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Search for a very light NMSSM Higgs boson produced in decays of the 125 GeV scalar boson and decaying into ? leptons in pp collisions at ?s=8 TeV

Abstract: A search for a very light Higgs boson decaying into a pair of ? 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, h1 or h2, via gluon-gluon fusion and subsequent decay into a pair of the lightest Higgs bosons, a1 or h1. The h1 or h2 boson is identified with the observed state at a mass of 125 GeV. The analysis searches for decays of the a1 (h1) states into pairs of ? leptons and covers a mass range for the a1 (h1) boson of 4 to 8 GeV. 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 a1 (h1) boson mass. The 95% confidence level limit ranges from 4.5 pb at ma1(mh1) = 8 GeV to 10.3 pb at ma1(mh1)=5 GeV.

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Fuente: Journal of High Energy Physics, Vol. 2016, Num. 1, Art. Num. 079

Editorial: Springer Verlag

Fecha de publicación: 01/01/2016

Nº de páginas: 46

Tipo de publicación: Artículo de Revista

ISSN: 1126-6708,1029-8479

Url de la publicación: https://doi.org/10.1007/JHEP01(2016)079

Autores/as

JUAN RAMON CASTIÑEIRAS DE SAA

PABLO DE CASTRO MANZANO

JUAN GARCIA FERRERO

MARIA AMPARO LOPEZ VIRTO

RAFAEL JOSE MARCO DE LUCAS

FRANCISCA JAVIELA MUÑOZ SANCHEZ

ANA YAIZA RODRIGUEZ MARRERO