Photon - Jet Correlations and Constraints on Fragmentation Functions
Z. Belghobsi, M. Fontannaz, J.-Ph. Guillet, G. Heinrich, E.Pilon, M., Werlen
TL;DR
This paper investigates photon-jet correlations in proton-proton collisions to improve understanding of gluon distribution and photon fragmentation functions, highlighting potential constraints from RHIC data.
Contribution
It demonstrates how photon-jet observables can be used to constrain photon fragmentation functions and gluon distributions, offering new insights beyond previous LEP experiments.
Findings
Photon-jet correlations are sensitive to gluon distribution functions.
RHIC data can constrain photon fragmentation functions in new regions.
Potential for improved understanding of proton structure.
Abstract
We study the production of a large-pT photon in association with a jet in proton-proton collisions. We examine the sensitivity of the jet rapidity distribution to the gluon distribution function in the proton. We then assess the sensitivity of various photon + jet correlation observables to the photon fragmentation functions. We argue that RHIC data on photon-jet correlations can be used to constrain the photon fragmentation functions in a region which was barely accessible in LEP experiments.
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