Measurement of the shape of the boson-transverse momentum distribution in p(p)over-bar -> Z/gamma*-> e(+)e(-)+X events produced at root s=1.96 TeV
2008 (English)In: Physical Review Letters, ISSN 0031-9007, Vol. 100, no 10, 102002-1-102002-7 p.Article in journal (Refereed) Published
We present a measurement of the shape of the Z/gamma* boson transverse momentum (q(T)) distribution in p (p) over bar -> Z/gamma(*)-> e(+)e(-)+X events at a center-of-mass energy of 1.96 TeV using 0.98 fb(-1) of data collected with the D0 detector at the Fermilab Tevatron collider. The data are found to be consistent with the resummation prediction at low q(T), but above the perturbative QCD calculation in the region of q(T)> 30 GeV/c. Using events with q(T)< 30 GeV/c, we extract the value of g(2), one of the nonperturbative parameters for the resummation calculation. Data at large boson rapidity y are compared with the prediction of resummation and with alternative models that employ a resummed form factor with modifications in the small Bjorken x region of the proton wave function.
Place, publisher, year, edition, pages
2008. Vol. 100, no 10, 102002-1-102002-7 p.
RADIATIVE-CORRECTIONS, CROSS-SECTION, COLLISIONS, PAIRS, QCD
IdentifiersURN: urn:nbn:se:kth:diva-33177DOI: 10.1103/PhysRevLett.100.102002ISI: 000254024500013OAI: oai:DiVA.org:kth-33177DiVA: diva2:413759
QC 201104292011-04-292011-04-29Bibliographically approved