Abstract
In these proceedings, we review the production of both light and heavy flavor dijets in heavy ion collisions and highlight a promising observable to expose their distinct signatures. We propose the modification of dijet invariant mass distributions in heavy ion collisions as a new observable that exhibits striking sensitivity to the heavy quark mass dependence of in-medium parton showers. This observable has the advantage of amplifying the effects of jet quenching in contrast to conventional observables, such as the dijet momentum imbalance shift, which involve cancellations of such effects and, hence, result in less pronounced signals. Predictions are presented for Au+Au collisions at √SNN = 200 GeV to guide the future sPHENIX program at the Relativistic Heavy Ion Collider.
Highlights
Heavy flavor jets are a new frontier in the hard probes thrust of the ultra-relativistic nuclear collisions program
A clear advantage that heavy flavor dijets have over single inclusive heavy flavor jets is that they are predominately initiated by Q + Qpairs in the final partonic state [1, 2], whereas single jets receive large contributions from prompt gluons – splitting to heavy quarks only in later stages of the showering process [3, 4]
We have reviewed the recent predictions for the modification of the dijet mass distribution in heavy ion collisions [1]
Summary
Heavy flavor jets are a new frontier in the hard probes thrust of the ultra-relativistic nuclear collisions program. This means that the study of the modification of dijet observables provides direct information about heavy flavor energy loss mechanisms in the medium, while single jet observables reflect those of light partons, as has been experimentally verified by the CMS collaboration [5] In performing such measurements, experimentalists typically focus on the most energetic jet, the so-called “leading” jet, and the second most energetic jet, the “subleading” jet, of a given event [6,7,8]. We will focus on two dijet observables to be utilized at the future sPHENIX experiment at RHIC: the traditional modification of the dijet imbalance distribution and the newly proposed modification of the dijet mass distribution [1]
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