A search for the standard model Higgs boson produced in association with a top-quark pair, t¯tH, is presented. The analysis uses 36.1 fb−1 of pp collision data at ffiffiffis p ¼ 13 TeV collected with the ATLAS detector at the Large Hadron Collider in 2015 and 2016. The search targets the H → b¯b decay mode. The selected events contain either one or two electrons or muons from the top-quark decays, and are then categorized according to the number of jets and how likely these are to contain b-hadrons. Multivariate techniques are used to discriminate between signal and background events, the latter being dominated by t¯t þ jets production. For a Higgs boson mass of 125 GeV, the ratio of the measured t¯tH signal cross-section to the standard model expectation is found to be μ ¼ 0.84 þ0.64 −0.61 . Avalue of μ greater than 2.0 is excluded at 95% confidence level (C.L.) while the expected upper limit is μ < 1.2 in the absence of a t¯tH signal.

Aaboud M., A.G. (2018). Search for the standard model Higgs boson produced in association with top quarks and decaying into a bb¯ pair in pp collisions at s=13  TeV with the ATLAS detector. PHYSICAL REVIEW D, 97(7), 072016-1-072016-44 [10.1103/PhysRevD.97.072016].

Search for the standard model Higgs boson produced in association with top quarks and decaying into a bb¯ pair in pp collisions at s=13  TeV with the ATLAS detector

Alberghi G. L.;Bellagamba L.;Bindi M.;Boscherini D.;Cabras G.;Caforio D.;De Castro S.;Di Sipio R.;Fabbri L.;Franchini M.;Gabrielli A.;Giacobbe B.;Lasagni Manghi F.;Macchiolo A.;Massa L.;Mengarelli A.;Monzani S.;Polini A.;Rinaldi L.;Romano M.;Sbarra C.;Sbrizzi A.;Semprini-Cesari N.;Sioli M.;Tanaka M.;Todome K.;Ucchielli G.;Valentinetti S.;Villa M.;Vittori C.;Vivarelli I.;Zoccoli A.;
2018

Abstract

A search for the standard model Higgs boson produced in association with a top-quark pair, t¯tH, is presented. The analysis uses 36.1 fb−1 of pp collision data at ffiffiffis p ¼ 13 TeV collected with the ATLAS detector at the Large Hadron Collider in 2015 and 2016. The search targets the H → b¯b decay mode. The selected events contain either one or two electrons or muons from the top-quark decays, and are then categorized according to the number of jets and how likely these are to contain b-hadrons. Multivariate techniques are used to discriminate between signal and background events, the latter being dominated by t¯t þ jets production. For a Higgs boson mass of 125 GeV, the ratio of the measured t¯tH signal cross-section to the standard model expectation is found to be μ ¼ 0.84 þ0.64 −0.61 . Avalue of μ greater than 2.0 is excluded at 95% confidence level (C.L.) while the expected upper limit is μ < 1.2 in the absence of a t¯tH signal.
2018
Aaboud M., A.G. (2018). Search for the standard model Higgs boson produced in association with top quarks and decaying into a bb¯ pair in pp collisions at s=13  TeV with the ATLAS detector. PHYSICAL REVIEW D, 97(7), 072016-1-072016-44 [10.1103/PhysRevD.97.072016].
Aaboud M., Aad G., Abbott B., Abdinov O., Abeloos B., Abidi S.H., Abouzeid O.S., Abraham N.L., Abramowicz H., Abreu H., Abulaiti Y., Acharya B.S., Ada...espandi
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11585/650156
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