Illuminating the impact-parameter dependence of UPC dijet photoproduction

被引：1

作者：

Eskola, Kari J. ^{[1
]}

Guzey, Vadim ^{[1
]}

Helenius, Ilkka ^{[1
]}

Paakkinen, Petja ^{[1
]}

Paukkunen, Haulm ^{[2
]}

机构：

[1] Univ Jyvaskyla, Dept Phys, POB 35, Jyvaskyla 40014, Finland

[2] Univ Helsinki, Helsinki Inst Phys, POB 64, Helsinki 00014, Finland

来源：

30TH INTERNATIONAL CONFERENCE ON ULTRA-RELATIVISTIC NUCLEUS-NUCLEUS COLLISIONS, QUARK MATTER 2023 | 2024年 / 296卷

基金：

芬兰科学院; 欧洲研究理事会;

关键词：

PHOTON;

D O I：

10.1051/epjconf/202429617004

中图分类号：

O64 [物理化学（理论化学）、化学物理学]; O56 [分子物理学、原子物理学];

学科分类号：

070203 ; 070304 ; 081704 ; 1406 ;

摘要：

We present new NLO pQCD predictions for photoproduction of dijets in ultraperipheral PbPb collisions at 5.02 TeV with a realistic photon flux and up-to-date nuclear PDFs. Our calculation of the impact parameter dependence of the photon flux includes the effects of the nuclear form factor in the photon-emitting nucleus and the spatial dependence of nuclear PDFs of the target nucleus, which are estimated using theWood-Saxon nuclear density profile. We show that a significant portion of the measured dijets at large z(gamma) originate from events with impact parameters of the order of a few nuclear radii, and that the cross section predictions therefore become sensitive to the modelling of the nuclear geometry and photon flux close to the source nucleus.

引用

页数：4

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