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Double hard scattering without double counting

The journal of high energy physics, 2017-06, Vol.2017 (6), p.1-79, Article 83 [Peer Reviewed Journal]

The Author(s) 2017 ;Journal of High Energy Physics is a copyright of Springer, 2017. ;ISSN: 1029-8479 ;EISSN: 1029-8479 ;DOI: 10.1007/JHEP06(2017)083

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Title:
Double hard scattering without double counting
Author: Diehl, Markus ; Gaunt, Jonathan R. ; Schönwald, Kay
Subjects: Accuracy ; Classical and Quantum Gravitation ; Collisions ; Double taxation ; Elementary Particles ; Mathematical analysis ; Partons ; Perturbation methods ; Perturbation theory ; Physics ; Physics and Astronomy ; QCD Phenomenology ; Quantum Field Theories ; Quantum Field Theory ; Quantum Physics ; Regular Article - Theoretical Physics ; Relativity Theory ; Scattering ; Splitting ; State taxes ; String Theory
Is Part Of: The journal of high energy physics, 2017-06, Vol.2017 (6), p.1-79, Article 83
Description: A bstract Double parton scattering in proton-proton collisions includes kinematic regions in which two partons inside a proton originate from the perturbative splitting of a single parton. This leads to a double counting problem between single and double hard scattering. We present a solution to this problem, which allows for the definition of double parton distributions as operator matrix elements in a proton, and which can be used at higher orders in perturbation theory. We show how the evaluation of double hard scattering in this framework can provide a rough estimate for the size of the higher-order contributions to single hard scattering that are affected by double counting. In a numeric study, we identify situations in which these higher-order contributions must be explicitly calculated and included if one wants to attain an accuracy at which double hard scattering becomes relevant, and other situations where such contributions may be neglected.
Publisher: Berlin/Heidelberg: Springer Berlin Heidelberg
Language: English
Identifier: ISSN: 1029-8479
EISSN: 1029-8479
DOI: 10.1007/JHEP06(2017)083
Source: DOAJ : Directory of Open Access Journals
SpringerOpen
ProQuest Central

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Double hard scattering without double counting

The Author(s) 2017 ;Journal of High Energy Physics is a copyright of Springer, 2017. ;ISSN: 1029-8479 ;EISSN: 1029-8479 ;DOI: 10.1007/JHEP06(2017)083

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