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High Energy Physics - Experiment

arXiv:1602.00219 (hep-ex)
[Submitted on 31 Jan 2016]

Title:Evidence for Non-Exponential Differential Cross-Section of pp Elastic Scattering at Low |t| and $\sqrt{s}$ = 8 TeV by TOTEM

Authors:T. Csörgő (for the TOTEM Collaboration)
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Abstract:Recently published and preliminary results of the TOTEM experiment are presented, emphasizing a recent discovery of a non-exponential behaviour of the differential cross-section of elastic proton-proton scattering, that TOTEM measured with an unprecedented precision at the centre-of-mass energy $\sqrt{s}$ = 8 TeV based on a high-statistics data sample obtained with the $\beta_* = 90$ m optics of CERN LHC. Both the statistical and systematic uncertainties remained below 1%, except for the t-independent contribution from the overall normalisation. This measurement allowed TOTEM to exclude a purely exponential differential cross-section in the range of four-momentum transfer squared 0.027 < |t| < 0.2 GeV$^2$ with a significance greater than 7 $\sigma$. In this context we also highlight the innovative TOTEM recalibration of LHC optics, that used elastic scattering data measured by the world's largest and most complex Roman Pot detector system, and discuss recent preliminary TOTEM data on the Coulomb-Nuclear interference region with its physics implications.
Comments: 6 pages, 3 figures, invited talk presented at the XLV International Symposium on Multiparticle Dynamics, Wildbad Kreuth, Germany, October 4-9, 2015
Subjects: High Energy Physics - Experiment (hep-ex); High Energy Physics - Phenomenology (hep-ph)
Cite as: arXiv:1602.00219 [hep-ex]
  (or arXiv:1602.00219v1 [hep-ex] for this version)
  https://doi.org/10.48550/arXiv.1602.00219

Submission history

From: Tamas Csörgő [view email]
[v1] Sun, 31 Jan 2016 10:32:46 UTC (331 KB)
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