May 13 – 19, 2018
Venice, Italy
Europe/Zurich timezone
The organisers warmly thank all participants for such a lively QM2018! See you in China in 2019!

Estimation of background for photon-hadron correlations in proton-lead collisions at sqrt(sNN) = 5.02 TeV with ALICE

May 15, 2018, 5:00 PM
2h 40m
First floor and third floor (Palazzo del Casinò)

First floor and third floor

Palazzo del Casinò

Poster Electromagnetic and weak probes Poster Session


Barbara Jacak (Lawrence Berkeley National Lab. (US))


This poster presents a study of an estimation of the background for the measurement of photon-hadron correlations in 5.02 TeV proton-lead collisions. Photon-hadron correlations measure the fragmentation function, which may be modified by energy loss in the QGP. The energy of the photon is not affected by the QGP, so it gives information about the energy of the parton prior to interaction with the QGP. This parton fragments into a jet from which the hadron arises. The main background for this measurement are photons from meson decays. This is estimated via a parameterization of the measurement of the pi0 and eta cross sections and theoretical calculations of the direct photon cross-section using JETPHOX and PeTeR. In order to ensure purity of the photon trigger, we investigate template fits to a novel shower shape variable, which is being developed for the ALICE electromagnetic calorimeter.

Collaboration ALICE
Centralised submission by Collaboration Presenter name already specified
Content type Experiment

Primary author

Alwina Liu (Lawrence Berkeley National Lab. (US))

Presentation materials