Λ+c production and baryon-to-meson ratios in pp and p-Pb collisions at √sNN=5.02  TeV at the LHC

Detalhes bibliográficos
Autor(a) principal: Acharya, Shreyasi
Data de Publicação: 2021
Outros Autores: Gay Ducati, Maria Beatriz, Pereira, Luis Gustavo, Pezzi, Rafael Peretti, ALICE Collaboration
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Repositório Institucional da UFRGS
Texto Completo: http://hdl.handle.net/10183/235191
Resumo: The prompt production of the charm baryon Λ+c and the Λ+c/D0 production ratios were measured at midrapidity with the ALICE detector in pp and p-Pb collisions at √sNN=5.02  TeV. These new measurements show a clear decrease of the Λ+c/D0 ratio with increasing transverse momentum (pT) in both collision systems in the range 2<pT<12  GeV/c, exhibiting similarities with the light-flavor baryon-to-meson ratios p/π and Λ/K0S. At low pT, predictions that include additional color-reconnection mechanisms beyond the leading-color approximation, assume the existence of additional higher-mass charm-baryon states, or include hadronization via coalescence can describe the data, while predictions driven by charm-quark fragmentation processes measured in e+e− and e−p collisions significantly underestimate the data. The results presented in this Letter provide significant evidence that the established assumption of universality (colliding-system independence) of parton-to-hadron fragmentation is not sufficient to describe charm-baryon production in hadronic collisions at LHC energies.
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spelling Acharya, ShreyasiGay Ducati, Maria BeatrizPereira, Luis GustavoPezzi, Rafael PerettiALICE Collaboration2022-02-16T04:30:44Z20210031-9007http://hdl.handle.net/10183/235191001136789The prompt production of the charm baryon Λ+c and the Λ+c/D0 production ratios were measured at midrapidity with the ALICE detector in pp and p-Pb collisions at √sNN=5.02  TeV. These new measurements show a clear decrease of the Λ+c/D0 ratio with increasing transverse momentum (pT) in both collision systems in the range 2<pT<12  GeV/c, exhibiting similarities with the light-flavor baryon-to-meson ratios p/π and Λ/K0S. At low pT, predictions that include additional color-reconnection mechanisms beyond the leading-color approximation, assume the existence of additional higher-mass charm-baryon states, or include hadronization via coalescence can describe the data, while predictions driven by charm-quark fragmentation processes measured in e+e− and e−p collisions significantly underestimate the data. The results presented in this Letter provide significant evidence that the established assumption of universality (colliding-system independence) of parton-to-hadron fragmentation is not sufficient to describe charm-baryon production in hadronic collisions at LHC energies.application/pdfengPhysical review letters. Melville. Vol. 127, no. 20 (Nov. 2021), 202301, 13 p.Colisao de ions pesadosAceleradores de partículasColisões proton-protonΛ+c production and baryon-to-meson ratios in pp and p-Pb collisions at √sNN=5.02  TeV at the LHCEstrangeiroinfo: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:UFRGSTEXT001136789.pdf.txt001136789.pdf.txtExtracted Texttext/plain69390http://www.lume.ufrgs.br/bitstream/10183/235191/2/001136789.pdf.txt945770b62ddf05d0f290fe5b73a7b7a5MD52ORIGINAL001136789.pdfTexto completo (inglês)application/pdf331598http://www.lume.ufrgs.br/bitstream/10183/235191/1/001136789.pdf3962ea0d593ee7823fa7350ab2260951MD5110183/2351912023-11-15 04:25:34.724175oai:www.lume.ufrgs.br:10183/235191Repositório de PublicaçõesPUBhttps://lume.ufrgs.br/oai/requestopendoar:2023-11-15T06:25:34Repositório Institucional da UFRGS - Universidade Federal do Rio Grande do Sul (UFRGS)false
dc.title.pt_BR.fl_str_mv Λ+c production and baryon-to-meson ratios in pp and p-Pb collisions at √sNN=5.02  TeV at the LHC
title Λ+c production and baryon-to-meson ratios in pp and p-Pb collisions at √sNN=5.02  TeV at the LHC
spellingShingle Λ+c production and baryon-to-meson ratios in pp and p-Pb collisions at √sNN=5.02  TeV at the LHC
Acharya, Shreyasi
Colisao de ions pesados
Aceleradores de partículas
Colisões proton-proton
title_short Λ+c production and baryon-to-meson ratios in pp and p-Pb collisions at √sNN=5.02  TeV at the LHC
title_full Λ+c production and baryon-to-meson ratios in pp and p-Pb collisions at √sNN=5.02  TeV at the LHC
title_fullStr Λ+c production and baryon-to-meson ratios in pp and p-Pb collisions at √sNN=5.02  TeV at the LHC
title_full_unstemmed Λ+c production and baryon-to-meson ratios in pp and p-Pb collisions at √sNN=5.02  TeV at the LHC
title_sort Λ+c production and baryon-to-meson ratios in pp and p-Pb collisions at √sNN=5.02  TeV at the LHC
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 Colisao de ions pesados
Aceleradores de partículas
Colisões proton-proton
topic Colisao de ions pesados
Aceleradores de partículas
Colisões proton-proton
description The prompt production of the charm baryon Λ+c and the Λ+c/D0 production ratios were measured at midrapidity with the ALICE detector in pp and p-Pb collisions at √sNN=5.02  TeV. These new measurements show a clear decrease of the Λ+c/D0 ratio with increasing transverse momentum (pT) in both collision systems in the range 2<pT<12  GeV/c, exhibiting similarities with the light-flavor baryon-to-meson ratios p/π and Λ/K0S. At low pT, predictions that include additional color-reconnection mechanisms beyond the leading-color approximation, assume the existence of additional higher-mass charm-baryon states, or include hadronization via coalescence can describe the data, while predictions driven by charm-quark fragmentation processes measured in e+e− and e−p collisions significantly underestimate the data. The results presented in this Letter provide significant evidence that the established assumption of universality (colliding-system independence) of parton-to-hadron fragmentation is not sufficient to describe charm-baryon production in hadronic collisions at LHC energies.
publishDate 2021
dc.date.issued.fl_str_mv 2021
dc.date.accessioned.fl_str_mv 2022-02-16T04:30:44Z
dc.type.driver.fl_str_mv Estrangeiro
info:eu-repo/semantics/article
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dc.identifier.uri.fl_str_mv http://hdl.handle.net/10183/235191
dc.identifier.issn.pt_BR.fl_str_mv 0031-9007
dc.identifier.nrb.pt_BR.fl_str_mv 001136789
identifier_str_mv 0031-9007
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url http://hdl.handle.net/10183/235191
dc.language.iso.fl_str_mv eng
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dc.relation.ispartof.pt_BR.fl_str_mv Physical review letters. Melville. Vol. 127, no. 20 (Nov. 2021), 202301, 13 p.
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institution UFRGS
reponame_str Repositório Institucional da UFRGS
collection Repositório Institucional da UFRGS
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