The LPM effect in sequential bremsstrahlung: 4gluon vertices
The splitting processes of bremsstrahlung and pair production in a medium are coherent over large distances in the very high energy limit, which leads to a suppression known as the LandauPomeranchukMigdal (LPM) effect. In this paper, we continue study of the case when the coherence lengths of two consecutive splitting processes overlap (which is important for understanding corrections to standard treatments of the LPM effect in QCD), avoiding softgluon approximations. In particular, this paper completes the calculation of the rate for real double gluon bremsstrahlung from an initial gluon with various simplifying assumptions (thick media; qˆ approximation; and large N _{c}) by now including processes involving 4gluon vertices.
 Authors:

^{[1]};
^{[1]};
^{[2]}
 Univ. of Virginia, Charlottesville, VA (United States)
 QuaidiAsam Univ. Campus, Islamabad (Pakistan)
 Publication Date:
 Grant/Contract Number:
 SC0007984
 Type:
 Accepted Manuscript
 Journal Name:
 Journal of High Energy Physics (Online)
 Additional Journal Information:
 Journal Name: Journal of High Energy Physics (Online); Journal Volume: 2016; Journal Issue: 10; Journal ID: ISSN 10298479
 Publisher:
 Springer Berlin
 Research Org:
 Univ. of Virginia, Charlottesville, VA (United States)
 Sponsoring Org:
 USDOE
 Country of Publication:
 United States
 Language:
 English
 Subject:
 72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
 OSTI Identifier:
 1425922
Arnold, Peter, Chang, HanChih, and Iqbal, Shahin. The LPM effect in sequential bremsstrahlung: 4gluon vertices. United States: N. p.,
Web. doi:10.1007/JHEP10(2016)124.
Arnold, Peter, Chang, HanChih, & Iqbal, Shahin. The LPM effect in sequential bremsstrahlung: 4gluon vertices. United States. doi:10.1007/JHEP10(2016)124.
Arnold, Peter, Chang, HanChih, and Iqbal, Shahin. 2016.
"The LPM effect in sequential bremsstrahlung: 4gluon vertices". United States.
doi:10.1007/JHEP10(2016)124. https://www.osti.gov/servlets/purl/1425922.
@article{osti_1425922,
title = {The LPM effect in sequential bremsstrahlung: 4gluon vertices},
author = {Arnold, Peter and Chang, HanChih and Iqbal, Shahin},
abstractNote = {The splitting processes of bremsstrahlung and pair production in a medium are coherent over large distances in the very high energy limit, which leads to a suppression known as the LandauPomeranchukMigdal (LPM) effect. In this paper, we continue study of the case when the coherence lengths of two consecutive splitting processes overlap (which is important for understanding corrections to standard treatments of the LPM effect in QCD), avoiding softgluon approximations. In particular, this paper completes the calculation of the rate for real double gluon bremsstrahlung from an initial gluon with various simplifying assumptions (thick media; qˆ approximation; and large Nc) by now including processes involving 4gluon vertices.},
doi = {10.1007/JHEP10(2016)124},
journal = {Journal of High Energy Physics (Online)},
number = 10,
volume = 2016,
place = {United States},
year = {2016},
month = {10}
}