Heavy-meson diffusion in hadronic matter

20 May 2014, 16:30
spectrum (darmstadtium)



Board: F-54
Poster Open Heavy Flavour and Quarkonia Poster session


Dr Juan Torres-Rincon (Institut de Ciencies de l'Espai)


Heavy mesons can be reconstructed in high-energy ion collisions from the detected electrons coming from their semileptonic decays. Due the their large mass ($m_D,m_B \gg \Lambda_{QCD}$) they carry important information about the initial stages of the heavy-ion collision. In particular, the $D$-meson $R_{AA}$ and $v_2$ have already been extracted in the RHIC and the LHC. These out-of-equilibrium observables strongly depend on the heavy-meson transport properties. We present theoretical results on the transport coefficients of $D$ and $B$ mesons in a hadronic medium as a function of temperature and baryochemical potential. In particular, we focus on the diffusion coefficients, drag force, energy loss and the heavy-meson relaxation time. To compute them, we implement a transport equation in the Fokker-Planck limit applied to a thermal medium composed by $\pi$, $K$, $\bar{K}$, $\eta$, $N$ and $\Delta$ baryons, with whom the $D$ and $B$ mesons can interact. The (elastic+inelastic) interaction is extracted from effective field theories consistent with chiral and heavy-quark spin symmetries. We incorporate a unitarization method to exactly restore the $S$-matrix unitarity and to account for a set of dynamically generated resonances ($D_0$, $D_1$, $B_0$, $B_1$, $\Lambda_c$, $\Sigma_c$, $\Lambda_b$, $\Sigma_b$...) that are systematically taken into account in the transport computation. We focus our investigations to physics at vanishing net-baryon density (for physics at the RHIC and the LHC) but also for physics at finite baryochemical potential (for the future FAIR conditions).
On behalf of collaboration: None

Primary author

Dr Juan Torres-Rincon (Institut de Ciencies de l'Espai)

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