Singlet channel scattering in a Composite Higgs model on the lattice

We present the first calculation of the scattering amplitude in the singlet channel beyond QCD. The calculation is performed in SU(2) gauge theory with $N_f=2$ fundamental Dirac fermions and based on a finite-volume scattering formalism. The theory exhibits a $SU(4) \rightarrow Sp(4)$ chiral symmetr...

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Detalles Bibliográficos
Autores principales: Drach, Vincent, Fritzsch, Patrick, Rago, Antonio, Romero-López, Fernando
Lenguaje:eng
Publicado: 2021
Materias:
hep-ph
Particle Physics - Phenomenology
hep-lat
Particle Physics - Lattice
Acceso en línea:https://dx.doi.org/10.1140/epjc/s10052-021-09914-y
http://cds.cern.ch/record/2800095
Descripción
Sumario:We present the first calculation of the scattering amplitude in the singlet channel beyond QCD. The calculation is performed in SU(2) gauge theory with $N_f=2$ fundamental Dirac fermions and based on a finite-volume scattering formalism. The theory exhibits a $SU(4) \rightarrow Sp(4)$ chiral symmetry breaking pattern that is used to design minimal composite Higgs models currently tested at the LHC. Our results show that, for the range of underlying fermion mass considered, the lowest flavour singlet state is stable.

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