellowship by the Italian foundation “Fondazione Angelo
della Riccia” (Firenze, Italy). Research fields: underground dark matter
searches and supersymmetric dark matter candidates.
Post-Doc: Post-Doc at the University of Saragossa, Spain (September
1997-august 1999) with a fellowship by the INFN (Italian National Institute
of Nuclear Physics). Research fields: underground dark matter searches,
supersymmetric dark matter, axion searches.
Post-Doc: Post-Doc at the University of Saragossa, Spain (September
1999-march 2000) with a fellowship by the European Union Commission
(European project: ERB-FMEX-CT98-0167) on low–background cryogenic
detectors, searches on dark matter and double–beta decay.
Post-Doc: Post-Doc at the University of Torino, Italy (April 2000-march
2002) with a fellowship by the University of Torino on “ Astroparticle Physics:
Study of dark matter particle candidates”. Research field: supersymmetric
dark matter, axion searches.
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Stefano Scopel
Post-Doc: Post-Doc at the University of Torino, Italy (April 2002-march
2004) with a fellowship by the University of Torino. Research field: supersymmetric dark matter, galaxy dynamics.
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Stefano Scopel
List of Publications
To the present date Stefano Scopel has published a total number of 74
research articles (41 original papers and 33 contributions in scientific proceedings). Most of them are listed in the Spires HEP Literature databases
(http://www.slac.stanford.edu/spires) where, according to the automatic online citation summary search system, they have generated 1054 citations; in
the same database 27 of his articles are classified as ”known” or ”well known”
papers.
1. A. Bottino, F. Donato, N. Fornengo and S. Scopel, “Indirect signals
from light neutralinos in supersymmetric models without gaugino mass
unification”, accepted for publicaton on Phys. Rev. D, [arXiv:hepph/0401186].
2. A. Bottino, F. Donato, N. Fornengo and S. Scopel, “Light neutralinos and WIMP direct searches”, Phys. Rev. D 69, 037302 (2004) ,
[arXiv:hep-ph/0307303].
3. A. Bottino, F. Donato, N. Fornengo and S. Scopel, “Lower bound on
the neutralino mass from new data on CMB and implications for relic
neutralinos”, Phys. Rev. D 68, 043506 (2003) [arXiv:hep-ph/0304080].
4. C. Arnaboldi, F.T. Avignone, III, J. Beeman, M. Barucci, M. Balata, C. Brofferio, C. Bucci, S. Cebrian, R.J. Creswick, S. Capelli,
L. Carbone, O. Cremonesi, A. de Ward, E. Fiorini, H.A. Farach,
G. Frossati, A. Giuliani, P. Gorla, E.E. Haller, I.G. Irastorza, R.J. McDonald, A. Morales, E.B. Norman, A. Nucciotti, M. Pedretti, C. Pobes,
V. Palmieri, M. Pavan, G. Pessina, S. Pirro, E. Previtali, C. Rosenfeld, S. Scopel, A.R. Smith, M. Sisti, G. Ventura, M. Vanzini [CUORE
Collaboration], “Physics potential and prospects for the CUORICINO
and CUORE experiments”, Astrop. Phys. 20, 91 (2003), [arXiv:hepex/0302021].
5. N. Fornengo and S. Scopel, “Temporal distortion of annual modulation
at low recoil energies”, Phys. Lett. B 576, 189 (2003), [arXiv:hepph/0301132].
6. A. Bottino, N. Fornengo and S. Scopel, “Light relic neutralinos”, Phys.
Rev. D 67, 063519 (2003) [arXiv:hep-ph/0212379].
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7. N. Fornengo, A. Riotto and S. Scopel, “Supersymmetric dark matter and the reheating temperature of the universe”, Phys. Rev. D 67,
023514 (2003) [arXiv:hep-ph/0208072].
8. A. Bottino, G. Fiorentini, N. Fornengo, B. Ricci, S. Scopel and
F. L. Villante, “Does solar physics provide constraints to weakly interacting massive particles?”, Phys. Rev. D 66, 053005 (2002) [arXiv:hepph/0206211].
9. A. Bottino, F. Donato, N. Fornengo and S. Scopel, “Size of the
neutralino–nucleon cross–section in the light of a new determination
of the pion–nucleon sigma term”, Astropart. Phys. 18, 205 (2002)
[arXiv:hep-ph/0111229].
10. P. Belli, R. Cerulli, N. Fornengo and S. Scopel, “Effect of the galactic
halo modeling on the DAMA/NaI annual modulation result: An extended analysis of the data for WIMPs with a purely spin-independent
coupling”, Phys. Rev. D 66, 043503 (2002) [arXiv:hep-ph/0203242].
11. A. Morales, F. T. Avignone III, R. L. Brodzinski, S. Cebrian,
E. Garcia, D. Gonzalez, I. G. Irastorza, H. S. Miley, J. Morales,
A. Ortiz de Solorzano, J. Puimedon, J. H. Reeves, M. L. Sarsa,
S. Scopel, J. A. Villar [COSME Collaboration], “Particle dark matter and solar axion searches with a small germanium detector at the
Canfranc underground laboratory”, Astropart. Phys. 16, 325 (2002)
[arXiv:hep-ex/0101037].
