Enhanced deuteron coalescence probability in jets
Autor(a) principal: | |
---|---|
Data de Publicação: | 2023 |
Outros Autores: | , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Institucional da UFRGS |
Texto Completo: | http://hdl.handle.net/10183/270804 |
Resumo: | The transverse-momentum (pT) spectra and coalescence parameters B2 of (anti)deuterons are measured in p-p collisions at ffiffi s p ¼ 13 TeV for the first time in and out of jets. In this measurement, the direction of the leading particle with the highest pT in the event (plead T > 5 GeV=c) is used as an approximation for the jet axis. The event is consequently divided into three azimuthal regions, and the jet signal is obtained as the difference between the toward region, that contains jet fragmentation products in addition to the underlying event (UE), and the transverse region, which is dominated by the UE. The coalescence parameter in the jet is found to be approximately a factor of 10 larger than that in the underlying event. This experimental observation is consistent with the coalescence picture and can be attributed to the smaller average phasespace distance between nucleons in the jet cone as compared with the underlying event. The results presented in this Letter are compared to predictions from a simple nucleon coalescence model, where the phase-space distributions of nucleons are generated using PYTHIA8 with the Monash 2013 tuning, and to predictions from a deuteron production model based on ordinary nuclear reactions with parametrized energy-dependent cross sections tuned on data. The latter model is implemented in PYTHIA8.3. Both models reproduce the observed large difference between in-jet and out-of-jet coalescence parameters, although the almost flat trend of the BJet 2 is not reproduced by the models, which instead give a decreasing trend. |
id |
UFRGS-2_235889bcc249779fd383e8714da7376c |
---|---|
oai_identifier_str |
oai:www.lume.ufrgs.br:10183/270804 |
network_acronym_str |
UFRGS-2 |
network_name_str |
Repositório Institucional da UFRGS |
repository_id_str |
|
spelling |
Acharya, ShreyasiGay Ducati, Maria BeatrizPereira, Luis GustavoALICE Collaboration2024-01-10T03:37:06Z20230031-9007http://hdl.handle.net/10183/270804001188092The transverse-momentum (pT) spectra and coalescence parameters B2 of (anti)deuterons are measured in p-p collisions at ffiffi s p ¼ 13 TeV for the first time in and out of jets. In this measurement, the direction of the leading particle with the highest pT in the event (plead T > 5 GeV=c) is used as an approximation for the jet axis. The event is consequently divided into three azimuthal regions, and the jet signal is obtained as the difference between the toward region, that contains jet fragmentation products in addition to the underlying event (UE), and the transverse region, which is dominated by the UE. The coalescence parameter in the jet is found to be approximately a factor of 10 larger than that in the underlying event. This experimental observation is consistent with the coalescence picture and can be attributed to the smaller average phasespace distance between nucleons in the jet cone as compared with the underlying event. The results presented in this Letter are compared to predictions from a simple nucleon coalescence model, where the phase-space distributions of nucleons are generated using PYTHIA8 with the Monash 2013 tuning, and to predictions from a deuteron production model based on ordinary nuclear reactions with parametrized energy-dependent cross sections tuned on data. The latter model is implemented in PYTHIA8.3. Both models reproduce the observed large difference between in-jet and out-of-jet coalescence parameters, although the almost flat trend of the BJet 2 is not reproduced by the models, which instead give a decreasing trend.application/pdfengPhysical review letters. Melville. Vol. 131, no. 4 (July 2023), 042301, 14 p.Colisões proton-protonColisões hadrônicasAceleradores de partículasEnhanced deuteron coalescence probability in jetsEstrangeiroinfo: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:UFRGSTEXT001188092.pdf.txt001188092.pdf.txtExtracted Texttext/plain70533http://www.lume.ufrgs.br/bitstream/10183/270804/2/001188092.pdf.txt30e6b85869d5eb42d62c9759573e1bebMD52ORIGINAL001188092.pdfTexto completo (inglês)application/pdf16465626http://www.lume.ufrgs.br/bitstream/10183/270804/1/001188092.pdf9a1495c700f07b48085640a806b8af65MD5110183/2708042024-01-11 04:26:02.306358oai:www.lume.ufrgs.br:10183/270804Repositório de PublicaçõesPUBhttps://lume.ufrgs.br/oai/requestopendoar:2024-01-11T06:26:02Repositório Institucional da UFRGS - Universidade Federal do Rio Grande do Sul (UFRGS)false |
