Measurement of direct photon pair production cross sections in p(p)over-bar collisions at root s=1.96 TeV

0352165 - FZÚ 2011 RIV NL eng J - Článek v odborném periodiku
Abazov, V. M. - Abbott, B. - Abolins, M. - Kupčo, Alexander - Lokajíček, Miloš
Measurement of direct photon pair production cross sections in p(p)over-bar collisions at root s=1.96 TeV.
Physics Letters. B. Roč. 690, č. 2 (2010), s. 108-117. ISSN 0370-2693. E-ISSN 1873-2445
Grant CEP: GA MŠMT LC527; GA MŠMT LA08047
Výzkumný záměr: CEZ:AV0Z10100502
Klíčová slova: D0 * photon * cross sections * diphoton
Kód oboru RIV: BF - Elementární částice a fyzika vys. energií
Impakt faktor: 5.255, rok: 2010
http://arxiv.org/abs/1002.4917

We present a measurement of direct photon pair production cross sections using 4.2 fb-1 of data collected with the D0 detector at the Fermilab Tevatron proton-antiproton Collider. We measure single differential cross sections as a function of the diphoton mass, the transverse momentum of the diphoton system, the azimuthal angle between the photons, and the polar scattering angle of the photons, as well as the double differential cross sections considering the last three kinematic variables in three diphoton mass bins. The results are compared with different perturbative QCD predictions and event generators.
Trvalý link: http://hdl.handle.net/11104/0191742