12. R. Bernabei, P. Belli, R. Cerulli, F. Montecchia, F. Nozzoli, A.
Incicchitti, D. Prosperi, C. J. Dai, H. L. He, H. H. Kuang, J. M.
Ma, S. Scopel, “Search For Solar Axions By Primakoff Effect In Nai
Crystals”, Phys. Lett. B 515, 6 (2001).
13. A. Bottino, N. Fornengo and S. Scopel, “Implications of a possible 115GeV supersymmetric Higgs boson on detection and cosmological abundance of relic neutralinos”, Nucl. Phys. B 608, 461 (2001) [arXiv:hepph/0012377].
14. A. Bottino, F. Donato, N. Fornengo and S. Scopel, “Probing the supersymmetric parameter space by WIMP direct detection”, Phys. Rev.
D 63, 125003 (2001) [arXiv:hep-ph/0010203].
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15. S. Cebrian, N. Coron, G. Dambier, E. Garcia, D. Gonzalez, I. G. Irastorza, J. Leblanc, P. de Marcillac, A. Morales, J. Morales, A. Ortiz de
Solorzano, A. Peruzzi, J. Puimedon, M. L. Sarsa, S. Scopel, J. A. Villar,
“First results of the ROSEBUD dark matter experiment”, Astropart.
Phys. 15, 79 (2001) [arXiv:astro-ph/0004292].
16. A. Morales, C. E. Aalseth, F. T. Avignone III, R. L. Brodzinski,
S. Cebrian, E. Garcia, D. Gonzalez, W. K. Hensley, I. G. Irastorza,
I. V. Kirpichnikov, A. A. Klimenko, H. S. Miley, J. Morales, A.
Ortiz de Solorzano, S. B. Osetrov, V. S. Pogosov, J. Puimedon, J. H.
Reeves, M. L. Sarsa, S. Scopel, A. A. Smolnikov, A. G. Tamanian,
A. A. Vasenko, S. I. Vasilev, J. A. Villar [IGEX Collaboration], “New
constraints on WIMPs from the Canfranc IGEX dark matter search”,
Phys. Lett. B 489, 268 (2000) [arXiv:hep-ex/0002053].
17. A. Bottino, F. Donato, N. Fornengo and S. Scopel, “Further investigation of a relic neutralino as a possible origin of an annualmodulation effect in WIMP direct search”, Phys. Rev. D 62, 056006
(2000) [arXiv:hep-ph/0001309].
18. S. Cebrian, N. Coron, G. Dambier, E. Garcia, D. Gonzalez, I. G.
Irastorza, J. Leblanc, P. de Marcillac, A. Morales, J. Morales,
A. Ortiz de Solorzano, A. Peruzzi, J. Puimedon, M. L. Sarsa,
S. Scopel, J. A. Villar, “Status Of The Rosebud Dark Matter Search
Experiment”, Nucl. Instrum. Meth. A 444, 315 (2000).
19. C. E. Aalseth, F. T. Avignone, R. L. Brodzinski, W. K. Hensley,
H. S. Miley, J. H. Reeves, I. V. Kirpichnikov, A. S. Starostin, A. A.
Vasenko, A. A. Klimenko, S. B. Osetrov, A. A. Smolnikov, S. I.
Vasilev, V. S. Pogosov, A. G. Tamanian, S. Cebrian, D. Gonzales, E. Garcia, I. G. Irastorza, A. Morales, J. Morales, A. Ortiz
de Solorzano, J. Puimedon, M. L. Sarsa, S. Scopel, S. I. Vasilev,
J. A. Villar, “Recent Results Of The Igex Ge-76 Double-Beta Decay
Experiment”, Phys. Atom. Nucl. 63, 1225 (2000) [Yad. Fiz. 63, 1299
(2000)].
20. C. E. Aalseth, F. T. Avignone, R. L. Brodzinski, W. K. Hensley,
H. S. Miley, J. H. Reeves, S. Cebrian, D. Gonzales, E. Garcia,
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I. G. Irastorza, A. Morales, J. Morales, A. Ortiz de Solorzano, J.
Puimedon, M. L. Sarsa, S. Scopel, J. A. Villar, I. V. Kirpichnikov,
A. S. Starostin, A. A. Vasenko, A. A. Klimenko, S. B. Osetrov,
A. A. Smolnikov, S. I. Vasilev, “New Results Of The Wimp Search
With The First Igex Ge Detectors”, Phys. Atom. Nucl. 63, 1268 (2000)
[Yad. Fiz. 63, 1341 (2000)].
21. S. Cebrian, E. Garcia, D. Gonzalez, I. G. Irastorza, A. Morales,
J. Morales, A. Ortiz, A. Peruzzi, J. Puimedon, M. L. Sarsa, S.
Scopel, J. A. Villar, “Cold Dark Matter Searches At The Canfranc
Underground Laboratory” New J. Phys. 2, 13 (2000).
22. S. Cebrian, E. Garcia, D. Gonzalez, I. G. Irastorza, A. Morales,
J. Morales, A. Ortiz de Solorzano, A. Peruzzi, J. Puimedon,
M. L. Sarsa, S. Scopel, J. A. ‘Villar, “Sensitivity plots for WIMP
direct detection using the annual modulation signature”, Astropart.
