R-parity breaking via type II seesaw,decaying gravitino dark matter and PAMELA positron excess |
| |
| Authors: | Shao-Long Chen Rabindra N Mohapatra Shmuel Nussinov Yue Zhang |
| |
| Institution: | 1. Maryland Center for Fundamental Physics and Department of Physics, University of Maryland, College Park, MD 20742, USA;2. Tel Aviv University, Israel and Chapman College, CA, USA;3. Center for High-Energy Physics and Institute of Theoretical Physics, Peking University, Beijing 100871, China |
| |
| Abstract: | We propose a new class of R-parity violating extension of MSSM with type II seesaw mechanism for neutrino masses where an unstable gravitino is the dark matter of the Universe. It decays predominantly into three leptons final states, thereby providing a natural explanation of the positron excess but no antiproton excess in the PAMELA experiment. The model can explain neutrino masses without invoking any high scale physics while keeping the pre-existing baryon asymmetry of the universe in tact. |
| |
| Keywords: | |
| 本文献已被 ScienceDirect 等数据库收录！ |
|
