Wino Dark Matter in light of the AMS-02 2015 Data - INSPIRE

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Wino Dark Matter in light of the AMS-02 2015 Data

Masahiro Ibe
(
- Tokyo U., ICRR and
- Tokyo U., IPMU
)
,
Shigeki Matsumoto
(
- Tokyo U., IPMU
)
,
Satoshi Shirai
(
- DESY
)
,
Tsutomu T. Yanagida
(
- Tokyo U., IPMU
)

Apr 21, 2015

6 pages

Published in:

Phys.Rev.D 91 (2015) 11, 111701

Published: Jun 18, 2015

e-Print:

1504.05554 [hep-ph]

DOI:

10.1103/PhysRevD.91.111701

Report number:

DESY-15-054,
IPMU-15-0053

View in:

ADS Abstract Service

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Abstract: (APS)

The AMS-02 collaboration has recently reported the antiproton to proton ratio with improved accuracy. In view of uncertainties of the production and the propagation of the cosmic rays, the observed ratio is still consistent with the secondary astrophysical antiproton to proton ratio. However, it is nonetheless enticing to examine whether the observed spectrum can be explained by a strongly motivated dark matter, the wino dark matter. As we will show, the antiproton flux from the wino annihilation can explain the observed spectrum well for its mass range 2.5–3 TeV. The fit to data becomes particularly well compared to the case without the annihilation for the thermal wino dark matter case with a mass about 3 TeV. The ratio is predicted to decrease quickly at the energy several hundreds of GeV, which will be confirmed or ruled out in the near future when the AMS-02 experiment accumulates enough data at this higher energy region.

Note:

6 pages, 2 figures, version accepted for publication in PRD (Rapid Communication)

12.60.Jv
12.60.-i
95.35.+d
Wino: dark matter
anti-p: flux
cosmic radiation: propagation
energy: high
dark matter: annihilation
relic density: thermal
AMS

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