TY  - JOUR
AU  - Kaneko, S.
AU  - Saito, H.
AU  - Sato, J.
AU  - Shimomura, T.
AU  - Vives, O.
AU  - Yamanaka, M.
PY  - 2011
DA  - 2011//
TI  - Correlation between flavor-violating decay of long-lived slepton and tau in the coannihilation scenario with the seesaw mechanism
T2  - Phys. Rev. D
JO  - Physical Review D
SP  - 115005 - 10pp
VL  - 83
IS  - 11
PB  - Amer Physical Soc
AB  - We investigate flavor violating decays of the long-lived lightest slepton and the tau lepton in the coannihilation region of the minimal supersymmetric standard model with a seesaw mechanism to generate neutrino masses. We consider a situation where the mass difference between the lightest neutralino, as the lightest supersymmetric particle, and the lightest slepton, as the next-to-lightest supersymmetric particle, is smaller than the mass of tau lepton. In this situation, the lifetime of the lightest slepton is very long and it is determined by lepton flavor violating (LFV) couplings because the slepton mainly consists of the lighter stau and the flavor conserving 2-body decay is kinematically forbidden. We show that the lifetime can change many orders of magnitude by varying the Yukawa couplings entering the seesaw mechanism. We also show that the branching ratios of LFV tau decays are strongly correlated with the lightest slepton lifetime. Therefore the branching ratios of LFV tau decays can be determined or constrained by measuring the slepton lifetime at the LHC experiment.
SN  - 1550-7998
UR  - http://arxiv.org/abs/1102.1794
UR  - https://doi.org/10.1103/PhysRevD.83.115005
DO  - 10.1103/PhysRevD.83.115005
LA  - English
N1  - ISI:000291258500007
ID  - Kaneko_etal2011
ER  -