Prompt photon-jet angular correlations at central rapidities in 
<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:mi>p</mml:mi><mml:mo>+</mml:mo><mml:mi>A</mml:mi></mml:mrow></mml:math>
 collisions

Benić, Sanjin; Dumitru, Adrian

doi:10.1103/physrevd.97.014012

Cited by 22 publications

(22 citation statements)

References 51 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…90 derived the correlation limit of the CGC cross section for quark-antiquark pair production in hadronhadron collisions and an agreement with the TMD factorization approach was found, Ref. 91 derived the correlation limit for photon-jet production at central rapidites from the partonic subprocess g → qqγ and Ref. 92 derived the correlation limit for dijet production in pA collisions accompanied with an extra soft photon in the final state.…”

Section: Correlation Limit Of the Cgc Cross Sectionmentioning

confidence: 84%

TMD gluon distributions at small x in the CGC theory

Petreska

2018

Int. J. Mod. Phys. E

View full text Add to dashboard Cite

We review recent progress in the description of unpolarized transverse-momentum-dependent (TMD) gluon distributions at small x in the color glass condensate (CGC) effective theory. We discuss the origin of the non-universality of TMD gluon distributions in the TMD factorization framework and in the CGC theory and the equivalence of the two approaches in their overlapping domain of validity. We show some applications of this equivalence, including recent results on the behavior of TMD gluon distributions at small x, and on the study of gluon saturation. We discuss recent advances in the unification of the TMD evolution and the non-linear small-x evolution of gluon distributions. * petreska@nikhef.nl arXiv:1804.04981v1 [hep-ph]

show abstract

Section: Correlation Limit Of the Cgc Cross Sectionmentioning

confidence: 84%

TMD gluon distributions at small x in the CGC theory

Petreska

2018

Int. J. Mod. Phys. E

View full text Add to dashboard Cite

show abstract

“…We concentrate on the process: p(p p ) + A(p A ) → γ(q 1 ) + g(q 2 ) + q(q 3 ) + X , (1.1) with the transverse momentum of the photon smaller than or of order, and the transverse momenta of the jets much larger than, the saturation scale of the nucleus. 1 A somewhat related calculation of photon plus two jet production, but tailored to the central rapidity region and thus dominated by different diagrams, can be found in [18]. The plan of the paper is as follows.…”

Section: Introductionmentioning

confidence: 99%

“…(A. 18) In order to be consistent with the "bare quark-gluon component " we should introduce the Ioffe time restriction for the gluon emission. Effectively, this corresponds to restricting the integration region of the momentum K, which is conjugate to the quark-gluon dipole size, from above, i.e.,…”

mentioning

confidence: 99%

Soft photon and two hard jets forward production in proton-nucleus collisions

Altinoluk¹,

Petreska²,

Lublinsky³

et al. 2018

J. High Energ. Phys.

View full text Add to dashboard Cite

We calculate the cross section for production of a soft photon and two hard jets in the forward rapidity region in proton-nucleus collisions at high energies. The calculation is performed within the hybrid formalism. The hardness of the final particles is defined with respect to the saturation scale of the nucleus. We consider both the correlation limit of small momentum imbalance and the dilute target limit where the momentum imbalance is of the order of the hardness of the jets. The results depend on the first two transversemomentum-dependent (TMD) gluon distributions of the nucleus.

show abstract

“…Its calculation is exactly the same as the bef-aft contribution, with the amplitude and complex conjugate amplitude interchanged. The dipole sizes are 37) and after performing this change of variables, the aft-bef contribution can be written as:…”

Section: Aft-bef Contributionmentioning

confidence: 99%

TMD factorization for dijets + photon production from the dilute-dense CGC framework

Altinoluk

Boussarie

Marquet

et al. 2019

J. High Energ. Phys.

View full text Add to dashboard Cite

We calculate the production of a photon and two jets at forward rapidity in proton-nucleus collisions, within the hybrid dilute-dense framework in the Color Glass Condensate (CGC) formalism. After obtaining the cross section for both the quark-and gluon-initiated channels, we consider the correlation limit, in which the vector sum of the transverse momenta of the three outgoing particles is small with respect to the individual transverse momenta. In this limit, the cross section simplifies considerably and can be written in a factorized form, sensitive to various unpolarized and linearly-polarized transverse-momentum-dependent gluon distribution functions (gluon TMDs). Thus, we demonstrate for the first time that the emergence of a TMD factorization formula in the correlation limit, from CGC expressions, holds beyond the previously-considered simpler 2 → 2 processes.In the case of collinear factorization, there is a single hard scale, and the PDFs and FFs are only a function of this scale and of the longitudinal momentum fraction x of the parton. However, in less inclusive processes that depend on a second, smaller scale, these distributions need to be generalized to include the dependence on the transverse momentum of the parton, yielding the so-called transverse-momentum-dependent (TMD) PDFs and FFs. These TMD PDFs/FFs are of great interest since their measurement offers insight in the three-dimensional structure of the proton in terms of the QCD degrees of freedom. However, in contrast to their collinear counterparts, which are believed to be universal, they depend on the hard process under consideration and are therefore more complicated.The radiative corrections that are considered in collinear factorization involve logarithms ln Q 2 /µ 2 in the scale, and can be resummed with the help of the Dokshitzer-Gribov-Lipatov-Altarelli-Parisi (DGLAP) [1] evolution equations. In the TMD factorization framework [2], additional logarithms of the form ln Q 2 /k 2 t need to be resummed, where k t is the small transverse momentum scale in the problem.At very high energies, however, soft logarithms in the center-of-mass energy ln s are expected to be dominant, necessitating a resummation and subsequently an evolution equation in rapidity instead of the scale, provided by the (linear) Balitsky-Fadin-Kuraev-Lipatov (BFKL) equation [3]. BFKL involves a universal unintegrated gluon PDF, which just like the TMDs depends on transverse momentum. One of the most fascinating aspects of QCD at high energy or small x, is the phenomenon of saturation [4]: the damping of the steep rise of the gluon density predicted by BFKL, caused by gluon recombinations which become important due to the high density. The low-x evolution of the gluon density in the presence of these nonlinear interactions is described by an effective theory known as the Color Glass Condensate (CGC), which leads to the nonlinear BK-JIMWLK evolution equations [5][6][7][8].Within the CGC framework, the hybrid formalism [9] is used to study single inclusive particle produ...

show abstract

Prompt photon-jet angular correlations at central rapidities in p+A collisions

Cited by 22 publications

References 51 publications

TMD gluon distributions at small x in the CGC theory

TMD gluon distributions at small x in the CGC theory

Soft photon and two hard jets forward production in proton-nucleus collisions

TMD factorization for dijets + photon production from the dilute-dense CGC framework

Contact Info

Product

Resources

About