Singlet channel scattering in a composite Higgs model on the lattice

Vincent Drach; Patrick Fritzsch; Antonio Rago; Fernando Romero-López

doi:10.1140/epjc/s10052-021-09914-y

Singlet channel scattering in a composite Higgs model on the lattice

Vincent Drach
, Patrick Fritzsch
, Antonio Rago
, Fernando Romero-López

Research output: Contribution to journal › Article › peer-review

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Abstract

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.

Original language	English
Pages (from-to)	47
Journal	The European Physical Journal C - Particles and Fields
Volume	82
Issue number	1
DOIs	https://doi.org/10.1140/epjc/s10052-021-09914-y
Publication status	Published - 19 Jan 2022

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10.1140/epjc/s10052-021-09914-y

s10052-021-09914-yFinal published version, 557 KBLicence: CC BY

https://link.springer.com/10.1140/epjc/s10052-021-09914-y

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abstract = "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) \textbackslash{}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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AU - Romero-López, Fernando

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Y1 - 2022/1/19

N2 - 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.

AB - 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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Singlet channel scattering in a composite Higgs model on the lattice

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