Prompt photon production and photon-hadron correlations at RHIC and the LHC from the color glass condensate

2012/04/30 by Jamal Jalilian-Marian, Amir Reza Jalilian, Amir H. Rezaeian · 92 citations
Physics and Astronomy · #Color-glass condensate #Cosmology and Gravitation Theories #Gluon #Hadron #Heavy ion #High-Energy Particle Collisions Research #Ion #Large Hadron Collider #Nuclear physics #Particle physics #Particle physics theoretical and experimental studies #Photon #Physics #Quark #Rapidity #Relativistic Heavy Ion Collider #hep-ex #hep-ph #nucl-ex #nucl-th

paper · pdf · doi:10.1103/physrevd.86.034016

published in Physical review. D. Particles, fields, gravitation, and cosmology/Physical review. D. Particles and fields 86(3) (American Physical Society) · 18 pages, 16 figures; v2: 3 plots added. The version to appear in PRD

arxiv created 2012/07/16 · openalex publication_date 2012/08/15 · arxiv updated 2012/08/17 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05

Abstract

We investigate inclusive prompt photon and semi-inclusive prompt photon-hadron production in high energy proton-nucleus collisions using the color glass condensate formalism, which incorporates nonlinear dynamics of gluon saturation at small x via the Balitsky-Kovchegov equation with a running coupling. For inclusive prompt photon production, we rewrite the cross section in terms of direct and fragmentation contributions and show that the direct photon (and isolated prompt photon) production is more sensitive to gluon saturation effects. We then analyze azimuthal correlations in photon-hadron production in high energy proton-nucleus collisions and obtain a strong suppression of the away-side peak in photon-hadron correlations at forward rapidities, similar to the observed mono-jet production in deuteron-gold collisions at forward rapidity at the Relativistic Heavy Ion Collider. We make predictions for the nuclear modification factor R_p(d)A and photon-hadron azimuthal correlations in proton(deuteron)-nucleus collisions at the Relativistic Heavy Ion Collider and the Large Hadron Collider at various rapidities.

Citations

• Nuclear structure functions at smallx
• Wilson renormalization group for lowxphysics: Towards the high density regime
• Triumvirate of running couplings in small-x evolution
• Photon + hadron production in high energy deuteron (proton)–nucleus collisions
• The BFKL equation from the Wilson renormalization group
• Nuclear enhancement and suppression of diffractive structure functions at high energies
• Global analysis of nuclear parton distributions
• Heavy Ion Collisions at the LHC - Last Call for Predictions
• Fragmentation functions for pions, kaons, and protons at next-to-leading order
• Saturation physics at HERA and RHIC: An unified description
• The Cronin effect, quantum evolution and the color glass condensate
• Forward rapidity hadron production in deuteron–gold collisions from valence quarks
• Inclusive prompt photon production in nuclear collisions at RHIC and LHC
• The Color Glass Condensate
• Forward Neutral Pion Production inp+pandd+AuCollisions atsNN=200 GeV
• Cronin effect and high-pTsuppression inpAcollisions

Cited by

• Next-to-leading order Balitsky-Kovchegov equation with resummation
• Isolated photon production in proton-nucleus collisions at forward rapidity
• Photon-jet ridge at RHIC and the LHC
• Physics with high-luminosity proton-nucleus collisions at the LHC
• Polarized 3 parton production in inclusive DIS at small x