Abstract
We study the long-range in rapidity near-side and away-side azimuthal collimation, the so-called “ridge” structure for di-photon correlations in high-energy proton-nucleus (p+A) collisions. We show that based on the initial-state Color-Glass-Condensate at leading-log approximation, the ridge-like structure for di-photon correlations disappears at the LHC energies. Nevertheless, the near-side and away-side correlations coming from the remanent of double and single fragmentation contributions respectively, survive upto Δη≈1÷3 in rapidity interval between two produced photons at RHIC and the LHC. Therefore, an experimental observation of ridge-like structure in di-photon correlations at the LHC similar to the one observed in di-hadron correlations in p+p(A) collisions, may suggest that final-state effects play important role in the formation of the ridge.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
