Predictions for the top-quark forward-backward asymmetry at high invariant pair mass using the principle of maximum conformality
Abstract
In this study, the D0 collaboration at FermiLab has recently measured the top-quark pair forward-backward asymmetry in $$\bar{p}p$$ → $$t\bar{t}$$X reactions as a function of the $$t\bar{t}$$ invariant mass M$$t\bar{t}$$. The D0 result for AFB(M$$t\bar{t}$$ > 650 GeV) is smaller than AFB(M$$t\bar{t}$$) obtained for small values of M$$t\bar{t}$$, which may indicate an “increasing-decreasing” behavior for AFB(M$$t\bar{t}$$ > Mcut). This behavior is not explained using conventional renormalization scale setting, or even by a next-to-next-to-leading order (N2LO) QCD calculation—one predicts a monotonically increasing behavior. In the conventional scale-setting method, one simply guesses a single renormalization scale μr for the argument of the QCD running coupling and then varies it over an arbitrary range. However, the conventional method has inherent difficulties.
- Authors:
-
- Chongqing Univ., Chongqing (People's Republic of China); Guizhou Minzu Univ., Guiyang (People's Republic of China)
- Chongqing Univ., Chongqing (People's Republic of China)
- Shandong Univ., Shandong (People's Republic of China)
- SLAC National Accelerator Lab., Menlo Park, CA (United States)
- Publication Date:
- Research Org.:
- SLAC National Accelerator Lab., Menlo Park, CA (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC), High Energy Physics (HEP)
- OSTI Identifier:
- 1213170
- Alternate Identifier(s):
- OSTI ID: 1234276
- Report Number(s):
- SLAC-PUB-16368
Journal ID: ISSN 2470-0010; PRVDAQ; arXiv:1508.03739
- Grant/Contract Number:
- AC02-76SF00515; 11275280; 11325525; CDJZR305513
- Resource Type:
- Journal Article: Accepted Manuscript
- Journal Name:
- Physical Review D
- Additional Journal Information:
- Journal Volume: 93; Journal Issue: 1; Journal ID: ISSN 2470-0010
- Publisher:
- American Physical Society (APS)
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; Experiment-HEP; Phenomenology-HEP; HEPPH
Citation Formats
Wang, Sheng -Quan, Wu, Xing -Gang, Si, Zong -Guo, and Brodsky, Stanley J. Predictions for the top-quark forward-backward asymmetry at high invariant pair mass using the principle of maximum conformality. United States: N. p., 2016.
Web. doi:10.1103/PhysRevD.93.014004.
Wang, Sheng -Quan, Wu, Xing -Gang, Si, Zong -Guo, & Brodsky, Stanley J. Predictions for the top-quark forward-backward asymmetry at high invariant pair mass using the principle of maximum conformality. United States. https://doi.org/10.1103/PhysRevD.93.014004
Wang, Sheng -Quan, Wu, Xing -Gang, Si, Zong -Guo, and Brodsky, Stanley J. 2016.
"Predictions for the top-quark forward-backward asymmetry at high invariant pair mass using the principle of maximum conformality". United States. https://doi.org/10.1103/PhysRevD.93.014004. https://www.osti.gov/servlets/purl/1213170.
@article{osti_1213170,
title = {Predictions for the top-quark forward-backward asymmetry at high invariant pair mass using the principle of maximum conformality},
author = {Wang, Sheng -Quan and Wu, Xing -Gang and Si, Zong -Guo and Brodsky, Stanley J.},
abstractNote = {In this study, the D0 collaboration at FermiLab has recently measured the top-quark pair forward-backward asymmetry in $\bar{p}p$ → $t\bar{t}$X reactions as a function of the $t\bar{t}$ invariant mass M$t\bar{t}$. The D0 result for AFB(M$t\bar{t}$ > 650 GeV) is smaller than AFB(M$t\bar{t}$) obtained for small values of M$t\bar{t}$, which may indicate an “increasing-decreasing” behavior for AFB(M$t\bar{t}$ > Mcut). This behavior is not explained using conventional renormalization scale setting, or even by a next-to-next-to-leading order (N2LO) QCD calculation—one predicts a monotonically increasing behavior. In the conventional scale-setting method, one simply guesses a single renormalization scale μr for the argument of the QCD running coupling and then varies it over an arbitrary range. However, the conventional method has inherent difficulties.},
doi = {10.1103/PhysRevD.93.014004},
url = {https://www.osti.gov/biblio/1213170},
journal = {Physical Review D},
issn = {2470-0010},
number = 1,
volume = 93,
place = {United States},
year = {Thu Jan 07 00:00:00 EST 2016},
month = {Thu Jan 07 00:00:00 EST 2016}
}
Web of Science
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