Measurements of WH and ZH production in the H→bb<mml:mo stretchy="false"><overbar></mml:mover> decay channel in pp collisions at 13<mml:mspace width="0.166667em"></mml:mspace>Te<mml:mspace width="0.333333em"></mml:mspace> with the ATLAS detector



Aaboud, M, Aad, G, Abbott, B, Abdinov, O, Abeloos, B, Abhayasinghe, DK, Abidi, SH, AbouZeid, OS, Abraham, NL, Abramowicz, H
et al (show 2917 more authors) (2021) Measurements of WH and ZH production in the H→bb<mml:mo stretchy="false"><overbar></mml:mover> decay channel in pp collisions at 13<mml:mspace width="0.166667em"></mml:mspace>Te<mml:mspace width="0.333333em"></mml:mspace> with the ATLAS detector. EUROPEAN PHYSICAL JOURNAL C, 81 (2). 178-.

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Abstract

<jats:title>Abstract</jats:title><jats:p>Measurements of the Standard Model Higgs boson decaying into a <jats:inline-formula><jats:alternatives><jats:tex-math>$$b\bar{b}$$</jats:tex-math><mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:mrow> <mml:mi>b</mml:mi> <mml:mover> <mml:mrow> <mml:mi>b</mml:mi> </mml:mrow> <mml:mrow> <mml:mo>¯</mml:mo> </mml:mrow> </mml:mover> </mml:mrow> </mml:math></jats:alternatives></jats:inline-formula> pair and produced in association with a <jats:italic>W</jats:italic> or <jats:italic>Z</jats:italic> boson decaying into leptons, using proton–proton collision data collected between 2015 and 2018 by the ATLAS detector, are presented. The measurements use collisions produced by the Large Hadron Collider at a centre-of-mass energy of <jats:inline-formula><jats:alternatives><jats:tex-math>$$\sqrt{s} = 13\,\text {Te}\text {V}$$</jats:tex-math><mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:mrow> <mml:msqrt> <mml:mi>s</mml:mi> </mml:msqrt> <mml:mo>=</mml:mo> <mml:mn>13</mml:mn> <mml:mspace /> <mml:mrow> <mml:mtext>Te</mml:mtext> <mml:mspace /> </mml:mrow> </mml:mrow> </mml:math></jats:alternatives></jats:inline-formula>, corresponding to an integrated luminosity of <jats:inline-formula><jats:alternatives><jats:tex-math>$$139\,\mathrm {fb}^{-1}$$</jats:tex-math><mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:mrow> <mml:mn>139</mml:mn> <mml:mspace /> <mml:msup> <mml:mrow> <mml:mi>fb</mml:mi> </mml:mrow> <mml:mrow> <mml:mo>-</mml:mo> <mml:mn>1</mml:mn> </mml:mrow> </mml:msup> </mml:mrow> </mml:math></jats:alternatives></jats:inline-formula>. The production of a Higgs boson in association with a <jats:italic>W</jats:italic> or <jats:italic>Z</jats:italic> boson is established with observed (expected) significances of 4.0 (4.1) and 5.3 (5.1) standard deviations, respectively. Cross-sections of associated production of a Higgs boson decaying into bottom quark pairs with an electroweak gauge boson, <jats:italic>W</jats:italic> or <jats:italic>Z</jats:italic>, decaying into leptons are measured as a function of the gauge boson transverse momentum in kinematic fiducial volumes. The cross-section measurements are all consistent with the Standard Model expectations, and the total uncertainties vary from 30% in the high gauge boson transverse momentum regions to 85% in the low regions. Limits are subsequently set on the parameters of an effective Lagrangian sensitive to modifications of the <jats:italic>WH</jats:italic> and <jats:italic>ZH</jats:italic> processes as well as the Higgs boson decay into <jats:inline-formula><jats:alternatives><jats:tex-math>$$b\bar{b}$$</jats:tex-math><mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:mrow> <mml:mi>b</mml:mi> <mml:mover> <mml:mrow> <mml:mi>b</mml:mi> </mml:mrow> <mml:mrow> <mml:mo>¯</mml:mo> </mml:mrow> </mml:mover> </mml:mrow> </mml:math></jats:alternatives></jats:inline-formula>.</jats:p>

Item Type: Article
Additional Information: 61 pages in total, author list starting page 45, 10 figures, 15 tables, published in EPJC. All figures including auxiliary figures are available at https://atlas.web.cern.ch/Atlas/GROUPS/PHYSICS/PAPERS/HIGG-2018-51/. The results including the correlation matrix are available at https://doi.org/10.17182/hepdata.94800
Uncontrolled Keywords: 5106 Nuclear and Plasma Physics, 5107 Particle and High Energy Physics, 51 Physical Sciences
Depositing User: Symplectic Admin
Date Deposited: 08 Mar 2021 10:28
Last Modified: 22 Jun 2024 12:45
DOI: 10.1140/epjc/s10052-020-08677-2
Open Access URL: https://link.springer.com/article/10.1140%2Fepjc%2...
Related URLs:
URI: https://livrepository.liverpool.ac.uk/id/eprint/3116752