Speaker
Description
Jets originating from hard-scattered partons from the early stages of heavy-ion collisions travel through the Quark Gluon Plasma (QGP) and are modified or quenched relative to a p+p collision baseline. Moments of the jet’s transverse momentum, $p_{\text{T}}$, profile in the $ \eta - \varphi $ plane relative to the jet axis, called generalized jet angularities $\lambda_\alpha^\kappa$, are an important class of jet substructure observables to study in-medium modifications of the jet’s radiation and fragmentation patterns. While previous measurements of these angularities were performed for inclusive jets in heavy-ion collisions at the LHC, similar measurements at RHIC will probe jet quenching in complementary regions of phase space, offering new insights. Performing these measurements for inclusive and $D^0$ meson-tagged jets in Au+Au collisions will provide new opportunities to investigate in-medium modifications of jet substructure and quark fragmentation for both light and heavy flavors.
In this contribution, we report on the first measurements of nuclear modification factor as a function of different generalized angularities for heavy flavor jets in heavy-ion collisions. The fully-corrected generalized jet angularities, such as Les Houches Angularity $\lambda^1_{0.5}$, girth $\lambda^1_1$, or thrust $\lambda_2^1$ are measured for both inclusive and $D^0$ meson-tagged jets in Au+Au collisions at $\sqrt{s_{\text{NN}}} = 200$ GeV, collected by the STAR experiment at RHIC. These results can provide insight into mass-dependent effects and will help distinguish between various models of jet quenching, and light and heavy flavor quark in-medium energy loss.
| Category | Experiment |
|---|---|
| Collaboration (if applicable) | STAR |
