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Search for resonant production of second-generation sleptons with same-sign dimuon events in proton–proton collisions at $\sqrt{s} = 13$ TeV


CMS Collaboration; Canelli, Florencia; Kilminster, Benjamin; Aarrestad, Thea; Brzhechko, Danyyl; Caminada, Lea; de Cosa, Annapaoloa; Del Burgo, Riccardo; Donato, Silvio; Galloni, Camilla; Hreus, Tomas; Leontsinis, Stefanos; Mikuni, Vinicius Massami; Neutelings, Izaak; Rauco, Giorgia; Robmann, Peter; Salerno, Daniel; Schweiger, Korbinian; Seitz, Claudia; Takahashi, Yuta; Wertz, Sebastien; Zucchetta, Alberto; et al (2019). Search for resonant production of second-generation sleptons with same-sign dimuon events in proton–proton collisions at $\sqrt{s} = 13$ TeV. European Physical Journal B: Condensed Matter and Complex Systems, C79(4):305.

Abstract

A search is presented for resonant production of second-generation sleptons $(\widetilde{\mu } _{\mathrm {L}}, \widetilde{\nu }_{\mu }$) via the R-parity-violating coupling ${\lambda ^{\prime }_{211}}$ to quarks, in events with two same-sign muons and at least two jets in the final state. The smuon (muon sneutrino) is expected to decay into a muon and a neutralino (chargino), which will then decay into a second muon and at least two jets. The analysis is based on the 2016 data set of proton-proton collisions at $\sqrt{s}=13\,\text {TeV}$ recorded with the CMS detector at the LHC, corresponding to an integrated luminosity of 35.9 $\,\text {fb}^{-1}$. No significant deviation is observed with respect to standard model expectations. Upper limits on cross sections, ranging from 0.24 to 730 $\,\text {fb}$, are derived in the context of two simplified models representing the dominant signal contributions leading to a same-sign muon pair. The cross section limits are translated into coupling limits for a modified constrained minimal supersymmetric model with ${\lambda ^{\prime }_{211}}$ as the only nonzero R-parity violating coupling. The results significantly extend restrictions of the parameter space compared with previous searches for similar models.

Abstract

A search is presented for resonant production of second-generation sleptons $(\widetilde{\mu } _{\mathrm {L}}, \widetilde{\nu }_{\mu }$) via the R-parity-violating coupling ${\lambda ^{\prime }_{211}}$ to quarks, in events with two same-sign muons and at least two jets in the final state. The smuon (muon sneutrino) is expected to decay into a muon and a neutralino (chargino), which will then decay into a second muon and at least two jets. The analysis is based on the 2016 data set of proton-proton collisions at $\sqrt{s}=13\,\text {TeV}$ recorded with the CMS detector at the LHC, corresponding to an integrated luminosity of 35.9 $\,\text {fb}^{-1}$. No significant deviation is observed with respect to standard model expectations. Upper limits on cross sections, ranging from 0.24 to 730 $\,\text {fb}$, are derived in the context of two simplified models representing the dominant signal contributions leading to a same-sign muon pair. The cross section limits are translated into coupling limits for a modified constrained minimal supersymmetric model with ${\lambda ^{\prime }_{211}}$ as the only nonzero R-parity violating coupling. The results significantly extend restrictions of the parameter space compared with previous searches for similar models.

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Item Type:Journal Article, refereed, original work
Communities & Collections:07 Faculty of Science > Physics Institute
Dewey Decimal Classification:530 Physics
Language:English
Date:2019
Deposited On:08 Jan 2020 11:20
Last Modified:18 Feb 2020 11:02
Publisher:Springer
ISSN:1434-6028
OA Status:Green
Publisher DOI:https://doi.org/10.1140/epjc/s10052-019-6800-x

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