论文标题
重离子碰撞中喷气子结构的有效现场理论
Effective Field Theory for jet substructure in heavy ion collisions
论文作者
论文摘要
我开发了一个有效的现场理论（EFT）框架，以计算重离子碰撞实验的JET子结构可观察物。作为例证，我认为伴随着弱耦合的夸克Gluon等离子体（QGP）培养基形成的Dijet事件在沉重的离子碰撞中，观察对喷气选择偏置的观察不敏感的差异：同时测量JET质量的质量，以及在驱动器之间进行横向动量的横向动量，以删除软辐射的跨度无效。将喷射视为一个开放量子系统，我在向前散射状态中的cot（软共线理论）框架内写下一个分解公式。培养基的物理学是在通用软场相关器中编码的，而媒介物相互作用则由培养基诱导的喷射功能捕获。分解公式导致lindblad类型方程，用于在马尔可夫近似中射流的降低密度基质的演化。该方程的解决方案允许重新召集大型对数，这些对数是由于射流与介质的多个不一致的相互作用而同时概括的最终状态测量所引起的。
I develop an Effective Field Theory (EFT) framework to compute jet substructure observables for heavy ion collision experiments. As an illustration, I consider dijet events that accompany the formation of a weakly coupled Quark Gluon Plasma(QGP) medium in a heavy ion collision and look at an observable insensitive to jet selection bias: the simultaneous measurement of jet mass along with the transverse momentum imbalance between the jets that are groomed to remove soft radiation. Treating the jet as an open quantum system, I write down a factorization formula within the SCET(Soft Collinear Effective Theory) framework in the forward scattering regime. The physics of the medium is encoded in a universal soft field correlator while the jet-medium interaction is captured by a medium induced jet function. The factorization formula leads to a Lindblad type equation for the evolution of the reduced density matrix of the jet in the Markovian approximation. The solution for this equation allows a resummation of large logarithms that arise due to the final state measurements imposed while simultaneously summing over multiple incoherent interactions of the jet with the medium.
