Search for a low-mass pseudoscalar Higgs boson produced in association with a b(b)over-bar pair in pp collisions at root s=8 TeV

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Date
2016
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Volume Title
Publisher
Elsevier
Abstract

A search is reported for a light pseudoscalar Higgs boson decaying to a pair of τ leptons, produced in association with a bb̅ pair, in the context of two-Higgs-doublet models. The results are based on pp collision data at a centre-of-mass energy of 8 TeV collected by the CMS experiment at the LHC and corresponding to an integrated luminosity of 19.7 fb⁻¹. Pseudoscalar boson masses between 25 and 80 GeV are probed. No evidence for a pseudoscalar boson is found and upper limits are set on the product of cross section and branching fraction to τ pairs between 7 and 39 pb at the 95% confidence level. This excludes pseudoscalar A bosons with masses between 25 and 80 GeV, with SM-like Higgs boson negative couplings to down-type fermions, produced in association with bb̅ pairs, in Type II, two-Higgs-doublet models.

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Keywords
CMS, Physics, Higgs, MODEL, WEAK, Astronomy & Astrophysics, Physics, Nuclear, Physics, Particles & Fields
Citation
Khachatryan, V., Sirunyan, A. M., Tumasyan, A., Adam, W., Asilar, E., Bergauer, T., Brandstetter, J., Brondolin, E., Dragicevic, M., Erö, J., Flechl, M., Friedl, M., Frühwirth, R., Ghete, V. M., Hartl, C., Hörmann, N., Hrubec, J., Jeitler, M., Knünz, V., … Woods, N. (2016). Search for a low-mass pseudoscalar Higgs boson produced in association with a bb‾ pair in pp collisions at s=8 TeV. In Physics Letters B (Vol. 758, pp. 296–320). Elsevier BV. https://doi.org/10.1016/j.physletb.2016.05.003