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Universidad de Granada CAFPE

Seminario: Nondecoupling of charged scalars in Higgs to diphoton decay

Ponente: Dipankar Das, IFIC (Valencia)

Lugar: Seminario del Dpto Física Teórica y del Cosmos

Fecha: 26/02/2016

Hora (24h): 12:00

I will present some examples of two and three Higgs doublet models where the requirement of "alignment" does not necessarily guarantee decoupling. In such scenarios, a heavy charged scalar in the TeV range can have relatively large contribution to the Higgs to diphoton decay amplitude causing the signal strength to be reduced by more than 10% from the corresponding SM expectation. These types of nondecoupling scenarios can be easily ruled out by a precision measurement of the diphoton signal strength. I will also comment on a similar situation that arises in a certain limit of the type II seesaw model.