Phys. 14, 339 (2001) [arXiv:hep-ph/9912394].
23. A. Bottino, F. Donato, N. Fornengo and S. Scopel, “Implications
for relic neutralinos of the theoretical uncertainties in the neutralino
nucleon cross-section”, Astropart. Phys. 13, 215 (2000) [arXiv:hepph/9909228].
24. P. Belli, R. Bernabei, A. Bottino, F. Donato, N. Fornengo, D. Prosperi
and S. Scopel, “Extending the DAMA annual-modulation region by
inclusion of the uncertainties in astrophysical velocities”, Phys. Rev. D
61, 023512 (2000) [arXiv:hep-ph/9903501].
25. S. Cebrian, N. Coron, G. Dambier, E. Garcia, D. Gonzalez, I. G.
Irastorza, J. Leblanc, P. de Marcillac, A. Morales, J. Morales,
A. Ortiz de Solorzano, J. Puimedon, A. Salinas, M. L. Sarsa, S.
Scopel, J. A. Villar, “Performances And Prospects Of The ’Rosebud’
Dark Matter Search Experiment”, Astropart. Phys. 10, 361 (1999).
26. S. Cebrian, E. Garcia, D. Gonzalez, I. G. Irastorza, A. Morales,
J. Morales, A. Ortiz de Solorzano, J. Puimedon, A. Salinas, M. L.
Sarsa, S. Scopel, J. A. Villar, “Prospects of solar axion searches
with crystal detectors”, Astropart. Phys. 10, 397 (1999) [arXiv:astroph/9811359].
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27. A. Bottino, F. Donato, N. Fornengo and S. Scopel, “Combining the
data of annual modulation effect in WIMP direct detection with measurements of WIMP indirect searches”, Astropart. Phys. 10, 203 (1999)
[arXiv:hep-ph/9809239].
28. A. Bottino, F. Donato, N. Fornengo and S. Scopel, “Neutralino properties in the light of a further indication of an annual modulation effect
in WIMP direct search”, Phys. Rev. D 59, 095003 (1999) [arXiv:hepph/9808456].
29. A. Bottino, F. Donato, N. Fornengo and S. Scopel, “Compatibility of
the new DAMA/NaI data on an annual modulation effect in WIMP
direct search with a relic neutralino in supergravity schemes”, Phys.
Rev. D 59, 095004 (1999) [arXiv:hep-ph/9808459].
30. F. Donato, N. Fornengo and S. Scopel, “Effects of galactic dark halo
rotation on WIMP direct detection”, Astropart. Phys. 9, 247 (1998)
[arXiv:hep-ph/9803295].
31. K. Zioutas, C. E. Aalseth, D. Abriola, F. T. Avignone III, R. L.
Brodzinski, J. I. Collar, R. Creswick, D. E. Di Gregorio, H. Farach,
A. O. Gattone, C. K. Guerard, F. Hasenbalg, M. Hasinoff, H.
Huck, A. Liolios, H. S. Miley, A. Morales, J. Morales, D. Nikas,
S. Nussinov, A. Ortiz, E. Savvidis, S. Scopel, P. Sievers, J. A.
Villar, L. Walckiers, “A decommissioned LHC model magnet as an
axion telescope”, Nucl. Instrum. Meth. A 425, 482 (1999) [arXiv:astroph/9801176].
32. A. Bottino, F. Donato, N. Fornengo and S. Scopel, “Pinning down
neutralino properties from a possible modulation signal in WIMP direct
search”, Phys. Lett. B 423, 109 (1998) [arXiv:hep-ph/9709292].
33. A. Bottino, F. Donato, G. Mignola, S. Scopel, P. Belli and A. Incicchitti, “Exploring the supersymmetric parameter space by direct search
for WIMPs”, Phys. Lett. B 402, 113 (1997) [arXiv:hep-ph/9612451].
34. A. Bottino, N. Fornengo, G. Mignola, M. Olechowski and S. Scopel,
“Perspectives for detection of a higgsino-like relic neutralino”, Astropart. Phys. 6, 395 (1997) [arXiv:astro-ph/9611030].
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35. A. Bottino, G. Mignola, M. Olechowski and S. Scopel, “Relic neutralinos in a best-fitted MSSM”, Phys. Lett. B 380, 308 (1996) [arXiv:hepph/9604379].
36. V. Berezinsky, A. Bottino, J. R. Ellis, N. Fornengo, G. Mignola and
S. Scopel, “Searching for relic neutralinos using neutrino telescopes”,
Astropart. Phys. 5, 333 (1996) [arXiv:hep-ph/9603342].
37. V. Berezinsky, A. Bottino, J. R. Ellis, N. Fornengo, G. Mignola
and S. Scopel, “Neutralino dark matter in supersymmetric models
with nonuniversal scalar mass terms”, Astropart. Phys. 5, 1 (1996)
[arXiv:hep-ph/9508249].
38. A. Bottino, V. de Alfaro, N. Fornengo, S. Mignola and S. Scopel, “On
the neutralino as dark matter candidate. 2. Direct detection”, Astropart. Phys. 2, 77 (1994) [arXiv:hep-ph/9309219].
