Dielectron production in proton-proton and proton-lead collisions at √sNN = 5.02 TeV
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/10183/218317 |
Resumo: | The first measurements of dielectron production at midrapidity (|ηe|<0.8) in proton–proton and proton–lead collisions at √sNN=5.02TeV at the LHC are presented. The dielectron cross section is measured with the ALICE detector as a function of the invariant mass mee and the pair transverse momentum pT,ee in the ranges mee<3.5 GeV/c2 and pT,ee<8 GeV/c, in both collision systems. In proton–proton collisions, the charm and beauty cross sections are determined at midrapidity from a fit to the data with two different event generators. This complements the existing dielectron measurements performed at √s=7 and 13 TeV. The slope of the √s dependence of the three measurements is described by FONLL calculations. The dielectron cross section measured in proton–lead collisions is in agreement, within the current precision, with the expected dielectron production without any nuclear matter effects for e+e− pairs from open heavy-flavor hadron decays. For the first time at LHC energies, the dielectron production in proton–lead and proton–proton collisions are directly compared at the same √sNN via the dielectron nuclear modification factor RpPb. The measurements are compared to model calculations including cold nuclear matter effects, or additional sources of dielectrons from thermal radiation. |
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Acharya, ShreyasiGay Ducati, Maria BeatrizPereira, Luis GustavoPezzi, Rafael PerettiALICE Collaboration2021-03-02T04:16:05Z20200556-2813http://hdl.handle.net/10183/218317001121991The first measurements of dielectron production at midrapidity (|ηe|<0.8) in proton–proton and proton–lead collisions at √sNN=5.02TeV at the LHC are presented. The dielectron cross section is measured with the ALICE detector as a function of the invariant mass mee and the pair transverse momentum pT,ee in the ranges mee<3.5 GeV/c2 and pT,ee<8 GeV/c, in both collision systems. In proton–proton collisions, the charm and beauty cross sections are determined at midrapidity from a fit to the data with two different event generators. This complements the existing dielectron measurements performed at √s=7 and 13 TeV. The slope of the √s dependence of the three measurements is described by FONLL calculations. The dielectron cross section measured in proton–lead collisions is in agreement, within the current precision, with the expected dielectron production without any nuclear matter effects for e+e− pairs from open heavy-flavor hadron decays. For the first time at LHC energies, the dielectron production in proton–lead and proton–proton collisions are directly compared at the same √sNN via the dielectron nuclear modification factor RpPb. The measurements are compared to model calculations including cold nuclear matter effects, or additional sources of dielectrons from thermal radiation.application/pdfengPhysical review. C, Nuclear physics. Melville. Vol. 102, no. 5 (Nov. 2020), 055204, 21 p.Colisões proton-protonColisao de ions pesadosAceleradores de partículasDielectron production in proton-proton and proton-lead collisions at √sNN = 5.02 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:UFRGSTEXT001121991.pdf.txt001121991.pdf.txtExtracted Texttext/plain115499http://www.lume.ufrgs.br/bitstream/10183/218317/2/001121991.pdf.txt6e53082706d9e0cec760ef99bd93790bMD52ORIGINAL001121991.pdfTexto completo (inglês)application/pdf1011784http://www.lume.ufrgs.br/bitstream/10183/218317/1/001121991.pdf2ce8cce0decb5c1b1e03483fd4ca5b61MD5110183/2183172023-11-14 04:24:46.927271oai:www.lume.ufrgs.br:10183/218317Repositório de PublicaçõesPUBhttps://lume.ufrgs.br/oai/requestopendoar:2023-11-14T06:24:46Repositório Institucional da UFRGS - Universidade Federal do Rio Grande do Sul (UFRGS)false |
dc.title.pt_BR.fl_str_mv |
Dielectron production in proton-proton and proton-lead collisions at √sNN = 5.02 TeV |
title |
Dielectron production in proton-proton and proton-lead collisions at √sNN = 5.02 TeV |
spellingShingle |
Dielectron production in proton-proton and proton-lead collisions at √sNN = 5.02 TeV Acharya, Shreyasi Colisões proton-proton Colisao de ions pesados Aceleradores de partículas |
title_short |
Dielectron production in proton-proton and proton-lead collisions at √sNN = 5.02 TeV |
title_full |
Dielectron production in proton-proton and proton-lead collisions at √sNN = 5.02 TeV |
title_fullStr |
Dielectron production in proton-proton and proton-lead collisions at √sNN = 5.02 TeV |
title_full_unstemmed |
Dielectron production in proton-proton and proton-lead collisions at √sNN = 5.02 TeV |
title_sort |
Dielectron production in proton-proton and proton-lead collisions at √sNN = 5.02 TeV |
author |
Acharya, Shreyasi |
author_facet |
Acharya, Shreyasi Gay Ducati, Maria Beatriz Pereira, Luis Gustavo Pezzi, Rafael Peretti ALICE Collaboration |
author_role |
author |
author2 |
Gay Ducati, Maria Beatriz Pereira, Luis Gustavo Pezzi, Rafael Peretti ALICE Collaboration |
author2_role |
author author author author |
dc.contributor.author.fl_str_mv |
Acharya, Shreyasi Gay Ducati, Maria Beatriz Pereira, Luis Gustavo Pezzi, Rafael Peretti ALICE Collaboration |
dc.subject.por.fl_str_mv |
Colisões proton-proton Colisao de ions pesados Aceleradores de partículas |
topic |
Colisões proton-proton Colisao de ions pesados Aceleradores de partículas |
description |
The first measurements of dielectron production at midrapidity (|ηe|<0.8) in proton–proton and proton–lead collisions at √sNN=5.02TeV at the LHC are presented. The dielectron cross section is measured with the ALICE detector as a function of the invariant mass mee and the pair transverse momentum pT,ee in the ranges mee<3.5 GeV/c2 and pT,ee<8 GeV/c, in both collision systems. In proton–proton collisions, the charm and beauty cross sections are determined at midrapidity from a fit to the data with two different event generators. This complements the existing dielectron measurements performed at √s=7 and 13 TeV. The slope of the √s dependence of the three measurements is described by FONLL calculations. The dielectron cross section measured in proton–lead collisions is in agreement, within the current precision, with the expected dielectron production without any nuclear matter effects for e+e− pairs from open heavy-flavor hadron decays. For the first time at LHC energies, the dielectron production in proton–lead and proton–proton collisions are directly compared at the same √sNN via the dielectron nuclear modification factor RpPb. The measurements are compared to model calculations including cold nuclear matter effects, or additional sources of dielectrons from thermal radiation. |
publishDate |
2020 |
dc.date.issued.fl_str_mv |
2020 |
dc.date.accessioned.fl_str_mv |
2021-03-02T04:16:05Z |
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 |
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publishedVersion |
dc.identifier.uri.fl_str_mv |
http://hdl.handle.net/10183/218317 |
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0556-2813 |
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001121991 |
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0556-2813 001121991 |
url |
http://hdl.handle.net/10183/218317 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.ispartof.pt_BR.fl_str_mv |
Physical review. C, Nuclear physics. Melville. Vol. 102, no. 5 (Nov. 2020), 055204, 21 p. |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
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openAccess |
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