Determination of the strange-quark density of the proton from ATLAS measurements of the W -> lv and Z -> ll cross sections

0389670 - FZÚ 2013 RIV US eng J - Článek v odborném periodiku
Aad, G. - Abbott, B. - Abdallah, J. - Chudoba, Jiří - Gallus, Petr - Gunther, Jaroslav - Hruška, I. - Juránek, Vojtěch - Kepka, Oldřich - Kupčo, Alexander - Kůs, Vlastimil - Lokajíček, Miloš - Marčišovský, Michal - Mikeštíková, Marcela - Myška, Miroslav - Němeček, Stanislav - Panušková, M. - Růžička, Pavel - Schovancová, Jaroslava - Šícho, Petr - Staroba, Pavel - Svatoš, Michal - Taševský, Marek - Tic, Tomáš - Valenta, J. - Vrba, Václav - Zeman, Martin … celkem 3035 autorů
Determination of the strange-quark density of the proton from ATLAS measurements of the W -> lv and Z -> ll cross sections.
Physical Review Letters. Roč. 109, č. 1 (2012), "012001-1"-"012001-18". ISSN 0031-9007. E-ISSN 1079-7114
Grant CEP: GA MŠMT LA08032
Výzkumný záměr: CEZ:AV0Z10100502
Klíčová slova: ATLAS * LHC * sea quark * quark density, * Z0 hadronproduction * deep inelastic scattering * QCD * parton distribution function
Kód oboru RIV: BF - Elementární částice a fyzika vys. energií
Impakt faktor: 7.943, rok: 2012
http://arxiv.org/abs/arXiv:1203.4051

A QCD analysis is reported of ATLAS data on inclusive W and Z boson production in pp collisions at the LHC, jointly with ep deep inelastic scattering data from HERA. The ATLAS data exhibit sensitivity to the light quark sea composition and magnitude at Bjorken x ~ 0.01. Specifically, the data support the hypothesis of a symmetric composition of the light quark sea at low x. The ratio of the strange-to-down sea quark distributions is determined to be 1.00(+0.25-0.28) at absolute four-momentum transfer squared Q^2 = 1.9 GeV^2 and x = 0.023.
Trvalý link: http://hdl.handle.net/11104/0218524