论文标题
使用软滴射质量质量在强子山子上进行强耦合测量的前景
Prospects for strong coupling measurement at hadron colliders using soft-drop jet mass
论文作者
论文摘要
我们从$ pp $碰撞到NNLL准确性，通过基于现场理论的形式主义来计算软性喷气质量分布，从$ pp $碰撞到NNLL的精度。使用这些计算，我们评估了$α_s$精度测量值的理论不确定性，这是由于较高级扰动效应，非扰动校正和PDF不确定性而导致的。我们确定哪些软滴参数非常适合衡量$α_s$，并发现高含量重新召集对喷气质量分布的形状具有质量上重要的影响。我们发现夸克喷气机和Gluon喷气机对$α_s$具有相似的灵敏度，并强调实验区分夸克和gluon喷气机并不需要$α_s$ sumeuroment。我们得出的结论是，将$α_s$衡量到10％的水平现在是可行的，并且有了改进理论，可以进行5％的水平测量。降低到1％的水平，与其他最先进的测量值竞争将是具有挑战性的。
We compute the soft-drop jet-mass distribution from $pp$ collisions to NNLL accuracy while including nonperturbative corrections through a field-theory based formalism. Using these calculations, we assess the theoretical uncertainties on an $α_s$ precision measurement due to higher order perturbative effects, nonperturbative corrections, and PDF uncertainty. We identify which soft-drop parameters are well-suited for measuring $α_s$, and find that higher-logarithmic resummation has a qualitatively important effect on the shape of the jet-mass distribution. We find that quark jets and gluon jets have similar sensitivity to $α_s$, and emphasize that experimentally distinguishing quark and gluon jets is not required for an $α_s$ measurement. We conclude that measuring $α_s$ to the 10% level is feasible now, and with improvements in theory a 5% level measurement is possible. Getting down to the 1% level to be competitive with other state-of-the-art measurements will be challenging.
