6533b829fe1ef96bd128a5e5
RESEARCH PRODUCT
Features of W production in p-p, p-Pb and Pb-Pb collisions
Emilien ChaponFrançois ArleoHannu Paukkunensubject
heavy ion: scatteringHadronPb-Pb collisionsPartonElementary particle02 engineering and technologycomputer.software_genrePower lawHigh Energy Physics - ExperimentHigh Energy Physics - Experiment (hep-ex)background: lowHigh Energy Physics - Phenomenology (hep-ph)0202 electrical engineering electronic engineering information engineering[PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex]050107 human factorsBosonQuantum chromodynamicsPhysicsDatabasehigher-order: 0Hadronic collisionsCharge asymmetries05 social sciencesscalinghep-phCharged leptonsHigh Energy Physics - PhenomenologyCERN LHC CollParticle Physics - ExperimentQuarkInelastic scatteringParticle physicssmall-xquark: distribution functionp p: scatteringFOS: Physical sciencesW: decay114 Physical sciencesenergy dependence[ PHYS.HEXP ] Physics [physics]/High Energy Physics - Experiment [hep-ex]W: productionquantum chromodynamicsanti-p p: scatteringCollision systems0501 psychology and cognitive sciencesHigh energy physicsp nucleus: scatteringBosonsParticle Physics - Phenomenologyhep-exlepton: charge: asymmetryfactorization: collinearHigh Energy Physics::PhenomenologyElementary particlesScaling exponent Lead alloys020207 software engineeringBinary alloysW bosonsLeading ordersrapidityevolution equation[PHYS.HPHE]Physics [physics]/High Energy Physics - Phenomenology [hep-ph][ PHYS.HPHE ] Physics [physics]/High Energy Physics - Phenomenology [hep-ph]High Energy Physics::Experimentcomputerhigh-energy hadronic collisionsLead Center-of-mass energiesLeptondescription
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.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2017-04-03 |