Knowledge Management System of Institute of Theoretical Physics, CAS
| Wang, SQ; Wu, XG; Si, ZG; Brodsky, SJ; Wang, SQ (reprint author), Chongqing Univ, Dept Phys, Chongqing 401331, Peoples R China. | |
| Application of the principle of maximum conformality to the top-quark charge asymmetry at the LHC | |
| Source Publication | PHYSICAL REVIEW D
 |
| Language | 英语 |
| Keyword | Order Qcd Corrections Pair Production Hadron Colliders Cross-section Leading Order Quantum Chromodynamics Spin Correlations Heavy Quarks Root-s=7 Tev Collisions |
| Abstract | The principle of maximum conformality (PMC) provides a systematic and process-independent method to derive renormalization scheme- and scale-independent fixed-order pQCD predictions. By Brodsky and Wu [Phys. Rev. D 85, 114040 (2012)1, we studied the top-quark charge asymmetry at the Tevatron. By applying the PMC, we have shown that the large discrepancies for the top-quark charge asymmetry between the Standard Model estimate and the CDF and DO data are greatly reduced. In the present paper, with the help of the Bernreuther-Si program, we present a detailed PMC analysis on the top-quark pair production up to next-to-next-to-leading-order level at the LHC. After applying PMC scale setting, the pQCD prediction for the top-quark charge asymmetry at the LHC has very small scale uncertainty; e.g. A(C broken vertical bar 7) (TeV;PMC) = (1.15(-0.03)(+0.01))%, A(C broken vertical bar 8) (TeV;PMC) = (1.03(+0.00)(+0.01))% and A(C broken vertical bar 14) (TeV;PMC) = (0.62(-0.02)(+0.00))%. The corresponding predictions using conventional scale setting are: A(C broken vertical bar 7) (TeV;PMC) = (1.23(-0.14)(+0.14))% A(C broken vertical bar 8) (TeV;Conv) = (1.11(-0.13)(+0.17))% and A(C broken vertical bar 14) (TeV;Conv) = (0.67(-0.05)(+0.05))%. In these predictions, the scale errors, are predicted by varying the initial renormalization and factorization scales in the ranges mu(init)(r) is an element of [m(t) /2,2m(t)] and mu(f) [m(t) / 2,2m(t)]. The PMC predictions are also in better agreement with the available ATLAS and CMS data. In addition, we have calculated the top-quark charge asymmetry assuming several typical cuts on the top-pair invariant mass M-t (t) over bar. For example, assuming M-t (t) over bar > 0.5 TeV and mu(f) = mu(init)(r) = m(t), we obtain A(C broken vertical bar 7) (TeV;PMC) = 2.67%, A(C broken vertical bar 8) (TeV;PMC) = 2.39%, and A(C broken vertical bar 14) (TeV;PMC) = 1.28%. |
| 2014 | |
| ISSN | 1550-7998 |
| Volume | 90Issue:11Pages:114034 |
| Subject Area | Physics |
| DOI | 10.1103/PhysRevD.90.114034 |
| Indexed By | SCI |
| Funding Organization | Fundamental Research Funds for the Central Universities [CQDXWL-2012-Z002]; Natural Science Foundation of China [11275280, 11325525]; Department of Energy [DE-AC02-76SF00515]; Open Project Program of the State Key Laboratory of Theoretical Physics, Institute of Theoretical Physics, Chinese Academy of Sciences [Y3KF31101, SLAC-PUB-16116] ; Fundamental Research Funds for the Central Universities [CQDXWL-2012-Z002]; Natural Science Foundation of China [11275280, 11325525]; Department of Energy [DE-AC02-76SF00515]; Open Project Program of the State Key Laboratory of Theoretical Physics, Institute of Theoretical Physics, Chinese Academy of Sciences [Y3KF31101, SLAC-PUB-16116] ; Fundamental Research Funds for the Central Universities [CQDXWL-2012-Z002]; Natural Science Foundation of China [11275280, 11325525]; Department of Energy [DE-AC02-76SF00515]; Open Project Program of the State Key Laboratory of Theoretical Physics, Institute of Theoretical Physics, Chinese Academy of Sciences [Y3KF31101, SLAC-PUB-16116] ; Fundamental Research Funds for the Central Universities [CQDXWL-2012-Z002]; Natural Science Foundation of China [11275280, 11325525]; Department of Energy [DE-AC02-76SF00515]; Open Project Program of the State Key Laboratory of Theoretical Physics, Institute of Theoretical Physics, Chinese Academy of Sciences [Y3KF31101, SLAC-PUB-16116] |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://ir.itp.ac.cn/handle/311006/15528 |
| Collection | SCI期刊论文 |
| Corresponding Author | Wang, SQ (reprint author), Chongqing Univ, Dept Phys, Chongqing 401331, Peoples R China. |
| Recommended Citation GB/T 7714 | Wang, SQ,Wu, XG,Si, ZG,et al. Application of the principle of maximum conformality to the top-quark charge asymmetry at the LHC[J]. PHYSICAL REVIEW D,2014,90(11):114034. |
| APA | Wang, SQ,Wu, XG,Si, ZG,Brodsky, SJ,&Wang, SQ .(2014).Application of the principle of maximum conformality to the top-quark charge asymmetry at the LHC.PHYSICAL REVIEW D,90(11),114034. |
| MLA | Wang, SQ,et al."Application of the principle of maximum conformality to the top-quark charge asymmetry at the LHC".PHYSICAL REVIEW D 90.11(2014):114034. |
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