دورية أكاديمية
Search for exotic decays of the Higgs boson to a pair of pseudoscalars in the μμbb and ττbb final states
| العنوان: | Search for exotic decays of the Higgs boson to a pair of pseudoscalars in the μμbb and ττbb final states |
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| المؤلفون: | CMS Collaboration, Hayrapetyan, A., Erdmann, Wolfram, Horisberger, Roland, Aarrestad, Thea K., Androsov, Konstantin, Backhaus, Malte, Calandri, Alessandro, Cazzaniga, Cesare, Datta, Kaustuv, id_orcid:0 000-0002-6674-0015, De Cosa, Annapaola, Dissertori, Günther, Dittmar, M., Donegà, Mauro, Galli, Massimiliano, Gedia, Krunal, Glessgen, Franz, Grab, Christophorus, id_orcid:0 000-0002-6182-3380, Hits, Dmitry Alexandrovich, id_orcid:0 000-0002-3135-6427, Lustermann, Werner, Lyon, Anne-Mazarine, Manzoni, Riccardo Andrea, Marchegiani, Matteo, Marchese, Luigi, Martin Perez, Cristina, Mascellani, Anna, Nessi-Tedaldi, Francesca, Pauss, Felicitas, Perovic, Vasilije, Pigazzini, Simone, id_orcid:0 000-0002-8046-4344, Ratti, Maria Giulia, Reichmann, Michael, id_orcid:0 000-0002-6220-5496, Reissel, Christina, Reitenspiess, Thomas, Ristic, Branislav, id_orcid:0 000-0002-8610-1130, Riti, Federica, Ruini, D., Sanz Becerra, Diego Alejandro, Seidita, Roberto, Steggemann, Jan, Valsecchi, Davide, Wallny, Rainer, id_orcid:0 000-0001-8038-1613 |
| المصدر: | The European Physical Journal C, 84 (5) |
| بيانات النشر: | Springer |
| سنة النشر: | 2024 |
| المجموعة: | ETH Zürich Research Collection |
| الوصف: | A search for exotic decays of the Higgs boson (H) with a mass of 125 GeV 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 = 13 TeV cor- responding to an integrated luminosity of 138 fb^−1 recorded with the CMS detector is analyzed. No statistically signifi- cant 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 a_1 s. The limits depend on the pseudoscalar mass m_a1 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, respec- tively. 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 → a_1 a_1 → llbb) at 95% CL, with being a muon or a τ lepton. For different types of 2HDM+S, upper bounds on the branching fraction B(H → a_1 a_1) are extracted from the combination of the two channels. In most of the Type II 2HDM+S parameter space, B(H → a_1 a_1) values above 0.23 are excluded at 95% CL for m_a1 values between 15 and 60 GeV. ; ISSN:1434-6044 ; ISSN:1434-6052 |
| نوع الوثيقة: | article in journal/newspaper |
| وصف الملف: | application/application/pdf |
| اللغة: | English |
| العلاقة: | info:eu-repo/grantAgreement/EC/H2020/758316; http://hdl.handle.net/20.500.11850/674379Test |
| DOI: | 10.3929/ethz-b-000674379 |
| الإتاحة: | https://doi.org/20.500.11850/67437910.3929/ethz-b-00067437910.1140/epjc/s10052-024-12727-4Test https://hdl.handle.net/20.500.11850/674379Test |
| حقوق: | info:eu-repo/semantics/openAccess ; http://creativecommons.org/licenses/by/4.0Test/ ; Creative Commons Attribution 4.0 International |
| رقم الانضمام: | edsbas.44EBEF10 |
| قاعدة البيانات: | BASE |
| DOI: | 10.3929/ethz-b-000674379 |
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