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Determination of the strong coupling constant and the Collins-Soper kernel from the energy-energy correlator in $e^+e^-$ collisions

Autor: Kang, Zhong-Bo, Penttala, Jani, Zhang, Congyue

We perform, for the first time, a simultaneous global fit of the strong coupling constant $\alpha_s$ and the Collins-Soper (CS) kernel in the back-to-back limit of energy-energy correlators in $e^+ e^-$ collisions at next-to-next-to-next-to-leading l

Externí odkaz: http://arxiv.org/abs/2410.21435

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Non-perturbative Collins-Soper kernel: Chiral quarks and Coulomb-gauge-fixed quasi-TMD

Autor: Mukherjee, Swagato, Bollweg, Dennis, Gao, Xiang, Zhao, Yong

We present the first lattice QCD calculation of the rapidity anomalous dimension of transverse-momentum-dependent distributions (TMDs), i.e. the Collins-Soper (CS) kernel, employing the recently proposed Coulomb-gauge-fixed quasi-TMD formalism as wel

Externí odkaz: http://arxiv.org/abs/2407.10739

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Nonperturbative Collins-Soper Kernel from Chiral Quarks with Physical Masses

Autor: Bollweg, Dennis, Gao, Xiang, Mukherjee, Swagato, Zhao, Yong

Publikováno v: Phys.Lett.B 852 (2024) 138617

We present a lattice QCD calculation of the rapidity anomalous dimension of quark transverse-momentum-dependent distributions, i.e., the Collins-Soper (CS) kernel, up to transverse separations of about 1 fm. This unitary lattice calculation is conduc

Externí odkaz: http://arxiv.org/abs/2403.00664

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Determination of the Collins-Soper kernel from Lattice QCD

Autor: Avkhadiev, Artur, Shanahan, Phiala E., Wagman, Michael L., Zhao, Yong

This work presents a determination of the quark Collins-Soper kernel, which relates transverse-momentum-dependent parton distributions (TMDs) at different rapidity scales, using lattice quantum chromodynamics (QCD). This is the first such determinati

Externí odkaz: http://arxiv.org/abs/2402.06725

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Transformation of transverse momentum distributions from Parton Branching to Collins-Soper-Sterman framework

Autor: Martinez, Armando Bermudez

Publikováno v: Physics Letters B 845 (2023) 138182

Two main frameworks for defining transverse momentum dependent (TMD) parton densities are the Collins-Soper-Sterman (CSS) formalism, and the Parton Branching (PB) approach. While PB-TMDs have an explicit dependence on a single scale which is used to

Externí odkaz: http://arxiv.org/abs/2307.06704

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Collins-Soper kernel from lattice QCD at the physical pion mass

Autor: Avkhadiev, Artur, Shanahan, Phiala, Wagman, Michael, Zhao, Yong

Publikováno v: Phys. Rev. D 108, 114505 (2023)

This work presents a determination of the quark Collins-Soper kernel, which relates transverse-momentum-dependent parton distributions (TMDs) at different rapidity scales, using lattice Quantum Chromodynamics (QCD). This is the first lattice QCD calc

Externí odkaz: http://arxiv.org/abs/2307.12359

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Lattice Calculation of the Intrinsic Soft Function and the Collins-Soper Kernel

Autor: Lattice Parton Collaboration, Chu, Min-Huan, He, Jin-Chen, Hua, Jun, Liang, Jian, Ji, Xiangdong, Schäfer, Andreas, Shu, Hai-Tao, Su, Yushan, Walter, Lisa, Wang, Wei, Wang, Ji-Hao, Yang, Yi-Bo, Zeng, Jun, Zhang, Qi-An

Publikováno v: JHEP08(2023)172

We calculate the soft function using lattice QCD in the framework of large momentum effective theory incorporating the one-loop perturbative contributions. The soft function is a crucial ingredient in the lattice determination of light cone objects u

Externí odkaz: http://arxiv.org/abs/2306.06488

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