Total π + p cross section extracted from the leading neutron spectra at the LHC

Khoze, V. A.; Martin, A. D.; Ryskin, M. G.

doi:10.1103/physrevd.96.034018

Total π + p cross section extracted from the leading neutron spectra at the LHC

Khoze, V. A.; Martin, A. D.; Ryskin, M. G.

Authors

V. A. Khoze

A. D. Martin

M. G. Ryskin

Abstract

We use the very forward neutron energy spectra measured by the LHC forward experiment at 7 TeV to extract the πþp total cross section at center-of-mass energies in the range 2.3–3.5 TeV. To do this, we have to first isolate the π-exchange pole in forward neutron production in pp collisions, by evaluating other possible contributions, namely, those from ρ and a2 exchange, from both eikonal and enhanced screening effects, from migration, from neutron production by Δ-isobar decay and from diffractive nucleon excitations. We discuss the possible theoretical uncertainties due to the fact that the data do not exactly reach the π pole. We choose the kinematical domain where the pion contribution dominates and demonstrate the role of the different corrections which could affect the final result.

Citation

Khoze, V., Martin, A., & Ryskin, M. (2017). Total π + p cross section extracted from the leading neutron spectra at the LHC. Physical Review D, 96(3), Article 034018. https://doi.org/10.1103/physrevd.96.034018

Journal Article Type	Article
Acceptance Date	May 17, 2017
Online Publication Date	Aug 22, 2017
Publication Date	Aug 22, 2017
Deposit Date	Oct 10, 2017
Publicly Available Date	Oct 10, 2017
Journal	Physical Review D
Print ISSN	2470-0010
Electronic ISSN	2470-0029
Publisher	American Physical Society
Peer Reviewed	Peer Reviewed
Volume	96
Issue	3
Article Number	034018
DOI	https://doi.org/10.1103/physrevd.96.034018

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Copyright Statement
Reprinted with permission from the American Physical Society: Khoze, V. A., Martin, A. D. & Ryskin, M. G. (2017). Total π + p cross section extracted from the leading neutron spectra at the LHC. Physical Review D 96(3): 034018 © 2017 by the American Physical Society. Readers may view, browse, and/or download material for temporary copying purposes only, provided these uses are for noncommercial personal purposes. Except as provided by law, this material may not be further reproduced, distributed, transmitted, modified, adapted, performed, displayed, published, or sold in whole or part, without prior written permission from the American Physical Society.