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Search for the standard model Higgs boson produced in association with a top-quark pair in pp collisions at the LHC
Baringer, Philip S. Bean, Alice Benelli, Gabriele Kenny, R. P., III Murray, Michael J. Noonan, Danny Sanders, Stephen J. Stringer, Robert W. Wood, Jeffrey Scott Chatrchyan, S.
Baringer, Philip S.
Bean, Alice
Benelli, Gabriele
Kenny, R. P., III
Murray, Michael J.
Noonan, Danny
Sanders, Stephen J.
Stringer, Robert W.
Wood, Jeffrey Scott
Chatrchyan, S.
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Abstract
A search for the standard model Higgs boson produced in association with a top-quark pair is presented using data samples corresponding to an integrated luminosity of 5.0 fb(−1) (5.1 fb(−1)) collected in pp collisions at the center-of-mass energy of 7 TeV (8 TeV). Events are considered where the top-quark pair decays to either one lepton+jets (tt-bar→ℓνqq-bar ′bb-bar) or dileptons (tt-bar→ℓ(+)νℓ(−)ν-bar bb-bar) , ℓ being an electron or a muon. The search is optimized for the decay mode H→bb-bar . The largest background to the tt-barH signal is top-quark pair production with additional jets. Artificial neural networks are used to discriminate between signal and background events. Combining the results from the 7 TeV and 8 TeV samples, the observed (expected) limit on the cross section for Higgs boson production in association with top-quark pairs for a Higgs boson mass of 125 GeV is 5.8 (5.2) times the standard model expectation.
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This is the publisher's version, also available electronically from http://link.springer.com/article/10.1007%2FJHEP05%282013%29145.
Date
2013-05-28
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Springer-Verlag
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Baringer_5-28-2013.pdf
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S. Chatrchyan et al. (The CMS Collaboration). (2013). "Search for the standard model Higgs boson produced in association with a top-quark pair in pp collisions at the LHC." Journal of High Energy Physics, 05(2013):145. http://www.dx.doi.org/10.1007/JHEP05(2013)145.