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^*

^*Corresponding author for this work

Trinity College, Dublin, Ireland
CERN
Universitat de Val ncia-CSIC

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 Nf=2 fundamental Dirac fermions and based on a finite-volume scattering formalism. The theory exhibits a SU(4) -> 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
Journal	The European Physical Journal C
Volume	82
Issue number	1
Early online date	19 Jan 2022
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-yLicence: CC BY

Drach2022 Article SingletChannelScatteringInAComFinal published version, 562 KBLicence: CC BY

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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 Nf=2 fundamental Dirac fermions and based on a finite-volume scattering formalism. The theory exhibits a SU(4) -> 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 Nf=2 fundamental Dirac fermions and based on a finite-volume scattering formalism. The theory exhibits a SU(4) -> 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 Nf=2 fundamental Dirac fermions and based on a finite-volume scattering formalism. The theory exhibits a SU(4) -> 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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