- Physical Review Journals
All JournalsPhysics Magazine
Access Provided by Xinjiang University

Physical Review D

Export citation

Export citation

Choose format for download:

Download Citation
  • Access by Xinjiang University

New gamma ray signal from gravitationally boosted neutralinos at the Galactic Center

M. Cannoni1,*, M. E. Gómez1,†, M. A. Pérez-García2,‡, and J. D. Vergados3,§

  • 1Departamento de Física Aplicada, Facultad de Ciencias Experimentales, Universidad de Huelva, 21071 Huelva, Spain
  • 2Departamento de Física Fundamental and IUFFyM, Universidad de Salamanca, Plaza de la Merced s/n 37008, Salamanca, Spain
  • 3Theoretical Physics Division, University of Ioannina, Ioannina, Gr 451 10, Greece

  • *mirco.cannoni@dfa.uhu.es
  • †mario.gomez@dfa.uhu.es
  • ‡mperezga@usal.es
  • §vergados@uoi.gr
PDF

Phys. Rev. D 85, 115015 – Published 21 June, 2012

DOI: https://doi.org/10.1103/PhysRevD.85.115015

Abstract

We discuss the possibility that colliding dark matter particles in the form of neutralinos may be gravitationally boosted near the supermassive black hole at the Galactic center so that they can have enough collision energy to annihilate into a stau pair. Since in some phenomenologically favored supersymmetric models the mass splitting between the neutralino and the lightest stau, one of the two scalar superpartners of the tau lepton, is a few GeV, this channel may be allowed. In addition, staus can decay only into a tau lepton and another neutralino. We calculate the gamma ray spectrum and flux generated by the tau pair discussing the observability of the obtained features.

View figure in article

Article Text

References (33)

