Top quark forward-backward asymmetry and same-sign top quark pairs.
Abstract
The top quark forward-backward asymmetry measured at the Tevatron collider shows a large deviation from standard model expectations. Among possible interpretations, a nonuniversal Z{prime} model is of particular interest as it naturally predicts a top quark in the forward region of large rapidity. To reproduce the size of the asymmetry, the couplings of the Z{prime} to standard model quarks must be large, inevitably leading to copious production of same-sign top quark pairs at the energies of the Large Hadron Collider (LHC). We explore the discovery potential for tt and ttj production in early LHC experiments at 7-8 TeV and conclude that if no tt signal is observed with 1 fb{sup -1} of integrated luminosity, then a nonuniversal Z{prime} alone cannot explain the Tevatron forward-backward asymmetry.
- Authors:
-
- High Energy Physics
- Publication Date:
- Research Org.:
- Argonne National Lab. (ANL), Argonne, IL (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC); WRI Program; MEXT - Japan; National Natural Science Foundation of China (NNSFC)
- OSTI Identifier:
- 1018185
- Report Number(s):
- ANL-HEP-PR-11-9
Journal ID: 0031-9007; TRN: US1103309
- DOE Contract Number:
- DE-AC02-06CH11357
- Resource Type:
- Journal Article
- Journal Name:
- Phys. Rev. Lett.
- Additional Journal Information:
- Journal Volume: 106; Journal Issue: May 20, 2011
- Country of Publication:
- United States
- Language:
- ENGLISH
- Subject:
- 43 PARTICLE ACCELERATORS; ASYMMETRY; FERMILAB TEVATRON; HADRONS; LUMINOSITY; PARTICLE RAPIDITY; PRODUCTION; QUARKS; STANDARD MODEL; T QUARKS
Citation Formats
Berger, E L, Cao, Q -H, Chen, C -R, Li, C S, Zhang, H, Univ. of Chicago), Univ. of Tokyo), and Peking Univ,). Top quark forward-backward asymmetry and same-sign top quark pairs.. United States: N. p., 2011.
Web. doi:10.1103/PhysRevLett.106.201801.
Berger, E L, Cao, Q -H, Chen, C -R, Li, C S, Zhang, H, Univ. of Chicago), Univ. of Tokyo), & Peking Univ,). Top quark forward-backward asymmetry and same-sign top quark pairs.. United States. https://doi.org/10.1103/PhysRevLett.106.201801
Berger, E L, Cao, Q -H, Chen, C -R, Li, C S, Zhang, H, Univ. of Chicago), Univ. of Tokyo), and Peking Univ,). 2011.
"Top quark forward-backward asymmetry and same-sign top quark pairs.". United States. https://doi.org/10.1103/PhysRevLett.106.201801.
@article{osti_1018185,
title = {Top quark forward-backward asymmetry and same-sign top quark pairs.},
author = {Berger, E L and Cao, Q -H and Chen, C -R and Li, C S and Zhang, H and Univ. of Chicago) and Univ. of Tokyo) and Peking Univ,)},
abstractNote = {The top quark forward-backward asymmetry measured at the Tevatron collider shows a large deviation from standard model expectations. Among possible interpretations, a nonuniversal Z{prime} model is of particular interest as it naturally predicts a top quark in the forward region of large rapidity. To reproduce the size of the asymmetry, the couplings of the Z{prime} to standard model quarks must be large, inevitably leading to copious production of same-sign top quark pairs at the energies of the Large Hadron Collider (LHC). We explore the discovery potential for tt and ttj production in early LHC experiments at 7-8 TeV and conclude that if no tt signal is observed with 1 fb{sup -1} of integrated luminosity, then a nonuniversal Z{prime} alone cannot explain the Tevatron forward-backward asymmetry.},
doi = {10.1103/PhysRevLett.106.201801},
url = {https://www.osti.gov/biblio/1018185},
journal = {Phys. Rev. Lett.},
number = May 20, 2011,
volume = 106,
place = {United States},
year = {Fri May 20 00:00:00 EDT 2011},
month = {Fri May 20 00:00:00 EDT 2011}
}