Zobrazeno 1 - 10
of 176
pro vyhledávání: '"Horgan, R. R."'
Autor:
Dowdall, R. J., Davies, C. T. H., Horgan, R. R., Lepage, G. P., Monahan, C. J., Shigemitsu, J., Wingate, M.
Publikováno v:
Phys. Rev. D 100, 094508 (2019)
We calculate the bag parameters for neutral $B$-meson mixing in and beyond the Standard Model, in full four-flavour lattice QCD for the first time. We work on gluon field configurations that include the effect of $u$, $d$, $s$ and $c$ sea quarks with
Externí odkaz:
http://arxiv.org/abs/1907.01025
Publikováno v:
Proceedings of Science (LATTICE2014) 372
In this write-up we review and update our recent lattice QCD calculation of $B \to K^*$, $B_s \to \phi$, and $B_s \to K^*$ form factors [arXiv:1310.3722]. These unquenched calculations, performed in the low-recoil kinematic regime, provide a signific
Externí odkaz:
http://arxiv.org/abs/1501.00367
Autor:
Dowdall, R. J., Davies, C. T. H., Horgan, R. R., Lepage, G. P., Monahan, C. J., Shigemitsu, J.
We present the first lattice QCD calculation of the $B_s$ and $B_d$ mixing parameters with physical light quark masses. We use MILC gluon field configurations that include $u$, $d$, $s$ and $c$ sea quarks at 3 values of the lattice spacing and with 3
Externí odkaz:
http://arxiv.org/abs/1411.6989
Bottomonium hyperfine splittings from lattice NRQCD including radiative and relativistic corrections
Publikováno v:
Physical Review D89 031502(R) (2014)
We present a calculation of the hyperfine splittings in bottomonium using lattice Nonrelativistic QCD. The calculation includes spin-dependent relativistic corrections through O(v^6), radiative corrections to the leading spin-magnetic coupling and, f
Externí odkaz:
http://arxiv.org/abs/1309.5797
Autor:
Dowdall, R. J., Davies, C. T. H., Horgan, R. R., Lepage, G. P., McNeile, C., Monahan, C. J., Shigemitsu, J.
Calculations of pseudoscalar decay constants of B, Bs, K and pi mesons with physical light quarks are presented. We use HISQ ensembles that include u,d,s and c sea quarks at three lattice spacings. HISQ is used for the valence light quarks and a radi
Externí odkaz:
http://arxiv.org/abs/1309.4610
Publikováno v:
Phys.Rev. D88 (2013) 014505
We apply the background field (BF) method to Non-Relativistic QCD (NRQCD) on the lattice in order to determine the one-loop radiative corrections to the coefficients of the NRQCD action in a manifestly gauge-covariant manner by matching the NRQCD pre
Externí odkaz:
http://arxiv.org/abs/1303.3234
Publikováno v:
Phys. Rev. D 87, 074018 (2013)
We present a determination of the b-quark mass accurate through O(\alpha_s^2) in perturbation theory and including partial contributions at O(\alpha_s^3). Nonperturbative input comes from the calculation of the Upsilon and B_s energies in lattice QCD
Externí odkaz:
http://arxiv.org/abs/1302.3739
We present the first lattice QCD calculation of the decay constants f_B and f_{B_s} with physical light quark masses. We use configurations generated by the MILC collaboration including the effect of u, d, s and c HISQ sea quarks at three lattice spa
Externí odkaz:
http://arxiv.org/abs/1302.2644
Publikováno v:
PoS(Lattice 2012)154
We present updated results for the radiative improvement of the \sigma.B term and the spin-dependent four-fermion terms in the lattice NRQCD action, and first results for the radiative corrections to the NRQCD Darwin term and spin-independent four-fe
Externí odkaz:
http://arxiv.org/abs/1212.2849
We present improved results for the B and D meson spectrum from lattice QCD including the effect of u/d,s and c quarks in the sea. For the B mesons the Highly Improved Staggered Quark action is used for the sea and light valence quarks and NonRelativ
Externí odkaz:
http://arxiv.org/abs/1207.5149