A new approach to modelling elastic and inelastic photon-initiated production at the LHC: SuperChic 4

Harland-Lang, L.A.; Tasevsky, M.; Khoze, V.A.; Ryskin, M.G.

doi:10.1140/epjc/s10052-020-08455-0

A new approach to modelling elastic and inelastic photon-initiated production at the LHC: SuperChic 4

Harland-Lang, L.A.; Tasevsky, M.; Khoze, V.A.; Ryskin, M.G.

Authors

L.A. Harland-Lang

M. Tasevsky

V.A. Khoze

M.G. Ryskin

Abstract

We present the results of the new SuperChic 4 Monte Carlo implementation of photon-initiated production in proton–proton collisions, considering as a first example the case of lepton pair production. This is based on the structure function calculation of the underlying process, and focusses on a complete account of the various contributing channels, including the case where a rapidity gap veto is imposed. We provide a careful treatment of the contributions where either (single dissociation), both (double dissociation) or neither (elastic) proton interacts inelastically and dissociates, and interface our results to Pythia for showering and hadronization. The particle decay distribution from dissociation system, as well the survival probability for no additional proton–proton interactions, are both fully accounted for; these are essential for comparing to data where a rapidity gap veto is applied. We present detailed results for the impact of the veto requirement on the differential cross section, compare to and find good agreement with ATLAS 7 TeV data on semi-exclusive production, and provide a new precise evaluation of the background from semi-exclusive lepton pair production to SUSY particle production in compressed mass scenarios, which is found to be low.

Citation

Harland-Lang, L., Tasevsky, M., Khoze, V., & Ryskin, M. (2020). A new approach to modelling elastic and inelastic photon-initiated production at the LHC: SuperChic 4. The European Physical Journal C, 80(10), Article 925. https://doi.org/10.1140/epjc/s10052-020-08455-0

Journal Article Type	Article
Acceptance Date	Sep 8, 2020
Online Publication Date	Oct 7, 2020
Publication Date	2020-10
Deposit Date	Oct 22, 2020
Publicly Available Date	Oct 23, 2020
Journal	European Physical Journal C: Particles and Fields
Print ISSN	1434-6044
Electronic ISSN	1434-6052
Publisher	SpringerOpen
Peer Reviewed	Peer Reviewed
Volume	80
Issue	10
Article Number	925
DOI	https://doi.org/10.1140/epjc/s10052-020-08455-0

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