https://scholars.lib.ntu.edu.tw/handle/123456789/574601
標題: | Search for an exotic decay of the Higgs boson to a pair of light pseudoscalars in the final state with two muons and two b quarks in pp collisions at 13 TeV | 作者: | Sirunyan A.M. et al. Tumasyan, A. Adam, W. Ambrogi, F. Asilar, E. Bergauer, T. Brandstetter, J. 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. 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. PAO-TI CHANG KAI-FENG CHEN WEI-SHU HOU RONG-SHYANG LU Stathes Paganis |
公開日期: | 2019 | 卷: | 795 | 起(迄)頁: | 398-423 | 來源出版物: | Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics | 摘要: | A search for exotic decays of the Higgs boson to a pair of light pseudoscalar particles a1 is performed under the hypothesis that one of the pseudoscalars decays to a pair of opposite sign muons and the other decays to bb?. Such signatures are predicted in a number of extensions of the standard model (SM), including next-to-minimal supersymmetry and two-Higgs-doublet models with an additional scalar singlet. The results are based on a data set of proton-proton collisions corresponding to an integrated luminosity of 35.9 fb?1, accumulated with the CMS experiment at the CERN LHC in 2016 at a centre-of-mass energy of 13 TeV. No statistically significant excess is observed with respect to the SM backgrounds in the search region for pseudoscalar masses from 20 GeV to half of the Higgs boson mass. Upper limits at 95% confidence level are set on the product of the production cross section and branching fraction, σhB(h→a1a1→μ+μ?bb?), ranging from 5 to 33 fb, depending on the pseudoscalar mass. Corresponding limits on the branching fraction, assuming the SM prediction for σh, are (1–7)×10?4. ? 2019 The Author(s) |
URI: | https://www.scopus.com/inward/record.uri?eid=2-s2.0-85067981296&doi=10.1016%2fj.physletb.2019.06.021&partnerID=40&md5=e1602a02b1004f23a4ae8b09afc5c55b https://scholars.lib.ntu.edu.tw/handle/123456789/574601 |
ISSN: | 3702693 | DOI: | 10.1016/j.physletb.2019.06.021 |
顯示於: | 物理學系 |
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