39. A. Bottino, V. de Alfaro, N. Fornengo, G. Mignola, S. Scopel,
C. Bacci P. Belli, R. Bernabei, E. Gaillard, G. Gerbier, Haohuai Kuang, A. Incicchitti, J. Mallet, R. Marcovaldi, L. Mosca, D.
Prosperi, C. Tao, Yi-gang Xie, “Search for neutralino dark matter
with NaI detectors”, Phys. Lett. B 295, 330 (1992).
40. A. Bottino, V. de Alfaro, N. Fornengo, G. Mignola and S. Scopel, “A
New investigation about neutralino dark matter: Relic density and
detection rates”, Astropart. Phys. 1, 61 (1992).
41. A. Bottino, V. de Alfaro, N. Fornengo, A. Morales, J. Puimedon and
S. Scopel, “Direct versus indirect searches for neutralino dark matter”,
Mod. Phys. Lett. A 7, 733 (1992).
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List of conference proceedings
1. S. Scopel, “Light Relic Neutralinos”, Proceedings of the Fourth Tegernsee International Conference on Particle Physics Beyond the Standard Model (BEYOND 2003), Castle Ringberg, Tegernsee, Germany,
June 9–14 2003, Edited by H. V. Klapdor-Kleingrothaus, Springer.
2. S. Scopel, “Light Relic Neutralinos”, International Workshop on Astroparticle and High Energy Physics (AHEP-2003), Valencia, Spain,
October 14 - 18, published on JHEP, http://jhep.sissa.it/, Edited by
M. Hirsch, M. Maltoni, S. Pastor and J.W.F. Valle.
3. S. Scopel, “Neutralino as a Dark Matter Candidate”, 4th International
Workshop on the Identification of Dark Matter (IDM2002), York, England, 2 - 6 Sep 2002, Edited by Neil J. C. Spooner and V. Kudryavtsev,
World Scientific.
4. A. Bottino, F. Donato, N. Fornengo and S. Scopel, “Non-Baryonic Dark
Matter”, 30th International Meeting On Fundamental Physics (IMFP
2002), Jaca, Spain, 28 Jan - 1 Feb 2002, Nucl. Phys. Proc. Suppl. 114
(2003) 27.
5. S. Scopel, “Relic Neutralinos”, 7th International Workshop on Topics
in Astroparticle and Underground Physics (TAUP 2001), Assergi, Italy,
8-12 Sep 2001, Nucl. Phys. Proc. Suppl. 110, 76 (2002).
6. A. Bottino, F. Donato, N. Fornengo and S. Scopel, “Supersymmetric
Dark Matter”, First International Conference on ”Particle and Fundamental Physics in Space (SPACE PART)”, La Biodola, Isola d’Elba
(Italy), May 2002, Nucl. Phys. Proc. Suppl. 113, 50 (2002) [arXiv:hepph/0208273].
7. A. Bottino, N. Fornengo and S. Scopel, “Relic Neutralinos”, COSMO01, Rovaniemi, Finland, August 29 - September 4, 2001, arXiv:hepph/0112238.
Stefano Scopel
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8. A. Bottino, F. Donato, N. Fornengo and S. Scopel, “Particle candidates
for dark matter: a case for (dominant or subdominant) relic neutralinos”, ”Results and Perspectives in Particle Physics”, Les Rencontres
de Physique de la Vallee d’Aoste, La Thuile, March 2001, arXiv:hepph/0105233.
9. I. G. Irastorza et al. [COSME-IGEX Joint Collaboration], “Recent results from the Canfranc dark matter search with germanium detectors”,
Third International Workshop on the Identification of Dark Matter,
York, England, 18-22 September 2000, arXiv:hep-ph/0011318.
10. S. Cebrian et al., “First Results Of The Igex Dark Matter Experiment
At The Canfranc Underground Laboratory”, EURESCO Conference
on Frontiers in Particle Astrophysics and Cosmology, San Feliu de
Guixols, Spain, 30 Sep - 5 Oct 2000, Nucl. Phys. Proc. Suppl. 95,
229 (2001).
11. S. Scopel, “Neutralino dark matter and direct WIMP searches,” 3rd International Workshop on the Identification of Dark Matter (IDM2000),
York, England, 18-22 Sep 2000.
12. S. Cebrian et al., “Status report on the ROSEBUD dark matter experiment,” 3rd International Workshop on the Identification of Dark
Matter (IDM2000), York, England, 18-22 Sep 2000.
13. S. Scopel, “WIMP direct searches and relic neutralinos”, Conference on
Cosmology and Particle Physics (CAPP 2000), Verbier, Switzerland,
17-28 Jul 2000.
14. A. Alessandrello et al., “The First Step Toward Cuore: Cuoricino, A
Thermal Detector Array To Search For Rare Events”, 6th International
Workshop on Topics in Astroparticle and Underground Physics (TAUP
99), Paris, France, 6-10 Sep 1999, Nucl. Phys. Proc. Suppl. 87, 78
(2000).
