☆ 4.7 Article

Generalized TMDs and the exclusive double Drell-Yan process

PHYSICS LETTERS B (2017)

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PHYSICS LETTERS B

卷 771, 期 -, 页码 396-400

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DOI: 10.1016/j.physletb.2017.05.081

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Astronomy & Astrophysics Physics, Nuclear Physics, Particles & Fields

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National Science Foundation [PHY-1516088]
National Science Foundation of China [11675093]
Thousand Talents Plan for Young Professionals
U.S. Department of Energy, Office of Science, Office of Nuclear Physics

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Generalized transverse momentum dependent parton distributions (GTMDs) are the most general parton correlation functions of hadrons. By considering the exclusive double Drell-Yan process it is shown for the first time how quark GTMDs can be measured. Specific GTMDs can be addressed by means of polarization observables. (C) 2017 The Authors. Published by Elsevier B.V.

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Seidl, S. Sekula, K. Semenov-Tian-Shanskiy, D. Y. Shao, N. Sherrill, E. Sichtermann, M. Siddikov, A. Signori, B. K. Singh, S. Sirca, K. Slifer, W. Slominski, D. Sokhan, W. E. Sondheim, Y. Song, O. Soto, H. Spiesberger, A. M. Stasto, P. Stepanov, G. Sterman, J. R. Stevens, I. W. Stewart, I Strakovsky, M. Strikman, M. Sturm, M. L. Stutzman, M. Sullivan, B. Surrow, P. Svihra, S. Syritsyn, A. Szczepaniak, P. Sznajder, H. Szumila-Vance, L. Szymanowski, A. S. Tadepalli, J. D. Tapia Takaki, G. F. Tassielli, J. Terry, F. Tessarotto, K. Tezgin, L. Tomasek, F. Torales Acosta, P. Tribedy, A. Tricoli, Triloki, S. Tripathi, R. L. Trotta, O. D. Tsai, Z. Tu, C. Tuve, T. Ullrich, M. Ungaro, G. M. Urciuoli, A. Valentini, P. Vancura, M. Vandenbroucke, C. Van Hulse, G. Varner, R. Venugopalan, I Vitev, A. Vladimirov, G. Volpe, A. Vossen, E. Voutier, J. Wagner, S. Wallon, H. Wang, Q. Wang, X. Wang, S. Y. Wei, C. Weiss, T. Wenaus, H. Wennlof, N. Wickramaarachchi, A. Wikramanayake, D. Winney, C. P. Wong, C. Woody, L. Xia, B. W. Xiao, J. Xie, H. Xing, Q. H. Xu, J. Zhang, S. Zhang, Z. Zhang, Z. W. Zhao, Y. X. Zhao, L. Zheng, Y. Zhou, P. Zurita

Summary: This report describes the physics case, detector requirements, and evolving detector concepts for the Electron-Ion Collider (EIC) experimental program. The EIC will be a new facility in the United States with the capability to collide high-energy electron beams with high-energy proton and ion beams, providing access to regions dominated by gluons. The use of polarized beams in the EIC will allow for unprecedented access to the spatial and spin structure of particles. The report aims to advance the physics program and develop detector concepts that meet the requirements for the EIC.

NUCLEAR PHYSICS A (2022)

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Article Astronomy & Astrophysics

Exclusive double quarkonium production and generalized TMDs of gluons

Shohini Bhattacharya, Andreas Metz, Vikash Kumar Ojha, Jeng-Yuan Tsai, Jian Zhou

Summary: Being the mother distributions of all types of two-parton correlation functions, generalized transverse momentum dependent parton distributions (GTMDs) have attracted a lot of attention. We argue that exclusive double production of pseudoscalar quarkonia (eta c or eta b) in nucleon-nucleon collisions gives access to GTMDs of gluons.

PHYSICS LETTERS B (2022)

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Article Astronomy & Astrophysics

Chiral and trace anomalies in deeply virtual Compton scattering

Shohini Bhattacharya, Yoshitaka Hatta, Werner Vogelsang

Summary: Inspired by previous work, this paper calculates one-loop quark box diagrams in polarized and unpolarized deep inelastic scattering (DIS) using off-forward momentum l_mu as an infrared regulator. The authors derive the pole 1/l^2 associated with the axial anomaly in the polarized case and obtain the logarithmic term and DIS coefficient function. The results are interpreted in terms of generalized parton distributions (GPDs) H and E, shedding light on the violation of QCD factorization and the connection between gravitational form factors and the gluon condensate operator F_mu_nu F_mu_nu. Remarkably, poles related to the trace anomaly are found in the unpolarized case but are canceled by massless glueball poles in GPDs and their moments.

PHYSICAL REVIEW D (2023)

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Article Astronomy & Astrophysics

Chiral-even axial twist-3 GPDs of the proton from lattice QCD

Shohini Bhattacharya, Krzysztof Cichy, Martha Constantinou, Jack Dodson, Andreas Metz, Aurora Scapellato, Fernanda Steffens

Summary: This work presents the first lattice-QCD calculation of twist-3 axialquark generalized parton distributions (GPDs) for the proton using the large-momentum effective theory approach. The matrix elements are calculated for different proton momenta and the light-cone GPDs are defined in the symmetric frame.

