Recently a weak X-ray emission around Eγ ≃ 3.5keV was detected in the Andromeda galaxy and various galaxy clusters including the Perseus galaxy cluster but its source has been unidentified. Axino, the superpartner of axion, with a mass 2Eγ is suggested as a possible origin of the line with R-parity violating decay into photon and neutrino. Moreover, most of parameter space is consistent with recent observation by the BICEP2 experiment.
|Number of pages||4|
|Journal||Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics|
|Publication status||Published - 2014 Jun 2|
Bibliographical noteFunding Information:
K.K. is supported by the U.S. DOE under Grant No. DE-FG02-12ER41809 and by the University of Kansas General Research Fund allocation 2301566. J.C.P. is supported by Basic Science Research Program through the National Research Foundation of Korea funded by the Ministry of Education ( NRF-2013R1A1A2061561 ). S.C.P. is supported by Basic Science Research Program through the National Research Foundation of Korea funded by the Ministry of Science, ICT & Future planning ( 2011-0010294 ) and the Ministry of Education ( 2011-0010294 , 2011-0029758 and NRF-2013R1A1A2064120 ).
All Science Journal Classification (ASJC) codes
- Nuclear and High Energy Physics