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Prog. Theor. Phys. Vol. 122 No. 2 (2009) pp. 553-559

[ Full Text PDF : FREE ACCESS (278K) ]

Letters

Decaying Hidden Gauge Boson and the PAMELA and ATIC/PPB-BETS Anomalies

Chuan-Ren Chen,1 Mihoko M. Nojiri,1,3 Fuminobu Takahashi1 and Tsutomu T. Yanagida1,2

1Institute for the Physics and Mathematics of the Universe,
University of Tokyo, Kashiwa 277-8568, Japan
2Department of Physics, University of Tokyo, Tokyo 113-0033, Japan
3Theory Group, KEK, and the Graduate University for Advanced Studies
(SOKENDAI), Tsukuba 305-0801, Japan

(Received May 8, 2009; Revised May 28, 2009)

Abstract:

We show that the PAMELA anomaly in the positron fraction as well as the ATIC/PPB-BETS excesses in the e- + e+ flux are simultaneously explained in our scenario that a hidden U(1)H gauge boson constitutes dark matter of the Universe and decays into the standard-model particles through a kinetic mixing with an U(1)B-L gauge boson. Interestingly, the B-L charge assignment suppresses an antiproton flux in consistent with the PAMELA and BESS experiments, while the hierarchy between the B-L symmetry breaking scale and the weak scale naturally leads to the right lifetime of O(1026) seconds.

Subject Index : 171, 174
URL : http://ptp.ipap.jp/link?PTP/122/553/
DOI : 10.1143/PTP.122.553

[ Full Text PDF : FREE ACCESS (278K) ] Citation:

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Citing Article(s) :

  1. Progress of Theoretical Physics Vol. 122 No. 5 (2009) pp. 1277-1284 :
    Cosmic-Ray Electron and Positron Excesses from Hidden Gaugino Dark Matter
    Satoshi Shirai, Fuminobu Takahashi and Tsutomu T. Yanagida
  2. Progress of Theoretical Physics Vol. 123 No. 4 (2010) pp. 743-755 :
    A Gamma-Ray Burst/Pulsar for Cosmic Ray Positrons with a Dark Matter-Like Spectrum
    Kunihito Ioka

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