# Quark Matter 2019 - the XXVIIIth International Conference on Ultra-relativistic Nucleus-Nucleus Collisions

3-9 November 2019
Wanda Reign Wuhan Hotel
Asia/Shanghai timezone

## Isolated photon production in pp collisions at $\sqrt{s}=13$ TeV measured with ALICE

4 Nov 2019, 17:40
20m
Wanda Han Show Theatre & Wanda Reign Wuhan Hotel

#### Wanda Han Show Theatre & Wanda Reign Wuhan Hotel

Poster Presentation Electromagnetic probes

### Speaker

Ran Xu (Central China Normal University CCNU (CN))

### Description

Direct photons from Compton and annihilation hard processes, produced in hard scatterings of partons from incoming nucleons, are unique colourless probes of QCD processes. The measurement provides a handle for testing perturbative QCD predictions and constrain the parton distribution functions.
In this contribution, we present the measurements of isolated photon cross section in pp collisions at $\sqrt{s}=13$ TeV using the data collected by the ALICE with a trigger based on electromagnetic calorimeters. Isolation criterion is applied to select direct photons and reduce contamination from decay and fragmentation photons. The result will be compared to theoretical calculations.

### Primary author

Ran Xu (Central China Normal University CCNU (CN))

### Presentation Materials

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