TY - JOUR
T1 - R-violating decay of Wino dark matter and electron/positron excesses in the PAMELA/Fermi experiments
AU - Shirai, Satoshi
AU - Takahashi, Fuminobu
AU - Yanagida, T. T.
N1 - Funding Information:
We thank Junji Hisano and Hitoshi Murayama for discussion. The work of S.S. is supported in part by JSPS Research Fellowships for Young Scientists . The work of F.T. was supported by JSPS Grant-in-Aid for Young Scientists (B) (21740160) . This work was supported by World Premier International Center Initiative (WPI Program), MEXT , Japan.
PY - 2009/10/12
Y1 - 2009/10/12
N2 - We show that R-parity violating decay of Wino dark matter of mass about 3 TeV can naturally account for the flux and spectral shape of the cosmic-ray electrons and positrons observed by the PAMELA and Fermi satellites. To provide a theoretical basis for the scenario, we present a model in which trilinear R-parity breaking appears with a coefficient suppressed by powers of the gravitino mass, which naturally leads to the Wino lifetime of O (1026) seconds.
AB - We show that R-parity violating decay of Wino dark matter of mass about 3 TeV can naturally account for the flux and spectral shape of the cosmic-ray electrons and positrons observed by the PAMELA and Fermi satellites. To provide a theoretical basis for the scenario, we present a model in which trilinear R-parity breaking appears with a coefficient suppressed by powers of the gravitino mass, which naturally leads to the Wino lifetime of O (1026) seconds.
UR - http://www.scopus.com/inward/record.url?scp=70349416488&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=70349416488&partnerID=8YFLogxK
U2 - 10.1016/j.physletb.2009.09.049
DO - 10.1016/j.physletb.2009.09.049
M3 - Article
AN - SCOPUS:70349416488
VL - 680
SP - 485
EP - 488
JO - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
JF - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
SN - 0370-2693
IS - 5
ER -