RT Journal Article
T1 Scaling properties of inclusive W ± production at hadron colliders
A1 Arleo, François
A1 Chapon, Émilien
A1 Paukkunen, Hannu
AB We consider the hadroproduction of W gauge bosons in their leptonic decay mode. Starting from the leading-order expressions, we show that by defining a suitable scaling variable the centre-of-mass dependence of the cross sections at the LHC energies can be essentially described by a simple power law. The scaling exponent is directly linked to the small-x behaviour of parton distribution functions (PDF) which, at the high virtualities involved in W production, is largely dictated by QCD evolution equations. This entails a particularly simple scaling law for the lepton charge asymmetry and also predicts that measurements in different collision systems (p–p, p–  p¯¯¯p¯ , p–Pb Pb–Pb) are straightforwardly related. The expectations are compared with the existing data and a very good overall agreement is observed. It is shown that the PDF uncertainty in certain cross-section ratios between nearby centre-of-mass energies can be significantly reduced by taking the ratios at fixed value of the scaling variable instead of fixed rapidity
PB Springer
SN 1434-6044
YR 2016
FD 2016-04-18
LK http://hdl.handle.net/10347/16324
UL http://hdl.handle.net/10347/16324
LA eng
NO Arleo, F., Chapon, É. & Paukkunen, H. Eur. Phys. J. C (2016) 76: 214. https://doi.org/10.1140/epjc/s10052-016-4049-1
NO The work of ÉC is supported by the European Research Council, under the “QuarkGluonPlasmaCMS” #259612 grant
DS Minerva
RD 30 abr 2026