Process dependence of the gluon Sivers function in 
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 within a TMD scheme in NRQCD

D’Alesio, U.; Maxia, Luca; Murgia, F.; Pisano, Cristian; Rajesh, Sangem

doi:10.1103/physrevd.102.094011

Cited by 27 publications

(23 citation statements)

References 44 publications

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“…Here, C 1 and C 2 are the color factors for the polarized hard process associated with the attachment of the additional gluon to the HF quark and anti-quark [3,48,49], respectively. The function h(Q, y, p T , y J , µ) is the kinematic part of the hard function.…”

Section: Jhep05(2021)286mentioning

confidence: 99%

QCD evolution of the gluon Sivers function in heavy flavor dijet production at the Electron-Ion Collider

Kang

Reiten

Shao

et al. 2021

J. High Energ. Phys.

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Using Soft-Collinear Effective Theory, we develop the transverse-momentum-dependent factorization formalism for heavy flavor dijet production in polarized-proton-electron collisions. We consider heavy flavor mass corrections in the collinear-soft and jet functions, as well as the associated evolution equations. Using this formalism, we generate a prediction for the gluon Sivers asymmetry for charm and bottom dijet production at the future Electron-Ion Collider. Furthermore, we compare theoretical predictions with and without the inclusion of finite quark masses. We find that the heavy flavor mass effects can give sizable corrections to the predicted asymmetry.

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Section: Jhep05(2021)286mentioning

confidence: 99%

QCD evolution of the gluon Sivers function in heavy flavor dijet production at the Electron-Ion Collider

Kang

Reiten

Shao

et al. 2021

J. High Energ. Phys.

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“…See Refs. [71][72][73][74] for more details and for tables collecting the colour factors for all Feynman diagrams contributing to the partonic processes involved in J/ψ production.…”

Section: Single Spin Asymmetrymentioning

confidence: 99%

“…The notation in these equations should be self-explicative, see however [71][72][73][74] for more details. We only notice that, as already discussed, in the CGI-GPM we have to take into account two independent gluon Sivers functions, named d-type and f -type, with a terminology that recalls their origin in the two different ways to neutralize colour.…”

Section: Single Spin Asymmetrymentioning

confidence: 99%

“…From these results we can make few additional comments: First, the asymmetry shows a clear oscillatory behaviour. This is basically due to subtle cancellations related to the dynamics of the different hard scattering contributions, as weighed by the Sivers azimuthal phase in the convolution integrals (see [74] for more details). For the same reason, the size of A N depends crucially on the values of P T considered.…”

Section: Single Spin Asymmetrymentioning

confidence: 99%

“…In this respect, inclusive particle production at low transverse momentum in the central rapidity region is the most favourable enviroment. Higgs [69,70] and quarkonium [71][72][73][74] production in gluon-fusion dominated proton-proton collisions are the most relevant examples, but a variety of other processes have been considered. Among them we mention: inclusive jet [75], pion and photon production in proton-proton collisions at mid-rapidities [72,76], heavy-quark pair [75,77,78] and quarkonium [79] pro-duction, quarkonium plus jet/photon [80,81] or dijet [82,83] production in proton-proton and lepton-proton collisions.…”

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confidence: 99%

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Investigating the Transverse Momentum Dependent Gluon Sivers Function in Quarkonium Production at pp Colliders

2021

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In this contribution, we will present a short overview of the transverse momentum dependent (TMD) approach as a tool for studying the 3-dimensional structure of hadrons in high-energy (un)polarized hadron collisions. We will then summarize the present status of a running research programme that aims at constraining the poorly known transverse momentum dependent gluon Sivers function, through the study of single spin asymmetries in quarkonium (mainly J/ψ), pion, and D-meson production in polarized proton-proton collisions at RHIC. Finally, we will shortly discuss perspectives for this field of research, emphasizing in particular its role in the physics programme of LHC in the fixed-target setup and NICA-SPD at JINR.

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Gluon TMD fragmentation function into quarkonium

Echevarria,

Romera,

Scimemi

2023

J. High Energ. Phys.

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We compute the gluon transverse-momentum-dependent fragmentation function (TMDFF) at next-to-leading order (NLO) into heavy quarkonium in the color-octet $$ {}^3{S}_1^{\left[8\right]} $$ S 1 8 3 channel, based on the NRQCD factorization approach. The spurious rapidity divergences are explicitly shown to cancel in a well-defined TMDFF, which incorporates the needed soft factor. We also compute the integrated gluon FF at NLO in the same $$ {}^3{S}_1^{\left[8\right]} $$ S 1 8 3 channel, and show that the matching coefficient of the TMDFF onto the FF at large transverse momentum is the expected one. These results are relevant to perform precise and sensible phenomenological studies of transverse-momentum spectra of quarkonium production, for which the production mechanism through fragmentation plays a relevant role, like in the future Electron-Ion Collider.

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Process dependence of the gluon Sivers function in p↑p→J/ψ+X within a TMD scheme in NRQCD

Cited by 27 publications

References 44 publications

QCD evolution of the gluon Sivers function in heavy flavor dijet production at the Electron-Ion Collider

QCD evolution of the gluon Sivers function in heavy flavor dijet production at the Electron-Ion Collider

Investigating the Transverse Momentum Dependent Gluon Sivers Function in Quarkonium Production at pp Colliders

Gluon TMD fragmentation function into quarkonium

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