Speaker
Pol Gossiaux
(Subatech)
Description
Recently, we have proposed a microscopic approach for the quenching and thermalisation of heavy quarks (HQ) in URHIC \cite{Gossiaux:2008,Gossiaux:2009,Gossiaux:2010}, assuming that
they interact with light partons through both elastic and radiative processes evaluated by resorting to some parameterization of the running coupling constant, while those partons are spatially distributed along hydrodynamical evolution of the hot medium. This approach is able to explain successfully several observables measured at RHIC, such as a) the nuclear modification factor and the elliptic flow of non-photonic single electrons and b) the nuclear modification factor of D mesons presented by STAR at QM 2012. We will discuss the predictions of our model for D and B mesons production in URHIC at LHC energies and confront them with experimental results obtained so far by ALICE and CMS collaborations for Pb-Pb collisions at $\sqrt{s}=2.76~{\rm TeV}$.
Since \cite{Bluhm:2011}, our interest has been triggered on the effect of an absorptive medium on radiative energy loss and more specifically on its implications on the standard LPM
\cite{LPM} effect. We have advocated that the large time needed for the photon formation in Bremsstrahlung from ultrarelativistic charges is not affordable if damping is taken into account. Similar effect manifests itself in QCD, as we have recently advocated in \cite{Bluhm_2012}. It has possible implications on the quenching of D mesons in URHIC that will be discussed in this talk, focusing on observables such as nuclear modification factor and correlations.
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\begin{thebibliography}{9}
\bibitem{Gossiaux:2008}
P.B. Gossiaux, J. Aichelin, Phys. Rev. C{\bf 78}, 014904 (2008), [hep-ph/0802.2525].
\bibitem{Gossiaux:2009}
P.B. Gossiaux, R. Bierkandt, J. Aichelin, Physical Review C{\bf 79} (2009) 044906
\bibitem{Gossiaux:2010}
P.B. Gossiaux, V. Guiho, J. Aichelin, J. Phys. G: Nucl. Part. Phys. {\bf 37} (2010) 094019
\bibitem{Gossiaux:2011}
P.B. Gossiaux et al., arXiv:1102.1114
\bibitem{Bluhm:2011}
M. Bluhm, P.B. Gossiaux, and J. Aichelin, arXiv:1106.2856, PRL {\bf 107} (2011) 265004
\bibitem{LPM}
L.D. Landau and I. Ya. Pomeranchuk, Dokl. Akad. Nauk SSSR {\bf 92} (1953) 535; ibid. {\bf 92} (1953) 735.
\bibitem{Bluhm_2012}
M. Bluhm, P. B. Gossiaux, T. Gousset, J. Aichelin,[arXiv:1204.2469v1]
\end{thebibliography}
Primary author
Pol Gossiaux
(Subatech)
Co-authors
Joerg Aichelin
(Unknown)
Dr
Marcus Bluhm
(SUBATECH Nantes)
Dr
Marlene Nahrgang
Prof.
Thierry Gousset
(Subatech)
