Probing minimal supergravity in the type-I seesaw mechanism with lepton flavour violation at the CERN LHC

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dc.creatorHirsch, M.
dc.creatorPorod, W.
dc.creatorRomao, J. C.
dc.creatorValle, J. W. F.
dc.creatordel Moral, A. Villanova
dc.date2008-04-25
dc.date2008-10-20
dc.date.accessioned2026-07-07T11:50:14Z
dc.date.available2026-07-07T11:50:14Z
dc.descriptionThe most general supersymmetric seesaw mechanism has too many parameters to be predictive and thus can not be excluded by any measurements of lepton flavour violating (LFV) processes. We focus on the simplest version of the type-I seesaw mechanism assuming minimal supergravity boundary conditions. We compute branching ratios for the LFV scalar tau decays, ${\tilde τ}_2 \to (e,μ) + χ^0_1$, as well as loop-induced LFV decays at low energy, such as $l_i \to l_j + γ$ and $l_i \to 3 l_j$, exploring their sensitivity to the unknown seesaw parameters. We find some simple, extreme scenarios for the unknown right-handed parameters, where ratios of LFV branching ratios correlate with neutrino oscillation parameters. If the overall mass scale of the left neutrinos and the value of the reactor angle were known, the study of LFV allows, in principle, to extract information about the so far unknown right-handed neutrino parameters.
dc.description29 pages, 27 figures; added explanatory comments, corrected typos, final version for publication
dc.identifierhttps://arxiv.org/abs/0804.4072
dc.identifierhttp://arxiv.org/abs/0804.4072
dc.identifierPhys.Rev.D78:013006,2008
dc.identifierdoi:10.1103/PhysRevD.78.013006
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/203498
dc.subjectHigh Energy Physics - Phenomenology
dc.titleProbing minimal supergravity in the type-I seesaw mechanism with lepton flavour violation at the CERN LHC
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