Search for an exotic decay of the Higgs boson into a Z boson and a pseudoscalar particle in proton-proton collisions at √𝑠 = 13 TeV

The CMS collaboration; A. Hayrapetyan; A. Tumasyan; W. Adam; Laurent Forthomme; H. Kirschenmann; K. Österberg; M. Voutilainen; Shudhashil Bharthuar; Erik Brücken; F. Garcia; J. Havukainen; Jaana Heikkilä; Kimmo Kallonen; Minsuk Kim; R. Kinnunen; T. Lampén; K. Lassila-Perini; S. Laurila; S. Lehti; T. Lindén; Mikko Lotti; P. Luukka; Laura Martikainen; Mikael Erkki Johannes Myllymäki; Juska Pekkanen; Milla-Maarit Rantanen; H. Siikonen; E. Tuominen; J. Tuominiemi; Jussi Viinikainen; H. Petrow; T. Tuuva

doi:10.1016/j.physletb.2024.138582

Search for an exotic decay of the Higgs boson into a Z boson and a pseudoscalar particle in proton-proton collisions at √𝑠 = 13 TeV

The CMS collaboration, A. Hayrapetyan, A. Tumasyan, W. Adam, Laurent Forthomme, H. Kirschenmann, K. Österberg, M. Voutilainen, Shudhashil Bharthuar, Erik Brücken, F. Garcia, J. Havukainen, Jaana Heikkilä, Kimmo Kallonen, Minsuk Kim, R. Kinnunen, T. Lampén, K. Lassila-Perini, S. Laurila, S. LehtiT. Lindén, Mikko Lotti, P. Luukka, Laura Martikainen, Mikael Erkki Johannes Myllymäki, Juska Pekkanen, Milla-Maarit Rantanen, H. Siikonen, E. Tuominen, J. Tuominiemi, Jussi Viinikainen, H. Petrow, T. Tuuva

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Sammanfattning

A search for an exotic decay of the Higgs boson to a Z boson and a light pseudoscalar particle (a), decaying to a pair of leptons and a pair of photons, respectively, is presented. The search is based on proton-proton collision data at a center-of-mass energy of root s = 13 TeV, collected with the CMS detector at the LHC and corresponding to an integrated luminosity of 138 fb(-1). The analysis probes pseudoscalar masses m(a) between 1 and 30 GeV, leading to two pairs of well-isolated leptons and photons. Upper limits at 95% confidence level are set on the Higgs boson production cross section times its branching fraction to two leptons and two photons. The observed (expected) limits are in the range of 1.1-17.8 (1.7-17.9) f(b) within the probed m(a) interval. An excess of data above the expected standard model background with a local (global) significance of 2.6 (1.3) standard deviations is observed for a mass hypothesis of m(a) = 3 GeV. Limits on models involving axion-like particles, formulated as an effective field theory, are also reported.

Originalspråk	engelska
Artikelnummer	138582
Tidskrift	Physics Letters B
Volym	852
Antal sidor	27
ISSN	0370-2693
DOI	https://doi.org/10.1016/j.physletb.2024.138582
Status	Publicerad - maj 2024
MoE-publikationstyp	A1 Tidskriftsartikel-refererad

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10.1016/j.physletb.2024.138582Licens: CC BY

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The CMS collaboration, Hayrapetyan, A., Tumasyan, A., Adam, W., Forthomme, L., Kirschenmann, H., Österberg, K., Voutilainen, M., Bharthuar, S., Brücken, E., Garcia, F., Havukainen, J., Heikkilä, J., Kallonen, K., Kim, M., Kinnunen, R., Lampén, T., Lassila-Perini, K., Laurila, S., ... Tuuva, T. (2024). Search for an exotic decay of the Higgs boson into a Z boson and a pseudoscalar particle in proton-proton collisions at √𝑠 = 13 TeV. Physics Letters B, 852, Artikel 138582. https://doi.org/10.1016/j.physletb.2024.138582

@article{948b51574c42438083b8ceb72a0a9267,

title = "Search for an exotic decay of the Higgs boson into a Z boson and a pseudoscalar particle in proton-proton collisions at √𝑠 = 13 TeV",

abstract = "A search for an exotic decay of the Higgs boson to a Z boson and a light pseudoscalar particle (a), decaying to a pair of leptons and a pair of photons, respectively, is presented. The search is based on proton-proton collision data at a center-of-mass energy of root s = 13 TeV, collected with the CMS detector at the LHC and corresponding to an integrated luminosity of 138 fb(-1). The analysis probes pseudoscalar masses m(a) between 1 and 30 GeV, leading to two pairs of well-isolated leptons and photons. Upper limits at 95% confidence level are set on the Higgs boson production cross section times its branching fraction to two leptons and two photons. The observed (expected) limits are in the range of 1.1-17.8 (1.7-17.9) f(b) within the probed m(a) interval. An excess of data above the expected standard model background with a local (global) significance of 2.6 (1.3) standard deviations is observed for a mass hypothesis of m(a) = 3 GeV. Limits on models involving axion-like particles, formulated as an effective field theory, are also reported.",

