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 - Článek v odborném periodiku
Antchev, G. - Aspell, P. - Atanassov, I. - Kašpar, Jan - Kopal, Josef - Kundrát, Vojtěch - Lokajíček, Miloš V. - Procházka, Jiří … celkem 89 autorů
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
Institucionální podpora: RVO:68378271
Klíčová slova: elastic pp scattering * Coulomb-nuclear interference
Kód oboru RIV: BF - Elementární částice a fyzika vys. energií
Impakt faktor: 5.297, rok: 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.

Trvalý link: http://hdl.handle.net/11104/0268301