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Measurement of the Normalized $Z/\gamma^*\to\mu^+\mu^-$ Transverse Momentum Distribution in $p\bar{p}$ Collisions at $\sqrt{s}=1.96$ TeV
Stockholm University, Faculty of Science, Department of Physics. (Elementarpartikelfysik)
2010 (English)In: Physics Letters B, ISSN 0370-2693, Vol. 693, no 5, 522-530 p.Article in journal (Refereed) Published
Abstract [en]

We present a new measurement of the Z/γ transverse momentum distribution in the range 0–330 GeV, in proton–antiproton collisions at . The measurement uses 0.97 fb−1 of integrated luminosity recorded by the D0 experiment and is the first using the Z/γμ+μ+X channel at this center-of-mass energy. This is also the first measurement of the Z/γ transverse momentum distribution that presents the result at the level of particles entering the detector, minimizing dependence on theoretical models. As any momentum of the Z/γ in the plane transverse to the incoming beams must be balanced by some recoiling system, primarily the result of QCD radiation in the initial state, this variable is an excellent probe of the underlying process. Tests of the predictions of QCD calculations and current event generators show they have varied success in describing the data. Using this measurement as an input to theoretical predictions will allow for a better description of hadron collider data and hence it will increase experimental sensitivity to rare signals.

Place, publisher, year, edition, pages
2010. Vol. 693, no 5, 522-530 p.
Keyword [en]
Z bosons, Differential cross section, Perturbative QCD, Event generators, Monte Carlo models
National Category
Subatomic Physics
Research subject
URN: urn:nbn:se:su:diva-47323DOI: 10.1016/j.physletb.2010.09.012ISI: 000283701300003OAI: diva2:373639
Swedish Research Council
Publikationen har totalt 445 författare, V. Abazov et al.Available from: 2010-12-01 Created: 2010-12-01 Last updated: 2011-11-21Bibliographically approved

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Åsman, Barbro
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