Work

Fragmentation functions for lepton pairs

Year: 2002

Type: article

Abstract: We calculate the fragmentation function for a light quark to decay into a lepton pair to leading order in the QCD coupling constant. In the formal definition of the fragmentation function, a QED phase must be included in the eikonal factor to guarantee QED gauge invariance. We find that the longitudinal polarization fraction is a decreasing function of the factorization scale, in accord with the intuitive expectation that the virtual photon should behave more and more like a real photon as the transverse momentum of the fragmenting quark increases.

Source: Physical review. D. Particles, fields, gravitation, and cosmology/Physical review. D. Particles and fields

DOI: 10.1103/physrevd.65.034005

Authors: Eric Braaten, Jungil Lee

Institutions: The Ohio State University, Deutsches Elektronen-Synchrotron DESY

Language: English

Topic: Particle physics theoretical and experimental studies

Subfield: Nuclear and High Energy Physics

Field: Physics and Astronomy

Domain: Physical Sciences

Open Access status: green

OpenAlex ID: W2020511646

FWCI: 0.555

Cites: 19

Cited by: 9

Related to: 10