Publications
Publication Information
| Title | Lattice QCD matrix elements for the B--B-bar width difference beyond leading order |
| Authors | Christine Davies, Judd Harrison, Peter Lepage, Christopher Monahan, J. Shigemitsu, Matthew Wingate |
| JLAB number | JLAB-THY-19-3052 |
| LANL number | (None) |
| Other number | INT-PUB-19-044, DOE/OR/23177-4778 |
| Document Type(s) | (Journal Article) |
| Associated with EIC: | No |
| Supported by Jefferson Lab LDRD Funding: | No |
| Funding Source: | Nuclear Physics (NP) |
| Other Funding: | Science and Technology Funding Council National Science Foundation |
|
Journal Compiled for Physical Review Letters Volume 124 Page(s) 082001 Refereed | |
| Publication Abstract: | Predicting the Bs 0 ? B?s 0 width difference ??s relies on the heavy quark expansion and on hadronic matrix elements of ?B = 2 operators. We present the first lattice QCD results for matrix elements of the dimension-7 operators R2,3 and their linear combinations, R?2,3 , using nonrelativistic QCD for the bottom quark and a highly improved staggered quark (HISQ) action for the strange quark. Computations use MILC ensembles of gauge field configuations with 2 + 1 + 1 flavors of sea quarks with the HISQ discretization, including lattices with physically light up/down quark masss. We discuss features unique to calculating matrix elements of these operators and analyze errors due to series truncation, discretization, and quark mass dependence. Finally we report the first Standard Model determination of ??s using lattice QCD results for all hadronic matrix elements through O(1/mb ). |
| Experiment Numbers: | other |
| Group: | THEORY CENTER |
| Document: | |
| DOI: | https://doi.org/10.1103/PhysRevLett.124.082001 |
| Accepted Manuscript: | PhysRevLett.124.082001.pdf |
| Supporting Documents: | |
| Supporting Datasets: | |