Soft pomeron in light of the LHC correlated data
Autor(a) principal: | |
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Data de Publicação: | 2021 |
Outros Autores: | , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Institucional da UFRGS |
Texto Completo: | http://hdl.handle.net/10183/219616 |
Resumo: | The LHC has released precise measurements of elastic proton-proton scattering that provide a unique constraint on the asymptotic behavior of the scattering amplitude at high energies. Recent reanalyses of part of these data indicate that the central values of some forward quantities would be different than initially observed. We introduce correlation information between the original and the reanalyzed data sets in a way suitable for a global fitting analysis of all data. The careful treatment of correlated errors leads to much less stringent limits on the ρ uncertainty and sets up the stage for describing the forward data using a scattering amplitude dominated by only crossing-even terms. In the light of these correlated data, we determine the parameters of the soft Pomeron from the Regge theory. We use Born-level and eikonalized amplitudes. In the Born-level case, we estimate the contribution of the double Pomeron exchange, while in the latter case we investigate the role of the eikonalization in both the one- and two-channel models. The role of the proton-Pomeron vertex form and of the nearest t -channel singularity in the Pomeron trajectory receives particular attention. We discuss the implications of our results and present predictions for the total cross section and the ρ parameter in proton-proton collisions at LHC and cosmic ray energies. |
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Rocha, Mateus Broilo daFagundes, Daniel AlmeidaLuna, Emerson Gustavo de SouzaPeláez, Marcela2021-04-08T04:17:41Z20210556-2821http://hdl.handle.net/10183/219616001123240The LHC has released precise measurements of elastic proton-proton scattering that provide a unique constraint on the asymptotic behavior of the scattering amplitude at high energies. Recent reanalyses of part of these data indicate that the central values of some forward quantities would be different than initially observed. We introduce correlation information between the original and the reanalyzed data sets in a way suitable for a global fitting analysis of all data. The careful treatment of correlated errors leads to much less stringent limits on the ρ uncertainty and sets up the stage for describing the forward data using a scattering amplitude dominated by only crossing-even terms. In the light of these correlated data, we determine the parameters of the soft Pomeron from the Regge theory. We use Born-level and eikonalized amplitudes. In the Born-level case, we estimate the contribution of the double Pomeron exchange, while in the latter case we investigate the role of the eikonalization in both the one- and two-channel models. The role of the proton-Pomeron vertex form and of the nearest t -channel singularity in the Pomeron trajectory receives particular attention. We discuss the implications of our results and present predictions for the total cross section and the ρ parameter in proton-proton collisions at LHC and cosmic ray energies.application/pdfengPhysical Review. D, Particles and fields. Woodbury. Vol. 103, no. 1 (Jan. 2021), 014019, 15 p.PomeronsEspalhamento proton protonColisões proton-protonSoft pomeron in light of the LHC correlated dataEstrangeiroinfo: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:UFRGSTEXT001123240.pdf.txt001123240.pdf.txtExtracted Texttext/plain56817http://www.lume.ufrgs.br/bitstream/10183/219616/2/001123240.pdf.txt038ed441185c8a50caf8ef0487a36477MD52ORIGINAL001123240.pdfTexto completo (inglês)application/pdf848560http://www.lume.ufrgs.br/bitstream/10183/219616/1/001123240.pdfebe437e1a07cede30b94a8269007b5cfMD5110183/2196162023-05-21 03:28:15.35298oai:www.lume.ufrgs.br:10183/219616Repositório de PublicaçõesPUBhttps://lume.ufrgs.br/oai/requestopendoar:2023-05-21T06:28:15Repositório Institucional da UFRGS - Universidade Federal do Rio Grande do Sul (UFRGS)false |
dc.title.pt_BR.fl_str_mv |
Soft pomeron in light of the LHC correlated data |
title |
Soft pomeron in light of the LHC correlated data |
spellingShingle |
Soft pomeron in light of the LHC correlated data Rocha, Mateus Broilo da Pomerons Espalhamento proton proton Colisões proton-proton |
title_short |
Soft pomeron in light of the LHC correlated data |
title_full |
Soft pomeron in light of the LHC correlated data |
title_fullStr |
Soft pomeron in light of the LHC correlated data |
title_full_unstemmed |
Soft pomeron in light of the LHC correlated data |
title_sort |
Soft pomeron in light of the LHC correlated data |
author |
Rocha, Mateus Broilo da |
author_facet |
Rocha, Mateus Broilo da Fagundes, Daniel Almeida Luna, Emerson Gustavo de Souza Peláez, Marcela |
author_role |
author |
author2 |
Fagundes, Daniel Almeida Luna, Emerson Gustavo de Souza Peláez, Marcela |
author2_role |
author author author |
dc.contributor.author.fl_str_mv |
Rocha, Mateus Broilo da Fagundes, Daniel Almeida Luna, Emerson Gustavo de Souza Peláez, Marcela |
dc.subject.por.fl_str_mv |
Pomerons Espalhamento proton proton Colisões proton-proton |
topic |
Pomerons Espalhamento proton proton Colisões proton-proton |
description |
The LHC has released precise measurements of elastic proton-proton scattering that provide a unique constraint on the asymptotic behavior of the scattering amplitude at high energies. Recent reanalyses of part of these data indicate that the central values of some forward quantities would be different than initially observed. We introduce correlation information between the original and the reanalyzed data sets in a way suitable for a global fitting analysis of all data. The careful treatment of correlated errors leads to much less stringent limits on the ρ uncertainty and sets up the stage for describing the forward data using a scattering amplitude dominated by only crossing-even terms. In the light of these correlated data, we determine the parameters of the soft Pomeron from the Regge theory. We use Born-level and eikonalized amplitudes. In the Born-level case, we estimate the contribution of the double Pomeron exchange, while in the latter case we investigate the role of the eikonalization in both the one- and two-channel models. The role of the proton-Pomeron vertex form and of the nearest t -channel singularity in the Pomeron trajectory receives particular attention. We discuss the implications of our results and present predictions for the total cross section and the ρ parameter in proton-proton collisions at LHC and cosmic ray energies. |
publishDate |
2021 |
dc.date.accessioned.fl_str_mv |
2021-04-08T04:17:41Z |
dc.date.issued.fl_str_mv |
2021 |
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/10183/219616 |
dc.identifier.issn.pt_BR.fl_str_mv |
0556-2821 |
dc.identifier.nrb.pt_BR.fl_str_mv |
001123240 |
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0556-2821 001123240 |
url |
http://hdl.handle.net/10183/219616 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.ispartof.pt_BR.fl_str_mv |
Physical Review. D, Particles and fields. Woodbury. Vol. 103, no. 1 (Jan. 2021), 014019, 15 p. |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
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application/pdf |
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