Measurement of elastic pp scattering at √s = 8TeV in the Coulomb-nuclear interference region – determination of the ρ-parameter and the total cross-section

0470721 - FZÚ 2017 RIV US eng J - Journal Article
Antchev, G. - Aspell, P. - Atanassov, I. - Kašpar, Jan - Kopal, Josef - Kundrát, Vojtěch - Lokajíček, Miloš V. - Procházka, Jiří … Total 89 authors
Measurement of elastic pp scattering at √s = 8TeV in the Coulomb-nuclear interference region – determination of the ρ-parameter and the total cross-section.
European Physical Journal C. Roč. 76, č. 12 (2016), s. 1-21, č. článku 661. ISSN 1434-6044. E-ISSN 1434-6052
Institutional support: RVO:68378271
Keywords : elastic pp scattering * Coulomb-nuclear interference
Subject RIV: BF - Elementary Particles and High Energy Physics
Impact factor: 5.297, year: 2016

The TOTEM experiment at the CERN LHC has measured elastic proton-proton scattering at the centre-of-mass energy √s = 8 TeV and four-momentum transfers squared, |t|, from 6×10^(−4) GeV^2 to 0.2 GeV^2. The data exclude the traditional Simplified West and Yennie interference formula that requires a constant phase and a purely exponential modulus of the hadronic amplitude. For parametrisations of the hadronic modulus with second- or third-order polynomials in the exponent, the data are compatible with hadronic phase functions giving either central or peripheral behaviour in the impact parameter picture of elastic scattering. In both cases, the ρ-parameter is found to be 0.12±0.03. The results for the total hadronic cross-section are σtot =(102.9±2.3) mb and (103.0±2.3) mb for central and peripheral phase formulations, respectively.

Permanent Link: http://hdl.handle.net/11104/0268301