Search for a low-mass neutral Higgs boson with suppressed couplings to fermions using events with multiphoton final states

Aaltonen, T. and Amerio, S. and Amidei, D. and Anastassov, A. and Annovi, A. and Nagai, Yoshikazu (2016) Search for a low-mass neutral Higgs boson with suppressed couplings to fermions using events with multiphoton final states. PHYSICAL REVIEW D, 93 (11). ISSN 2470-0010

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Abstract

A search for a Higgs boson with suppressed couplings to fermions, hf , assumed to be the neutral, lower-mass partner of the Higgs boson discovered at the Large Hadron Collider, is reported. Such a Higgs boson could exist in extensions of the standard model with two Higgs doublets, and could be produced via p¯p→H±hf →W ∗hf hf →4γ + X, where H± is a charged Higgs boson. This analysis uses all events with at least three photons in the final state from proton-antiproton collisions at a center-of-mass energy of 1.96 TeV collected by the Collider Detector at Fermilab, corresponding to an integrated luminosity of 9.2 fb−1. No evidence of a signal is observed in the data. Values of Higgs-boson masses between 10 and 100 GeV/c2 are excluded at 95% Bayesian credibility.

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