Speaker
Description
Jets play an important role in heavy-ion collisions, interacting with and thereby probing the quark-gluon plasma (QGP) as they propagate to the detector. The asymptotic mass, $m_{\infty}$ and the transverse scattering rate, $\mathcal{C}(k_{\perp})$ control this interaction insofar as they serve as input to calculations of transverse momentum broadening and medium-induced radiation. Both $m_{\infty}$ and $\mathcal{C}(k_{\perp})$ receive classical corrections, arising from the exchange of gluons distributed on the IR tail of the Bose-Einstein distribution.
In this talk, we describe how recent advances have shown that these classical corrections can be obtained from the lattice in dimensionally reduced Electrostatic QCD (EQCD) [1], which has in turn paved the way for their non-perturbative determination [2,3]. Based on [4], we explain how said EQCD determination needs to be supplemented with a perturbative calculation in full thermal QCD at $\mathcal{O}(g^2)$ to render the classical contribution finite, ridding it of unphysical UV divergences. We furthermore report on our progress towards the calculation of the rest of the $\mathcal{O}(g^2)$ contribution and provide an outlook on the potential impact on medium-induced radiation rates.
References:
[1] S. Caron-Huot, 0811.1603
[2] G.D. Moore, N. Schlusser, 2009.06614
[3] J. Ghiglieri, G.D. Moore, P. Schicho, N. Schlusser, 2112.01407
[4] J. Ghiglieri, P. Schicho, N. Schlusser, E. Weitz, 2312.11731