15. D. Gonzalez et al., “Current Igex Results For Neutrinoless Double-Beta
Decay Of Ge-76”, 6th International Workshop on Topics in Astroparticle and Underground Physics (TAUP 99), Paris, France, 6-10 Sep
1999, Nucl. Phys. Proc. Suppl. 87, 278 (2000).
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16. S. Cebrian et al., “Status Of The Rosebud Dark Matter Experiment
In 1999”, 6th International Workshop on Topics in Astroparticle and
Underground Physics (TAUP 99), Paris, France, 6-10 Sep 1999, Nucl.
Phys. Proc. Suppl. 87, 500 (2000).
17. I. G. Irastorza et al., “Prospects for solar axions searches with crystals via Bragg scattering”, 6th International Workshop on Topics in
Astroparticle and Underground Physics (TAUP 99), Paris, France, 610 Sep 1999, Nucl. Phys. Proc. Suppl. 87, 102 (2000) [arXiv:astroph/9912491].
18. S. Scopel et al., “Sensitivity plots for WIMP modulation searches”, 6th
International Workshop on Topics in Astroparticle and Underground
Physics (TAUP 99), Paris, France, 6-10 Sep 1999, Nucl. Phys. Proc.
Suppl. 87, 111 (2000) [arXiv:hep-ph/9912522].
19. C. Bobin et al., “Towards Measurements Of Recoils Below 4-Kev With
The Rosebud Experiment”, 5th International Workshop on Topics in
Astroparticle and Underground Physics (TAUP 97), Gran Sasso, Italy,
7-11 Sep 1997, Nucl. Phys. Proc. Suppl. 70, 90 (1999).
20. I. G. Irastorza et al., “Prospects for solar axions searches with crystals
via Bragg scattering”, 26th International Winter Meeting on Fundamental Physics, Isla de la Toxa, Galicia, Spain, 1-5 Jun 1998.
21. S. Scopel et al., “Theoretical expectations and experimental prospects
for solar axions searches with crystal detectors”, 2nd International
Workshop on the Identification of Dark Matter (IDM98), Buxton, England, 7-11 September 1998, arXiv:astro-ph/9810308.
22. A. Alessandrello et al., “CUORE: A cryogenic underground observatory
for rare events,” 2nd International Workshop on the Identification of
Dark Matter (IDM 98), Buxton, England, 7-11 Sep 1998.
23. I. G. Irastorza et al., “Prospects for solar axions searches with crystals
via Bragg scattering,” 26th International Winter Meeting on Fundamental Physics, Illa da Toxa, Galicia, Spain, 1-5 Jun 1998.
Stefano Scopel
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24. C. E. Aalseth et al., “Search for axions or axion-like particles,” Conference on Advances in Nuclear Physics and Related Areas, Thessaloniki,
Greece, 8-12 Jul 1997.
25. S. Scopel, “Neutralino Properties From A Possible Modulation Signal
In Wimp Direct Search,” COSMO97: 1st International Workshop on
Particle Physics and the Early Universe, Ambleside, England, 15-19
Sep 1997.
26. S. Scopel, “Theoretical Expectations for Detection of Neutralino Dark
Matter”, Dark Matter in Astro– and Particle Physics (DARK’96), Heidelberg, Germany, 16–20 september 1996.
27. A. Bottino, F. Donato, N. Fornengo and S. Scopel, “Theoretical expectations for direct detection of susy dark matter”, 2nd Workshop on the
Dark Side of the Universe, Rome, Italy, 13–14 september 1995.
28. A. Bottino, C. Favero, N. Fornengo, G. Mignola and S. Scopel, “Relic
neutralinos,” International Workshop on Neutrinoless Double Beta Decay and Related Topics, Trento, Italy, 24 Apr - 5 May 1995.
29. G. Mignola, V. Berezinsky, A. Bottino, J. R. Ellis, N. Fornengo and
S. Scopel, “Signals From Relic Neutralinos”, 4th International Workshop on Theoretical and Phenomenological Aspects of Underground
Physics (TAUP 95), Toledo, Spain, 17-21 Sep 1995, Nucl. Phys. Proc.
Suppl. 48, 50 (1996).
30. A. Bottino, N. Fornengo, G. Mignola and S. Scopel, “Searching for
relic neutralinos”, ”Physics from Planck Scale to Electroweak Scale”,
Warsaw, September 1994, arXiv:hep-ph/9412290.
31. A. Bottino, N. Fornengo, G. Mignola and S. Scopel, “Neutralinos as
dark matter candidates”, 6th International Workshop on: ”Neutrino
Telescopes”, Venice 1994, arXiv:hep-ph/9405417.
32. A. Bottino, V. de Alfaro, N. Fornengo, G. Mignola and S. Scopel,
“Neutralino As A Candidate For Cold Dark Matter”, 15th International Conference on Neutrino Physics and Astrophysics (Neutrino
’92), Granada, Spain, 7-12 Jun 1992, Nucl. Phys. Proc. Suppl. 31,
359 (1993).
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33. A. Bottino, V. de Alfaro, N. Fornengo, A. Morales, J. Puimedon and
S. Scopel, “Analysis Of Direct Searches For Neutralino Dark Matter”,
2nd International Workshop on Theoretical and Phenomenological Aspects of Underground Physics (TAUP 91), Toledo, Spain, 9-13 Sep
1991, Nucl. Phys. Proc. Suppl. 28A, 314 (1992).
