Drag induced radiative loss from semi-hard heavy quarks

Abstract

The case of gluon bremsstrahlung off a heavy quark in extended nuclear matter is revisited within the higher twist formalism. In particular, the in-medium modification of "semi-hard" heavy quarks is studied, where the momentum of the heavy quark is larger but comparable to the mass of the heavy quark ($p\gtrsim M$). In contrast to all prior calculations, where the gluon emission spectrum is entirely controlled by the transverse momentum diffusion parameter ($\hat{q}$), both for light and heavy quarks, in this work, we demonstrate that the gluon emission spectrum for a heavy quark (unlike that for flavors) is also sensitive to $\hat{e}$, which so far has been used to quantify the amount of light-cone drag experienced by a parton. This mass dependent effect, due to the non-light-like momentum of a semi-hard heavy-quark, leads to an additional energy loss term for heavy-quarks, while resulting in a negligible modification of light flavor (and high energy heavy flavor) loss. This result can be used to estimate the value of this sub-leading non-perturbative jet transport parameter ($\hat{e}$) from heavy flavor suppression in ultra-relativistic heavy-ion collisions.

Updated version

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Cited by in corpus (14)

• A non-perturbative estimate of the heavy quark momentum diffusion coefficient
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• Drag Induced Radiation and Multi-Stage Effects in Heavy-Flavor Energy Loss
• Multi-scale evolution of charmed particles in a nuclear medium
• Hard jet substructure in a multistage approach
• Multi-stage evolution of heavy quarks in the quark-gluon plasma
• Open Heavy Flavors in Nuclear Collisions: Theory Overview
• Medium-induced gluon emission via transverse and longitudinal scattering in dense nuclear matter
• Heavy Quark Radiation in the Quark-Gluon Plasma in the Moliere Theory: Angular Distribution of the Radiation
• Heavy quark diffusion and radiation at intermediate momentum
• Reexamining charm versus bottom quark energy loss inside a color-deconfined medium
• Probing the multi-scale dynamical interaction between heavy quarks and the QGP using JETSCAPE
• Effects of drag induced radiation and multi-stage evolution on heavy quark energy loss
• Glauber quark and gluon contributions to quark energy loss at next-to-leading order and next-to-leading twist