Observation of proton-tagged, central (semi)exclusive production of high-mass lepton pairs in pp collisions at 13TeV with the CMS-TOTEM precision proton spectrometer
Autor(a) principal: | |
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Data de Publicação: | 2018 |
Outros Autores: | , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Institucional da UFRGS |
Texto Completo: | http://hdl.handle.net/10183/182432 |
Resumo: | The process pp ! p`+`p( ), with `+` a muon or an electron pair produced at midrapidity with mass larger than 110 GeV, has been observed for the rst time at the LHC in pp collisions at ps = 13TeV. One of the two scattered protons is measured in the CMS-TOTEM precision proton spectrometer (CT-PPS), which operated for the rst time in 2016. The second proton either remains intact or is excited and then dissociates into a low-mass state p , which is undetected. The measurement is based on an integrated luminosity of 9.4 fb1 collected during standard, high-luminosity LHC operation. A total of 12 + and 8 e+e pairs with m(`+`) > 110 GeV, and matching forward proton kinematics, are observed, with expected backgrounds of 1:49 0:07 (stat) 0:53 (syst) and 2:36 0:09 (stat) 0:47 (syst), respectively. This corresponds to an excess of more than ve standard deviations over the expected background. The present result constitutes the rst observation of proton-tagged collisions at the electroweak scale. This measurement also demonstrates that CT-PPS performs according to the design specications. |
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Sirunyan, A. M.Silveira, Gustavo Gil daCMS CollaborationTOTEM Collaboration2018-09-22T03:01:37Z20181029-8479http://hdl.handle.net/10183/182432001075258The process pp ! p`+`p( ), with `+` a muon or an electron pair produced at midrapidity with mass larger than 110 GeV, has been observed for the rst time at the LHC in pp collisions at ps = 13TeV. One of the two scattered protons is measured in the CMS-TOTEM precision proton spectrometer (CT-PPS), which operated for the rst time in 2016. The second proton either remains intact or is excited and then dissociates into a low-mass state p , which is undetected. The measurement is based on an integrated luminosity of 9.4 fb1 collected during standard, high-luminosity LHC operation. A total of 12 + and 8 e+e pairs with m(`+`) > 110 GeV, and matching forward proton kinematics, are observed, with expected backgrounds of 1:49 0:07 (stat) 0:53 (syst) and 2:36 0:09 (stat) 0:47 (syst), respectively. This corresponds to an excess of more than ve standard deviations over the expected background. The present result constitutes the rst observation of proton-tagged collisions at the electroweak scale. This measurement also demonstrates that CT-PPS performs according to the design specications.application/pdfengThe journal of high energy physics. Trieste. No. 7 (July 2018), 153, 44 p.Aceleradores de partículasColisões proton-protonLeptonsForward physicsHadron-Hadron scattering (experiments)Photon productionProton-proton scatteringObservation of proton-tagged, central (semi)exclusive production of high-mass lepton pairs in pp collisions at 13TeV with the CMS-TOTEM precision proton spectrometerEstrangeiroinfo: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:UFRGSORIGINAL001075258.pdfTexto completo (inglês)application/pdf3468990http://www.lume.ufrgs.br/bitstream/10183/182432/1/001075258.pdf55671e95c913d861ce6fe24f02523624MD51TEXT001075258.pdf.txt001075258.pdf.txtExtracted Texttext/plain115530http://www.lume.ufrgs.br/bitstream/10183/182432/2/001075258.pdf.txt62ec4e13cbe3d1dfd0849b1ca51d4402MD52THUMBNAIL001075258.pdf.jpg001075258.pdf.jpgGenerated Thumbnailimage/jpeg1566http://www.lume.ufrgs.br/bitstream/10183/182432/3/001075258.pdf.jpg8b67618deb78036efacc391326c2c852MD5310183/1824322023-08-05 03:40:11.78087oai:www.lume.ufrgs.br:10183/182432Repositório de PublicaçõesPUBhttps://lume.ufrgs.br/oai/requestopendoar:2023-08-05T06:40:11Repositório Institucional da UFRGS - Universidade Federal do Rio Grande do Sul (UFRGS)false |
dc.title.pt_BR.fl_str_mv |