keywords = "114 Physical sciences",

author = "{The CMS Collaboration} and A. Hayrapetyan and A. Tumasyan and W. Adam and Laurent Forthomme and H. Kirschenmann and K. {\"O}sterberg and M. Voutilainen and Shudhashil Bharthuar and Erik Br{\"u}cken and F. Garcia and J. Havukainen and Jaana Heikkil{\"a} and Kimmo Kallonen and Minsuk Kim and R. Kinnunen and T. Lamp{\'e}n and K. Lassila-Perini and S. Laurila and S. Lehti and T. Lind{\'e}n and Mikko Lotti and P. Luukka and Laura Martikainen and Myllym{\"a}ki, {Mikael Erkki Johannes} and Juska Pekkanen and Milla-Maarit Rantanen and H. Siikonen and E. Tuominen and J. Tuominiemi and Jussi Viinikainen and H. Petrow and T. Tuuva",

year = "2024",

month = may,

doi = "10.1016/j.physletb.2024.138582",

language = "English",

volume = "852",

journal = "Physics Letters B",

issn = "0370-2693",

publisher = "Elsevier B.V.",

}

The CMS collaboration, Hayrapetyan, A, Tumasyan, A, Adam, W, Forthomme, L, Kirschenmann, H , Österberg, K , Voutilainen, M, Bharthuar, S, Brücken, E , Garcia, F, Havukainen, J, Heikkilä, J, Kallonen, K, Kim, M, Kinnunen, R , Lampén, T , Lassila-Perini, K , Laurila, S , Lehti, S , Lindén, T, Lotti, M, Luukka, P, Martikainen, L, Myllymäki, MEJ , Pekkanen, J , Rantanen, M-M, Siikonen, H, Tuominen, E , Tuominiemi, J, Viinikainen, J, Petrow, H & Tuuva, T 2024, 'Search for an exotic decay of the Higgs boson into a Z boson and a pseudoscalar particle in proton-proton collisions at √𝑠 = 13 TeV', Physics Letters B, vol. 852, 138582. https://doi.org/10.1016/j.physletb.2024.138582

TY - JOUR

T1 - Search for an exotic decay of the Higgs boson into a Z boson and a pseudoscalar particle in proton-proton collisions at √𝑠 = 13 TeV

AU - The CMS Collaboration

AU - Hayrapetyan, A.

AU - Tumasyan, A.

AU - Adam, W.

AU - Forthomme, Laurent

AU - Kirschenmann, H.

AU - Österberg, K.

AU - Voutilainen, M.

AU - Bharthuar, Shudhashil

AU - Brücken, Erik

AU - Garcia, F.

AU - Havukainen, J.

AU - Heikkilä, Jaana

AU - Kallonen, Kimmo

AU - Kim, Minsuk

AU - Kinnunen, R.

AU - Lampén, T.

AU - Lassila-Perini, K.

AU - Laurila, S.

AU - Lehti, S.

AU - Lindén, T.

AU - Lotti, Mikko

AU - Luukka, P.

AU - Martikainen, Laura

AU - Myllymäki, Mikael Erkki Johannes

AU - Pekkanen, Juska

AU - Rantanen, Milla-Maarit

AU - Siikonen, H.

AU - Tuominen, E.

AU - Tuominiemi, J.

AU - Viinikainen, Jussi

AU - Petrow, H.

AU - Tuuva, T.

PY - 2024/5

Y1 - 2024/5

N2 - A search for an exotic decay of the Higgs boson to a Z boson and a light pseudoscalar particle (a), decaying to a pair of leptons and a pair of photons, respectively, is presented. The search is based on proton-proton collision data at a center-of-mass energy of root s = 13 TeV, collected with the CMS detector at the LHC and corresponding to an integrated luminosity of 138 fb(-1). The analysis probes pseudoscalar masses m(a) between 1 and 30 GeV, leading to two pairs of well-isolated leptons and photons. Upper limits at 95% confidence level are set on the Higgs boson production cross section times its branching fraction to two leptons and two photons. The observed (expected) limits are in the range of 1.1-17.8 (1.7-17.9) f(b) within the probed m(a) interval. An excess of data above the expected standard model background with a local (global) significance of 2.6 (1.3) standard deviations is observed for a mass hypothesis of m(a) = 3 GeV. Limits on models involving axion-like particles, formulated as an effective field theory, are also reported.

AB - A search for an exotic decay of the Higgs boson to a Z boson and a light pseudoscalar particle (a), decaying to a pair of leptons and a pair of photons, respectively, is presented. The search is based on proton-proton collision data at a center-of-mass energy of root s = 13 TeV, collected with the CMS detector at the LHC and corresponding to an integrated luminosity of 138 fb(-1). The analysis probes pseudoscalar masses m(a) between 1 and 30 GeV, leading to two pairs of well-isolated leptons and photons. Upper limits at 95% confidence level are set on the Higgs boson production cross section times its branching fraction to two leptons and two photons. The observed (expected) limits are in the range of 1.1-17.8 (1.7-17.9) f(b) within the probed m(a) interval. An excess of data above the expected standard model background with a local (global) significance of 2.6 (1.3) standard deviations is observed for a mass hypothesis of m(a) = 3 GeV. Limits on models involving axion-like particles, formulated as an effective field theory, are also reported.

KW - 114 Physical sciences

U2 - 10.1016/j.physletb.2024.138582

DO - 10.1016/j.physletb.2024.138582

M3 - Article

SN - 0370-2693

VL - 852

JO - Physics Letters B

JF - Physics Letters B

M1 - 138582

ER -