Top quark mass determination from the energy peaks of b-jets and B-hadrons at NLO QCD
Abstract
Here, we analyze the energy spectra of single b-jets and B-hadrons resulting from the production and decay of top quarks within the SM at the LHC at the NLO QCD. For both hadrons and jets, we calculate the correlation of the peak of the spectrum with the top quark mass, considering the “energy peak” as an observable to determine the top quarkmass. Such a method is motivated by our previous work where we argued that this approach can have reduced sensitivity to the details of the production mechanism of the top quark, whether it concerns higher-order QCD effects or new physics contributions. For a 1% jet energy scale uncertainty, the top quark mass can then be extracted using the energy peak of b-jets with an error ±(1.2(exp) + 0.6(th)) GeV. In view of the dominant jet energy scale uncertainty in the measurement using b-jets, we also investigate the extraction of the top quark mass from the energy peak of the corresponding B-hadrons which, in principle, can be measured without this uncertainty. The calculation of the B-hadron energy spectrum is carried out using fragmentation functions at NLO. The dependence on the fragmentation scale turns out to be the largest theoretical uncertaintymore »
- Authors:
-
- Univ. of Maryland, College Park, MD (United States)
- European Organization for Nuclear Research (CERN), Geneva (Switzerland)
- European Organization for Nuclear Research (CERN), Geneva (Switzerland); Univ. of Florida, Gainesville, FL (United States)
- Publication Date:
- Research Org.:
- Univ. of Florida, Gainesville, FL (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC); National Science Foundation (NSF)
- OSTI Identifier:
- 1358570
- Grant/Contract Number:
- SC0010296; PHY-1315155
- Resource Type:
- Accepted Manuscript
- Journal Name:
- European Physical Journal. C, Particles and Fields
- Additional Journal Information:
- Journal Volume: 76; Journal Issue: 11; Journal ID: ISSN 1434-6044
- Publisher:
- Springer
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS
Citation Formats
Agashe, Kaustubh, Franceschini, Roberto, Kim, Doojin, and Schulze, Markus. Top quark mass determination from the energy peaks of b-jets and B-hadrons at NLO QCD. United States: N. p., 2016.
Web. doi:10.1140/epjc/s10052-016-4494-x.
Agashe, Kaustubh, Franceschini, Roberto, Kim, Doojin, & Schulze, Markus. Top quark mass determination from the energy peaks of b-jets and B-hadrons at NLO QCD. United States. https://doi.org/10.1140/epjc/s10052-016-4494-x
Agashe, Kaustubh, Franceschini, Roberto, Kim, Doojin, and Schulze, Markus. Mon .
"Top quark mass determination from the energy peaks of b-jets and B-hadrons at NLO QCD". United States. https://doi.org/10.1140/epjc/s10052-016-4494-x. https://www.osti.gov/servlets/purl/1358570.
@article{osti_1358570,
title = {Top quark mass determination from the energy peaks of b-jets and B-hadrons at NLO QCD},
author = {Agashe, Kaustubh and Franceschini, Roberto and Kim, Doojin and Schulze, Markus},
abstractNote = {Here, we analyze the energy spectra of single b-jets and B-hadrons resulting from the production and decay of top quarks within the SM at the LHC at the NLO QCD. For both hadrons and jets, we calculate the correlation of the peak of the spectrum with the top quark mass, considering the “energy peak” as an observable to determine the top quarkmass. Such a method is motivated by our previous work where we argued that this approach can have reduced sensitivity to the details of the production mechanism of the top quark, whether it concerns higher-order QCD effects or new physics contributions. For a 1% jet energy scale uncertainty, the top quark mass can then be extracted using the energy peak of b-jets with an error ±(1.2(exp) + 0.6(th)) GeV. In view of the dominant jet energy scale uncertainty in the measurement using b-jets, we also investigate the extraction of the top quark mass from the energy peak of the corresponding B-hadrons which, in principle, can be measured without this uncertainty. The calculation of the B-hadron energy spectrum is carried out using fragmentation functions at NLO. The dependence on the fragmentation scale turns out to be the largest theoretical uncertainty in this extraction of top quark mass.},
doi = {10.1140/epjc/s10052-016-4494-x},
journal = {European Physical Journal. C, Particles and Fields},
number = 11,
volume = 76,
place = {United States},
year = {Mon Nov 21 00:00:00 EST 2016},
month = {Mon Nov 21 00:00:00 EST 2016}
}
Web of Science
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