Eur. Phys. J. C (2008) 57: 613-619
https://doi.org/10.1140/epjc/s10052-008-0737-9

Special Article - Scientific Note

γ–hadron correlation measurements to study jets fragmentation with ALICE at LHC

¹ Institute of Particle Physics, Central China Normal University, Wuhan, China
² Laboratori Nazionali di Frascati, INFN, Frascati, Italy
³ Graduate School of Pure and Applied Sciences, University of Tsukuba, Tsukuba, Japan
⁴ IN2P3, Nantes, France
⁵ CERN, Genève, Suisse

^* e-mail: maoyx@iopp.ccnu.edu.cn

Received: 11 November 2007
Revised: 15 August 2008
Published online: 26 September 2008

Abstract

The possibility to study the fragmentation function of jets with energies below 50 GeV, which cannot be reconstructed in the heavy-ion environment, is explored. We propose to measure the imbalance distribution between prompt photon and charged hadrons with the ALICE experiment at LHC. In the present article, the case of proton–proton collisions at  TeV is examined with Monte-Carlo simulations. Performances for prompt photon identification and rejection of the π ⁰ decay photons are presented. We find that the measurement in proton–proton is meaningful with respect to statistical and systematic errors for photon energies larger than 20 GeV.