Počet záznamů: 1

Precise study of the Z/gamma* boson transverse momentum distribution in ppbar collisions using a novel technique

  1. 1.
    0367622 - FZU-D 2013 RIV US eng J - Článek v odborném periodiku
    Abazov, V. M. - Abbott, B. - Abolins, M. - Kupčo, Alexander - Lokajíček, Miloš
    Precise study of the Z/gamma* boson transverse momentum distribution in ppbar collisions using a novel technique.
    Physical Review Letters. Roč. 106, č. 12 (2011), "122001-1"-"122001-7" ISSN 0031-9007
    Grant CEP: GA MŠk LA08047
    Výzkumný záměr: CEZ:AV0Z10100502
    Klíčová slova: Tevatron * D0 * Z0 * photon * lepton * dilepton
    Kód oboru RIV: BF - Elementární částice a fyzika vys. energií
    Impakt faktor: 7.370, rok: 2011

    Using 7.3 fb(-1) of p (p) over bar collisions collected by the D0 detector at the Fermilab Tevatron, we measure the distribution of the variable phi(eta)*, which probes the same physical effects as the Z/gamma* boson transverse momentum, but is less susceptible to the effects of experimental resolution and efficiency. A QCD prediction is found to describe the general features of the phi(eta)* distribution, but is unable to describe its detailed shape or dependence on boson rapidity. A prediction that includes a broadening of transverse momentum for small values of the parton momentum fraction is strongly disfavored.
    Trvalý link: http://hdl.handle.net/11104/0202224