Gauge-invariance in hadronic scattering processes
C. J. Bomhof
Abstract
High energy hadronic scattering processes can be described in terms of partonic scattering processes and parton distribution and fragmentation functions. These are bilocal matrix elements of quark operators. Colour gauge-invariance requires inclusion of a gauge link, which is characterized by its path. For transverse momentum dependent distribution and fragmentation functions, appearing in single spin asymmetries, different paths appear depending on the process. The difference is related to a time-reversal odd gluonic pole matrix element. We discuss briefly the path structure of the gauge link in more complicated processes.
Create a lesson
Related papers
Comment on "Long-range magnetic fields in the ground state of the Standard Model plasma"
Jingwei Wang, Yiming Liu, Ligong Bian
Semiparametric Estimation of Physics Parameters and Parton Distribution Functions
Huanbiao Zhu, Jaco ter Hoeve, Mikael Kuusela et al.
Observable gravitational waves from unstable ALP catastrogenesis
Graciela B. Gelmini, Jonah Hyman, Yu Watanabe
Revisiting the gamma-ray signal from light ALPs emitted during the evaporation of memory-burdened PBHs
Cheng-Rui Jiang, Tong Li
Holographic spin alignment of vector mesons in a spinning black-hole background
Fei Wang, Zi-qiang Zhang
Modeling a Framework for Comprehensive Analysis of p\!A Transverse Analyzing Power Measurements at the RHIC HJET
Andrei Poblaguev