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Schools and conferences
1. “The Dark Side of The Universe”, Rome, Italy, 23–25 june 1993.
2. “XXIXth Rencontre de Moriond - Particle Astrophysics, Atomic
Physics and Gravitation, Villar sur Ollon, Switzerland, 22–29 january
1994.
3. “IV National Seminar on Theoretical Physics”, Parma, Italy, 5–16
september 1994.
4. “Workshop on Cosmology and Particle Physics”, Warsaw, Poland, 19–
22 april 1995.
5. “TAN–Network summer school”, Vigso, Denmark, 14–17 august 1995.
6. “4th International Workshop on Theoretical and Phenomenological
Aspects of Underground Physics (TAUP 95)”, Toledo, Spain, 17–21
september 1995.
7. “2nd Workshop on The Dark side of the Universe: experimental efforts
and theoretical framework”, Rome, November 13–14, 1995.
8. “Dark Matter in Astro– and Particle Physics (DARK’96)”, Heidelberg,
Germany, 16–20 september 1996.
9. “COSMO97: 1st International Workshop on Particle Physics and the
Early Universe”, Ambleside, England, 15–19 september 1997.
10. “2nd International Workshop on the Identification of Dark Matter
(IDM98), Buxton, England”, 7–11 september 1998.
11. “26th International Winter Meeting on Fundamental Physics”, Isla de
la Toxa, Galicia, Spain, 1–5 june 1998.
12. “6th International Workshop on Topics in Astroparticle and Underground Physics (TAUP 99)”, Paris, France, 6–10 september 1999.
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13. “Conference on Cosmology and Particle Physics (CAPP 2000)”, Verbier, Switzerland, 17–28 july 2000.
14. “Gran Sasso Summer Institute on Dark Matter and Supersymmetry”,
Assergi, Italy, july 8–21 2000.
15. “Third International Workshop on the Identification of Dark Matter”,
York, England, 18–22 september 2000.
16. ”Dark Matters in Torino”, Villa Gualino, Torino, Italy, 21 february
2001.
17. “9th International Conference on Supersymmetry and Unification of
Fundamental Interactions (SUSY’01)”, Dubna, Russia, 11–17 june
2001.
18. “XIII eme rencontres de Blois - Frontiers of The Universe”, Blois,
France, 17–23 june 2001.
19. “7th International Workshop on Topics in Astroparticle and Underground Physics (TAUP 2001)”, Assergi, Italy, 8–12 september 2001.
20. “8th Summer Institute at Gran Sasso National Laboratory on New
Dimensions in Astroparticle Physics”, Assergi, Italy, 7–19 july 2002.
21. “4th International Workshop on the Identification of Dark Matter
(IDM2002)”, York, England, 2–6 september 2002.
22. “Fourth International Conference on Physics Beyond the Standard
Model, (BEYOND THE DESERT ’03)”, Castle Ringberg, Tegernsee,
Germany, 9-14 June 2003.
23. “Thinking, Observing and Mining the Universe”, Sorrento (Italy), 2227 September 2003.
24. “International Workshop on Astroparticle and High Energy Physics
(AHEP-2003)”, Valencia, Spain, 14–18 October 2003.
25. ”6th UCLA Symposium on Sources and Detection of Dark Matter and
Dark Energy in the Universe”, Marina del Rey, USA, 18–20 february
2004.
Stefano Scopel
17
26. “3rd KAIST-KIAS Joint Workshop on Particle Physics and Cosmology”, Daejeon, South Korea, 7–11 June 2004.
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Stefano Scopel
Talks presented at international conferences and lectures
1. “Neutralino direct detection”, TAN–Network summer school, Vigso,
Denmark, 14–17 august 1995.
2. “Theoretical expectations for direct detection of susy dark matter”,
2nd Workshop on the Dark Side of the Universe, Rome, Italy, 13–14
september 1995.
3. “Direct and indirect detection of relic neutralinos’, The Dark side of
the Universe: experimental efforts and theoretical framework”, Rome,
13–14 november 1995.
4. “Theoretical expectations and experimental prospects for solar axions
searches with crystal detectors”, Dark Matter in Astro– and Particle
Physics (DARK’96), Heidelberg, Germany, 16–20 september 1996.
5. “Neutralino Properties From A Possible Modulation Signal In Wimp
Direct Search”, COSMO97: 1st International Workshop on Particle
Physics and the Early Universe, Ambleside, England, 15-19 september
1997.
6. “Theoretical expectations and experimental prospects for solar axions
searches with crystal detectors”, 2nd International Workshop on the
Identification of Dark Matter (IDM98), Buxton, England, 7-11 september 1998.
7. “Sensitivity plots for WIMP modulation searches”, 6th International
Workshop on Topics in Astroparticle and Underground Physics (TAUP
99), Paris, France, 6-10 september 1999.
8. “Searching for Relic Netralinos”, seminar at the University of Valencia,
Spain, 20 january 2000.
9. “WIMP direct searches and relic neutralinos,” Conference on Cosmology and Particle Physics (CAPP 2000), Verbier, Switzerland, 17-28
july 2000.
