Search for Higgs boson decays into a pair of pseudoscalar particles in the bbμμ final state with the ATLAS detector in pp collisions at s =13 TeV

G. Aad; T.P.A. Åkesson; E.E. Corrigan; C. Doglioni; J. Geisen; E. Hansen; V. Hedberg; G. Jarlskog; B. Konya; E. Lytken; K.H. Mankinen; C. Marcon; J.U. Mjörnmark; G.A. Mullier; R. Poettgen; N.D. Simpson; E. Skorda; O. Smirnova; L. Zwalinski; ATLAS Collaboration

doi:10.1103/PhysRevD.105.012006

Search for Higgs boson decays into a pair of pseudoscalar particles in the bbμμ final state with the ATLAS detector in pp collisions at s =13 TeV

G. Aad, T.P.A. Åkesson, E.E. Corrigan, C. Doglioni, J. Geisen, E. Hansen, V. Hedberg, G. Jarlskog, B. Konya, E. Lytken, K.H. Mankinen, C. Marcon, J.U. Mjörnmark, G.A. Mullier, R. Poettgen, N.D. Simpson, E. Skorda, O. Smirnova, L. Zwalinski, ATLAS Collaboration

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Abstract

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 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. © 2022 CERN.

Original language	English
Article number	012006
Journal	Physical Review D
Volume	105
Issue number	1
DOIs	https://doi.org/10.1103/PhysRevD.105.012006
Publication status	Published - 2022

Subject classification (UKÄ)

Subatomic Physics

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Aad, G., Åkesson, T. P. A., Corrigan, E. E., Doglioni, C., Geisen, J., Hansen, E., Hedberg, V., Jarlskog, G., Konya, B., Lytken, E., Mankinen, K. H., Marcon, C., Mjörnmark, J. U., Mullier, G. A., Poettgen, R., Simpson, N. D., Skorda, E., Smirnova, O., Zwalinski, L., & ATLAS Collaboration (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 s =13 TeV. Physical Review D, 105(1), Article 012006. https://doi.org/10.1103/PhysRevD.105.012006

@article{3f91d4d0bcec44339eb48c0b54acc382,

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 s =13 TeV",

abstract = "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 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. {\textcopyright} 2022 CERN.",

author = "G. Aad and T.P.A. {\AA}kesson and E.E. Corrigan and C. Doglioni and J. Geisen and E. Hansen and V. Hedberg and G. Jarlskog and B. Konya and E. Lytken and K.H. Mankinen and C. Marcon and J.U. Mj{\"o}rnmark and G.A. Mullier and R. Poettgen and N.D. Simpson and E. Skorda and O. Smirnova and L. Zwalinski and {ATLAS Collaboration}",

year = "2022",

doi = "10.1103/PhysRevD.105.012006",

language = "English",

volume = "105",

journal = "Physical Review D",

issn = "2470-0010",

publisher = "American Physical Society",

number = "1",

}

Aad, G, Åkesson, TPA, Corrigan, EE, Doglioni, C, Geisen, J, Hansen, E, Hedberg, V , Jarlskog, G , Konya, B , Lytken, E, Mankinen, KH, Marcon, C, Mjörnmark, JU, Mullier, GA, Poettgen, R, Simpson, ND, Skorda, E, Smirnova, O, Zwalinski, L & ATLAS Collaboration 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 s =13 TeV', Physical Review D, vol. 105, no. 1, 012006. https://doi.org/10.1103/PhysRevD.105.012006

TY - JOUR

T1 - Search for Higgs boson decays into a pair of pseudoscalar particles in the bbμμ final state with the ATLAS detector in pp collisions at s =13 TeV

AU - Aad, G.

AU - Åkesson, T.P.A.

AU - Corrigan, E.E.

AU - Doglioni, C.

AU - Geisen, J.

AU - Hansen, E.

AU - Hedberg, V.

AU - Jarlskog, G.

AU - Konya, B.

AU - Lytken, E.

AU - Mankinen, K.H.

AU - Marcon, C.

AU - Mjörnmark, J.U.

AU - Mullier, G.A.

AU - Poettgen, R.

AU - Simpson, N.D.

AU - Skorda, E.

AU - Smirnova, O.

AU - Zwalinski, L.

AU - ATLAS Collaboration

PY - 2022

Y1 - 2022

N2 - 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 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. © 2022 CERN.

AB - 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 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. © 2022 CERN.

U2 - 10.1103/PhysRevD.105.012006

DO - 10.1103/PhysRevD.105.012006

M3 - Article

SN - 2470-0010

VL - 105

JO - Physical Review D

JF - Physical Review D

IS - 1

M1 - 012006

ER -

Search for Higgs boson decays into a pair of pseudoscalar particles in the bbμμ final state with the ATLAS detector in pp collisions at s =13 TeV

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