Measuring lepton flavor violation at LHC with a long-lived slepton in the coannihilation region
- Instituto Fisica Corpuscular - C.S.I.C/Universitat de Valencia Campus de Paterna, Apt 22085, E46071, Valencia (Spain) and CFTP, Departamento de Fisica Instituto Superior Tecnico, Avenida Rovisco Pais, 1 1049-001 Lisboa (Portugal)
- Department of Physics, Saitama University, Shimo-Okubo, Sakura-ku, Saitama, 338-8570 (Japan)
- Departament de Fisica Teorica and IFIC, Universitat de Valencia - CSIC, E46100, Burjassot, Valencia (Spain)
When the mass difference between the lightest slepton, the next to lightest supersymmetric particle, and the lightest neutralino, the lightest supersymmetric particle, is smaller than the tau mass, the lifetime of the lightest slepton increases in many orders of magnitude with respect to typical lifetimes of other supersymmetric particles. These small mass differences are possible in the minimal supersymmetric standard model (MSSM) and, for instance, they correspond to the coannihilation region of the constrained MSSM for M{sub 1/2} > or approx. 700 GeV. In a general gravity-mediated MSSM, where the lightest supersymmetric particle is the neutralino, the lifetime of the lightest slepton is inversely proportional to the square of the intergenerational mixing in the slepton mass matrices. Such a long-lived slepton would produce a distinctive signature at LHC and a measurement of its lifetime would be relatively simple. Therefore, the long-lived slepton scenario offers an excellent opportunity to study lepton flavor violation at ATLAS and CMS detectors in the LHC and an improvement of the leptonic mass insertion bounds by more than 5 orders of magnitude would be possible.
- OSTI ID:
- 21251061
- Journal Information:
- Physical Review. D, Particles Fields, Journal Name: Physical Review. D, Particles Fields Journal Issue: 11 Vol. 78; ISSN PRVDAQ; ISSN 0556-2821
- Country of Publication:
- United States
- Language:
- English
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