dc.contributor.author Arthur, R en dc.contributor.author Drach, V en dc.contributor.author Hietanen, A en dc.contributor.author Pica, C en dc.contributor.author Sannino, F en dc.date.accessioned 2018-03-08T08:47:47Z dc.date.available 2018-03-08T08:47:47Z dc.identifier.uri http://hdl.handle.net/10026.1/11012 dc.description 18 pages, 9 figures en dc.description.abstract We investigate the scalar and pseudoscalar spectrum of the $SU(2)$ gauge theory with $N_f=2$ flavours of fermions in the fundamental representation using non perturbative lattice simulations. We provide first benchmark estimates of the mass of the lightest $0(0^{+})$ ($\sigma$), $0(0^{-})$ ($\eta'$) and $1(0^+)$ ($a_0$) states, including estimates of the relevant disconnected contributions. We find $m_{a_0}/F_{\rm{PS}}= 16.7(4.9)$, $m_\sigma/F_{\rm{PS}}=19.2(10.8)$ and $m_{\eta'}/F_{\rm{PS}} = 12.8(4.7)$. These values for the masses of light scalar states provide crucial information for composite extensions of the Standard Model from the unified Fundamental Composi te Higgs-Technicolor theory \cite{Cacciapaglia:2014uja} to models of composite dark matter. en dc.language.iso en en dc.subject hep-lat en dc.subject hep-lat en dc.title $SU(2)$ Gauge Theory with Two Fundamental Flavours: Scalar and Pseudoscalar Spectrum en dc.type Journal Article plymouth.author-url http://arxiv.org/abs/1607.06654v2 en plymouth.organisational-group /Plymouth plymouth.organisational-group /Plymouth/00 Groups by role plymouth.organisational-group /Plymouth/00 Groups by role/Academics plymouth.organisational-group /Plymouth/Faculty of Science and Engineering plymouth.organisational-group /Plymouth/Faculty of Science and Engineering/School of Computing, Electronics and Mathematics plymouth.organisational-group /Plymouth/REF 2021 Researchers by UoA plymouth.organisational-group /Plymouth/REF 2021 Researchers by UoA/UoA10 Mathematical Sciences dc.rights.embargoperiod Not known en rioxxterms.licenseref.uri http://www.rioxx.net/licenses/all-rights-reserved en rioxxterms.type Journal Article/Review en
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