Search for resonant and nonresonant new phenomena in high-mass dilepton final states at s√ = 13 TeV
Autor(a) principal: | |
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Data de Publicação: | 2021 |
Outros Autores: | , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Institucional da UFRGS |
Texto Completo: | http://hdl.handle.net/10183/235078 |
Resumo: | A search is presented for physics beyond the standard model (SM) using electron or muon pairs with high invariant mass. A data set of proton-proton collisions collected by the CMS experiment at the LHC at s√ = 13 TeV from 2016 to 2018 corresponding to a total integrated luminosity of up to 140 fb−1 is analyzed. No significant deviation is observed with respect to the SM background expectations. Upper limits are presented on the ratio of the product of the production cross section and the branching fraction to dileptons of a new narrow resonance to that of the Z boson. These provide the most stringent lower limits to date on the masses for various spin-1 particles, spin-2 gravitons in the Randall-Sundrum model, as well as spin-1 mediators between the SM and dark matter particles. Lower limits on the ultraviolet cutoff parameter are set both for four-fermion contact interactions and for the Arkani-Hamed, Dimopoulos, and Dvali model with large extra dimensions. Lepton flavor universality is tested at the TeV scale for the first time by comparing the dimuon and dielectron mass spectra. No significant deviation from the SM expectation of unity is observed. |
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Sirunyan, A. M.Silveira, Gustavo Gil daCMS Collaboration2022-02-12T04:51:40Z20211029-8479http://hdl.handle.net/10183/235078001130621A search is presented for physics beyond the standard model (SM) using electron or muon pairs with high invariant mass. A data set of proton-proton collisions collected by the CMS experiment at the LHC at s√ = 13 TeV from 2016 to 2018 corresponding to a total integrated luminosity of up to 140 fb−1 is analyzed. No significant deviation is observed with respect to the SM background expectations. Upper limits are presented on the ratio of the product of the production cross section and the branching fraction to dileptons of a new narrow resonance to that of the Z boson. These provide the most stringent lower limits to date on the masses for various spin-1 particles, spin-2 gravitons in the Randall-Sundrum model, as well as spin-1 mediators between the SM and dark matter particles. Lower limits on the ultraviolet cutoff parameter are set both for four-fermion contact interactions and for the Arkani-Hamed, Dimopoulos, and Dvali model with large extra dimensions. Lepton flavor universality is tested at the TeV scale for the first time by comparing the dimuon and dielectron mass spectra. No significant deviation from the SM expectation of unity is observed.application/pdfengThe journal of high energy physics. Trieste. No. 7 (July 2021), 208, 62 p.Aceleradores de partículasColisões proton-protonProdução de leptonsBeyond Standard ModelHadron-Hadron scattering (experiments)Lepton productionParticle and resonance productionSearch for resonant and nonresonant new phenomena in high-mass dilepton final states at s√ = 13 TeVEstrangeiroinfo:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/openAccessreponame:Repositório Institucional da UFRGSinstname:Universidade Federal do Rio Grande do Sul (UFRGS)instacron:UFRGSTEXT001130621.pdf.txt001130621.pdf.txtExtracted Texttext/plain169593http://www.lume.ufrgs.br/bitstream/10183/235078/2/001130621.pdf.txt4cc7b31083fe0e8161c575d9e78b3d76MD52ORIGINAL001130621.pdfTexto completo (inglês)application/pdf1316879http://www.lume.ufrgs.br/bitstream/10183/235078/1/001130621.pdf2f7e5ea670e43ed58c0916942ed983d1MD5110183/2350782023-07-20 03:34:59.3271oai:www.lume.ufrgs.br:10183/235078Repositório de PublicaçõesPUBhttps://lume.ufrgs.br/oai/requestopendoar:2023-07-20T06:34:59Repositório Institucional da UFRGS - Universidade Federal do Rio Grande do Sul (UFRGS)false |
dc.title.pt_BR.fl_str_mv |
Search for resonant and nonresonant new phenomena in high-mass dilepton final states at s√ = 13 TeV |
title |
Search for resonant and nonresonant new phenomena in high-mass dilepton final states at s√ = 13 TeV |
spellingShingle |
Search for resonant and nonresonant new phenomena in high-mass dilepton final states at s√ = 13 TeV Sirunyan, A. M. Aceleradores de partículas Colisões proton-proton Produção de leptons Beyond Standard Model Hadron-Hadron scattering (experiments) Lepton production Particle and resonance production |
title_short |
Search for resonant and nonresonant new phenomena in high-mass dilepton final states at s√ = 13 TeV |
title_full |
Search for resonant and nonresonant new phenomena in high-mass dilepton final states at s√ = 13 TeV |
title_fullStr |
Search for resonant and nonresonant new phenomena in high-mass dilepton final states at s√ = 13 TeV |
title_full_unstemmed |
Search for resonant and nonresonant new phenomena in high-mass dilepton final states at s√ = 13 TeV |
title_sort |
Search for resonant and nonresonant new phenomena in high-mass dilepton final states at s√ = 13 TeV |
author |
Sirunyan, A. M. |
author_facet |
Sirunyan, A. M. Silveira, Gustavo Gil da CMS Collaboration |
author_role |
author |
author2 |
Silveira, Gustavo Gil da CMS Collaboration |
author2_role |
author author |
dc.contributor.author.fl_str_mv |
Sirunyan, A. M. Silveira, Gustavo Gil da CMS Collaboration |
dc.subject.por.fl_str_mv |
Aceleradores de partículas Colisões proton-proton Produção de leptons |
topic |
Aceleradores de partículas Colisões proton-proton Produção de leptons Beyond Standard Model Hadron-Hadron scattering (experiments) Lepton production Particle and resonance production |
dc.subject.eng.fl_str_mv |
Beyond Standard Model Hadron-Hadron scattering (experiments) Lepton production Particle and resonance production |
description |
A search is presented for physics beyond the standard model (SM) using electron or muon pairs with high invariant mass. A data set of proton-proton collisions collected by the CMS experiment at the LHC at s√ = 13 TeV from 2016 to 2018 corresponding to a total integrated luminosity of up to 140 fb−1 is analyzed. No significant deviation is observed with respect to the SM background expectations. Upper limits are presented on the ratio of the product of the production cross section and the branching fraction to dileptons of a new narrow resonance to that of the Z boson. These provide the most stringent lower limits to date on the masses for various spin-1 particles, spin-2 gravitons in the Randall-Sundrum model, as well as spin-1 mediators between the SM and dark matter particles. Lower limits on the ultraviolet cutoff parameter are set both for four-fermion contact interactions and for the Arkani-Hamed, Dimopoulos, and Dvali model with large extra dimensions. Lepton flavor universality is tested at the TeV scale for the first time by comparing the dimuon and dielectron mass spectra. No significant deviation from the SM expectation of unity is observed. |
publishDate |
2021 |
dc.date.issued.fl_str_mv |
2021 |
dc.date.accessioned.fl_str_mv |
2022-02-12T04:51:40Z |
dc.type.driver.fl_str_mv |
Estrangeiro info:eu-repo/semantics/article |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
http://hdl.handle.net/10183/235078 |
dc.identifier.issn.pt_BR.fl_str_mv |
1029-8479 |
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001130621 |
identifier_str_mv |
1029-8479 001130621 |
url |
http://hdl.handle.net/10183/235078 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.ispartof.pt_BR.fl_str_mv |
The journal of high energy physics. Trieste. No. 7 (July 2021), 208, 62 p. |
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info:eu-repo/semantics/openAccess |
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openAccess |
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application/pdf |
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