Constraints on the Higgs boson anomalous FCNC interactions with light quarks

M. Ilyushin (NRC “Kurchatov Institute”, IHEP, Protvino, Russia) ; P. Mandrik (NRC “Kurchatov Institute”, IHEP, Protvino, Russia; Moscow Institute of Physics and Technology, Dolgoprudny, Russia) ; S. Slabospitskii (NRC “Kurchatov Institute”, IHEP, Protvino, Russia; Moscow Institute of Physics and Technology, Dolgoprudny, Russia)

We consider the Higgs boson anomalous FCNC interactions with u, c, d, s and b quarks using the effective field theory framework. Constraints on anomalous couplings are derived from experimental results on Higgs boson production with subsequent decay into bb¯ pair at LHC with s=13 TeV. Upper limits on the branching fractions of Hbs¯ and Hbd¯ are set by performing a realistic detector simulation and accurately reproducing analysis selections of the CMS Higgs boson measurement in the four-lepton final state at s=13 TeV. The searches are projected into operation conditions of HL-LHC. Sensitivity at FCC-hh to anomalous FCNC interactions is studied based on Higgs boson production with Hγγ decay channel. It is shown that at FCC-hh machine one can expect to set the upper limits of the order of 102 at 95% CL for B(Hbs¯) and B(Hbd¯).

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      "value": "We consider the Higgs boson anomalous FCNC interactions with u, c, d, s and b quarks using the effective field theory framework. Constraints on anomalous couplings are derived from experimental results on Higgs boson production with subsequent decay into <math><mi>b</mi><mover><mrow><mi>b</mi></mrow><mrow><mo>\u00af</mo></mrow></mover></math> pair at LHC with <math><msqrt><mrow><mi>s</mi></mrow></msqrt><mo>=</mo><mn>13</mn></math> TeV. Upper limits on the branching fractions of <math><mi>H</mi><mo>\u2192</mo><mi>b</mi><mover><mrow><mi>s</mi></mrow><mrow><mo>\u00af</mo></mrow></mover></math> and <math><mi>H</mi><mo>\u2192</mo><mi>b</mi><mover><mrow><mi>d</mi></mrow><mrow><mo>\u00af</mo></mrow></mover></math> are set by performing a realistic detector simulation and accurately reproducing analysis selections of the CMS Higgs boson measurement in the four-lepton final state at <math><msqrt><mrow><mi>s</mi></mrow></msqrt><mo>=</mo><mn>13</mn></math> TeV. The searches are projected into operation conditions of HL-LHC. Sensitivity at FCC-hh to anomalous FCNC interactions is studied based on Higgs boson production with <math><mi>H</mi><mo>\u2192</mo><mi>\u03b3</mi><mi>\u03b3</mi></math> decay channel. It is shown that at FCC-hh machine one can expect to set the upper limits of the order of <math><msup><mrow><mn>10</mn></mrow><mrow><mo>\u2212</mo><mn>2</mn></mrow></msup></math> at 95% CL for <math><mi>B</mi><mo>(</mo><mi>H</mi><mo>\u2192</mo><mi>b</mi><mover><mrow><mi>s</mi></mrow><mrow><mo>\u00af</mo></mrow></mover><mo>)</mo></math> and <math><mi>B</mi><mo>(</mo><mi>H</mi><mo>\u2192</mo><mi>b</mi><mover><mrow><mi>d</mi></mrow><mrow><mo>\u00af</mo></mrow></mover><mo>)</mo></math>."
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Published on:
09 January 2020
Publisher:
Elsevier
Published in:
Nuclear Physics B , Volume 952 C (2020)

Article ID: 114921
DOI:
https://doi.org/10.1016/j.nuclphysb.2020.114921
Copyrights:
The Authors
Licence:
CC-BY-3.0

Fulltext files: