U.S. Department of Energy Office of Scientific and Technical Information
Search for Higgs boson decays into a pair of pseudoscalar particles in the $bbμμ$ final state with the ATLAS detector in pp collisions at $$\sqrt{s} =$$ 13 TeV
This paper presents a search for decays of the Higgs boson with a mass of 125 GeV into a pair of new pseudoscalar particles, $H→aa$, where one a-boson decays into a b-quark pair and the other into a muon pair. The search uses 139 fb-1 of proton-proton collision data at a center-of-mass energy of $$\sqrt{s} =$$ 13 TeV recorded between 2015 and 2018 by the ATLAS experiment at the LHC. A narrow dimuon resonance is searched for in the invariant mass spectrum between 16 GeV and 62 GeV. The largest excess of events above the Standard Model backgrounds is observed at a dimuon invariant mass of 52 GeV and corresponds to a local (global) significance of 3.3σ (1.7σ). Upper limits at 95% confidence level are placed on the branching ratio of the Higgs boson to the $bbμμ$ final state, $B(H→aa→bbμμ)$, and are in the range 0.2-4.0×10-4, depending on the signal mass hypothesis.
Aad, G., et al. "Search for Higgs boson decays into a pair of pseudoscalar particles in the $bbμμ$ final state with the ATLAS detector in pp collisions at $\sqrt{s} =$ 13 TeV." Physical Review. D., vol. 105, no. 1, Jan. 2022. https://doi.org/10.1103/physrevd.105.012006
Aad, G., Abbott, B., Abbott, D. C., Abed Abud, A., Abeling, K., Abhayasinghe, D. K., Abidi, S. H., Aboulhorma, A., Abramowicz, H., Abreu, H., Abulaiti, Y., Abusleme Hoffman, A. C., Acharya, B. S., Achkar, B., Adam, L., Adam Bourdarios, C., Adamczyk, L., Adamek, L., ... Zwalinski, L. (2022). Search for Higgs boson decays into a pair of pseudoscalar particles in the $bbμμ$ final state with the ATLAS detector in pp collisions at $\sqrt{s} =$ 13 TeV. Physical Review. D., 105(1). https://doi.org/10.1103/physrevd.105.012006
Aad, G., Abbott, B., Abbott, D. C., et al., "Search for Higgs boson decays into a pair of pseudoscalar particles in the $bbμμ$ final state with the ATLAS detector in pp collisions at $\sqrt{s} =$ 13 TeV," Physical Review. D. 105, no. 1 (2022), https://doi.org/10.1103/physrevd.105.012006
@article{osti_1856226,
author = {Aad, G. and Abbott, B. and Abbott, D. C. and Abed Abud, A. and Abeling, K. and Abhayasinghe, D. K. and Abidi, S. H. and Aboulhorma, A. and Abramowicz, H. and Abreu, H. and others},
title = {Search for Higgs boson decays into a pair of pseudoscalar particles in the $bbμμ$ final state with the ATLAS detector in pp collisions at $\sqrt{s} =$ 13 TeV},
annote = {This paper presents a search for decays of the Higgs boson with a mass of 125 GeV into a pair of new pseudoscalar particles, $H→aa$, where one a-boson decays into a b-quark pair and the other into a muon pair. The search uses 139 fb-1 of proton-proton collision data at a center-of-mass energy of $\sqrt{s} =$ 13 TeV recorded between 2015 and 2018 by the ATLAS experiment at the LHC. A narrow dimuon resonance is searched for in the invariant mass spectrum between 16 GeV and 62 GeV. The largest excess of events above the Standard Model backgrounds is observed at a dimuon invariant mass of 52 GeV and corresponds to a local (global) significance of 3.3σ (1.7σ). Upper limits at 95% confidence level are placed on the branching ratio of the Higgs boson to the $bbμμ$ final state, $B(H→aa→bbμμ)$, and are in the range 0.2-4.0×10-4, depending on the signal mass hypothesis.},
doi = {10.1103/physrevd.105.012006},
url = {https://www.osti.gov/biblio/1856226},
journal = {Physical Review. D.},
issn = {ISSN 2470-0010},
number = {1},
volume = {105},
place = {United States},
publisher = {American Physical Society (APS)},
year = {2022},
month = {01}}
Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States); SLAC National Accelerator Laboratory (SLAC), Menlo Park, CA (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES); USDOE Office of Science (SC), High Energy Physics (HEP) (SC-25)
Contributing Organization:
ATLAS Collaboration
Grant/Contract Number:
AC02-05CH11231; AC02-76SF00515
OSTI ID:
1856226
Alternate ID(s):
OSTI ID: 1862333
Journal Information:
Physical Review. D., Journal Name: Physical Review. D. Journal Issue: 1 Vol. 105; ISSN 2470-0010
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