Search for exotic decays of the Higgs boson to a pair of pseudoscalars in the μμbb and ττbb final states

. 2024 ; 84 (5) : 493. [epub] 20240514

Status PubMed-not-MEDLINE Jazyk angličtina Země Francie Médium print-electronic

Typ dokumentu časopisecké články

Perzistentní odkaz   https://www.medvik.cz/link/pmid38757620

A search for exotic decays of the Higgs boson (H) with a mass of 125GeV to a pair of light pseudoscalars a1 is performed in final states where one pseudoscalar decays to two b quarks and the other to a pair of muons or τ leptons. A data sample of proton-proton collisions at s=13TeV corresponding to an integrated luminosity of 138fb-1 recorded with the CMS detector is analyzed. No statistically significant excess is observed over the standard model backgrounds. Upper limits are set at 95% confidence level (CL) on the Higgs boson branching fraction to μμbb and to ττbb, via a pair of a1s. The limits depend on the pseudoscalar mass ma1 and are observed to be in the range (0.17-3.3) ×10-4 and (1.7-7.7) ×10-2 in the μμbb and ττbb final states, respectively. In the framework of models with two Higgs doublets and a complex scalar singlet (2HDM+S), the results of the two final states are combined to determine upper limits on the branching fraction B(H→a1a1→ℓℓbb) at 95% CL, with ℓ being a muon or a τ lepton. For different types of 2HDM+S, upper bounds on the branching fraction B(H→a1a1) are extracted from the combination of the two channels. In most of the Type II 2HDM+S parameter space, B(H→a1a1) values above 0.23 are excluded at 95% CL for ma1 values between 15 and 60GeV.

1 Physikalisches Institut RWTH Aachen University Aachen Germany

3 Physikalisches Institut A RWTH Aachen University Aachen Germany

3 Physikalisches Institut B RWTH Aachen University Aachen Germany

Academy of Scientific Research and Technology of the Arab Republic of Egypt Egyptian Network of High Energy Physics Cairo Egypt

Adiyaman University Adiyaman Turkey

Ain Shams University Cairo Egypt

Another Institute or International Laboratory Covered by a Cooperation Agreement with CERN Geneva Switzerland

Authors Affiliated with an Institute or an International Laboratory Covered by a Cooperation Agreement with CERN Geneva Switzerland

Baylor University Waco TX USA

Beihang University Beijing China

Benemerita Universidad Autonoma de Puebla Puebla Mexico

Bergische University Wuppertal Wuppertal Germany

Bethel University St Paul MN USA

Bingol University Bingol Turkey

Birla Institute of Technology Mesra Mesra India

Bogazici University Istanbul Turkey

Boston University Boston MA USA

Bozok Universitesi Rektörlügü Yozgat Turkey

Brandenburg University of Technology Cottbus Germany

British University in Egypt Cairo Egypt

Brown University Providence RI USA

Brunel University Uxbridge UK

Cairo University Cairo Egypt

California Institute of Technology Pasadena CA USA

Carnegie Mellon University Pittsburgh PA USA

Catholic University of America Washington DC USA

Center for High Energy Physics Fayoum University El Fayoum Egypt

Centro Brasileiro de Pesquisas Fisicas Rio de Janeiro Brazil

Centro de Investigacion y de Estudios Avanzados del IPN Mexico City Mexico

Centro de Investigaciones Energéticas Medioambientales y Tecnológicas Madrid Spain

Centro Siciliano di Fisica Nucleare e di Struttura Della Materia Catania Italy

CERN European Organization for Nuclear Research Geneva Switzerland

Charles University Prague Czech Republic

China Center of Advanced Science and Technology Beijing China

China Spallation Neutron Source Dongguan Guangdong China

College of Engineering and Technology American University of the Middle East Dasman Kuwait

Consejo Nacional de Ciencia y Tecnología Mexico City Mexico

Consiglio Nazionale delle Ricerche Istituto Officina dei Materiali Perugia Italy

Cornell University Ithaca NY USA

Department of Applied Physics Faculty of Science and Technology Universiti Kebangsaan Malaysia Bangi Malaysia

Department of Physics Isfahan University of Technology Isfahan Iran

Department of Physics Kyung Hee University Seoul Korea

Department of Physics Tsinghua University Beijing China

Department of Physics University of California Santa Barbara Santa Barbara CA USA

Department of Physics University of Helsinki Helsinki Finland

Department of Physics University of Ruhuna Matara Sri Lanka

Department of Physics University of Science and Technology of Mazandaran Behshahr Iran

Department of Physics Yonsei University Seoul Korea

Deutsches Elektronen Synchrotron Hamburg Germany

Ecole Polytechnique Fédérale Lausanne Lausanne Switzerland

Erciyes University Kayseri Turkey

Erzincan Binali Yildirim University Erzincan Turkey

Escuela Politecnica Nacional Quito Ecuador

ETH Zurich Institute for Particle Physics and Astrophysics Zurich Switzerland

Faculty of Computer Science Electronics and Telecommunications AGH University of Krakow Kraków Poland

Faculty of Electrical Engineering Mechanical Engineering and Naval Architecture University of Split Split Croatia

