科研之友
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摘要
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.
- 出版日期2009-8
