Bottomonium melting from a stochastic potential

20 May 2014, 16:30
spectrum (darmstadtium)



Board: F-47
Poster Open Heavy Flavour and Quarkonia Poster session


Alexander Rothkopf (H)


Understanding the suppression patterns of heavy Quarkonium promises valuable insight into the quark-gluon plasma created in relativistic heavy-ion collisions at RHIC and LHC. Here we present simulations of Bottomonium real-time evolution [1] in an idealized, i.e. static, QGP at high temperature, based on the open-quantum systems concept of stochastic potential [2]. If a heavy Quarkonium bound state is submerged in the QGP, it is subject to screening and scattering from the surrounding light partons. Effective field theory tells us that under such circumstances its correlation function obeys a Schrödinger equation with a complex potential V(r). We interpret the resulting loss of correlations with the initial state, i.e. the presence of Im[V], as decoherence, which is induced by the thermal fluctuations of the medium. To incorporate this phenomenon into the non-relativistic description, we use a purely real potential, whose values are stochastically varied at each time step by purely real noise. It is the spatial noise correlations that are then intimately related to Im[V]. Based on this setup, we discuss the intricate interplay between state mixing and thermal (de-)excitations, which governs the real-time evolution of Bottomonium vacuum initial states, as they propagate in the QGP. [1] A.R. arXiv:1312.3246 submitted to JHEP
[2] Y.Akamatsu and A.R. Phys.Rev. D85 (2012) 105011

Primary author

Alexander Rothkopf (H)

Presentation Materials