# Search for a very light NMSSM Higgs boson produced in decays of the 125 GeV scalar boson and decaying into τ leptons in pp collisions at $\sqrt{s}$ = 8 TeV

CMS Collaboration; Canelli, F; Chiochia, V; Kilminster, B; Robmann, P; et al (2016). Search for a very light NMSSM Higgs boson produced in decays of the 125 GeV scalar boson and decaying into τ leptons in pp collisions at $\sqrt{s}$ = 8 TeV. Journal of High Energy Physics, 1601:1-44.

## Abstract

A search for a very light Higgs boson decaying into a pair of τ leptons is presented within the framework of the next-to-minimal supersymmetric standard model. This search is based on a data set corresponding to an integrated luminosity of 19.7 fb$^{−1}$ of proton-proton collisions collected by the CMS experiment at a centre-of-mass energy of 8 TeV. The signal is defined by the production of either of the two lightest scalars, h$_{1}$ or h$_{2}$, via gluon-gluon fusion and subsequent decay into a pair of the lightest Higgs bosons, a$_{1}$ or h$_{1}$. The h$_{1}$ or h$_{2}$ boson is identified with the observed state at a mass of 125GeV. The analysis searches for decays of the a$_{1}$ (h$_{1}$) states into pairs of τ leptons and covers a mass range for the a$_{1}$ (h$_{1}$) boson of 4 to 8GeV. The search reveals no significant excess in data above standard model background expectations, and an upper limit is set on the signal production cross section times branching fraction as a function of the a$_{1}$ (h$_{1}$) boson mass. The 95% confidence level limit ranges from 4.5 pb at m$_{a_{1}}$ (m$_{h_{1}}$) = 8GeV to 10.3pb at m$_{a_{1}}$ (m$_{h_{1}}$) = 5GeV.

## Abstract

A search for a very light Higgs boson decaying into a pair of τ leptons is presented within the framework of the next-to-minimal supersymmetric standard model. This search is based on a data set corresponding to an integrated luminosity of 19.7 fb$^{−1}$ of proton-proton collisions collected by the CMS experiment at a centre-of-mass energy of 8 TeV. The signal is defined by the production of either of the two lightest scalars, h$_{1}$ or h$_{2}$, via gluon-gluon fusion and subsequent decay into a pair of the lightest Higgs bosons, a$_{1}$ or h$_{1}$. The h$_{1}$ or h$_{2}$ boson is identified with the observed state at a mass of 125GeV. The analysis searches for decays of the a$_{1}$ (h$_{1}$) states into pairs of τ leptons and covers a mass range for the a$_{1}$ (h$_{1}$) boson of 4 to 8GeV. The search reveals no significant excess in data above standard model background expectations, and an upper limit is set on the signal production cross section times branching fraction as a function of the a$_{1}$ (h$_{1}$) boson mass. The 95% confidence level limit ranges from 4.5 pb at m$_{a_{1}}$ (m$_{h_{1}}$) = 8GeV to 10.3pb at m$_{a_{1}}$ (m$_{h_{1}}$) = 5GeV.

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## Additional indexing

Item Type: Journal Article, refereed, original work 07 Faculty of Science > Physics Institute 530 Physics Physical Sciences > Nuclear and High Energy Physics English 2016 09 Jan 2017 10:19 14 Jul 2020 15:03 Springer 1029-8479 Gold Publisher DOI. An embargo period may apply. https://doi.org/10.1007/JHEP01(2016)079

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