Zobrazeno 1 - 10
of 141
pro vyhledávání: '"Shigemitsu Junko"'
Autor:
Davies Christine, Harrison Judd, Lepage G Peter, Monahan Christopher, Shigemitsu Junko, Wingate Matthew
Publikováno v:
EPJ Web of Conferences, Vol 175, p 13023 (2018)
We present lattice QCD results for the matrix elements of R2 and other dimension-7, ΔB = 2 operators relevant for calculations of Δs, the Bs - B̅s width difference. We have computed correlation functions using 5 ensembles of the MILC Collaboration
Externí odkaz:
https://doaj.org/article/201d3548c54c47ed945206896d8b4f44
Autor:
Davies, Christine T. H., Harrison, Judd, Lepage, G. Peter, Monahan, Christopher J., Shigemitsu, Junko, Wingate, Matthew
Publikováno v:
Phys. Rev. Lett. 124, 082001 (2020)
Predicting the $B_s^0-\bar{B}_s^0$ width difference $\Delta\Gamma_s$ relies on the heavy quark expansion and on hadronic matrix elements of $\Delta B=2$ operators. We present the first lattice QCD results for matrix elements of the dimension-7 operat
Externí odkaz:
http://arxiv.org/abs/1910.00970
Autor:
Monahan, Christopher J., Bouchard, Chris M., Lepage, G. Peter, Na, Heechang, Shigemitsu, Junko
Publikováno v:
Phys. Rev. D 98, 114509 (2018)
We present a lattice quantum chromodynamics determination of the ratio of the scalar and vector form factors for two semileptonic decays of the $B_s$ meson: $B_s \rightarrow K \ell \nu$ and $B_s \rightarrow D_s \ell \nu$. In conjunction with future e
Externí odkaz:
http://arxiv.org/abs/1808.09285
Autor:
Davies, Christine, Harrison, Judd, Lepage, G Peter, Monahan, Christopher, Shigemitsu, Junko, Wingate, Matthew
Publikováno v:
EPJ Web of Conferences 175, 13023 (2018)
We present lattice QCD results for the matrix elements of $R_2$ and other dimension-7, $\Delta B = 2$ operators relevant for calculations of $\Delta \Gamma_s$, the $B_s-\bar{B}_s$ width difference. We have computed correlation functions using 5 ensem
Externí odkaz:
http://arxiv.org/abs/1712.09934
Publikováno v:
Phys. Rev. D 95, 114506 (2017)
We present a lattice quantum chromodynamics determination of the scalar and vector form factors for the $B_s \rightarrow D_s \ell \nu$ decay over the full physical range of momentum transfer. In conjunction with future experimental data, our results
Externí odkaz:
http://arxiv.org/abs/1703.09728
Autor:
Monahan, Christopher J., Na, Heechang, Bouchard, Chris M., Lepage, G. Peter, Shigemitsu, Junko
We present a calculation of the form factors, $f_0$ and $f_+$, for the $B_{(s)} \to D_{(s)}$ semileptonic decays. Our work uses the MILC $n_f=2+1$ AsqTad configurations with NRQCD and HISQ valence quarks at four values of the momentum transfer $q^2$.
Externí odkaz:
http://arxiv.org/abs/1611.09667
Publikováno v:
Phys. Rev. D 92, 054510 (2015)
We present a lattice QCD calculation of the $B \rightarrow D l \nu$ semileptonic decay form factors $f_+(q^2)$ and $f_0(q^2)$ for the entire physical $q^2$ range. Non-relativistic QCD (NRQCD) bottom quarks and Highly Improved Staggered Quark (HISQ) c
Externí odkaz:
http://arxiv.org/abs/1505.03925
Publikováno v:
Phys. Rev. D 90, 054015 (2014)
We match continuum and lattice heavy-light four-fermion operators at one loop in perturbation theory. For the heavy quarks we use nonrelativistic QCD and for the massless light quarks the highly improved staggered quark action. We include the full se
Externí odkaz:
http://arxiv.org/abs/1407.4040
Publikováno v:
Phys. Rev. D 90, 054506 (2014)
We report the first lattice QCD calculation of the form factors for the standard model tree-level decay $B_s\to K \ell\nu$. In combination with future measurement, this calculation will provide an alternative exclusive semileptonic determination of $
Externí odkaz:
http://arxiv.org/abs/1406.2279
We discuss our ongoing effort to calculate form factors for several B and Bs semileptonic decays. We have recently completed the first unquenched calculation of the form factors for the rare decay B -> K ll. Extrapolated over the full kinematic range
Externí odkaz:
http://arxiv.org/abs/1310.3207