Becher Thomas, Schalch Nicolas, Xu Xiaofeng
Institut für Theoretische Physik & AEC, Universität Bern, Sidlerstrasse 5, CH-3012 Bern, Switzerland.
PRISMA+ Cluster of Excellence, Johannes Gutenberg University, 55099 Mainz, Germany.
Phys Rev Lett. 2024 Feb 23;132(8):081602. doi: 10.1103/PhysRevLett.132.081602.
In cross sections with angular cuts, an intricate pattern of enhanced higher-order corrections known as nonglobal logarithms arises. The leading logarithmic terms were computed numerically two decades ago, but the resummation of subleading nonglobal logarithms remained a challenge that we solve in this Letter using renormalization group methods in effective field theory. To achieve next-to-leading logarithmic accuracy, we implement the two-loop anomalous dimension governing the resummation of nonglobal logarithms into a large-N_{c} parton shower framework, together with one-loop matching corrections. As a first application, we study the interjet energy flow in e^{+}e^{-} annihilation into two jets. We then present, for the first time, resummed predictions at next-to-leading logarithmic accuracy for a gap-between-jets observable at hadron colliders.
在具有角向切割的横截面中，会出现一种被称为非全局对数的复杂增强高阶修正模式。主导对数项在二十年前就已通过数值计算得出，但次主导非全局对数的重整化仍是一项挑战，我们在本信函中使用有效场论中的重整化群方法解决了这一问题。为达到次主导对数精度，我们将控制非全局对数重整化的两圈反常维度与一圈匹配修正一起，应用于大Nc部分子喷注框架。作为首个应用，我们研究了e+e−湮灭成两个喷注过程中的喷注间能量流。然后，我们首次给出了强子对撞机上可观测的喷注间间隙在次主导对数精度下的重整化预测。
