Search for heavy resonances decaying into two Higgs bosons in the $${\text {b}}\bar{\textrm{b}}\tau ^{+}\tau ^{-}$$ final state in proton–proton collisions at $$\sqrt{s} = 13\,\text {Te\hspace{-.08em}V}$$

Abstract A search is presented for massive narrow-width resonances in the mass range of 1–4.5 $$\,\text {Te\hspace{-.08em}V}$$ <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:mrow> <mml:mspace/> <mml:mtext>Te</mml:mtext> <mml:mspace/> <mml:mtext>V</mml:mtext> </mml:mrow> </mml:math> , decaying into pairs of Higgs bosons (HH). The search uses proton–proton collision data at a center-of-mass energy of 13 $$\,\text {Te\hspace{-.08em}V}$$ <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:mrow> <mml:mspace/> <mml:mtext>Te</mml:mtext> <mml:mspace/> <mml:mtext>V</mml:mtext> </mml:mrow> </mml:math> collected with the CMS detector at the CERN LHC during 2016–2018, corresponding to an integrated luminosity of 138 $$\,\text {fb}^{-1}$$ <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:mrow> <mml:mspace/> <mml:msup> <mml:mtext>fb</mml:mtext> <mml:mrow> <mml:mo>-</mml:mo> <mml:mn>1</mml:mn> </mml:mrow> </mml:msup> </mml:mrow> </mml:math> . The analysis targets final states where one Higgs boson decays into a pair of bottom quarks and the other into a pair of tau leptons, $$\text {X}\rightarrow \text {HH}\rightarrow \text {b}\bar{\text {b}}\,\tau ^{+}\tau ^{-}$$ <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:mrow> <mml:mtext>X</mml:mtext> <mml:mo>→</mml:mo> <mml:mtext>HH</mml:mtext> <mml:mo>→</mml:mo> <mml:mtext>b</mml:mtext> <mml:mover> <mml:mrow> <mml:mtext>b</mml:mtext> </mml:mrow> <mml:mrow> <mml:mo>¯</mml:mo> </mml:mrow> </mml:mover> <mml:mspace/> <mml:msup> <mml:mi>τ</mml:mi> <mml:mo>+</mml:mo> </mml:msup> <mml:msup> <mml:mi>τ</mml:mi> <mml:mo>-</mml:mo> </mml:msup> </mml:mrow> </mml:math> . It uses a single large radius jet to reconstruct the $$\text {H}\rightarrow \text {b}\bar{\text {b}}$$ <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:mrow> <mml:mtext>H</mml:mtext> <mml:mo>→</mml:mo> <mml:mtext>b</mml:mtext> <mml:mover> <mml:mrow> <mml:mtext>b</mml:mtext> </mml:mrow> <mml:mrow> <mml:mo>¯</mml:mo> </mml:mrow> </mml:mover> </mml:mrow> </mml:math> decay, while the $$\text {H}\rightarrow \tau ^{+}\tau ^{-}$$ <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:mrow> <mml:mtext>H</mml:mtext> <mml:mo>→</mml:mo> <mml:msup> <mml:mi>τ</mml:mi> <mml:mo>+</mml:mo> </mml:msup> <mml:msup> <mml:mi>τ</mml:mi> <mml:mo>-</mml:mo> </mml:msup> </mml:mrow> </mml:math> decay products can either be contained within a single large radius jet or appear as two isolated tau leptons. The observed data are consistent with standard model background expectations. Upper limits at 95% confidence level are set on the production cross section for resonant HHproduction for masses between 1 and 4.5 $$\,\text {Te\hspace{-.08em}V}$$ <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:mrow> <mml:mspace/> <mml:mtext>Te</mml:mtext> <mml:mspace/> <mml:mtext>V</mml:mtext> </mml:mrow> </mml:math> . This analysis sets the most sensitive limits to date on $$\text {X}\rightarrow \text {HH}\rightarrow \text {b}\bar{\text {b}}\, \tau ^{+}\tau ^{-}$$ <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:mrow> <mml:mtext>X</mml:mtext> <mml:mo>→</mml:mo> <mml:mtext>HH</mml:mtext> <mml:mo>→</mml:mo> <mml:mtext>b</mml:mtext> <mml:mover> <mml:mrow> <mml:mtext>b</mml:mtext> </mml:mrow> <mml:mrow> <mml:mo>¯</mml:mo> </mml:mrow> </mml:mover> <mml:mspace/> <mml:msup> <mml:mi>τ</mml:mi> <mml:mo>+</mml:mo> </mml:msup> <mml:msup> <mml:mi>τ</mml:mi> <mml:mo>-</mml:mo> </mml:msup> </mml:mrow> </mml:math> decays in the mass range of 1.4–4.5 $$\,\text {Te\hspace{-.08em}V}$$ <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:mrow> <mml:mspace/> <mml:mtext>Te</mml:mtext> <mml:mspace/> <mml:mtext>V</mml:mtext> </mml:mrow> </mml:math> .

