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High Energy Physics - Phenomenology

arXiv:1512.09113 (hep-ph)
[Submitted on 30 Dec 2015 (v1), last revised 11 Mar 2016 (this version, v3)]

Title:Two-photon exchange correction to muon-proton elastic scattering at low momentum transfer

Authors:O. Tomalak, M. Vanderhaeghen (JGU Mainz)
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Abstract:We evaluate the two-photon exchange (TPE) correction to the muon-proton elastic scattering at small momentum transfer. Besides the elastic (nucleon) intermediate state contribution, which is calculated exactly, we account for the inelastic intermediate states by expressing the TPE process approximately through the forward doubly virtual Compton scattering. The input in our evaluation is given by the unpolarized proton structure functions and by one subtraction function. For the latter, we provide an explicit evaluation based on a Regge fit of high-energy proton structure function data. It is found that, for the kinematics of the forthcoming muon-proton elastic scattering data of the MUSE experiment, the elastic TPE contribution dominates, and the size of the inelastic TPE contributions is within the anticipated error of the forthcoming data.
Comments: 33 pages, 15 figures, version published in Eur. Phys. J. C 76, no. 3, 125 (2016)
Subjects: High Energy Physics - Phenomenology (hep-ph); Nuclear Experiment (nucl-ex); Nuclear Theory (nucl-th)
Cite as: arXiv:1512.09113 [hep-ph]
  (or arXiv:1512.09113v3 [hep-ph] for this version)
  https://doi.org/10.48550/arXiv.1512.09113
Journal reference: Eur. Phys. J. C 76, no. 3, 125 (2016)
Related DOI: https://doi.org/10.1140/epjc/s10052-016-3966-3

Submission history

From: Oleksandr Tomalak [view email]
[v1] Wed, 30 Dec 2015 20:42:35 UTC (1,043 KB)
[v2] Mon, 4 Jan 2016 16:31:18 UTC (1,043 KB)
[v3] Fri, 11 Mar 2016 15:44:54 UTC (1,043 KB)
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