ORCID
- Vincent Drach: 0000-0001-8948-0220
- Antonio Rago: 0000-0003-1192-5538
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.
DOI Link
Publication Date
2022-01-19
Publication Title
The European Physical Journal C
Volume
82
Issue
1
ISSN
1434-6044
Acceptance Date
2021-12-06
Deposit Date
2022-08-02
Embargo Period
2022-02-10
Funding
We thank Laurence Bowes for comments on the manuscript. The work of FRL has also received funding from the European Union Horizon 2020 research and innovation program under the Marie Skłodowska-Curie Grant agreement No. 713673 and “La Caixa” Foundation (ID 100010434, LCF/BQ/IN17/11620044). FRL also acknowledges support from the Generalitat Valenciana grant PROMETEO/2019/083, the European project H2020-MSCA-ITN-2019//860881-HIDDeN, and the national project FPA2017-85985-P. FRL has also received financial support from Generalitat Valenciana through the plan GenT program (CIDEGENT/2019/040). The work has been performed under the Project HPC-EUROPA3 (INFRAIA-2016-1-730897), with the support of the EC Research Innovation Action under the H2020 Programme. AR and PF are supported by the STFC Consolidated Grant ST/P000479/1. VD is supported by the STFC Consolidated Grant ST/T00097X/1. This work was performed using the Cambridge Service for Data Driven Discovery (CSD3), part of which is operated by the University of Cambridge Research Computing on behalf of the STFC DiRAC HPC Facility (www.dirac.ac.uk). The DiRAC component of CSD3 was funded by BEIS capital funding via STFC capital grants ST/P002307/1 and ST/R002452/1 and STFC operations grant ST/R00689X/1. This work was also performed using the DiRAC Data Intensive service at Leicester, operated by the University of Leicester IT Services, which forms part of the STFC DiRAC HPC Facility (www.dirac.ac.uk). The equipment was funded by BEIS capital funding via STFC capital grants ST/K000373/1 and ST/R002363/1 and STFC DiRAC Operations grant ST/R001014/1. DiRAC is part of the National e-Infrastructure. This work used the ARCHER UK National Supercomputing Service (http://www.archer.ac.uk). We thank the University of Plymouth for providing computing time on the local HPC cluster.
Creative Commons License
This work is licensed under a Creative Commons Attribution 4.0 International License.
Recommended Citation
Drach, V., Fritzsch, P., Rago, A., & Romero-López, F. (2022) 'Singlet channel scattering in a composite Higgs model on the lattice', The European Physical Journal C, 82(1). Available at: 10.1140/epjc/s10052-021-09914-y
