First Observation of Top Quark Production in the Forward Region
File(s)PhysRevLett.115.112001.pdf (244.89 KB) 1506.00903v2.pdf (465.12 KB)
Published version
Published version
Author(s)
Type
Journal Article
Abstract
Top quark production in the forward region in proton-proton collisions is observed for the first time. The
W þ b final state with W → μν is reconstructed using muons with a transverse momentum, pT, larger than
25 GeV in the pseudorapidity range 2.0 < η < 4.5. The b jets are required to have 50 < pT < 100 GeV
and 2.2 < η < 4.2, while the transverse component of the sum of the muon and b-jet momenta must satisfy
pT > 20 GeV. The results are based on data corresponding to integrated luminosities of 1.0 and 2.0 fb−1
collected at center-of-mass energies of 7 and 8 TeV by LHCb. The inclusive top quark production
cross sections in the fiducial region are σðtopÞ½7 TeV ¼ 239 53ðstatÞ 33ðsystÞ 24ðtheoryÞ fb;
σðtopÞ½8 TeV ¼ 289 43ðstatÞ 40ðsystÞ 29ðtheoryÞ fb:These results, along with the observed differential
yields and charge asymmetries, are in agreement with next-to-leading order standard model
predictions.
W þ b final state with W → μν is reconstructed using muons with a transverse momentum, pT, larger than
25 GeV in the pseudorapidity range 2.0 < η < 4.5. The b jets are required to have 50 < pT < 100 GeV
and 2.2 < η < 4.2, while the transverse component of the sum of the muon and b-jet momenta must satisfy
pT > 20 GeV. The results are based on data corresponding to integrated luminosities of 1.0 and 2.0 fb−1
collected at center-of-mass energies of 7 and 8 TeV by LHCb. The inclusive top quark production
cross sections in the fiducial region are σðtopÞ½7 TeV ¼ 239 53ðstatÞ 33ðsystÞ 24ðtheoryÞ fb;
σðtopÞ½8 TeV ¼ 289 43ðstatÞ 40ðsystÞ 29ðtheoryÞ fb:These results, along with the observed differential
yields and charge asymmetries, are in agreement with next-to-leading order standard model
predictions.
Date Issued
2015-09-08
Date Acceptance
2015-07-08
Citation
Physical Review Letters, 2015, 115 (11), pp.112001-1-112001-10
ISSN
1079-7114
Publisher
American Physical Society
Start Page
112001-1
End Page
112001-10
Journal / Book Title
Physical Review Letters
Volume
115
Issue
11
Copyright Statement
© 2015 CERN, for the LHCb Collaboration. Published by the American Physical Society under the terms of
the Creative Commons Attribution 3.0 License. Further distribution
of this work must maintain attribution to the author(s) and
the published article’s title, journal citation, and DOI.
the Creative Commons Attribution 3.0 License. Further distribution
of this work must maintain attribution to the author(s) and
the published article’s title, journal citation, and DOI.
License URL
Subjects
Science & Technology
Physical Sciences
Physics, Multidisciplinary
Physics
DECAY
Publication Status
Published
Article Number
112001