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      Lepton flavor-changing processes in R-parity violating MSSM: Z->l_i l_j and \gamma\gamma->l_i l_j under new bounds from l_i->l_j \gamma

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          Abstract

          We examine the lepton flavor-changing processes in R-parity violating MSSM. First, we update the constraints on the relevant R-violating couplings by using the latest data on the rare decays l_i->l_j \gamma. We find that the updated constraints are much stronger than the old ones from rare Z-decays at LEP. Then we calculate the processes Z->l_i l_j and \gamma\gamma->l_i l_j. We find that with the updated constraints the R-violating couplings can still enhance the rates of these processes to the sensitivity of GigaZ and photon-photon collision options of the ILC.

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          R-parity violation and uses of the rare decay sneutrino-->gamma+gamma in hadron and photon colliders

          We consider implications of the loop process sneutrino -> gamma gamma in the MSSM with R-parity violation for future experiments, where the sneutrino is produced as the only supersymmetric particle. We present a scenario for the R-parity violating couplings, where this clean decay, although rare with Br(sneutrino -> gamma gamma) ~ 10^{-6}, may be useful for sneutrino detection over a range of sneutrino masses at the LHC. Furthermore, the new sneutrino-gamma-gamma effective coupling may induce detectable sneutrino resonant production in gamma gamma collisions, over a considerably wide mass range. We compare sneutrino -> gamma gamma, gg throughout the paper with the analogous yet quantitatively very different, Higgs -> gamma gamma, gg decays and comment on the loop processes sneutrino -> WW, ZZ.
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            Author and article information

            Journal
            2009-08-31
            2010-01-07
            Article
            10.1016/j.nuclphysb.2009.12.016
            0908.4556
            5e3fea93-d085-4b96-b5a6-46c1752edb77

            http://arxiv.org/licenses/nonexclusive-distrib/1.0/

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            Custom metadata
            Nucl.Phys.B829:370-382,2010
            Version in Nucl.Phys.B (discussions added)
            hep-ph hep-ex

            High energy & Particle physics
            High energy & Particle physics

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