CERN Accelerating science

Article
Report number	arXiv:1709.08351
Title	Features of W production in p-p, p-Pb and Pb-Pb collisions
Related title	Features of W production in p-p, p-Pb and Pb-Pb collisions
Author(s)	Arleo, François (Ecole Polytechnique) ; Chapon, Émilien (CERN ; Ecole Polytechnique) ; Paukkunen, Hannu (Jyvaskyla U. ; Helsinki Inst. of Phys. ; Santiago de Compostela U., IGFAE)
Publication	SISSA, 2017-05-26
Imprint	2017-09-25
Number of pages	5
Note	A transcript of the talk given in XXV International Workshop on Deep-Inelastic Scattering and Related Subjects
In:	PoS DIS2017 (2018) 006
In:	25th International Workshop on Deep Inelastic Scattering and Related Topics, Birmingham, UK, 03 - 07 Apr 2017, pp.006
DOI	10.22323/1.297.0006
Subject category	hep-ex ; Particle Physics - Experiment ; hep-ph ; Particle Physics - Phenomenology
Abstract	We consider the production of inclusive W bosons in variety of high-energy hadronic collisions: p--p, p--$\overline{\rm p}$, p--Pb, and Pb--Pb. In particular, we focus on the resulting distributions of charged leptons from W decay that can be measured with relatively low backgrounds. The leading-order expressions within the collinearly factorized QCD indicate that the center-of-mass energy dependence at forward/backward rapidities should be well approximated by a simple power law. The scaling exponent is related to the small-$x$ behaviour of the quark distributions, which is largely driven by the parton evolution. An interesting consequence is the simple scaling law for the lepton charge asymmetry which relates measurements in different collision systems. The expectations are contrasted with the existing data and a very good overall agreement is found. Finally, we propose precision observables to be measured at the LHC.
Copyright/License	arXiv nonexclusive-distrib. 1.0 publication: (License: CC-BY-NC-ND-4.0)

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