Mass effect and coherence in medium-induced QCD radiation off a q(q)over-bar antenna
(2011) In Journal of Physics G: Nuclear and Particle Physics 38(12).- Abstract
- The medium-induced one-gluon radiation spectrum off a massive quark-antiquark (q (q) over bar) antenna traversing a colored QCD medium is calculated in this contribution. The gluon spectrum off the antenna computed at first order in the opacity expansion is collinear finite but infrared divergent, which is different from the result obtained from an independent emitter which is both infrared and collinear finite. The interference between emitters dominates the soft gluon radiation when the antenna opening angle is small and the emitted gluon is soft, whereas the antenna behaves like a superposition of independent emitters when the opening angle is large and the radiated gluon is hard. As a phenomenological consequence, we investigate the... (More)
- The medium-induced one-gluon radiation spectrum off a massive quark-antiquark (q (q) over bar) antenna traversing a colored QCD medium is calculated in this contribution. The gluon spectrum off the antenna computed at first order in the opacity expansion is collinear finite but infrared divergent, which is different from the result obtained from an independent emitter which is both infrared and collinear finite. The interference between emitters dominates the soft gluon radiation when the antenna opening angle is small and the emitted gluon is soft, whereas the antenna behaves like a superposition of independent emitters when the opening angle is large and the radiated gluon is hard. As a phenomenological consequence, we investigate the energy lost by the projectiles due to the radiation. In general, the size of the mass effects is similar in both cases. (Less)
Please use this url to cite or link to this publication:
https://lup.lub.lu.se/record/2863472
- author
- Armesto, Nestor ; Ma, Hao ; Mehtar-Tani, Yacine ; Salgado, Carlos A. and Tywoniuk, Konrad LU
- organization
- publishing date
- 2011
- type
- Contribution to journal
- publication status
- published
- subject
- in
- Journal of Physics G: Nuclear and Particle Physics
- volume
- 38
- issue
- 12
- publisher
- IOP Publishing
- external identifiers
-
- wos:000304375300140
- scopus:84055193321
- ISSN
- 0954-3899
- DOI
- 10.1088/0954-3899/38/12/124140
- language
- English
- LU publication?
- yes
- id
- 8b0c5bca-aaf5-48b7-bc89-fa883a30d042 (old id 2863472)
- date added to LUP
- 2016-04-01 14:59:50
- date last changed
- 2022-12-12 02:45:05
@article{8b0c5bca-aaf5-48b7-bc89-fa883a30d042,
abstract = {{The medium-induced one-gluon radiation spectrum off a massive quark-antiquark (q (q) over bar) antenna traversing a colored QCD medium is calculated in this contribution. The gluon spectrum off the antenna computed at first order in the opacity expansion is collinear finite but infrared divergent, which is different from the result obtained from an independent emitter which is both infrared and collinear finite. The interference between emitters dominates the soft gluon radiation when the antenna opening angle is small and the emitted gluon is soft, whereas the antenna behaves like a superposition of independent emitters when the opening angle is large and the radiated gluon is hard. As a phenomenological consequence, we investigate the energy lost by the projectiles due to the radiation. In general, the size of the mass effects is similar in both cases.}},
author = {{Armesto, Nestor and Ma, Hao and Mehtar-Tani, Yacine and Salgado, Carlos A. and Tywoniuk, Konrad}},
issn = {{0954-3899}},
language = {{eng}},
number = {{12}},
publisher = {{IOP Publishing}},
series = {{Journal of Physics G: Nuclear and Particle Physics}},
title = {{Mass effect and coherence in medium-induced QCD radiation off a q(q)over-bar antenna}},
url = {{http://dx.doi.org/10.1088/0954-3899/38/12/124140}},
doi = {{10.1088/0954-3899/38/12/124140}},
volume = {{38}},
year = {{2011}},
}