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순수물리이론 연구단
순수물리이론 연구단
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Sampling the mu nu SSM for displaced decays of the tau left sneutrino LSP at the LHC

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Title
Sampling the mu nu SSM for displaced decays of the tau left sneutrino LSP at the LHC
Author(s)
Essodjolo Kpatcha; Iñaki Lara; Daniel E. López-Fogliani; Carlos Muñoz; Natsumi Nagata; Hidetoshi Otono; Roberto Ruiz de Austri
Publication Date
2019-11
Journal
EUROPEAN PHYSICAL JOURNAL C, v.79, no.11, pp.934 -
Publisher
SPRINGER
Abstract
Within the framework of the mu nu SSM, a displaced dilepton signal is expected at the LHC from the decay of a tau left sneutrino as the lightest supersymmetric particle (LSP) with a mass in the range 45-100 GeV. We compare the predictions of this scenario with the ATLAS search for long-lived particles using displaced lepton pairs in pp collisions, considering an optimization of the trigger requirements by means of a high level trigger that exploits tracker information. The analysis is carried out in the general case of three families of right-handed neutrino superfields, where all the neutrinos get contributions to their masses at tree level. To analyze the parameter space, we sample the mu nu SSM for a tau left sneutrino LSP with proper decay length c tau>0.1mm using a likelihood data-driven method, and paying special attention to reproduce the current experimental data on neutrino and Higgs physics, as well as flavor observables. The sneutrino is special in the mu nu SSM since its couplings have to be chosen so that the neutrino oscillation data are reproduced. We find that important regions of the parameter space can be probed at the LHC run 3.© The Author(s) 2019
URI
https://pr.ibs.re.kr/handle/8788114/6781
ISSN
1434-6044
Appears in Collections:
Center for Fundamental Theory(순수물리이론 연구단) > Journal Papers (저널논문)
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