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Title: Top quark mass determination from the energy peaks of b-jets and B-hadrons at NLO QCD

Journal Article · · European Physical Journal. C, Particles and Fields
 [1];  [2];  [3];  [2]
  1. Univ. of Maryland, College Park, MD (United States)
  2. European Organization for Nuclear Research (CERN), Geneva (Switzerland)
  3. European Organization for Nuclear Research (CERN), Geneva (Switzerland); Univ. of Florida, Gainesville, FL (United States)
+ Show Author Affiliations

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.

Research Organization:
Univ. of Florida, Gainesville, FL (United States)
Sponsoring Organization:
USDOE Office of Science (SC); National Science Foundation (NSF)
Grant/Contract Number:
SC0010296; PHY-1315155
OSTI ID:
1358570
Journal Information:
European Physical Journal. C, Particles and Fields, Vol. 76, Issue 11; ISSN 1434-6044
Publisher:
SpringerCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 13 works
Citation information provided by
Web of Science

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Cited By (9)

Top quark mass studies with t t ¯ j $$ t\overline{t}j $$ at the LHC journal March 2018
Fully-differential top-pair production at a lepton collider: from threshold to continuum journal March 2018
Addendum to: A theoretical study of top-mass measurements at the LHC using NLO+PS generators of increasing accuracy journal October 2019
Fully-differential top-pair production at a lepton collider: from threshold to continuum text January 2018
Addendum to: A theoretical study of top-mass measurements at the LHC using NLO+PS generators of increasing accuracy text January 2019
Fully-differential Top-Pair Production at a Lepton Collider: From Threshold to Continuum text January 2017
Fully-differential Top-Pair Production at a Lepton Collider: From Threshold to Continuum text January 2017
Addendum to: A Theoretical Study of Top-Mass Measurements at the LHC Using NLO+PS Generators of Increasing Accuracy text January 2019
The Top Quark Mass at the LHC preprint January 2018

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