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Journal
The European Physical Journal C
Published
2026-07-30
DOI
https://doi.org/10.1140/epjc/s10052-026-15699-9
Primary Topic
Particle physics theoretical and experimental studies
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article
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article

Search for heavy resonances decaying into two Higgs bosons in the $${\text {b}}\bar{\textrm{b}}\tau ^{+}\tau ^{-}$$ final state in proton–proton collisions at $$\sqrt{s} = 13\,\text {Te\hspace{-.08em}V}$$

A. Vilela Pereira, W. L. Aldá Júnior, P. Vanlaer, Fakhri Alam Khan et al.
The European Physical Journal C
Particle physics theoretical and experimental studies
article

Search for heavy resonances decaying into two Higgs bosons in the $${\text {b}}\bar{\textrm{b}}\tau ^{+}\tau ^{-}$$ final state in proton–proton collisions at $$\sqrt{s} = 13\,\text {Te\hspace{-.08em}V}$$

A. Vilela Pereira, W. L. Aldá Júnior, P. Vanlaer, Fakhri Alam Khan, M. Soeiro, W. Waltenberger, D. Liko, P. Van Mechelen, M. Sonawane, Paul Malek, S. Turkcapar, Soumya Dansana, D. Vannerom, C. Mora Herrera, K. Skovpen, Jan van der Linden, Maryam Shooshtari, M. De Coen, Laurent Thomas, N. Van Den Bossche, S. Van Putte, G. De Lentdecker, E. Coelho, D. Matos Figueiredo, Priya Sajid Hussain, B. Bilin, C. Delaere, A. De Moor, H. Brandao Malbouisson, X. Janssen, L. Benato, Hugues Evard, B. Clerbaux, Natascha Krammer, S. Lowette, H. Kwon, Pavlo Kashko, Ahmet Oguz Guzel, В. Макаренко, L. Favart, A. Bethani, A. Tumasyan, ANDREA GIAMMANCO, J. D’Hondt, W. Adam, C. Vander Velde, M. Jeitler, A. Malara, I. Makarenko, M. Dragicevic, J. Schieck, G. A. Alves, S. Tavernier, M. Delcourt, David Marckx, T. Van Laer, G. P. Van Onsem, Paola Mastrapasqua, A. Cappati, H. Aarup Petersen, Archana Sharma, T. Menezes De Oliveira, G. Bruno, M. Vanden Bemden, J. De Favereau De Jeneret, D. Müller, I. De Bruyn, M. Tytgat, P. Rebello Teles, P. Gianneios, C. Hensel, F. Zhang, A. Li, D. Dobur, Samuel Bein, V. Lemaitre, E. J. Tonelli Manganote, A. Benecke, C.-E. Wulz, G. Gökbulut, Y. Hong, T. Bergauer, M. Barroso Ferreira Filho, R. Schöfbeck, Jas Bierkens, Jean‐Marc Vanden‐Broeck, N. Breugelmans, M. A. Shahzad, A. Khalilzadeh, D. Kavtaradze, C. Giordano, A. M. Tomaru, Karam Kaspar, Francisco Gameiro Casalinho, D. Ocampo Henao, F. Heyen, M. Matthewman, A. K. Das, V. Lemaitre, A. Hayrapetyan
article en

