Predicting the positive parity and zero spin of the Higgs boson?

• A
Can we predict the positive parity, and zero spin of the Higgs boson from the decay mode: 𝐻 → 𝛾𝛾?

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##H\to \gamma\gamma## tells you that it is not spin-1, because that decay is forbidden by the Landau-Yang theorem.

I think the mere existence of that decay channel does not exclude anything else for spin and parity, without more detailed analyses of the decays.

vanhees71 and Intesar
Staff Emeritus
2019 Award
What have you tried?

This paper (https://arxiv.org/pdf/1506.05669.pdf) is using ##H\to \gamma\gamma## to study the spin-2 hypothesis (but they also use other channels), but it does not seem to be sensitive to the pseudo-scalar hypothesis.

Intesar
Do we expect that parity and spin are conserved in this particular decay? If so can we use the spin and parity of the two photons to predict those for the H boson?

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mfb
Mentor
ATLAS and CMS wrote multiple papers about that. Did you read them?

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