Invisible Higgs boson decay in the littlest Higgs model with T-parity

Abstract

We study the invisible decay of the Higgs boson into a pair of stable, heavy photons, H -> A_H A_H, in the littlest Higgs model with T-parity. For a symmetry breaking scale of f = 450 GeV, the branching ratio H -> A_H A_H can be as high as 93% for Higgs masses below 150 GeV. For f = 500 GeV, the invisible branching ratio is about 75% in the Higgs mass range 135 - 150 GeV and 10 (5.5)% for m_H = 200 (600) GeV. It drops to a few percent for f larger than 600 GeV. We have found regions in parameter space, allowed by the electroweak precision data, with such low values of f for 115 GeV < m_H < 650 GeV.

14 pages, 3 figures, Latex; v2: a few comments and references added, typos corrected, conclusions unchanged, version to be published in Physics Letters B

References in corpus (1)

• Detecting an invisible Higgs boson at Fermilab Tevatron and CERN LHC

Cited by in corpus (9)

• Unparticle Dark Matter
• LHC signals of T-odd heavy quarks in the Littlest Higgs model
• Higgs-pair Production and Decay in Simplest Little Higgs Model
• Higgs and Z-boson FCNC decays correlated with B-meson decays in littlest Higgs model with T-parity
• Top quark FCNC decays and productions at LHC in littlest Higgs model with T-parity
• In search of an unbiased temperature estimator for statistically poor X-ray spectra
• Distinguishing the Littlest Higgs model with T-parity from supersymmetry at the LHC using trileptons
• The impossibility of heavy neutrino dark matter in the Littlest Higgs Model with T-parity: constraints from direct search
• R_b Constraints on Littlest Higgs Model with T-parity