Search for new particles in an extended Higgs sector with four b quarks in the final state at <math altimg="si1.svg"><msqrt><mrow><mi>s</mi></mrow></msqrt><mo linebreak="goodbreak" linebreakstyle="after">=</mo><mn>13</mn><mrow><mspace width="0.20em"/><mtext>TeV</mtext></mrow></math>

Benecke, Anna;Bethani, Agni;Bruno, Giacomo;Bury, Florian;CMS;et.al.
(2022) Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics — Vol. 835 (2022)

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Authors
  • Benecke, Annaorcid-logoUCLouvain
    Author
  • Bethani, Agniorcid-logoUCLouvain
    Author
  • Bruno, GiacomoUCLouvain
    Author
  • Bury, FlorianUCLouvain
    Author
  • Caputo, ClaudioUCLouvain
    Author
  • David, PieterUCLouvain
    Author
  • Delaere, Christopheorcid-logoUCLouvain
    Author
  • Donertas, Izzeddin SuatUCLouvain
    Author
  • Giammanco, AndreaUCLouvain
    Author
  • Jaffel, KhawlaUCLouvain
    Author
  • Jain, SandhyaUCLouvain
    Author
  • Lemaitre, VincentUCLouvain
    Author
  • Mondal, KuntalUCLouvain
    Author
  • Prisciandaro, JessicaUCLouvain
    Author
  • Taliercio, AngelaUCLouvain
    Author
  • Teklishyn, MaksymUCLouvain
    Author
  • Tran, Tu ThongUCLouvain
    Author
  • Vischia, PietroUCLouvain
    Author
  • Wertz, SébastienUCLouvain
    Author
  • CMS
    Author
  • et. al.
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Abstract
A search for a massive resonance X decaying to a pair of spin-0 bosons ϕ that themselves decay to pairs of bottom quarks, is presented. The analysis is restricted to the mass ranges <math altimg="si2.svg"><msub><mrow><mi>m</mi></mrow><mrow><mi mathvariant="normal">ϕ</mi></mrow></msub></math> from 25 to 100 GeV and <math altimg="si3.svg"><msub><mrow><mi>m</mi></mrow><mrow><mi mathvariant="normal">X</mi></mrow></msub></math> from 1 to 3 TeV. For these mass ranges, the decay products of each ϕ boson are expected to merge into a single large-radius jet. Jet substructure and flavor identification techniques are used to identify these jets. The search is based on CERN LHC proton-proton collision data at <math altimg="si4.svg"><msqrt><mrow><mi>s</mi></mrow></msqrt><mo linebreak="goodbreak" linebreakstyle="after">=</mo><mn>13</mn><mspace width="0.2em"/><mtext>TeV</mtext></math>, collected with the CMS detector in 2016–2018, corresponding to an integrated luminosity of 138<math altimg="si5.svg"><mspace width="0.2em"/><msup><mrow><mtext>fb</mtext></mrow><mrow><mo linebreak="badbreak" linebreakstyle="after">−</mo><mn>1</mn></mrow></msup></math>. Model-specific limits, where the two new particles arise from an extended Higgs sector, are set on the product of the production cross section and branching fraction for <math altimg="si6.svg"><mi mathvariant="normal">X</mi><mo stretchy="false">→</mo><mi mathvariant="normal">ϕ</mi><mi mathvariant="normal">ϕ</mi><mo stretchy="false">→</mo><mo stretchy="false">(</mo><mi mathvariant="normal">b</mi><mover accent="true"><mrow><mi mathvariant="normal">b</mi></mrow><mo>‾</mo></mover><mo stretchy="false">)</mo><mo stretchy="false">(</mo><mi mathvariant="normal">b</mi><mover accent="true"><mrow><mi mathvariant="normal">b</mi></mrow><mo>‾</mo></mover><mo stretchy="false">)</mo></math> as a function of the resonances' masses, where both the <math altimg="si7.svg"><mi mathvariant="normal">X</mi><mo stretchy="false">→</mo><mi mathvariant="normal">ϕ</mi><mi mathvariant="normal">ϕ</mi></math> and <math altimg="si8.svg"><mi mathvariant="normal">ϕ</mi><mo stretchy="false">→</mo><mi mathvariant="normal">b</mi><mover accent="true"><mrow><mi mathvariant="normal">b</mi></mrow><mo>‾</mo></mover></math> branching fractions are assumed to be 100%. These limits are the first of their kind on this process, ranging between 30 and 1fb at 95% confidence level for the considered mass ranges.
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Benecke, A., Bethani, A., Bruno, G., Bury, F., Caputo, C., David, P., Delaere, C., Donertas, I. S., Giammanco, A., Jaffel, K., Jain, S., Lemaitre, V., Mondal, K., Prisciandaro, J., Taliercio, A., Teklishyn, M., Tran, T. T., Vischia, P., Wertz, S., et al. (2022). Search for new particles in an extended Higgs sector with four b quarks in the final state at <math altimg=“si1.svg”><msqrt><mrow><mi>s</mi></mrow></msqrt><mo linebreak=“goodbreak” linebreakstyle=“after”>=</mo><mn>13</mn><mrow><mspace width=“0.20em”/><mtext>TeV</mtext></mrow></math>. Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, 835. https://doi.org/10.1016/j.physletb.2022.137566 (Original work published 2022)