Photoproduction of J/ψin Pb–Pb and p–Pb collisions at the LHC with the ALICE detector

Abstract

Abstract. Recent results from the ALICE Collaboration on the photoproduction of J/ψ in Pb-Pb and p-Pb collisions are presented along with results on the production of electron-positron pairs in the collision of two photons.

Azimuthal decorrelation for photon induced dijet production in ultra-peripheral collisions of heavy ions

“…Besides, UPCs involve two-photon fusions and photonuclear interactions, which provide an opportunity to study the quasi-real photons emitted by one of the colliding nuclei and probe the nuclear parton distribution functions (PDFs). Typical photonuclear processes [6][7][8][9][10][11][12][13][14][15] involve the photoproduction of vector mesons via photon-gluon fusions, which is a clean probe to study the gluon distributions inside the energetic nucleus [16][17][18][19][20][21][22][23][24][25][26]. Typical two-photon interactions involve dilepton productions [27][28][29][30][31][32][33] or diphoton productions from light-by-light scatterings [34].…”