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We employ a simple model for nuclear modification of ordinary parton densities in a proton to evaluate the Transverse Momentum Dependent gluon and quark distributions in nuclei (nTMDs) within the popular…

高能物理 - 唯象学 · 物理学 2026-02-10 A. V. Lipatov , A. V. Kotikov

The inclusive hadronic production of $\eta_Q$($\eta_c$ or $\eta_b$) pair is proposed to extract the transverse momentum dependent(TMD) gluon distribution functions. We use nonrelativistic QCD(NRQCD) for the production of $\eta_Q$. Under…

高能物理 - 唯象学 · 物理学 2014-12-03 Guang-Peng Zhang

The next-to-leading order hard function for quarkonium electroproduction is calculated within the framework of transverse-momentum-dependent (TMD) factorization in the low-transverse-momentum regime. The structure of the TMD shape function…

高能物理 - 唯象学 · 物理学 2026-04-21 Miguel G. Echevarria , Raj Kishore , Samuel F. Romera

We investigate QCD effects in the production of a single slepton at hadron colliders in the Minimal Supersymmetric Standard Model without R-parity. We calculate the total cross sections and the transverse momentum distributions at…

高能物理 - 唯象学 · 物理学 2009-11-11 Li Lin Yang , Chong Sheng Li , Jian Jun Liu , Qiang Li

Incorporating all recent theoretical advances, we resum soft-gluon corrections to the total $t\bar t$ cross-section at hadron colliders at the next-to-next-to-leading logarithmic (NNLL) order. We perform the resummation in the well…

高能物理 - 唯象学 · 物理学 2015-06-03 Matteo Cacciari , Michal Czakon , Michelangelo L. Mangano , Alexander Mitov , Paolo Nason

The leading twist transverse momentum dependent parton distributions (TMDs) are studied in a light-cone description of the nucleon where the Fock expansion is truncated to consider only valence quarks. General analytic expressions are…

高能物理 - 唯象学 · 物理学 2010-05-28 B. Pasquini , S. Cazzaniga , S. Boffi

This handbook provides a comprehensive review of transverse-momentum-dependent parton distribution functions and fragmentation functions, commonly referred to as transverse momentum distributions (TMDs). TMDs describe the distribution of…

We present a first lattice QCD calculation of the unpolarized nucleon's isovector transverse-momentum-dependent parton distribution functions (TMDPDFs), which are essential to predict observables of multi-scale, semi-inclusive processes in…

We compute the gluon transverse-momentum-dependent fragmentation function (TMDFF) at next-to-leading order (NLO) into heavy quarkonium in the color-octet $^3S_1^{[8]}$ channel, based on the NRQCD factorization approach. The spurious…

高能物理 - 唯象学 · 物理学 2024-01-02 Miguel G. Echevarria , Samuel F. Romera , Ignazio Scimemi

We propose the $pp \rightarrow \text{jet} + \gamma $ as a new process for studying the Transverse Momentum Dependent Parton Distribution Functions (TMDs). To do so, we developed a novel framework for the jet-$\gamma$ imbalance in $pp…

高能物理 - 唯象学 · 物理学 2018-12-19 Maarten G. A. Buffing , Zhong-Bo Kang , Kyle Lee , Xiaohui Liu

In this paper we consider the parametrizations of gluon transverse momentum dependent (TMD) correlators in terms of TMD parton distribution functions (PDFs). These functions, referred to as TMDs, are defined as the Fourier transforms of…

高能物理 - 唯象学 · 物理学 2016-11-03 Daniël Boer , Sabrina Cotogno , Tom van Daal , Piet J. Mulders , Andrea Signori , Ya-Jin Zhou

This paper introduces a transverse-momentum dependent (TMD) factorization scheme designed to unify both large and small Bjorken-x regimes. We compute the next-to-leading order (NLO) quantum chromodynamics (QCD) corrections to the gluon TMD…

高能物理 - 唯象学 · 物理学 2024-03-04 Swagato Mukherjee , Vladimir V. Skokov , Andrey Tarasov , Shaswat Tiwari

Transverse momentum dependent (TMD) parton correlators describing the partonic structure of hadrons contain gauge links, required by color gauge invariance. The required gauge links enter in the matrix elements that contain the parton…

高能物理 - 唯象学 · 物理学 2013-10-02 M. G. A. Buffing , A. Mukherjee , P. J. Mulders

Inclusive production of a quarkonium $\eta_{c,b}$ in hadron collisions at low transverse momentum can be used to extract various Transverse-Momentum-Dependent(TMD) gluon distributions of hadrons, provided the TMD factorization for the…

高能物理 - 唯象学 · 物理学 2016-02-03 J. P. Ma , C. Wang

We present an algorithm for massive parton evolution which is based on the differentially accurate simulation of soft-gluon radiation by means of a non-trivial azimuthal angle dependence of the splitting functions. The kinematics mapping is…

高能物理 - 唯象学 · 物理学 2024-10-04 Benoit Assi , Stefan Höche

Quarkonium production in hadron collisions at low transverse momentum $q_\perp \ll M$ with $M$ as the quarkonium mass can be used for probing transverse momentum dependent (TMD) gluon distributions. For this purpose, one needs to establish…

高能物理 - 唯象学 · 物理学 2013-08-13 J. P. Ma , J. X. Wang , S. Zhao

We study higher-order QCD corrections for the associated production of a top-antitop quark pair and a photon ($t{\bar t}\gamma$ production) in proton-proton collisions. We calculate the approximate NNLO cross section, with second-order…

高能物理 - 唯象学 · 物理学 2023-03-01 Nikolaos Kidonakis , Alberto Tonero

We propose to introduce the intrinsic transversal momentum distribution functions (iTMDs), in conjunction with the light-cone distribution amplitudes (LCDAs), to elucidate the probability amplitude of encountering a meson state wherein the…

高能物理 - 唯象学 · 物理学 2025-03-25 Jian Chai , Shan Cheng

We demonstrate that gluon transverse-momentum-dependent parton distribution functions (TMDPDFs) can be extracted from lattice calculations of appropriate Euclidean correlations in large-momentum effective theory (LaMET). Based on…

高能物理 - 唯象学 · 物理学 2023-02-14 Ruilin Zhu , Yao Ji , Jian-Hui Zhang , Shuai Zhao

I discuss how the rapidity evolution of gluon transverse momentum dependent distribution changes from nonlinear evolution at small $x\ll 1$ to linear evolution at moderate $x\sim 1$.

高能物理 - 唯象学 · 物理学 2015-10-23 Ian Balitsky