Stefano Scopel
19
10. “Constraints on SUSY Dark Matter from WIMP indirect searches” ,
Gran Sasso Summer Institute on ”Dark Matter and Supersymmetry”,
july 8-21 2000.
11. “Neutralino dark matter and direct WIMP searches”, 3rd International
Workshop on the Identification of Dark Matter (IDM2000), York, England, 18-22 september 2000.
12. ”Particle Dark Matter: Indirect Detection”, Dark Matters in Torino,
Villa Gualino, Torino, 21 february 2001.
13. “Neutralino Dark Matter”, 9th International Conference on Supersymmetry and Unification of Fundamental Interactions (SUSY’01), Dubna,
Russia, 11–17 june 2001.
14. “Particle Candidates for Dark Matter”, XIII eme rencontres de Blois Frontiers of The Universe, Blois, France, 17–23 june 2001.
15. “Supersymmetric Relics”, 7th International Workshop on Topics in Astroparticle and Underground Physics (TAUP 2001), Assergi, Italy, 8-12
september 2001.
16. “WIMPS in our Galaxy”, 8th Summer Institute at Gran Sasso National
Laboratory on New Dimensions in Astroparticle Physics, Assergi, Italy,
7–19 july 2002.
17. “Neutralino as a Dark Matter Candidate”, 4th International Workshop
on the Identification of Dark Matter (IDM2002), York, England, 2–6
september 2002.
18. “”Light Relic Neutralinos”, Fourth International Conference on Physics
Beyond the Standard Model, (BEYOND THE DESERT ’03)”, Castle
Ringberg, Tegernsee, Germany, 9-14 June 2003.
19. ”Dark matter and supersymmetry”, “Thinking, Observing and Mining
the Universe”, Sorrento (Italy), 22-27 September 2003.
20. “Light Relic Neutralinos”, “International Workshop on Astroparticle
and High Energy Physics (AHEP-2003)”, Valencia, Spain, 14–18 October 2003.
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Stefano Scopel
21. “Direct and Indirect Search of Light Relic Neutralinos”, ”6th UCLA
Symposium on Sources and Detection of Dark Matter and Dark Energy
in the Universe”, Marina del Rey, USA, 18–20 february 2004.
22. “Supersymmetric Dark Matter”, “3rd KAIST-KIAS Joint Workshop
on Particle Physics and Cosmology”, Daejeon, South Korea, 7–11 June
2004.
21
Stefano Scopel
Subjects of Research
I started my research activity in Torino in 1991, under the tutoring of
prof. A. Bottino and in collaboration with the other members of his research
group, working on the calculation of relic abundance and direct and indirect
detection rates of particle dark matter.
During 1992 I attended the Annual Course of “Advanced Studies in Nuclear and Subnuclear Physics and Astrophysics” at the University of Torino.
After one year of military draft, in 1994 I started a Ph.D. program at
the University of Genoa that ended at the beginning of 1997, under the joint
tutoring of Prof. G. Ridolfi and prof. A. Bottino. During my stay in Genoa
I concentrated on Supersymmetric model building, developing programs for
the calculation of the supersymmetric particle spectrum and neutralino detection signals in various theoretical schemes like Supergravity–inspired models
and more phenomenological ones.
Afterwords I continued my research activity from the end of 1997 to the
beginning of 2000 at the Laboratory of Nuclear Physics of the University of
Saragossa (Spain) under the supervision of Prof. A. Morales. In this period
I continued my theoretical activity on WIMP direct detection, while at the
same time I worked also on axion phenomenology and worked directly in the
experimental activity of the underground laboratory of Canfranc, maintained
by the University of Saragossa (taking part to data analysis and the performance of Montecarlo simulations). At the same time I continued my collaboration on supersymmetric dark matter phenomenology with the Torino
Group of prof. Bottino.
After my return to Torino in the spring of 2000 I have continued my
activity on dark matter detection, neutralino phenomenology and galaxy
dynamics.
My main research activity can be summarized as follows:
• Neutralino relic abundance. I have worked in the calculation of the
present–day dark matter density. This includes the evaluation of the
neutralino annihilation cross section, taking into account all the possible kinematically final states, and the calculation of its thermal average in the early Universe, including resonance and thresholds effects. I
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have also worked in the field of non–standard cosmological scenarios,
like “low–reheating temperature” models.
• Neutralino direct detection. Neutralino and WIMP direct detection
consists in the measurements of the recoil energy deposited in low–
background underground detectors by dark matter particles scattering
elastically off target nuclei. Many experimental direct searches are under way, one of which, the DAMA experiment, has detected an annual
modulation feature in the data which, as proven for the first time in a
series of publications by the Torino group and myself, can be compatible to a neutralino signal. The calculation of expected signal includes
the evaluation of the neutralino nucleus elastic cross section (related
aspects are susy modeling, nuclear form factors, hadronic matrix elements and energy quenching factors) and a convolution on the WIMP
velocity distribution in the Galaxy (see related item).
