Title: Photoproduction of three jets in the CGC: gluon TMDs and dilute limit

Abstract

We study the process γA →\( q\overline{q}g \) + X in the Color Glass Condensate (CGC) effective theory. After obtaining the cross section, we consider two kinematic limits which are encompassed in our result. In the so-called correlation limit, the vector sum of the transverse momenta of the three outgoing particles is small with respect to the individual transverse momenta; the cross section then simplifies considerably and can be written in a factorized form, sensitive to both the unpolarized and linearly-polarized Weizsäcker-Williams transverse momentum dependent gluon distribution function (gluon TMD). The second limit of the CGC cross section that we consider is the dilute limit, which we obtain after performing a weak-field expansion; we recover a typical linear-regime expression, involving a single unintegrated gluon distribution function. Using numerical simulations of the small-x QCD evolution of the TMDs, we investigate the rapidity dependence of the cross section in the correlation limit.

Authors:

Altinoluk, Tolga ^[1]; Boussarie, Renaud ^[2]; Marquet, Cyrille ^[3]; Taels, Pieter  ^[4]

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+ Show Author Affiliations

1. National Centre for Nuclear Research, Warsaw (Poland). Theoretical Physics Division
2. Brookhaven National Lab. (BNL), Upton, NY (United States). Physics Dept.
3. Ecole Polytechnique, Palaiseau (France). Centre de Physique Theorique
4. Ecole Polytechnique, Palaiseau (France). Centre de Physique Theorique; ; Istituto Nazionale di Fisica Nucleare (INFN), Cagliari (Italy). Cittadella Univ., Sezione di Cagliari

Publication Date:

Tue Jul 21 00:00:00 EDT 2020

Research Org.:

Brookhaven National Laboratory (BNL), Upton, NY (United States)

Sponsoring Org.:

USDOE Office of Science (SC), Nuclear Physics (NP); USDOE Laboratory Directed Research and Development (LDRD) Program; Polish National Science Centre (NCN); European Union (EU); French National Research Agency (ANR)

OSTI Identifier:

1658559

Report Number(s):

BNL-216336-2020-JAAM
Journal ID: ISSN 1029-8479; TRN: US2203345

Grant/Contract Number:  

SC0012704; 2018/31/D/ST2/00666; RISE-823947; ANR-16- CE31-0019-02

Resource Type:

Accepted Manuscript

Journal Name:

Journal of High Energy Physics (Online)

Additional Journal Information:

Journal Name: Journal of High Energy Physics (Online); Journal Volume: 2020; Journal Issue: 7; Journal ID: ISSN 1029-8479

Publisher:

Springer Berlin

Country of Publication:

United States

Language:

English

Subject:

73 NUCLEAR PHYSICS AND RADIATION PHYSICS; heavy ion phenomenology