Measurement of the muon charge asymmetry in p(p)over-bar -> W + X -> mu nu + X events at root s=1.96 TeV
2013 (English)In: Physical Review D, ISSN 1550-7998, Vol. 88, no 9, 091102- p.Article in journal (Refereed) Published
We present a measurement of the muon charge asymmetry from the decay of the W boson via W -> mu nu using 7: 3 fb(-1) of integrated luminosity collected with the D0 detector at the Fermilab Tevatron Collider at root s = 1.96 TeV. The muon charge asymmetry is presented in two kinematic regions in muon transverse momentum and event missing transverse energy: (p(T)(mu) > 25 GeV, E-T > 25 GeV) and (p(T)(mu) > 35 GeV, E-T > 35 GeV). The measured asymmetries are compared with theory predictions made using three parton distribution function sets. The data at p(T)(mu) > 35 GeV, E-T > 35 GeV, and larger values of vertical bar eta(mu)vertical bar favor an increased d(x)/u(x) ratio at higher values of x than is predicted.
Place, publisher, year, edition, pages
2013. Vol. 88, no 9, 091102- p.
IdentifiersURN: urn:nbn:se:uu:diva-212864DOI: 10.1103/PhysRevD.88.091102ISI: 000326825100001OAI: oai:DiVA.org:uu-212864DiVA: diva2:680052