In-medium loop corrections and longitudinally polarized gauge bosons in high-energy showers
Abstract
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 Landau-Pomeranchuk-Migdal (LPM) effect. 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 soft-emission approximations. In this particular paper, we show (i) how the “instantaneous” interactions of Light-Cone Perturbation Theory must be included in the calculation to account for effects of longitudinally-polarized gauge bosons in intermediate states, and (ii) how to compute virtual corrections to LPM emission rates, which will be necessary in order to make infrared-safe calculations of the characteristics of in-medium QCD showering of high-energy partons. In order to develop these topics in as simple a context as possible, we will focus in the current paper not on QCD but on large-Nf QED, where Nf is the number of electron flavors.
- Authors:
-
- Univ. of Virginia, Charlottesville, VA (United States)
- Quaid-i-Azam Univ. (Pakistan)
- Publication Date:
- Research Org.:
- Univ. of Virginia, Charlottesville, VA (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC), High Energy Physics (HEP)
- OSTI Identifier:
- 1611005
- Grant/Contract Number:
- SC0007984
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Journal of High Energy Physics (Online)
- Additional Journal Information:
- Journal Name: Journal of High Energy Physics (Online); Journal Volume: 2018; Journal Issue: 12; Journal ID: ISSN 1029-8479
- Publisher:
- Springer Berlin
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; Quark-Gluon Plasma; Perturbative QCD
Citation Formats
Arnold, Peter, and Iqbal, Shahin. In-medium loop corrections and longitudinally polarized gauge bosons in high-energy showers. United States: N. p., 2018.
Web. doi:10.1007/JHEP12(2018)120.
Arnold, Peter, & Iqbal, Shahin. In-medium loop corrections and longitudinally polarized gauge bosons in high-energy showers. United States. https://doi.org/10.1007/JHEP12(2018)120
Arnold, Peter, and Iqbal, Shahin. Wed .
"In-medium loop corrections and longitudinally polarized gauge bosons in high-energy showers". United States. https://doi.org/10.1007/JHEP12(2018)120. https://www.osti.gov/servlets/purl/1611005.
@article{osti_1611005,
title = {In-medium loop corrections and longitudinally polarized gauge bosons in high-energy showers},
author = {Arnold, Peter 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 Landau-Pomeranchuk-Migdal (LPM) effect. 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 soft-emission approximations. In this particular paper, we show (i) how the “instantaneous” interactions of Light-Cone Perturbation Theory must be included in the calculation to account for effects of longitudinally-polarized gauge bosons in intermediate states, and (ii) how to compute virtual corrections to LPM emission rates, which will be necessary in order to make infrared-safe calculations of the characteristics of in-medium QCD showering of high-energy partons. In order to develop these topics in as simple a context as possible, we will focus in the current paper not on QCD but on large-Nf QED, where Nf is the number of electron flavors.},
doi = {10.1007/JHEP12(2018)120},
journal = {Journal of High Energy Physics (Online)},
number = 12,
volume = 2018,
place = {United States},
year = {Wed Dec 19 00:00:00 EST 2018},
month = {Wed Dec 19 00:00:00 EST 2018}
}
Web of Science
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