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Browsing Electronics Science and Technology - Publications by Subject "2HDM + S"
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    Search for an exotic decay of the Higgs boson to a pair of light pseudoscalars in the final state with two b quarks and two τ leptons in proton–proton collisions at s=13TeV
    ( 2018-10-10) Sirunyan, A. M. ; Tumasyan, A. ; Adam, W. ; Ambrogi, F. ; Asilar, E. ; Bergauer, T. ; Brandstetter, J. ; Brondolin, E. ; Dragicevic, M. ; Erö, J. ; Escalante Del Valle, A. ; Flechl, M. ; Frühwirth, R. ; Ghete, V. M. ; Hrubec, J. ; Jeitler, M. ; Krammer, N. ; Krätschmer, I. ; Liko, D. ; Madlener, T. ; Mikulec, I. ; Rad, N. ; Rohringer, H. ; Schieck, J. ; Schöfbeck, R. ; Spanring, M. ; Spitzbart, D. ; Taurok, A. ; Waltenberger, W. ; Wittmann, J. ; Wulz, C. E. ; Zarucki, M. ; Chekhovsky, V. ; Mossolov, V. ; Suarez Gonzalez, J. ; De Wolf, E. A. ; Di Croce, D. ; Janssen, X. ; Lauwers, J. ; Pieters, M. ; Van De Klundert, M. ; Van Haevermaet, H. ; Van Mechelen, P. ; Van Remortel, N. ; Abu Zeid, S. ; Blekman, F. ; D'Hondt, J. ; De Bruyn, I. ; De Clercq, J. ; Deroover, K. ; Flouris, G. ; Lontkovskyi, D. ; Lowette, S. ; Marchesini, I. ; Moortgat, S. ; Moreels, L. ; Python, Q. ; Skovpen, K. ; Tavernier, S. ; Van Doninck, W. ; Van Mulders, P. ; Van Parijs, I. ; Beghin, D. ; Bilin, B. ; Brun, H. ; Clerbaux, B. ; De Lentdecker, G. ; Delannoy, H. ; Dorney, B. ; Fasanella, G. ; Favart, L. ; Goldouzian, R. ; Grebenyuk, A. ; Kalsi, A. K. ; Lenzi, T. ; Luetic, J. ; Postiau, N. ; Starling, E. ; Thomas, L. ; Vander Velde, C. ; Vanlaer, P. ; Vannerom, D. ; Wang, Q. ; Cornelis, T. ; Dobur, D. ; Fagot, A. ; Gul, M. ; Khvastunov, I. ; Poyraz, D. ; Roskas, C. ; Trocino, D. ; Tytgat, M. ; Verbeke, W. ; Vermassen, B. ; Vit, M. ; Zaganidis, N. ; Bakhshiansohi, H. ; Bondu, O. ; Brochet, S. ; Bruno, G.
    A search for an exotic decay of the Higgs boson to a pair of light pseudoscalar bosons is performed for the first time in the final state with two b quarks and two τ leptons. The search is motivated in the context of models of physics beyond the standard model (SM), such as two Higgs doublet models extended with a complex scalar singlet (2HDM + S), which include the next-to-minimal supersymmetric SM (NMSSM). The results are based on a data set of proton–proton collisions corresponding to an integrated luminosity of 35.9fb−1, accumulated by the CMS experiment at the LHC in 2016 at a center-of-mass energy of 13TeV. Masses of the pseudoscalar boson between 15 and 60GeV are probed, and no excess of events above the SM expectation is observed. Upper limits between 3 and 12% are set on the branching fraction B(h→aa→2τ2b) assuming the SM production of the Higgs boson. Upper limits are also set on the branching fraction of the Higgs boson to two light pseudoscalar bosons in different 2HDM + S scenarios. Assuming the SM production cross section for the Higgs boson, the upper limit on this quantity is as low as 20% for a mass of the pseudoscalar of 40GeV in the NMSSM.