Abstract

Abstract A search is presented for massive narrow-width resonances in the mass range of 1–4.5 $$\,\text {Te\hspace{-.08em}V}$$ <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:mrow> <mml:mspace/> <mml:mtext>Te</mml:mtext> <mml:mspace/> <mml:mtext>V</mml:mtext> </mml:mrow> </mml:math> , decaying into pairs of Higgs bosons (HH). The search uses proton–proton collision data at a center-of-mass energy of 13 $$\,\text {Te\hspace{-.08em}V}$$ <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:mrow> <mml:mspace/> <mml:mtext>Te</mml:mtext> <mml:mspace/> <mml:mtext>V</mml:mtext> </mml:mrow> </mml:math> collected with the CMS detector at the CERN LHC during 2016–2018, corresponding to an integrated luminosity of 138 $$\,\text {fb}^{-1}$$ <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:mrow> <mml:mspace/> <mml:msup> <mml:mtext>fb</mml:mtext> <mml:mrow> <mml:mo>-</mml:mo> <mml:mn>1</mml:mn> </mml:mrow> </mml:msup> </mml:mrow> </mml:math> . The analysis targets final states where one Higgs boson decays into a pair of bottom quarks and the other into a pair of tau leptons, $$\text {X}\rightarrow \text {HH}\rightarrow \text {b}\bar{\text {b}}\,\tau ^{+}\tau ^{-}$$ <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:mrow> <mml:mtext>X</mml:mtext> <mml:mo>→</mml:mo> <mml:mtext>HH</mml:mtext> <mml:mo>→</mml:mo> <mml:mtext>b</mml:mtext> <mml:mover> <mml:mrow> <mml:mtext>b</mml:mtext> </mml:mrow> <mml:mrow> <mml:mo>¯</mml:mo> </mml:mrow> </mml:mover> <mml:mspace/> <mml:msup> <mml:mi>τ</mml:mi> <mml:mo>+</mml:mo> </mml:msup> <mml:msup> <mml:mi>τ</mml:mi> <mml:mo>-</mml:mo> </mml:msup> </mml:mrow> </mml:math> . It uses a single large radius jet to reconstruct the $$\text {H}\rightarrow \text {b}\bar{\text {b}}$$ <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:mrow> <mml:mtext>H</mml:mtext> <mml:mo>→</mml:mo> <mml:mtext>b</mml:mtext> <mml:mover> <mml:mrow> <mml:mtext>b</mml:mtext> </mml:mrow> <mml:mrow> <mml:mo>¯</mml:mo> </mml:mrow> </mml:mover> </mml:mrow> </mml:math> decay, while the $$\text {H}\rightarrow \tau ^{+}\tau ^{-}$$ <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:mrow> <mml:mtext>H</mml:mtext> <mml:mo>→</mml:mo> <mml:msup> <mml:mi>τ</mml:mi> <mml:mo>+</mml:mo> </mml:msup> <mml:msup> <mml:mi>τ</mml:mi> <mml:mo>-</mml:mo> </mml:msup> </mml:mrow> </mml:math> decay products can either be contained within a single large radius jet or appear as two isolated tau leptons. The observed data are consistent with standard model background expectations. Upper limits at 95% confidence level are set on the production cross section for resonant HHproduction for masses between 1 and 4.5 $$\,\text {Te\hspace{-.08em}V}$$ <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:mrow> <mml:mspace/> <mml:mtext>Te</mml:mtext> <mml:mspace/> <mml:mtext>V</mml:mtext> </mml:mrow> </mml:math> . This analysis sets the most sensitive limits to date on $$\text {X}\rightarrow \text {HH}\rightarrow \text {b}\bar{\text {b}}\, \tau ^{+}\tau ^{-}$$ <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:mrow> <mml:mtext>X</mml:mtext> <mml:mo>→</mml:mo> <mml:mtext>HH</mml:mtext> <mml:mo>→</mml:mo> <mml:mtext>b</mml:mtext> <mml:mover> <mml:mrow> <mml:mtext>b</mml:mtext> </mml:mrow> <mml:mrow> <mml:mo>¯</mml:mo> </mml:mrow> </mml:mover> <mml:mspace/> <mml:msup> <mml:mi>τ</mml:mi> <mml:mo>+</mml:mo> </mml:msup> <mml:msup> <mml:mi>τ</mml:mi> <mml:mo>-</mml:mo> </mml:msup> </mml:mrow> </mml:math> decays in the mass range of 1.4–4.5 $$\,\text {Te\hspace{-.08em}V}$$ <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:mrow> <mml:mspace/> <mml:mtext>Te</mml:mtext> <mml:mspace/> <mml:mtext>V</mml:mtext> </mml:mrow> </mml:math> .