  1. D. Larson et al., Astrophys. J. Suppl. Ser. 192, 16 (2011).
  2. J. R. Ellis, T. Falk, K. A. Olive, and M. Srednicki, Astropart. Phys. 13, 181 (2000); 15, 413(E) (2001); M. E. Gomez, G. Lazarides, and C. Pallis, Phys. Rev. D 61, 123512 (2000); T. Nihei, L. Roszkowski, and R. Ruiz de Austri, J. High Energy Phys. 07 (2002) 024; J. Edsjo, M. Schelke, P. Ullio, and P. Gondolo, J. Cosmol. Astropart. Phys. 04 (2003) 001.
  3. K. Griest and D. Seckel, Phys. Rev. D 43, 3191 (1991).
  4. J. F. Navarro, E. Hayashi, C. Power, A. R. Jenkins, C. S. Frenk, S. D. M. White, V. Springel, J. Stadel, and T. R. Quinn, Mon. Not. R. Astron. Soc. 349, 1039 (2004); A. W. Graham, D. Merritt, B. Moore, J. Diemand, and B. Terzic, Astron. J. 132, 2685 (2006).
  5. Y. B. Zeldovich, A. A. Klypin, M. Y. Khlopov, and V. M. Chechetkin, Yad. Fiz. 31, 1286 (1980) [Sov. J. Nucl. Phys. 31, 664 (1980)]. J. Silk and M. Srednicki, Phys. Rev. Lett. 53, 624 (1984); F. W. Stecker and A. J. Tylka, Astrophys. J. 343, 169 (1989); V. Berezinsky, A. Bottino, and G. Mignola, Phys. Lett. B 325, 136 (1994); L. Bergstrom, P. Ullio, and J. H. Buckley, Astropart. Phys. 9, 137 (1998); A. Cesarini, F. Fucito, A. Lionetto, A. Morselli, and P. Ullio, 21, 267 (2004); N. Fornengo, L. Pieri, and S. Scopel, Phys. Rev. D 70, 103529 (2004); J. Ellis, K. A. Olive, and V. C. Spanos, J. Cosmol. Astropart. Phys. 10 (2011) 024.
  6. L. Bergstrom, Phys. Lett. B 225, 372 (1989); R. Flores, K. A. Olive, and S. Rudaz, 232, 377 (1989); L. Bergstrom, T. Bringmann, M. Eriksson, and M. Gustafsson, Phys. Rev. Lett. 95, 241301 (2005); T. Bringmann, L. Bergstrom, and J. Edsjo, J. High Energy Phys. 01 (2008) 049; M. Cannoni, M. E. Gomez, M. A. Sanchez-Conde, F. Prada, and O. Panella, Phys. Rev. D 81, 107303 (2010); M. A. Sanchez-Conde, M. Cannoni, F. Zandanel, M. E. Gomez, and F. Prada, J. Cosmol. Astropart. Phys. 12 (2011) 011.
  7. L. Bergstrom and P. Ullio, Nucl. Phys. B504, 27 (1997); Z. Bern, P. Gondolo, and M. Perelstein, Phys. Lett. B 411, 86 (1997); P. Ullio and L. Bergstrom, Phys. Rev. D 57, 1962 (1998).
  8. A. M. Ghez et al., Astrophys. J. 689, 1044 (2008).
  9. M. Banados, J. Silk, and S. M. West, Phys. Rev. Lett. 103, 111102 (2009).
  10. A. Baushev, Int. J. Mod. Phys. D 18, 1195 (2009).
  11. M. Banados, B. Hassanain, J. Silk, and S. M. West, Phys. Rev. D 83, 023004 (2011); A. J. Williams, 83, 123004 (2011).
  12. M. A. Amin and T. Wizansky, Phys. Rev. D 77, 123510 (2008).
  13. J. Binney and S. Tremaine, Galactic Dynamics (Princeton University, Princeton, NJ, 1987).
  14. O. Y. Gnedin and J. R. Primack, Phys. Rev. Lett. 93, 061302 (2004).
  15. D. Merritt, Phys. Rev. Lett. 92, 201304 (2004).
  16. G. Belanger, F. Boudjema, P. Brun, A. Pukhov, S. Rosier-Lees, P. Salati, and A. Semenov, Comput. Phys. Commun. 182, 842 (2011).
  17. A. Pukhov, arXiv:hep-ph/0412191.
  18. B. C. Allanach, Comput. Phys. Commun. 143, 305 (2002).
  19. O. Buchmueller et al., Eur. Phys. J. C 72, 1878 (2012).
  20. J. A. R. Cembranos, A. de la Cruz-Dombriz, A. Dobado, R. A. Lineros, and A. L. Maroto, Phys. Rev. D 83, 083507 (2011). Although the fit is obtained for mDM=Eτ≥25  GeV, we verified that it works well also down to a few GeV by confronting it with spectra as given in tables of MicrOMEGAs except for Eτ≃2  GeV, where we fit the high energy part of spectrum with f(x)=xa(a1x+a2x2+a3x3)exp(−bx), similar to the functional form of Fornengo, Pieri, and Scopel in Ref. [5].
  21. P. Gondolo and J. Silk, Phys. Rev. Lett. 83, 1719 (1999).
  22. G. Bertone and D. Merritt, Mod. Phys. Lett. A 20, 1021 (2005).
  23. D. Merritt, in Particle Dark Matter: Observations, Models and Searches, edited by G. Bertone (Cambridge University Press, Cambridge, England, 2010).
  24. P. Ullio, H. Zhao, and M. Kamionkowski, Phys. Rev. D 64, 043504 (2001).
  25. G. Bertone and D. Merritt, Phys. Rev. D 72, 103502 (2005).
  26. D. Merritt, S. Harfst, and G. Bertone, Phys. Rev. D 75, 043517 (2007).
  27. E. Vasiliev, Phys. Rev. D 76, 103532 (2007).
  28. E. Vasiliev and M. Zelnikov, Phys. Rev. D 78, 083506 (2008).
  29. M. Cannoni, Phys. Rev. D 84, 095017 (2011); M. Cannoni, J. D. Vergados, and M. E. Gomez, 83, 075010 (2011).
  30. G. R. Blumenthal, S. M. Faber, R. Flores, and J. R. Primack, Astrophys. J. 301, 27 (1986); F. Prada, A. Klypin, J. Flix Molina, M. Martinez, and E. Simonneau, Phys. Rev. Lett. 93, 241301 (2004); Y. Mambrini, C. Munoz, E. Nezri, and F. Prada, J. Cosmol. Astropart. Phys. 01 (2006) 010.
  31. V. Vitale et al. (Fermi-LAT Collaboration), arXiv:0912.3828; Fermi-LAT CollaborationNucl. Instrum. Methods Phys. Res., Sect. A 630, 147 (2011).
  32. D. Hooper and T. Linden, Phys. Rev. D 84, 123005 (2011).
  33. A. Morselli, in Proceedings of the Sixth MultiDark Workshop, Canfranc Underground Laboratory, 2012 (unpublished), http://www.ift.uam.es/iftworkshops/index.php?id=26.

Outline

Information

Phys. Rev. D 85, 115015– Published 21 June, 2012
  • Received 25 April 2012

© 2012 American Physical Society

Sign In to Your Journals Account

Filter

Filter

Article Lookup

Enter a citation