Observation of proton-tagged, central (semi)exclusive production of high-mass lepton pairs in pp collisions at 13TeV with the CMS-TOTEM precision proton spectrometer |
title |
Observation of proton-tagged, central (semi)exclusive production of high-mass lepton pairs in pp collisions at 13TeV with the CMS-TOTEM precision proton spectrometer |
spellingShingle |
Observation of proton-tagged, central (semi)exclusive production of high-mass lepton pairs in pp collisions at 13TeV with the CMS-TOTEM precision proton spectrometer Sirunyan, A. M. Aceleradores de partículas Colisões proton-proton Leptons Forward physics Hadron-Hadron scattering (experiments) Photon production Proton-proton scattering |
title_short |
Observation of proton-tagged, central (semi)exclusive production of high-mass lepton pairs in pp collisions at 13TeV with the CMS-TOTEM precision proton spectrometer |
title_full |
Observation of proton-tagged, central (semi)exclusive production of high-mass lepton pairs in pp collisions at 13TeV with the CMS-TOTEM precision proton spectrometer |
title_fullStr |
Observation of proton-tagged, central (semi)exclusive production of high-mass lepton pairs in pp collisions at 13TeV with the CMS-TOTEM precision proton spectrometer |
title_full_unstemmed |
Observation of proton-tagged, central (semi)exclusive production of high-mass lepton pairs in pp collisions at 13TeV with the CMS-TOTEM precision proton spectrometer |
title_sort |
Observation of proton-tagged, central (semi)exclusive production of high-mass lepton pairs in pp collisions at 13TeV with the CMS-TOTEM precision proton spectrometer |
author |
Sirunyan, A. M. |
author_facet |
Sirunyan, A. M. Silveira, Gustavo Gil da CMS Collaboration TOTEM Collaboration |
author_role |
author |
author2 |
Silveira, Gustavo Gil da CMS Collaboration TOTEM Collaboration |
author2_role |
author author author |
dc.contributor.author.fl_str_mv |
Sirunyan, A. M. Silveira, Gustavo Gil da CMS Collaboration TOTEM Collaboration |
dc.subject.por.fl_str_mv |
Aceleradores de partículas Colisões proton-proton Leptons |
topic |
Aceleradores de partículas Colisões proton-proton Leptons Forward physics Hadron-Hadron scattering (experiments) Photon production Proton-proton scattering |
dc.subject.eng.fl_str_mv |
Forward physics Hadron-Hadron scattering (experiments) Photon production Proton-proton scattering |
description |
The process pp ! p`+`p( ), with `+` a muon or an electron pair produced at midrapidity with mass larger than 110 GeV, has been observed for the rst time at the LHC in pp collisions at ps = 13TeV. One of the two scattered protons is measured in the CMS-TOTEM precision proton spectrometer (CT-PPS), which operated for the rst time in 2016. The second proton either remains intact or is excited and then dissociates into a low-mass state p , which is undetected. The measurement is based on an integrated luminosity of 9.4 fb1 collected during standard, high-luminosity LHC operation. A total of 12 + and 8 e+e pairs with m(`+`) > 110 GeV, and matching forward proton kinematics, are observed, with expected backgrounds of 1:49 0:07 (stat) 0:53 (syst) and 2:36 0:09 (stat) 0:47 (syst), respectively. This corresponds to an excess of more than ve standard deviations over the expected background. The present result constitutes the rst observation of proton-tagged collisions at the electroweak scale. This measurement also demonstrates that CT-PPS performs according to the design specications. |
publishDate |
2018 |
dc.date.accessioned.fl_str_mv |
2018-09-22T03:01:37Z |
dc.date.issued.fl_str_mv |
2018 |
dc.type.driver.fl_str_mv |
Estrangeiro info:eu-repo/semantics/article |
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info:eu-repo/semantics/publishedVersion |
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1029-8479 |
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001075258 |
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http://hdl.handle.net/10183/182432 |
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 2018), 153, 44 p. |
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info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
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