Speaker
Dr
Marcus Bluhm
(SUBATECH Nantes)
Description
In theoretical studies of medium-induced energy loss, it is
commonly accepted that the radiative energy loss contribution
dominates over the collisional. In these approaches, however,
the influence of a damping of bremsstrahlung quanta, leading
to a finite lifetime of the latter, has so far been neglected.
In this talk it is argued that in an absorptive and polarizable
plasma the radiative energy loss becomes significantly affected,
in particular, for charges with high initial energy [1]. This
is because damping mechanisms in the absorptive medium may
influence the formation of radiation itself, prominently, in
the case of large formation times. In this case, any suppression
of the associated radiation spectrum has to be attributed to
absorption rather than to coherence effects [2].
[1] M. Bluhm, P. B. Gossiaux, J. Aichelin, Phys. Rev. Lett. 107,
265004 (2011).
[2] M. Bluhm, P. B. Gossiaux, T. Gousset, J. Aichelin,
arXiv:1204.2469 [hep-ph].
Author
Dr
Marcus Bluhm
(SUBATECH Nantes)
