Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2010-06-04
Phys.Rev.D83:114036,2011
Physics
High Energy Physics
High Energy Physics - Phenomenology
16 pages, 11 figures. One error corrected in equation (3.6). Slight simplifications and minor additions in the text, one Figur
Scientific paper
10.1103/PhysRevD.83.114036
Discussing the general case of a hard partonic production process, we show that the notion of parton energy loss is not always sufficient to fully address medium-induced gluon radiation. The broader notion of gluon radiation associated to a hard process has to be used, in particular when initial and final state radiation amplitudes interfere, making the medium-induced radiated energy different from the energy loss of any well-identified parton. Our arguments are first presented in an abelian QED model, and then applied to large-xF quarkonium hadroproduction. In this case, we show that the medium-induced radiated energy is qualitatively similar (but not identical) to the radiative energy loss of an "asymptotic massive parton" undergoing transverse momentum broadening when travelling through the nucleus. In particular, it scales as the incoming parton energy, which suggests to reconsider gluon radiation as a possible explanation of large-xF quarkonium suppression in p-A collisions. We expect a similar effect in open heavy-flavour and possibly light-hadron hadroproduction at large xF, depending on the precise definition of the nuclear suppression factor in the latter case.
Arleo François
Peigne Stéphane
Sami Taklit
No associations
LandOfFree
Revisiting scaling properties of medium-induced gluon radiation does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Revisiting scaling properties of medium-induced gluon radiation, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Revisiting scaling properties of medium-induced gluon radiation will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-722701