Measurement of sigma(ppbar -> Z + X) Br(Z -> tau+tau-) at sqrt(s)=1.96 TeV

0335018 - FZÚ 2010 RIV NL eng J - Journal Article
Abazov, V. M. - Abbott, B. - Abolins, M. - Kupčo, Alexander - Lokajíček, Miloš … Total 519 authors
Measurement of sigma(ppbar -> Z + X) Br(Z -> tau+tau-) at sqrt(s)=1.96 TeV.
[Měření účinného průřezu p(p)over-bar -> Z plus X)Br(Z -> tau(+)tau(-)) při těžišťové energii 1.96 TeV.]
Physics Letters. B. Roč. 670, 4-5 (2009), s. 292-299. ISSN 0370-2693. E-ISSN 1873-2445
R&D Projects: GA MŠMT LC527; GA MŠMT LA08047
Institutional research plan: CEZ:AV0Z10100502
Keywords : D0 * Z boson * tau lepton * neutrino
Subject RIV: BF - Elementary Particles and High Energy Physics
Impact factor: 5.083, year: 2009
http://www.sciencedirect.com/science?_ob=ArticleURL&_udi=B6TVN-4TW6HN7-3&_user=625012&_rdoc=1&_fmt=&_orig=search&_sort=d&_docanchor=&view=c&_acct=C000

We present a measurement of the cross section for Z boson production times the branching fraction to tau lepton pairs sigma(ppbar -> Z + X) Br(Z -> tau+ tau-) in proton-antiproton collisions at center of mass energy 1.96 TeV. The measurement is performed in the channel in which one tau lepton decays into a muon and neutrinos, and the other tau lepton decays hadronically or into an electron and neutrinos. The data sample corresponds to an integrated luminosity of 1.0 inverse fb collected with the D0 detector at the Fermilab Tevatron Collider. The sample contains 1511 candidate events with an estimated 20% background from jets or muons misidentified as tau leptons. We obtain sigma Br = 240 +/- 8 (stat) +/- 12 (sys) +/- 15 (lum) pb, which is consistent with the standard model prediction.

Prezentujeme výsledky měření účinného průřezu produkce Z bosonu rozpadajícího se na pár tau leptonů v proton antiprotonových srážkách při těžišťové energii 1.96 TeV.
Permanent Link: http://hdl.handle.net/11104/0179606