Probing the top-quark width using the charge identification of jets
Abstract
We propose a new method for measuring the top-quark width based on the on-/off-shell ratio of b -charge asymmetry in pp → Wbj production at the LHC. The charge asymmetry removes virtually all backgrounds and related uncertainties, while remaining systematic and theoretical uncertainties can be taken under control by the ratio of cross sections. Limited only by statistical error, in an optimistic scenario, we find that our approach leads to good precision at high integrated luminosity, at a few hundred MeV assuming 300 – 3000 fb-1 at the LHC. The approach directly probes the total width, in such a way that model-dependence can be minimized. It is complementary to existing cross section measurements which always leave a degeneracy between the total rate and the branching ratio, and provides valuable information about the properties of the top quark. Here, the proposal opens up new opportunities for precision top measurements using a b-charge identification algorithm.
- Authors:
-
- Brookhaven National Lab. (BNL), Upton, NY (United States)
- Brookhaven National Lab. (BNL), Upton, NY (United States); Chinese Academy of Sciences (CAS), Beijing (China)
- Publication Date:
- Research Org.:
- Brookhaven National Laboratory (BNL), Upton, NY (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC), High Energy Physics (HEP)
- OSTI Identifier:
- 1376124
- Alternate Identifier(s):
- OSTI ID: 1371804
- Report Number(s):
- BNL-114028-2017-JA
Journal ID: ISSN 2470-0010; PRVDAQ; KA2401012
- Grant/Contract Number:
- SC00112704; SC0012704
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Physical Review. D.
- Additional Journal Information:
- Journal Volume: 96; 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; Higgs; quark; charge; jets; phenomenology; BSM; symmetry; MeV
Citation Formats
Giardino, Pier Paolo, and Zhang, Cen. Probing the top-quark width using the charge identification of b jets. United States: N. p., 2017.
Web. doi:10.1103/PhysRevD.96.011901.
Giardino, Pier Paolo, & Zhang, Cen. Probing the top-quark width using the charge identification of b jets. United States. https://doi.org/10.1103/PhysRevD.96.011901
Giardino, Pier Paolo, and Zhang, Cen. Tue .
"Probing the top-quark width using the charge identification of b jets". United States. https://doi.org/10.1103/PhysRevD.96.011901. https://www.osti.gov/servlets/purl/1376124.
@article{osti_1376124,
title = {Probing the top-quark width using the charge identification of b jets},
author = {Giardino, Pier Paolo and Zhang, Cen},
abstractNote = {We propose a new method for measuring the top-quark width based on the on-/off-shell ratio of b -charge asymmetry in pp → Wbj production at the LHC. The charge asymmetry removes virtually all backgrounds and related uncertainties, while remaining systematic and theoretical uncertainties can be taken under control by the ratio of cross sections. Limited only by statistical error, in an optimistic scenario, we find that our approach leads to good precision at high integrated luminosity, at a few hundred MeV assuming 300 – 3000 fb-1 at the LHC. The approach directly probes the total width, in such a way that model-dependence can be minimized. It is complementary to existing cross section measurements which always leave a degeneracy between the total rate and the branching ratio, and provides valuable information about the properties of the top quark. Here, the proposal opens up new opportunities for precision top measurements using a b-charge identification algorithm.},
doi = {10.1103/PhysRevD.96.011901},
journal = {Physical Review. D.},
number = 1,
volume = 96,
place = {United States},
year = {Tue Jul 18 00:00:00 EDT 2017},
month = {Tue Jul 18 00:00:00 EDT 2017}
}
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Works referencing / citing this record:
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