Measurement of the low-mass Drell-Yan differential cross section at root s=7 TeV using the ATLAS detector
Number of Authors: 2900
2014 (English)In: Journal of High Energy Physics (JHEP), ISSN 1029-8479, E-ISSN 1126-6708, no 6, 112- p.Article in journal (Refereed) Published
The differential cross section for the process Z/gamma* -> ll (l = e, mu) as a function of dilepton invariant mass is measured in pp collisions at root s = 7 TeV at the LHC using the ATLAS detector. The measurement is performed in the e and mu channels for invariant masses between 26 GeV and 66 GeV using an integrated luminosity of 1.6 fb(-1) collected in 2011 and these measurements are combined. The analysis is extended to invariant masses as low as 12 GeV in the muon channel using 35 pb(-1) of data collected in 2010. The cross sections are determined within fiducial acceptance regions and corrections to extrapolate the measurements to the full kinematic range are provided. Next-to-next-to-leading-order QCD predictions provide a significantly better description of the results than next-to-leading-order QCD calculations, unless the latter are matched to a parton shower calculation.
Place, publisher, year, edition, pages
2014. no 6, 112- p.
IdentifiersURN: urn:nbn:se:uu:diva-231473DOI: 10.1007/JHEP06(2014)112ISI: 000338528300001OAI: oai:DiVA.org:uu-231473DiVA: diva2:744595
ATLAS Collaboration, for complete list of authors see http://dx.doi.org/10.1007/JHEP06(2014)1122014-09-082014-09-082014-12-17Bibliographically approved