Study of central exclusive π + π − production in proton-proton collisions at √ s = 5.02 and 13TeV
Autor(a) principal: | |
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Data de Publicação: | 2020 |
Outros Autores: | , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Institucional da UFRGS |
Texto Completo: | http://hdl.handle.net/10183/217333 |
Resumo: | Central exclusive and semiexclusive production of π+π− pairs is measured with the CMS detector in proton proton collisions at the LHC at center-of-mass energies of 5.02 and 13 TeV. The theoretical description of these nonperturbative processes, which have not yet been measured in detail at the LHC, poses a significant challenge to models. The two pions are measured and identified in the CMS silicon tracker based on specific energy loss, whereas the absence of other particles is ensured by calorimeter information. The total and differential cross sections of exclusive and semiexclusive central π+π− production are measured as functions of invariant mass, transverse momentum, and rapidity of the π+π− system in the fiducial region defined as transverse momentum pT(π) > 0.2GeV and pseudorapidity |η(π)| < 2.4. The production cross sections for the four resonant channels f0(500), ρ0 (770), f0(980), and f2(1270) are extracted using a simple model. These results represent the first measurement of this process at the LHC collision energies of 5.02 and 13 TeV. |
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Sirunyan, A. M.Silveira, Gustavo Gil daCMS Collaboration2021-01-14T04:11:32Z20201434-6044http://hdl.handle.net/10183/217333001120268Central exclusive and semiexclusive production of π+π− pairs is measured with the CMS detector in proton proton collisions at the LHC at center-of-mass energies of 5.02 and 13 TeV. The theoretical description of these nonperturbative processes, which have not yet been measured in detail at the LHC, poses a significant challenge to models. The two pions are measured and identified in the CMS silicon tracker based on specific energy loss, whereas the absence of other particles is ensured by calorimeter information. The total and differential cross sections of exclusive and semiexclusive central π+π− production are measured as functions of invariant mass, transverse momentum, and rapidity of the π+π− system in the fiducial region defined as transverse momentum pT(π) > 0.2GeV and pseudorapidity |η(π)| < 2.4. The production cross sections for the four resonant channels f0(500), ρ0 (770), f0(980), and f2(1270) are extracted using a simple model. These results represent the first measurement of this process at the LHC collision energies of 5.02 and 13 TeV.application/pdfengThe European physical journal. C, Particles and fields. Berlin. Vol. 80, no. 8 (Aug. 2020), 718, 28 p.Aceleradores de partículasColisões proton-protonStudy of central exclusive π + π − production in proton-proton collisions at √ s = 5.02 and 13TeVEstrangeiroinfo: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:UFRGSTEXT001120268.pdf.txt001120268.pdf.txtExtracted Texttext/plain103930http://www.lume.ufrgs.br/bitstream/10183/217333/2/001120268.pdf.txtbe6d672ead318df14a97de8bf4be01d1MD52ORIGINAL001120268.pdfTexto completo (inglês)application/pdf1484194http://www.lume.ufrgs.br/bitstream/10183/217333/1/001120268.pdf287c7a820c9b4973e765a5e5b4947ef2MD5110183/2173332023-07-22 03:41:31.02118oai:www.lume.ufrgs.br:10183/217333Repositório de PublicaçõesPUBhttps://lume.ufrgs.br/oai/requestopendoar:2023-07-22T06:41:31Repositório Institucional da UFRGS - Universidade Federal do Rio Grande do Sul (UFRGS)false |
dc.title.pt_BR.fl_str_mv |
Study of central exclusive π + π − production in proton-proton collisions at √ s = 5.02 and 13TeV |
title |
Study of central exclusive π + π − production in proton-proton collisions at √ s = 5.02 and 13TeV |
spellingShingle |
Study of central exclusive π + π − production in proton-proton collisions at √ s = 5.02 and 13TeV Sirunyan, A. M. Aceleradores de partículas Colisões proton-proton |
title_short |
Study of central exclusive π + π − production in proton-proton collisions at √ s = 5.02 and 13TeV |
title_full |
Study of central exclusive π + π − production in proton-proton collisions at √ s = 5.02 and 13TeV |
title_fullStr |
Study of central exclusive π + π − production in proton-proton collisions at √ s = 5.02 and 13TeV |
title_full_unstemmed |
Study of central exclusive π + π − production in proton-proton collisions at √ s = 5.02 and 13TeV |
title_sort |
Study of central exclusive π + π − production in proton-proton collisions at √ s = 5.02 and 13TeV |
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 |
topic |
Aceleradores de partículas Colisões proton-proton |
description |
Central exclusive and semiexclusive production of π+π− pairs is measured with the CMS detector in proton proton collisions at the LHC at center-of-mass energies of 5.02 and 13 TeV. The theoretical description of these nonperturbative processes, which have not yet been measured in detail at the LHC, poses a significant challenge to models. The two pions are measured and identified in the CMS silicon tracker based on specific energy loss, whereas the absence of other particles is ensured by calorimeter information. The total and differential cross sections of exclusive and semiexclusive central π+π− production are measured as functions of invariant mass, transverse momentum, and rapidity of the π+π− system in the fiducial region defined as transverse momentum pT(π) > 0.2GeV and pseudorapidity |η(π)| < 2.4. The production cross sections for the four resonant channels f0(500), ρ0 (770), f0(980), and f2(1270) are extracted using a simple model. These results represent the first measurement of this process at the LHC collision energies of 5.02 and 13 TeV. |
publishDate |
2020 |
dc.date.issued.fl_str_mv |
2020 |
dc.date.accessioned.fl_str_mv |
2021-01-14T04:11:32Z |
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/10183/217333 |
dc.identifier.issn.pt_BR.fl_str_mv |
1434-6044 |
dc.identifier.nrb.pt_BR.fl_str_mv |
001120268 |
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1434-6044 001120268 |
url |
http://hdl.handle.net/10183/217333 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.ispartof.pt_BR.fl_str_mv |
The European physical journal. C, Particles and fields. Berlin. Vol. 80, no. 8 (Aug. 2020), 718, 28 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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