dc.title.pt_BR.fl_str_mv |
Enhanced deuteron coalescence probability in jets |
title |
Enhanced deuteron coalescence probability in jets |
spellingShingle |
Enhanced deuteron coalescence probability in jets Acharya, Shreyasi Colisões proton-proton Colisões hadrônicas Aceleradores de partículas |
title_short |
Enhanced deuteron coalescence probability in jets |
title_full |
Enhanced deuteron coalescence probability in jets |
title_fullStr |
Enhanced deuteron coalescence probability in jets |
title_full_unstemmed |
Enhanced deuteron coalescence probability in jets |
title_sort |
Enhanced deuteron coalescence probability in jets |
author |
Acharya, Shreyasi |
author_facet |
Acharya, Shreyasi Gay Ducati, Maria Beatriz Pereira, Luis Gustavo ALICE Collaboration |
author_role |
author |
author2 |
Gay Ducati, Maria Beatriz Pereira, Luis Gustavo ALICE Collaboration |
author2_role |
author author author |
dc.contributor.author.fl_str_mv |
Acharya, Shreyasi Gay Ducati, Maria Beatriz Pereira, Luis Gustavo ALICE Collaboration |
dc.subject.por.fl_str_mv |
Colisões proton-proton Colisões hadrônicas Aceleradores de partículas |
topic |
Colisões proton-proton Colisões hadrônicas Aceleradores de partículas |
description |
The transverse-momentum (pT) spectra and coalescence parameters B2 of (anti)deuterons are measured in p-p collisions at ffiffi s p ¼ 13 TeV for the first time in and out of jets. In this measurement, the direction of the leading particle with the highest pT in the event (plead T > 5 GeV=c) is used as an approximation for the jet axis. The event is consequently divided into three azimuthal regions, and the jet signal is obtained as the difference between the toward region, that contains jet fragmentation products in addition to the underlying event (UE), and the transverse region, which is dominated by the UE. The coalescence parameter in the jet is found to be approximately a factor of 10 larger than that in the underlying event. This experimental observation is consistent with the coalescence picture and can be attributed to the smaller average phasespace distance between nucleons in the jet cone as compared with the underlying event. The results presented in this Letter are compared to predictions from a simple nucleon coalescence model, where the phase-space distributions of nucleons are generated using PYTHIA8 with the Monash 2013 tuning, and to predictions from a deuteron production model based on ordinary nuclear reactions with parametrized energy-dependent cross sections tuned on data. The latter model is implemented in PYTHIA8.3. Both models reproduce the observed large difference between in-jet and out-of-jet coalescence parameters, although the almost flat trend of the BJet 2 is not reproduced by the models, which instead give a decreasing trend. |
publishDate |
2023 |
dc.date.issued.fl_str_mv |
2023 |
dc.date.accessioned.fl_str_mv |
2024-01-10T03:37:06Z |
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/10183/270804 |
dc.identifier.issn.pt_BR.fl_str_mv |
0031-9007 |
dc.identifier.nrb.pt_BR.fl_str_mv |
001188092 |
identifier_str_mv |
0031-9007 001188092 |
url |
http://hdl.handle.net/10183/270804 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.ispartof.pt_BR.fl_str_mv |
Physical review letters. Melville. Vol. 131, no. 4 (July 2023), 042301, 14 p. |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
application/pdf |
dc.source.none.fl_str_mv |
reponame:Repositório Institucional da UFRGS instname:Universidade Federal do Rio Grande do Sul (UFRGS) instacron:UFRGS |
instname_str |
Universidade Federal do Rio Grande do Sul (UFRGS) |
instacron_str |
UFRGS |
institution |
UFRGS |
reponame_str |
Repositório Institucional da UFRGS |
collection |
Repositório Institucional da UFRGS |
bitstream.url.fl_str_mv |
http://www.lume.ufrgs.br/bitstream/10183/270804/2/001188092.pdf.txt http://www.lume.ufrgs.br/bitstream/10183/270804/1/001188092.pdf |
bitstream.checksum.fl_str_mv |
30e6b85869d5eb42d62c9759573e1beb 9a1495c700f07b48085640a806b8af65 |
bitstream.checksumAlgorithm.fl_str_mv |
MD5 MD5 |
repository.name.fl_str_mv |
Repositório Institucional da UFRGS - Universidade Federal do Rio Grande do Sul (UFRGS) |
repository.mail.fl_str_mv |
|
_version_ |
1801225108540358656 |