论文标题
精确玻色子喷射相关性的无后坐方位角
Recoil-free azimuthal angle for precision boson-jet correlation
论文作者
论文摘要
向量玻色子和射流之间的方位角去相关是高能量质子 - 蛋白质和重离子碰撞的必不可少的硬探针。我们通过使用无后轴轴来克服先前研究的固有局限性，并通过微小的非扰动校正来实现前所未有的近代到领先的对数精度。这种轴的选择还使观察到的在大型背景的情况下具有可观察的鲁棒性。此外，仅使用带电的粒子轨道确定时，方位角分布将最小化，这为精确测量提供了优质的角度分辨率。我们的有效场理论包括全射流动力学，我们发现在初始和最终状态下线性偏振的Gluon横向动量分布的贡献。
The azimuthal decorrelation between a vector boson and a jet is an essential hard probe in high energy proton-proton and heavy-ion collisions. We overcome intrinsic limitations of previous studies by using a recoil-free axis, achieving unprecedented next-to-next-to-leading logarithmic accuracy with small nonperturbative corrections. This choice of axis also makes the observable robust in the presence of a large background. Furthermore, the azimuthal angle distribution is minimally changed when determined using only charged particle tracks, which offer superior angular resolution for precise measurements. Our effective field theory includes full jet dynamics, and we find contributions from linearly-polarized gluon transverse momentum distributions in the initial and final state.
