Zobrazeno 1 - 10
of 41
pro vyhledávání: '"Zhu, Yu Jiao"'
We study two-loop corrections to the scattering amplitude of four massive leptons in quantum electrodynamics. These amplitudes involve previously unknown elliptic Feynman integrals, which we compute analytically using the differential equation method
Externí odkaz:
http://arxiv.org/abs/2311.06385
Autor:
Duhr, Claude, Zhu, Yu Jiao
We report on the analytic computation of the 2-loop amplitude for Bhabha scattering in QED. We study the analytic structure of the amplitude, and reveal its underlying connections to hyperbolic Coxeter groups and arithmetic geometries of elliptic cur
Externí odkaz:
http://arxiv.org/abs/2310.00485
The rapidity anomalous dimension controls the scaling of transverse momentum dependent observables in the Sudakov region. In a conformal theory it is equivalent to the soft anomalous dimension, but in QCD this relation is broken by anomalous terms pr
Externí odkaz:
http://arxiv.org/abs/2205.02249
In this paper we calculate analytically the perturbative matching coefficients for unpolarized quark and gluon Transverse-Momentum-Dependent (TMD) Parton Distribution Functions (PDFs) and Fragmentation Functions (FFs) through Next-to-Next-to-Next-to-
Externí odkaz:
http://arxiv.org/abs/2012.03256
Autor:
Zhu, Yu Jiao
We study the soft behavior of QCD amplitudes with multiple hard legs and present a compact expression for double soft gluons and double soft quarks at one-loop. The color correlation of the current basically shows a dipole structure which couples to
Externí odkaz:
http://arxiv.org/abs/2009.08919
It is well-known that direct analytic continuation of DGLAP evolution kernel (splitting functions) from space-like to time-like kinematics breaks down at three loops. We identify the origin of this breakdown as splitting functions are not analytic fu
Externí odkaz:
http://arxiv.org/abs/2006.10534
Event shape observables have been widely used for precision QCD studies at various lepton and hadron colliders. We present the most accurate calculation of the transverse-energy-energy correlation event shape variable in deep-inelastic scattering. In
Externí odkaz:
http://arxiv.org/abs/2006.02437
Publikováno v:
Phys. Rev. Lett. 124, 092001 (2020)
We report a calculation of the perturbative matching coefficients for the transverse-momentum-dependent parton distribution functions for quark at the next-to-next-to-next-to-leading order in QCD, which involves calculation of non-standard Feynman in
Externí odkaz:
http://arxiv.org/abs/1912.05778
We calculate in this paper the perturbative gluon transverse momentum dependent parton distribution functions (TMDPDFs) and fragmentation functions (TMDFFs) using the exponential regulator for rapidity divergences. We obtain results for both unpolari
Externí odkaz:
http://arxiv.org/abs/1909.13820
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