The European Physical Journal CVol. 86(7)
University of Notre Dame (US), Université Libre de Bruxelles (BE), A. Alikhanyan National Laboratory (AM), Vrije Universiteit Brussel (BE), TU Wien (AT), University of Antwerp (BE), University of California, Santa Barbara (US), Yerevan State University (AM), Ghent University Hospital (BE), Universidade do Estado do Rio de Janeiro (BR), Centro Brasileiro de Pesquisas Físicas (BR), Institute of High Energy Physics (AT), RWTH Aachen University (DE), UCLouvain (BE)
National Science Foundation, U.S. Department of Energy, Alfred P. Sloan Foundation, Welch Foundation, Kavli Foundation, Alexander von Humboldt-Stiftung, Nvidia, Weston Havens Foundation, CERN, European Commission, Department of Science and Technology, Ministry of Science and Technology, India, Science Foundation Ireland, Deutsche Forschungsgemeinschaft, Fundação de Amparo à Pesquisa do Estado de São Paulo, National Natural Science Foundation of China, Ministerstvo Školství, Mládeže a Tělovýchovy, Fonds National de la Recherche Luxembourg, National Science Council, Coordenação de Aperfeiçoamento de Pessoal de Nível Superior, Austrian Science Fund, Fonds De La Recherche Scientifique - FNRS, Fonds Wetenschappelijk Onderzoek, Consejo Nacional de Ciencia y Tecnología, Ministerio de Economía y Competitividad, Bulgarian National Science Fund, Conselho Nacional de Desenvolvimento Científico e Tecnológico, Magyar Tudományos Akadémia, A.G. Leventis Foundation, Fundação de Amparo à Pesquisa do Estado do Rio Grande do Sul, Secretaría de Educación Superior, Ciencia, Tecnología e Innovación, Türkiye Bilimsel ve Teknolojik Araştırma Kurumu, Ministry of Education, India, Fundação Carlos Chagas Filho de Amparo à Pesquisa do Estado do Rio de Janeiro, National Academy of Sciences of Ukraine, Centre National de la Recherche Scientifique, Shota Rustaveli National Science Foundation, Universidad Autónoma de San Luis Potosí, Latvijas Zinātnes Padome, Benemérita Universidad Autónoma de Puebla, Pakistan Atomic Energy Commission, Ministry of Science,Technology and Research, University of Science and Technology of China, Beijing Municipal Science and Technology Commission, Nemzeti Kutatási Fejlesztési és Innovációs Hivatal, Hellenic Foundation for Research and Innovation, Ministry of Science and ICT, South Korea, Narodowa Agencja Wymiany Akademickiej, Ministry of Higher Education, Science, Research and Innovation, Thailand, Qatar National Research Fund, Science and Technology Facilities Council, Fundação para a Ciência e a Tecnologia, Fonds pour la Formation à la Recherche dans l’Industrie et dans l’Agriculture, European Regional Development Fund, Agencia Estatal de Investigación, Fundamental Research Funds for the Central Universities, Institut National de Physique Nucléaire et de Physique des Particules
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Particle physics theoretical and experimental studies
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