$B_c$ decays from highly improved staggered quarks and NRQCD
dc.contributor.author | Colquhoun, B | |
dc.contributor.author | Davies, C | |
dc.contributor.author | Koponen, J | |
dc.contributor.author | Lytle, A | |
dc.contributor.author | McNeile, C | |
dc.date.accessioned | 2018-03-07T09:13:07Z | |
dc.date.available | 2018-03-07T09:13:07Z | |
dc.date.issued | 2016-11-07 | |
dc.identifier.uri | http://hdl.handle.net/10026.1/11001 | |
dc.description | 6 pages, 5 figures. Talk presented at the 34th annual International Symposium on Lattice Field Theory, 24-30 July 2016, University of Southampton, UK | |
dc.description.abstract |
We calculate semileptonic form factors for the decays $B_c \to \eta_c \, l \nu$ and $B_c \to J/\psi \, l \nu$ over the entire $q^2$ range, using a highly improved lattice quark action for charm at several lattice spacings down to $a=0.045$ fm. We have two ways of treating the $b$ quark: either with an $O(\alpha_s)$ improved NRQCD formalism or by extrapolating a heavy mass $m_h$ to $m_b$ in the relativistic formalism. Comparison of the two approaches provides an important cross-check of methodologies in lattice QCD. Nonperturbative renormalisation of the currents in the relativistic theory also allows us then to fix NRQCD-charm normalisation for $b$ to $c$ decays such as $B \to D$ and $B \to D^*$. | |
dc.language.iso | en | |
dc.subject | hep-lat | |
dc.subject | hep-lat | |
dc.subject | hep-ph | |
dc.title | $B_c$ decays from highly improved staggered quarks and NRQCD | |
dc.type | conference | |
plymouth.author-url | http://arxiv.org/abs/1611.01987v1 | |
plymouth.conference-name | 34th annual International Symposium on Lattice Field Theory | |
plymouth.organisational-group | /Plymouth | |
plymouth.organisational-group | /Plymouth/Faculty of Science and Engineering | |
plymouth.organisational-group | /Plymouth/REF 2021 Researchers by UoA | |
plymouth.organisational-group | /Plymouth/REF 2021 Researchers by UoA/EXTENDED UoA 10 - Mathematical Sciences | |
plymouth.organisational-group | /Plymouth/REF 2021 Researchers by UoA/UoA10 Mathematical Sciences | |
plymouth.organisational-group | /Plymouth/Users by role | |
plymouth.organisational-group | /Plymouth/Users by role/Academics | |
plymouth.organisational-group | /Plymouth/Users by role/Researchers in ResearchFish submission | |
dcterms.dateAccepted | 2016-07-24 | |
dc.rights.embargoperiod | Not known | |
rioxxterms.licenseref.uri | http://www.rioxx.net/licenses/all-rights-reserved | |
rioxxterms.licenseref.startdate | 2016-11-07 | |
rioxxterms.type | Conference Paper/Proceeding/Abstract |