Neutral B Meson Mixing in Unquenched Lattice QCD TeX Export

@article{citeulike:4074955, abstract = {We study \$B\_d\$ and \$B\_s\$ mixing in unquenched lattice QCD employing the MILC collaboration gauge configurations that include u, d, and s sea quarks based on the improved staggered quark (AsqTad) action and a highly improved gluon action. We implement the valence light quarks also with the AsqTad action and use the nonrelativistic NRQCD action for the valence b quark. We calculate hadronic matrix elements necessary for extracting CKM matrix elements from experimental measurements of mass differences \$\Delta M\_d\$ and \$\Delta M\_s\$. We find \$\xi = f\_{B\_s} \sqrt{\hat{B}\_{B\_s}} / f\_{B\_d} \sqrt{\hat{B}\_{B\_d}} = 1.258(33)\$, \$f\_{B\_d} \sqrt{\hat{B}\_{B\_d}} = 216(15)\$ MeV and \$f\_{B\_s} \sqrt{\hat{B}\_{B\_s}} = 266(18)\$ MeV. We also update previous results for decay constants and obtain \$f\_{B\_d} = 190(13)\$ MeV, \$f\_{B\_s} = 231(15)\$ MeV and \$f\_{B\_s}/f\_{B\_d} = 1.226(26)\$.}, archivePrefix = {arXiv}, author = {G\&\#xe1;miz, Elvira and Davies, Christine T. H. and Lepage, Peter G. and Shigemitsu, Junko and Wingate, Matthew}, citeulike-article-id = {4074955}, citeulike-linkout-0 = {http://arxiv.org/abs/0902.1815}, citeulike-linkout-1 = {http://arxiv.org/pdf/0902.1815}, day = {18}, eprint = {0902.1815}, keywords = {precision-test}, month = {Feb}, posted-at = {2009-02-20 15:43:34}, priority = {2}, title = {Neutral B Meson Mixing in Unquenched Lattice QCD}, url = {http://arxiv.org/abs/0902.1815}, year = {2009} }

TY - JOUR ID - citeulike:4074955 L3 - citeulike-article-id:4074955 N2 - We study $B_d$ and $B_s$ mixing in unquenched lattice QCD employing the MILC collaboration gauge configurations that include u, d, and s sea quarks based on the improved staggered quark (AsqTad) action and a highly improved gluon action. We implement the valence light quarks also with the AsqTad action and use the nonrelativistic NRQCD action for the valence b quark. We calculate hadronic matrix elements necessary for extracting CKM matrix elements from experimental measurements of mass differences $\Delta M_d$ and $\Delta M_s$. We find $\xi = f_{B_s} \sqrt{\hat{B}_{B_s}} / f_{B_d} \sqrt{\hat{B}_{B_d}} = 1.258(33)$, $f_{B_d} \sqrt{\hat{B}_{B_d}} = 216(15)$ MeV and $f_{B_s} \sqrt{\hat{B}_{B_s}} = 266(18)$ MeV. We also update previous results for decay constants and obtain $f_{B_d} = 190(13)$ MeV, $f_{B_s} = 231(15)$ MeV and $f_{B_s}/f_{B_d} = 1.226(26)$. TI - Neutral B Meson Mixing in Unquenched Lattice QCD KW - precision-test AU - Gámiz, Elvira AU - Davies, Christine AU - Lepage, Peter AU - Shigemitsu, Junko AU - Wingate, Matthew PY - 2009/Feb/18/ UR - http://arxiv.org/abs/0902.1815 ER -