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Invariant-mass distribution of top-quark pairs and top-quark mass determination

Invariant-mass distribution of top-quark pairs and top-quark mass determination

作     者:Wan-Li Ju Guoxing Wang Xing Wang Xiaofeng Xu Yongqi Xu Li Lin Yang 鞠万里;王国兴;王星;徐小峰;徐永琪;杨李林

作者机构:School of Physics and State Key Laboratory of Nuclear Physics and TechnologyPeking UniversityBeijing 100871China Institute for Particle Physics PhenomenologyDurham UniversityDurham DH13LEUK PRISMA+Cluster of Excellence&Mainz Institute for Theoretical PhysicsJohannes Gutenberg University55099 MainzGermany Institut für Theoretische PhysikUniversität BernSidlerstrasse 5CH-3012 BernSwitzerland Zhejiang Institute of Modern PhysicsDepartment of PhysicsZhejiang UniversityHangzhou 310027China 

出 版 物:《Chinese Physics C》 (中国物理C(英文版))

年 卷 期:2020年第44卷第9期

页      面:1-6页

核心收录:

学科分类:0709[理学-地质学] 07[理学] 0708[理学-地球物理学] 0804[工学-仪器科学与技术] 0827[工学-核科学与技术] 0703[理学-化学] 0704[理学-天文学] 070202[理学-粒子物理与原子核物理] 0702[理学-物理学] 

基  金:Supported in part by the National Natural Science Foundation of China(11975030,11635001,11575004) W.-L.Ju was Supported in part by the China Postdoctoral Science Foundation(2017M610685) 

主  题:top quark QCD resummation 

摘      要:In this study,we investigate the invariant-mass distribution of top-quark pairs near the 2mt threshold,which strongly influences the determination of the top-quark mass ***-order non-relativistic corrections lead to large contributions,which are not included in the state-of-the-art theoretical predictions.A factorization formula is derived to resum such corrections to all orders in the strong-coupling,and necessary ingredients are calculated to perform the resummation at next-to-leading *** combine the resummation with fixed-order results and present phenomenologically relevant numerical *** resummation effect significantly increases the differential cross-section in the threshold region and makes the theoretical prediction more compatible with experimental *** estimate that using our prediction in the determination of mt will lead to a value closer to the direct measurement result.

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