PHYSICAL REVIEW D (2023)

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Article Astronomy & Astrophysics

Generalized parton distributions from lattice QCD with asymmetric momentum transfer: Unpolarized quarks

Shohini Bhattacharya, Krzysztof Cichy, Martha Constantinou, Jack Dodson, Xiang Gao, Andreas Metz, Swagato Mukherjee, Aurora Scapellato, Fernanda Steffens, Yong Zhao

Summary: Traditionally, lattice QCD computations of generalized parton distributions (GPDs) have been carried out in a symmetric frame. In this work, a quasidistribution approach is proposed to perform lattice QCD calculations of GPDs in asymmetric frames, which leads to faster and more effective computations. The Lorentz covariant parametrization of matrix elements and a new definition of quasi-GPDs are used to relate matrix elements in different frames and reduce power corrections. Numerical calculations are performed, demonstrating the efficacy of the formalism and obtaining results for the twist-2 light-cone GPDs H and E for unpolarized quarks.

PHYSICAL REVIEW D (2022)

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Article Astronomy & Astrophysics

Burkhardt-Cottingham-type sum rules for light-cone and quasi-PDFs

Shohini Bhattacharya, Andreas Metz

Summary: In this study, we perform a perturbative check of the BC-type sum rules in the quark target model and the Yukawa model, and find that the BC-type sum rules hold for dimensional regularization (DR) but are generally violated when using a cutoff.

PHYSICAL REVIEW D (2022)

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Article Astronomy & Astrophysics

First global QCD analysis of the TMD g1T from semi-inclusive DIS data

Shohini Bhattacharya, Zhong-Bo Kang, Andreas Metz, Gregory Penn, Daniel Pitonyak

Summary: We present the first simultaneous extraction of the worm-gear transverse momentum dependent function g(1T) from all available experimental measurements, and compare it with different theoretical approaches using Monte Carlo techniques.

PHYSICAL REVIEW D (2022)

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Article Astronomy & Astrophysics

Parton distribution functions beyond leading twist from lattice QCD: The hL (x) case

Shohini Bhattacharya, Krzysztof Cichy, Martha Constantinou, Andreas Metz, Aurora Scapellato, Fernanda Steffens

Summary: In this study, the isovector flavor combination of the chiral-odd twist-3 parton distribution h(L) (x) for the proton was calculated rapidly using lattice QCD techniques. The results were renormalized nonperturbatively and presented in the (MS) over bar scheme at the scale of 2 GeV. Additionally, the transversity distribution h(1) (x) was also computed and compared to its Wandzura-Wilczek approximation.

PHYSICAL REVIEW D (2021)

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Article Astronomy & Astrophysics

The role of zero-mode contributions in the matching for the twist-3 PDFs e(x) and hL(x)

Shohini Bhattacharya, Krzysztof Cichy, Martha Constantinou, Andreas Metz, Aurora Scapellato, Fernanda Steffens

PHYSICAL REVIEW D (2020)

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Article Astronomy & Astrophysics

Insights on proton structure from lattice QCD: The twist-3 parton distribution function gT(x)

Shohini Bhattacharya, Krzysztof Cichy, Martha Constantinou, Andreas Metz, Aurora Scapellato, Fernanda Steffens

PHYSICAL REVIEW D (2020)

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Article Astronomy & Astrophysics

Exploring twist-2 GPDs through quasidistributions in a diquark spectator model

Shohini Bhattacharya, Christopher Cocuzza, Andreas Metz

PHYSICAL REVIEW D (2020)

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Article Astronomy & Astrophysics

One-loop matching for the twist-3 parton distribution gT(x)

Shohini Bhattacharya, Krzysztof Cichy, Martha Constantinou, Andreas Metz, Aurora Scapellato, Fernanda Steffens

PHYSICAL REVIEW D (2020)

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Article Astronomy & Astrophysics

Inhomogeneity of a rotating quark-gluon plasma from holography

Nelson R. F. Braga, Octavio C. Junqueira

Summary: This study investigates the influence of rotation on the transition temperature of strongly interacting matter produced in non-central heavy ion collisions. By using a holographic description of an AdS black hole, the authors extend the analysis to the more realistic case where the matter spreads over a region around the rotational axis. The results show the coexistence of confined and deconfined phases and are consistent with the concept of local temperature in rotating frames developed by Tolman and Ehrenfest.

PHYSICS LETTERS B (2024)

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Article Astronomy & Astrophysics

Constrain the time variation of the gravitational constant via the propagation of gravitational waves

Bing Sun, Jiachen An, Zhoujian Cao

Summary: This paper investigates the effect of gravitational constant variation on the propagation of gravitational waves. By employing two analytical methods, the study finds that variations in the gravitational constant result in amplitude and phase corrections for gravitational waves, and the time variation of the gravitational constant can be constrained through the propagation of gravitational waves.

PHYSICS LETTERS B (2024)

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Article Astronomy & Astrophysics

Quantum tunneling from Schwarzschild black hole in non-commutative gauge theory of gravity

Abdellah Touati, Zaim Slimane

Summary: This letter presents the first study of Hawking radiation as a tunneling process within the framework of non-commutative gauge theory of gravity. The non-commutative Schwarzschild black hole is reconstructed using the Seiberg-Witten map and the star product. The emission spectrum of outgoing massless particles is computed using the quantum tunneling mechanism. The results reveal pure thermal radiation in the low-frequency scenario, but a deviation from pure thermal radiation in the high-frequency scenario due to energy conservation. It is also found that noncommutativity enhances the correlations between successively emitted particles.

PHYSICS LETTERS B (2024)

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Article Astronomy & Astrophysics

Compact stars: To cross or go around? That is the question

Shahar Hod

Summary: The travel times of light signals between two antipodal points on a compact star's surface are calculated for two different trajectories. It is shown that, for highly dense stars, the longer trajectory along the surface may have a shorter travel time as measured by asymptotic observers. A critical value of the dimensionless density-area parameter is determined for constant density stars to distinguish cases where crossing through the star's center or following a semi-circular trajectory on the surface has a shorter travel time as measured by asymptotic observers.

PHYSICS LETTERS B (2024)

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