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

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

2008-11-20

arxiv.org/abs/0811.3357v4

Prog.Theor.Phys.122:553-559,2009

Astronomy and Astrophysics

Astrophysics

the version accepted by Progress of Theoretical Physics (PTP)

Scientific paper

10.1143/PTP.122.553

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(10^26) seconds.

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