Dowdall, R.J., Davies, C.T.H. , Hammant, T.C. and Horgan, R.R. (2012) Precise heavy-light meson masses and hyperfine splittings from lattice QCD including charm quarks in the sea. Physical Review D, 86(9), 094510. (doi: 10.1103/PhysRevD.86.094510)
Full text not currently available from Enlighten.
Abstract
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 nonrelativistic QCD for the b quark including O(αs) radiative corrections to many of the Wilson coefficients for the first time. The D mesons use the highly improved staggered quark action for both valence quarks on the same sea. We find MBs-MB=84(2) MeV, MBs=5.366(8) GeV, MBc=6.278(9) GeV, MDs=1.9697(33) GeV, and MDs-MD=101(3) MeV. Our results for the B meson hyperfine splittings are MB*-MB=50(3) MeV, MBs*-MBs=52(3) MeV, in good agreement with existing experimental results. This demonstrates that our perturbative improvement of the nonrelativistic QCD chromomagnetic coupling works for both heavyonium and heavy-light mesons. We predict MBc*-MBc=54(3) MeV. We also present first results for the radially excited Bc states as well as the orbitally excited scalar Bc0* and axial-vector Bc1 mesons.
Item Type: | Articles |
---|---|
Status: | Published |
Refereed: | Yes |
Glasgow Author(s) Enlighten ID: | Dowdall, Dr Rachel and Davies, Professor Christine |
Authors: | Dowdall, R.J., Davies, C.T.H., Hammant, T.C., and Horgan, R.R. |
College/School: | College of Science and Engineering > School of Physics and Astronomy |
Journal Name: | Physical Review D |
Publisher: | American Physical Society |
ISSN: | 1550-7998 |
Published Online: | 12 November 2012 |
University Staff: Request a correction | Enlighten Editors: Update this record