Measurement of the differential cross sections for isolated direct photon pair production in ppˉ collisions at √s = 1.96 TeV

0397660 - FZÚ 2014 RIV NL eng J - Journal Article
Abazov, V. M. - Abbott, B. - Acharya, B.S. - Kupčo, Alexander - Lokajíček, Miloš … Total 369 authors
Measurement of the differential cross sections for isolated direct photon pair production in ppˉ collisions at √s = 1.96 TeV.
Physics Letters. B. Roč. 725, 1-3 (2013), s. 6-14. ISSN 0370-2693. E-ISSN 1873-2445
R&D Projects: GA MŠMT(CZ) LG12006
Institutional support: RVO:68378271
Keywords : anti-p p * interaction * pair production * photon * direct production * mass spectrum * angular correlation * two-photon * D0 * Fermilab
Subject RIV: BG - Nuclear, Atomic and Molecular Physics, Colliders
Impact factor: 6.019, year: 2013
http://www.sciencedirect.com/science/article/pii/S037026931300511X

We present measurements of direct photon pair production cross sections using 8.5 fb−1 of data collected with the D0 detector at the Fermilab Tevatron ppˉ collider. The results are presented as differential distributions of the photon pair invariant mass dσ/dMγγ, pair transverse momentum dσ/dpγγT, azimuthal angle between the photons dσ/dΔϕγγ, and polar scattering angle in the Collins-Soper frame dσ/d|cosθ*|. Measurements are performed for isolated photons with transverse momenta pγT>18 (17) GeV for the leading (next-to-leading) photon in pT, pseudorapidities |ηγ|<0.9, and a separation in η−ϕ space ΔRγγ>0.4.
Permanent Link: http://hdl.handle.net/11104/0225284