Proton-proton forward scattering at the LHC
Recently the TOTEM experiment at the LHC has released measurements at s=13 TeV of the proton-proton total cross section, σtot, and the ratio of the real to imaginary parts of the forward elastic amplitude, ρ. Since then an intense debate on the C-parity asymptotic nature of the scattering amplitude...
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doaj-5cf4f7c9bbb24923881df66db8ae2f5b2020-11-24T22:05:44ZengElsevierPhysics Letters B0370-26932019-12-01799Proton-proton forward scattering at the LHCM. Broilo0D.A. Fagundes1E.G.S. Luna2M.J. Menon3Instituto de Física e Matemática, Universidade Federal de Pelotas, 96010-900, Pelotas, RS, Brazil; Instituto de Física, Universidade Federal do Rio Grande do Sul, Caixa Postal 15051, 91501-970, Porto Alegre, RS, BrazilDepartamento de Ciências Exatas e Educação, Universidade Federal de Santa Catarina - Campus Blumenau, 89065-300, Blumenau, SC, BrazilInstituto de Física, Universidade Federal do Rio Grande do Sul, Caixa Postal 15051, 91501-970, Porto Alegre, RS, Brazil; Instituto de Física, Facultad de Ingeniería, Universidad de la República, J.H. y Reissig 565, 11000 Montevideo, Uruguay; Corresponding author.Instituto de Física Gleb Wataghin, Universidade Estadual de Campinas, 13083-859, Campinas, SP, BrazilRecently the TOTEM experiment at the LHC has released measurements at s=13 TeV of the proton-proton total cross section, σtot, and the ratio of the real to imaginary parts of the forward elastic amplitude, ρ. Since then an intense debate on the C-parity asymptotic nature of the scattering amplitude was initiated. We examine the proton-proton and the antiproton-proton forward data above 10 GeV in the context of an eikonal QCD-based model, where nonperturbative effects are readily included via a QCD effective charge. We show that, despite an overall satisfactory description of the forward data is obtained by a model in which the scattering amplitude is dominated by only crossing-even elastic terms, there is evidence that the introduction of a crossing-odd term may improve the agreement with the measurements of ρ at s=13 TeV. In the Regge language the dominant even(odd)-under-crossing object is the so called Pomeron (Odderon). Keywords: Other nonperturbative calculations, Elastic scattering, Total cross-sectionshttp://www.sciencedirect.com/science/article/pii/S0370269319307695 |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
M. Broilo D.A. Fagundes E.G.S. Luna M.J. Menon |
spellingShingle |
M. Broilo D.A. Fagundes E.G.S. Luna M.J. Menon Proton-proton forward scattering at the LHC Physics Letters B |
author_facet |
M. Broilo D.A. Fagundes E.G.S. Luna M.J. Menon |
author_sort |
M. Broilo |
title |
Proton-proton forward scattering at the LHC |
title_short |
Proton-proton forward scattering at the LHC |
title_full |
Proton-proton forward scattering at the LHC |
title_fullStr |
Proton-proton forward scattering at the LHC |
title_full_unstemmed |
Proton-proton forward scattering at the LHC |
title_sort |
proton-proton forward scattering at the lhc |
publisher |
Elsevier |
series |
Physics Letters B |
issn |
0370-2693 |
publishDate |
2019-12-01 |
description |
Recently the TOTEM experiment at the LHC has released measurements at s=13 TeV of the proton-proton total cross section, σtot, and the ratio of the real to imaginary parts of the forward elastic amplitude, ρ. Since then an intense debate on the C-parity asymptotic nature of the scattering amplitude was initiated. We examine the proton-proton and the antiproton-proton forward data above 10 GeV in the context of an eikonal QCD-based model, where nonperturbative effects are readily included via a QCD effective charge. We show that, despite an overall satisfactory description of the forward data is obtained by a model in which the scattering amplitude is dominated by only crossing-even elastic terms, there is evidence that the introduction of a crossing-odd term may improve the agreement with the measurements of ρ at s=13 TeV. In the Regge language the dominant even(odd)-under-crossing object is the so called Pomeron (Odderon). Keywords: Other nonperturbative calculations, Elastic scattering, Total cross-sections |
url |
http://www.sciencedirect.com/science/article/pii/S0370269319307695 |
work_keys_str_mv |
AT mbroilo protonprotonforwardscatteringatthelhc AT dafagundes protonprotonforwardscatteringatthelhc AT egsluna protonprotonforwardscatteringatthelhc AT mjmenon protonprotonforwardscatteringatthelhc |
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1725824969052520448 |