• Neutralino indirect detection: neutrino fluxes from the Earth and the
Sun. The neutralino annihilation rate is increased whenever their density is is enhanced. The density build-up produced by gravitational
WIMP capture in celestial bodies like the Earth or the Sun is expected
to lead to a flux of high energy neutrinos, the only final states which
are not stopped inside. These neutrinos are in principle measurable by
Cerenkov underground detectors which can reveal the up-going muons
produced by the neutrino conversion in the rock underneath the laboratory. Evaluation of these signals includes a calculation of the capture
rate of neutralinos in the celestial body (convoluted over their velocity
distribution), calculation of neutralino annihilation cross section and of
the balance between capture and annihilation; calculation of the neutrino contribution from all final states and of neutrino conversion into
muons.
• Dark Dark matter and solar physics. I have studied the possible links
between the issue of WIMP capture in the Sun and the constraints
which can be derived from solar physics, showing in particular that
no constraints can be derived at present from helioseismology and 8 B
neutrinos for WIMPs with mass above 30 GeV.
• Axion phenomenology. Axions may be detected through their coupling
Stefano Scopel
23
with two photons. This coupling leads to the conversion of axions into
photons when they cross a magnetic field. The inverse process, i.e. the
conversion of photons into axions in an electro–magnetic background,
is expected to take place in the interior of stars, leading so to an alternative mechanism to their energy emission that can have dramatic
effects on the star lifetime and luminosity. Axions produced in the
Sun with this mechanism and compatible to the latest, strongest helio–
seismologic limits can in principle be detected by making use of crystal
detectors of the same type as those used in direct WIMP searches and
double–beta decay. Axions can pass in the proximity of the atomic
nuclei of the crystal where the intense electric field can trigger their
conversion into photons. In the process detectable x–rays of a few keV
are generated in the crystal. Depending on the direction of the incoming axion flux with respect to the planes of the crystal lattice, a
coherent effect can be produced when the Bragg condition is fulfilled,
leading so to a strong enhancement of the signal. A correlation of the
expected count–rate with the position of the Sun in the sky is a distinctive signature of the axion which can be used, at the least, to improve
the signal/background ratio.
In particular, I have worked in the analytical calculation of expected
rates for this process and developed a code used both for data analysis
and phenomenological studies, taking part to the data analysis of two
experiments, COSME and DAMA. The analysis of the data of DAMA
lead to the publication of the most stringent laboratory limit on the
axion–photon coupling in the highest range of the allowed axion mass.
• Dark halo velocity distribution. All expected signals for WIMP searches
strongly depend on the velocity distribution function of WIMPs and
their density in the halo. The isothermal sphere is the usual assumption, but many departures from this simplifying model are possible
(including effects due to different density profiles, anisotropy of the velocity dispersion tensor, flatness, triaxiality or corotation of the halo)
which may lead to significant changes of predictions. In particular I
worked in a comprehensive study where the effect of the uncertainty
of the velocity distribution function is included in the analysis of the
DAMA annual modulation data.
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Stefano Scopel
• Supersymmetry model–building. Since the more general pattern of supersymmetry breaking may be parametrized in term of more then 100
parameters, neutralino phenomenology is usually studied by adopting
different scenarios. I studied in detail and developed computer programs to calculate some of these scenarios. The more constrained
one is the Supergravity–inspired (SUGRA) model, where particular
boundary conditions are adopted for soft breaking terms (i.e. the dimensional parameters of the susy–breaking lagrangian that do not introduce quadratic divergences in the model) at the Grand Unification
(GUT) scale. Weak–scale phenomenology is then obtained by running
Renormalization Group Equation (RGE). In these models the ElectroWeak (EW) symmetry is broken radiatively. In this kind of models
the calculation of the susy particle spectrum include the evaluation of
all 1–loop corrections, in order to fix the boundary conditions of the
RGEs, and the numerical solution of coupled RGE’s for all couplings
and soft breaking terms. I have also worked in the study of alternative
scenarios, where SUGRA boundary conditions are relaxed. Recently
I have calculated the cosmological lower limit of the neutralino mass
in models without gaugino unification, improving previous results. I
have also analyzed phenomenological models where all physical parameters are directly defined at the EW scale with the smaller number of
theoretical assumptions.
• Implications on the neutralino relic abundance and on dark matter
searches of accelerator measurements. I have developed codes to implement the calculation of susy corrections to FCNC effects like the
b → sγ decay, the evaluation of the susy contribution to the anomalous
magnetic moment of the muon, the evaluation of detection rates of susy
Higgs bosons at LEP, and in general the impact of updated accelerator
bounds on the couplings and masses of supersymmetric particles.
• Aspects related to low–background detectors. During my stay at the
underground Laboratory of Nuclear Physics of Canfranc (Spain) I
could develop some skills directly related to experimental dark matter searches, in particular in data analysis and background study (from
radioactive contaminations and cosmogenics).
In addition to my scientific activity, I have developed technical knowl-
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25
edge of computers. In particular I have worked in the development of complex codes for the calculation of neutralino and axion phenomenology. My
technical computer skills include:
• Operating systems: Linux, Windows, VMS
• Program languages: Fortran, C
• Symbolic calculus: Maple
• Text and graphics processing: Word, LaTeX, SuperMongo, Gnuplot
• Numerical tools: Montecarlo techniques, numerical libraries (Numerical
Recipes, Cernlib).
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Stefano Scopel