Evidence for non-exponential elastic proton proton differential cross-section at low vertical bar t vertical bar and √ s = 8 TeV by TOTEM

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Antchev , G , Garcia , F , Heino , J , Lauhakangas , R , Naaranoja , T , Oljemark , F , Orava , R , Österberg , K , Saarikko , H , Welti , J & TOTEM Collaboration 2015 , ' Evidence for non-exponential elastic proton proton differential cross-section at low vertical bar t vertical bar and √ s = 8 TeV by TOTEM ' , Nuclear Physics, Section B , vol. 899 , pp. 527-546 . https://doi.org/10.1016/j.nuclphysb.2015.08.010

Title: Evidence for non-exponential elastic proton proton differential cross-section at low vertical bar t vertical bar and √ s = 8 TeV by TOTEM
Author: Antchev, G.; Garcia, F.; Heino, J.; Lauhakangas, R.; Naaranoja, T.; Oljemark, F.; Orava, R.; Österberg, K.; Saarikko, H.; Welti, J.; TOTEM Collaboration
Contributor organization: Helsinki Institute of Physics
Department of Physics
Date: 2015-10
Language: eng
Number of pages: 20
Belongs to series: Nuclear Physics, Section B
ISSN: 0550-3213
DOI: https://doi.org/10.1016/j.nuclphysb.2015.08.010
URI: http://hdl.handle.net/10138/159033
Abstract: The TOTEM experiment has made a precise measurement of the elastic proton proton differential cross-section at the centre-of-mass energy root s = 8 TeV based on a high-statistics data sample obtained with the beta* = 90 m optics. Both the statistical and systematic uncertainties remain below 1%, except for the t-independent contribution from the overall normalisation. This unprecedented precision allows to exclude a purely exponential differential cross-section in the range of four-momentum transfer squared 0.027 <vertical bar t vertical bar <0.2 GeV2 with a significance greater than 7 sigma. Two extended parametrisations, with quadratic and cubic polynomials in the exponent, are shown to be well compatible with the data. Using them for the differential cross-section extrapolation to t = 0, and further applying the optical theorem, yields total cross-section estimates of (101.5 +/- 2.1) mb and (101.9 +/- 2.1) mb, respectively, in agreement with previous TOTEM measurements. (C) 2015 The Authors. Published by Elsevier B.V.
Subject: SCATTERING
COLLISIONS
ENERGIES
114 Physical sciences
Peer reviewed: Yes
Rights: cc_by
Usage restriction: openAccess
Self-archived version: publishedVersion


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