Jul 6 – 13, 2022
Bologna, Italy
Europe/Rome timezone

Probing the initial state with isolated photon production in small collision systems with ALICE

Jul 7, 2022, 5:45 PM
Room 1 (Europa Auditorium)

Room 1 (Europa Auditorium)

Parallel Talk Strong interactions and Hadron Physics Strong interactions and Hadron Physics


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Isolated photon measurements in pp and p-Pb collision systems probe the initial state of the incoming nucleon or nucleus, providing the opportunity to constrain parton and nuclear parton density functions (PDFs), and probe cold nuclear matter effects. Measurements in small collision systems also offer a baseline for Pb-Pb collision measurements.

We present measurements by ALICE of inclusive isolated photon distributions in pp collisions at $\sqrt s$ = 7, 8 and 13 TeV and in p-Pb collisions at $\sqrt{s_{\mathrm{NN}}}$ = 5.02 TeV. The kinematic reach of these measurements is $p_{\mathrm{T}} > 10$ GeV/$c$, extending previous measurements at these centre-of-mass energies down to small $x\sim10^{-3}$.

In-person participation Yes

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