Direct-Photon Production in p+p Collisions at sqrt(s)=200 GeV at Midrapidity

Abstract

The differential cross section for the production of direct photons in p+p collisions at sqrt(s)=200 GeV at midrapidity was measured in the PHENIX detector at the Relativistic Heavy Ion Collider. Inclusive-direct photons were measured in the transverse-momentum range from 5.5--25 GeV/c, extending the range beyond previous measurements. Event structure was studied with an isolation criterion. Next-to-leading-order perturbative-quantum-chromodynamics calculations give a good description of the spectrum. When the cross section is expressed versus x_T, the PHENIX data are seen to be in agreement with measurements from other experiments at different center-of-mass energies.

PHENIX Collaboration, 383 authors, 16 pages, 14 figures, 7 tables. Submitted to Phys. Rev. D. Plain text data tables for the points plotted in figures for this and previous PHENIX publications are (or will be) publicly available at http://www.phenix.bnl.gov/papers.html

References in corpus (4)

• A new critical study of photon production in hadronic collisions
• Inclusive cross section and double helicity asymmetry for π^0 production in p+p collisions at sqrt(s)=200 GeV: Implications for the polarized gluon distribution in the proton
• Quantitative constraints on the gluon distribution function in the proton from collider isolated-photon data
• Measurement of direct photon production in p + p collisions at sqrt(s) = 200 GeV

Cited by in corpus (37)

• Production and Elliptic Flow of Dileptons and Photons in the semi-Quark Gluon Plasma
• Direct real photons in relativistic heavy ion collisions
• Centrality, rapidity and transverse momentum dependence of isolated prompt photon production in lead-lead collisions at $\sqrt{s_{\mathrm{NN}}}=2.76$ TeV measured with the ATLAS detector
• Direct photon production in d+Au collisions at sqrt(s_NN)=200 GeV
• Isolating Prompt Photons with Narrow Cones
• Probing the small-$x$ nuclear gluon distributions with isolated photons at forward rapidities in p+Pb collisions at the LHC
• Applicability of transverse mass scaling in hadronic collisions at the LHC
• Photon production from gluon mediated quark-anti-quark annihilation at confinement
• Nonprompt direct-photon production in Au$+$Au collisions at $\sqrt{s_{{}_{NN}}}=200$ GeV
• Isolated photon production and pion-photon correlations in high-energy $pp$ and $pA$ collisions
• $\gamma$-hadron spectra in p + Pb collisions at $\sqrt{s_{\mathrm{NN}}}=5.02$ TeV
• Probing gluon spin-momentum correlations in transversely polarized protons through midrapidity isolated direct photons in $p^{\uparrow }+p$ collisions at $\sqrt{s}=200$ GeV
• Access to Photon Fragmentation Functions in Hadronic Jet Production
• Nonperturbative-transverse-momentum effects and evolution in dihadron and direct photon-hadron angular correlations in $p$$+$$p$ collisions at $\sqrt{s}$=510 GeV
• Disentangling centrality bias and final-state effects in the production of high-$p_T$ ${\pi }^0$ using direct $\gamma$ in $d$$+$Au collisions at $\sqrt{s_{{}_{NN}}}=200$ GeV
• Photons and low-mass dileptons: results from PHENIX
• Photons from thermalizing matter in heavy ion collisions
• Photon radiation from heavy-ion collisions in the $\sqrt{s_{NN}}=19-200$ GeV regime
• Prompt photon production in high-energy $pA$ collisions at forward rapidity
• Highlights from BNL-RHIC 2011-2013
• Nonperturbative transverse-momentum-dependent effects in dihadron and direct photon-hadron angular correlations in $p+p$ collisions at $\sqrt{s}=200$ GeV
• Predictions for the isolated prompt photon production at the LHC at $\sqrt{s}=$13 TeV
• A new description of transverse momentum spectra of identified particles produced in proton-proton collisions at high energies
• An energy independent scaling of transverse momentum spectra of direct (prompt) photons from two-body processes in high-energy proton-proton collisions
• Measurement of inclusive electrons from open heavy-flavor hadron decays in $p$+$p$ collisions at $\sqrt{s}=200$ GeV with the STAR detector
• Measurements of direct photons in Au+Au collisions with PHENIX
• Spatially dependent parton distribution functions and hard processes in nuclear collisions
• Single isolated photon production in the NLO${}^{\star }$ approximation of the Parton Reggeization Approach
• Overview of electromagnetic probes in ultra-relativistic heavy-ion collisions
• How do quarks and gluons lose energy in the QGP?
• Direct Photon Measurements at PHENIX
• Centrality dependence of low-momentum direct-photon production in Au$+$Au collisions at $\sqrt{s_{{}_{NN}}}=200$ GeV
• Single photon production in ppBar collision in the collinear and kt-factorisation framework and investigation of their differences
• Effects of Intense Magnetic Fields, High Temperature and Density on QCD-Related Phenomena
• Prompt photon production and photon-hadron jet correlations with POWHEG
• Shining a Light on the QGP - Electroweak Probes Experimental Summary
• Transverse Single-Spin Asymmetries of Midrapidity Direct Photons, Neutral Pions, and Eta Mesons in 200 GeV Polarized Proton-Proton Collisions at PHENIX