# Contributions of flavor violating couplings of a Higgs boson to pp → W W

Journal of High Energy Physics, Aug 2015

We study contributions to $$pp\to {W}^{+}{W}^{-}\to \ell {\nu}_{\ell }{\ell}^{\prime }{\nu}_{\ell^{\prime }}$$ in models with a new Higgs boson, H, and a neutral lepton, ν 4, with couplings H − ν 4 − ν μ and W − ν 4 − $$\mu$$ through the process pp → H → ν 4 ν μ  → Wμν μ  → ℓν ℓ μν μ . Contrary to naive expectations, we find that contributions to pp → W W can be very large while satisfying constraints from standard H → W W and H → γγ searches. Even the excess observed by ATLAS in pp → W W , if taken at face value, can be easily accommodated. The various kinematic distributions fit nicely the experimentally determined ones. This scenario can arise for example in a two Higgs doublet model with vectorlike leptons.

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Radovan Dermíšek, Enrico Lunghi, Seodong Shin. Contributions of flavor violating couplings of a Higgs boson to pp → W W, Journal of High Energy Physics, 2015, 126, DOI: 10.1007/JHEP08(2015)126