Faculty of Engineering Istanbul University Cerrahpasa Istanbul Turkey

Faculty of Informatics University of Debrecen Debrecen Hungary

Faculty of Physics University of Belgrade Belgrade Serbia

Faculty of Science Monash University Clayton Australia

Faculty of Science University of Split Split Croatia

Federal University of Rio Grande do Sul Porto Alegre Brazil

Fermi National Accelerator Laboratory Batavia IL USA

Florida Institute of Technology Melbourne FL USA

Florida State University Tallahassee FL USA

Forschungszentrum Jülich Jülich Germany

Georgian Technical University Tbilisi Georgia

Ghent University Ghent Belgium

Hacettepe University Ankara Turkey

Hanyang University Seoul Korea

Helsinki Institute of Physics Helsinki Finland

Helwan University Cairo Egypt

Henan Normal University Xinxiang China

High Energy Physics Research Unit Department of Physics Faculty of Science Chulalongkorn University Bangkok Thailand

Horia Hulubei National Institute of Physics and Nuclear Engineering Bucharest Romania

HUN REN Wigner Research Centre for Physics Budapest Hungary

IIT Bhubaneswar Bhubaneswar India

Imperial College London UK

Indian Institute of Science Bangalore India

Indian Institute of Science Education and Research Pune India

Indian Institute of Technology Madras Chennai India

INFN Laboratori Nazionali di Frascati Frascati Italy

INFN Sezione di Bari Università di Bari Politecnico di Bari Bari Italy

INFN Sezione di Bologna Università di Bologna Bologna Italy

INFN Sezione di Catania Università di Catania Catania Italy

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INFN Sezione di Napoli Università di Napoli 'Federico II' Naples Italy; Università della Basilicata Potenza Italy; Scuola Superiore Meridionale Naples Italy

INFN Sezione di Padova Università di Padova Padua Italy; Università di Trento Trento Italy

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INFN Sezione di Roma Sapienza Università di Roma Rome Italy

INFN Sezione di Torino Università di Torino Turin Italy; Università del Piemonte Orientale Novara Italy

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Institut de Physique des 2 Infinis de Lyon Villeurbanne France

Institut für Hochenergiephysik Vienna Austria

Institute for Nuclear Research and Nuclear Energy Bulgarian Academy of Sciences Sofia Bulgaria

Institute for Research in Fundamental Sciences Tehran Iran

Institute for Scintillation Materials of National Academy of Science of Ukraine Kharkiv Ukraine

Institute for Universe and Elementary Particles Chonnam National University Kwangju Korea

Institute of Basic and Applied Sciences Faculty of Engineering Arab Academy for Science Technology and Maritime Transport Alexandria Egypt

Institute of Experimental Physics Faculty of Physics University of Warsaw Warsaw Poland

Institute of High Energy Physics Beijing China

Institute of Modern Physics and Key Laboratory of Nuclear Physics and Ion beam Application Fudan University Shanghai China

Institute of Nuclear and Particle Physics NCSR Demokritos Agia Paraskevi Greece

Institute of Nuclear Physics of the Uzbekistan Academy of Sciences Tashkent Uzbekistan

Institute of Nuclear Research ATOMKI Debrecen Hungary

Institute of Physics Bhubaneswar India

Institute of Physics University of Debrecen Debrecen Hungary

Institute or an International Laboratory Covered by a Cooperation Agreement with CERN Geneva Switzerland

Institute Rudjer Boskovic Zagreb Croatia

Instituto De Alta Investigación Universidad de Tarapacá Casilla 7 D Arica Chile

Instituto de Física de Cantabria CSIC Universidad de Cantabria Santander Spain

Instituto Universitario de Ciencias y Tecnologías Espaciales de Asturias Universidad de Oviedo Oviedo Spain

IPPP Durham University Durham UK

IRFU CEA Université Paris Saclay Gif sur Yvette France

Isfahan University of Technology Isfahan Iran

Istanbul Technical University Istanbul Turkey

Istanbul University Istanbul Turkey

Italian National Agency for New Technologies Energy and Sustainable Economic Development Bologna Italy

Izmir Bakircay University Izmir Turkey

Johns Hopkins University Baltimore MD USA

Kafkas University Kars Turkey

Kansas State University Manhattan KS USA

Karamanoğlu Mehmetbey University Karaman Turkey

Karlsruher Institut fuer Technologie Karlsruhe Germany

Konya Technical University Konya Turkey

Korea University Seoul Korea

Kyungpook National University Daegu Korea

Laboratoire d'Annecy le Vieux de Physique des Particules IN2P3 CNRS Annecy le Vieux France

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Laboratório de Instrumentação e Física Experimental de Partículas Lisbon Portugal

Lappeenranta Lahti University of Technology Lappeenranta Finland

Lawrence Livermore National Laboratory Livermore CA USA

Marmara University Istanbul Turkey

Massachusetts Institute of Technology Cambridge MA USA

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Milli Savunma University Istanbul Turkey

MTA ELTE Lendület CMS Particle and Nuclear Physics Group Eötvös Loránd University Budapest Hungary

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National Institute of Chemical Physics and Biophysics Tallinn Estonia

National Institute of Science Education and Research An OCC of Homi Bhabha National Institute Bhubaneswar Odisha India

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