Photon-jet correlations in $pp$ and $p \bar p$ collisions

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dc.creatorPietrycki, Tomasz
dc.creatorSzczurek, Antoni
dc.date2007-04-17
dc.date2007-04-20
dc.date.accessioned2026-07-07T10:59:36Z
dc.date.available2026-07-07T10:59:36Z
dc.descriptionWe compare results of the $k_t$-factorization approach and the next-to-leading order collinear-factorization approach for photon-jet correlations in $pp$ and $p \bar p$ collisions at RHIC and Tevatron energies. We discuss correlations in the azimuthal angle as well as in the two-dimensional space of transverse momentum of photon and jet. Different unintegrated parton distributions (UPDF) are included in the $k_t$-factorization approach. The results depend on UPDFs used. The standard collinear approach gives cross section comparable to the $k_t$-factorization approach. For correlations of the photon and any jet the NLO contributions dominate at relatively small azimuthal angles as well as for asymmetric transverse momenta. For correlations of the photon with the leading jet (the one having the biggest transverse momentum) the NLO approach gives zero contribution at $ϕ_{-} < π/2$ which opens a possibility to study higher-order terms and/or UPDFs in this region.
dc.description14 pages, 17 figures
dc.identifierhttps://arxiv.org/abs/0704.2158
dc.identifierhttp://arxiv.org/abs/0704.2158
dc.identifierPhys.Rev.D76:034003,2007
dc.identifierdoi:10.1103/PhysRevD.76.034003
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/187459
dc.subjectHigh Energy Physics - Phenomenology
dc.titlePhoton-jet correlations in $pp$ and $p \bar p$ collisions
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