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

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Antchev , G , Aspell , P , Atanassov , I , Avati , V , Baechler , J , Berardi , V , Berretti , M , Bossini , E , Bottigli , U , Bozzo , M , Broulim , P , Burkhardt , H , Buzzo , A , Cafagna , F S , Campanella , C E , Catanesi , M G , Csanad , M , Csorgo , T , Deile , M , De Leonardis , F , D'Orazio , A , Doubek , M , Eggert , K , Eremin , V , Ferro , F , Fiergolski , A , Garcia , F , Georgiev , V , Giani , S , Grzanka , L , Guaragnella , C , Hammerbauer , J , Heino , J , Karev , A , Kaspar , J , Kopal , J , Kundrat , V , Lami , S , Latino , G , Lauhakangas , R , Linhart , R , Lippmaa , E , Lippmaa , J , Lokajicek , M V , Naaranoja , T , Oljemark , F , Orava , R , Österberg , K , Saarikko , H , Welti , J & TOTEM Collaboration 2016 , ' Measurement of elastic pp scattering at √ s = 8 TeV in the Coulomb-nuclear interference region : determination of the rho-parameter and the total cross-section ' , European Physical Journal C. Particles and Fields , vol. 76 , no. 12 , 661 . https://doi.org/10.1140/epjc/s10052-016-4399-8

Title: Measurement of elastic pp scattering at √ s = 8 TeV in the Coulomb-nuclear interference region : determination of the rho-parameter and the total cross-section
Author: Antchev, G.; Aspell, P.; Atanassov, I.; Avati, V.; Baechler, J.; Berardi, V.; Berretti, M.; Bossini, E.; Bottigli, U.; Bozzo, M.; Broulim, P.; Burkhardt, H.; Buzzo, A.; Cafagna, F. S.; Campanella, C. E.; Catanesi, M. G.; Csanad, M.; Csorgo, T.; Deile, M.; De Leonardis, F.; D'Orazio, A.; Doubek, M.; Eggert, K.; Eremin, V.; Ferro, F.; Fiergolski, A.; Garcia, F.; Georgiev, V.; Giani, S.; Grzanka, L.; Guaragnella, C.; Hammerbauer, J.; Heino, J.; Karev, A.; Kaspar, J.; Kopal, J.; Kundrat, V.; Lami, S.; Latino, G.; Lauhakangas, R.; Linhart, R.; Lippmaa, E.; Lippmaa, J.; Lokajicek, M. V.; Naaranoja, T.; Oljemark, F.; Orava, R.; Österberg, K.; Saarikko, H.; Welti, J.; TOTEM Collaboration
Contributor: University of Helsinki, Helsinki Institute of Physics
University of Helsinki, Helsinki Institute of Physics
University of Helsinki, Helsinki Institute of Physics
University of Helsinki, Helsinki Institute of Physics
University of Helsinki, Department of Physics
University of Helsinki, Department of Physics
University of Helsinki, Department of Physics
University of Helsinki, Department of Physics
University of Helsinki, Department of Physics
Date: 2016-11-30
Language: eng
Number of pages: 21
Belongs to series: European Physical Journal C. Particles and Fields
ISSN: 1434-6044
URI: http://hdl.handle.net/10138/183643
Abstract: The TOTEM experiment at the CERN LHC has measured elastic proton-proton scattering at the centre-of-mass energy root s = 8 TeV and four-momentum transfers squared, vertical bar t vertical bar, from 6 x 10(-4) to 0.2GeV(2). Near the lower end of the t-interval the differential cross-section is sensitive to the interference between the hadronic and the electromagnetic scattering amplitudes. This article presents the elastic cross-section measurement and the constraints it imposes on the functional forms of the modulus and phase of the hadronic elastic amplitude. 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.-parameter is found to be 0.12 +/- 0.03. The results for the total hadronic cross-section are sigma(tot) = (102.9 +/- 2.3) mb and (103.0 +/- 2.3) mb for central and peripheral phase formulations, respectively. Both are consistent with previous TOTEM measurements.
Subject: INTERSECTING STORAGE-RINGS
SMALL-ANGLE PPBAR
OF-MASS ENERGY
REAL PART
ANTIPROTON PROTON
LHC ENERGY
AMPLITUDE
COLLISIONS
114 Physical sciences
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