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Higher-twist transverse momentum dependent parton distribution functions (TMDs) are a valuable probe of the quark-gluon dynamics in the nucleon, and play a vital role for the explanation of sizable azimuthal asymmetries in hadron production…

高能物理 - 唯象学 · 物理学 2015-06-23 C. Lorcé , B. Pasquini , P. Schweitzer

J/psi-pair production at the LHC is currently one of the few tools available to probe gluon transverse momentum distributions (TMDs). In this context, data from LHCb in the collider mode have the potential to probe the evolution of the…

高能物理 - 唯象学 · 物理学 2024-03-04 Alice Colpani Serri , Jelle Bor , Daniel Boer , Jean-Philippe Lansberg

We calculate the small-b (or large-qT) matching of transverse momentum dependent (TMD) distribution for linearly polarized gluons to the integrated gluon distributions at the next-to-next-to-leading order (NNLO). This is the last missing…

高能物理 - 唯象学 · 物理学 2020-01-08 Daniel Gutierrez-Reyes , Sergio Leal-Gomez , Ignazio Scimemi , Alexey Vladimirov

We argue that the distribution of hadrons near the longitudinal light-cone in central high-energy pA collisions is computable in weak coupling QCD. This is because the density of gluons per unit transverse area in the dense target at…

高能物理 - 唯象学 · 物理学 2009-11-07 Adrian Dumitru , Lars Gerland , Mark Strikman

We provide the proper definition of all the leading-twist (un)polarized gluon transverse momentum dependent parton distribution functions (TMDPDFs), by considering the Higgs boson transverse momentum distribution in hadron-hadron collisions…

高能物理 - 唯象学 · 物理学 2017-08-10 Miguel G. Echevarria , Tomas Kasemets , Piet J. Mulders , Cristian Pisano

We discuss how the main features of the recent LHC data on elastic scattering can be described by a QCD-inspired formalism with a dynamical infrared mass scale. For this purpose new developments on a dynamical gluon mass approach are…

高能物理 - 唯象学 · 物理学 2015-06-03 D. A. Fagundes , E. G. S. Luna , M. J. Menon , A. A. Natale

We discuss the evolution of the eight leading twist transverse momentum dependent parton distribution functions, which turns out to be universal and spin independent. By using the highest order perturbatively calculable ingredients at our…

高能物理 - 唯象学 · 物理学 2015-06-11 Miguel G. Echevarria , Ahmad Idilbi , Andreas Schäfer , Ignazio Scimemi

We discuss in detail a method to study transverse momentum dependent parton distribution functions (TMDs) using lattice QCD. To develop the formalism and to obtain first numerical results, we directly implement a bi-local quark-quark…

高能物理 - 格点 · 物理学 2012-07-17 Bernhard U. Musch , Philipp Hägler , John W. Negele , Andreas Schäfer

We consider the transverse-momentum ($p_T$) distribution of $ZZ$ and $W^+W^-$ boson pairs produced in hadron collisions. At small $p_T$, the logarithmically enhanced contributions due to multiple soft-gluon emission are resummed to all…

高能物理 - 唯象学 · 物理学 2015-09-03 Massimiliano Grazzini , Stefan Kallweit , Dirk Rathlev , Marius Wiesemann

We recall the origin of angular ordering of soft parton emission in the region of small $x$ and show that this coherent structure can be detected in associated distributions. For structure functions at small $x$ and at fixed transverse…

高能物理 - 唯象学 · 物理学 2009-10-28 Giuseppe Marchesini

We propose a new analytical expression for the Transverse Momentum Dependent (TMD, or unintegrated) gluon density in the proton. Essential phenomenological parameters are extracted from the LHC data on inclusive hadron production in $pp$…

高能物理 - 唯象学 · 物理学 2023-02-01 A. V. Lipatov , G. I. Lykasov , M. A. Malyshev

The Parton-Branching Method (PB) facilitates the determination of Transverse Momentum Dependent (TMD) parton densities across a wide \kt\ range, spanning small to large transverse momentum scales. In the small $k_T$ region, both intrinsic…

高能物理 - 唯象学 · 物理学 2024-02-27 S. Taheri Monfared

We discuss different operator definitions of the transverse-momentum dependent (TMD) parton densities from the point of view of their renormalization-group (RG) properties and UV evolution. We also consider the structure of the gauge links…

高能物理 - 唯象学 · 物理学 2011-04-04 I. O. Cherednikov , N. G. Stefanis

We study the asymptotic behaviour of the transverse momentum broadening distribution of an energetic quark or gluon propagating through dense QCD matter, in the large system size $L$ limit, taking into account radiative corrections in the…

高能物理 - 唯象学 · 物理学 2021-11-02 Paul Caucal

We discuss implications of the evolution of transverse momentum dependent (TMD) parton distributions on the structure of multi-jet states at high energies. In particular we analyze the theoretical systematics associated with multi-jet…

高能物理 - 唯象学 · 物理学 2021-09-20 A. Bermudez Martinez , F. Hautmann , M. L. Mangano

Cross sections for physical processes that involve very different momentum scales in the same process will involve large logarithms of the ratio of the momentum scales when calculated in perturbation theory. One goal of calculations using…

高能物理 - 唯象学 · 物理学 2010-04-23 Zoltan Nagy , Davison E. Soper

We compute the next-to-leading virtual QCD corrections to the partonic cross section of the production of a Higgs boson in association with a $Z$ boson in gluon fusion. The calculation is based on the recently introduced method of…

高能物理 - 唯象学 · 物理学 2023-01-11 Lina Alasfar , Giuseppe Degrassi , Pier Paolo Giardino , Ramona Gröber , Marco Vitti

The phenomenological approach in the framework of Quark-Gluon String Model (QGSM) has been applied to the description of transverse momentum spectra for the baryon production at colliders. The analysis of data on hyperon transverse momentum…

高能物理 - 唯象学 · 物理学 2018-11-12 Olga I. Piskounova

We study the resummation of soft gluon emission corrections to the production of a top-antitop pair in association with a Higgs boson at the Large Hadron Collider. Starting from a soft-gluon resummation formula derived in previous work, we…

高能物理 - 唯象学 · 物理学 2017-03-08 Alessandro Broggio , Andrea Ferroglia , Ben D. Pecjak , Li Lin Yang

We argue that the study of heavy quarkonia, in particular that of $\Upsilon$, produced back-to-back with an isolated photon in $pp$ collisions at the LHC is the best --and currently unique-- way to access the distribution of both the…

高能物理 - 唯象学 · 物理学 2014-06-11 Wilco J. den Dunnen , Jean-Philippe Lansberg , Cristian Pisano , Marc Schlegel