Reanalysis of the top-quark pair hadroproduction and a precise determination of the top-quark pole mass at the LHC

作     者：Sheng-Quan Wang Xing-Gang Wu Jian-Ming Shen Stanley J.Brodsky 王声权;吴兴刚;申建明;Stanley J.Brodsky

作者机构：Department of PhysicsGuizhou Minzu UniversityGuiyang 550025China Department of PhysicsChongqing UniversityChongqing 401331China School of Physics and ElectronicsHunan UniversityChangsha 410082China SLAC National Accelerator LaboratoryStanford UniversityStanfordCalifornia 94039USA 

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

年 卷 期：2021年第45卷第11期

页      面：25-33页

核心收录：

学科分类：07[理学] 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 Natural Science Foundation of China (11625520, 11705033, 11905056, 11947406) the Project of Guizhou Provincial Department(KY003) the Department of Energy Contract (DE-AC02-76SF00515. SLAC-PUB-17567) 

主　　题：top-quark pole mass production cross-section principle of maximum conformality 

摘      要：In this study,we calculate the tt pQCD production cross-section at the NNLO and determine the top-quark pole mass from recent measurements at the LHC at the center-of-mass energy √S=13 TeV to a high precision by applying the principle of maximum conformality(PMC).The PMC provides a systematic method that rigorously eliminates QCD renormalization scale ambiguities by summing the nonconformalβcontributions into the QCD coupling *** PMC predictions satisfy the requirements of renormalization group invariance,including renormalization scheme independence,and the PMC scales accurately reflect the virtuality of the underlying production *** using the PMC,an improved prediction for the tt production cross-section is obtained without scale ambiguities,which in turn provides a precise value for the top-quark pole ***,the prediction of PMC calculations that the magnitudes of higher-order PMC predictions are well within the error bars predicted from the known lower-order has been demonstrated for the top-quark pair *** resulting determination of the top-quark pole mass,m^(pole)_(t)=172.5±1.4 GeV,from the LHC measurement at √S=13 TeV agrees with the current world average cited by the Particle Data Group(PDG).The PMC prediction provides an important high-precision test of the consistency of pQCD and the SM at √S=13 TeV with previous LHC measurements at lower CM energies.