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nonperturbative QCD simulations with 2 + 1 flavors of improved staggered quarks
| Content Provider | Semantic Scholar |
|---|---|
| Author | Bazavov, Alexei Toussaint, Doug Laiho, J. A. DeTar, Carleton Levkova, Ludmila |
| Copyright Year | 2009 |
| Abstract | For several years the MILC collaboration has carried out non perturbative simulations of full QCD with two degenerate flavors of light quarks, up and do wn, and with one heavier flavor, the strange quark. Several light quark masses, down t about three times the physical light quark mass, and several lattice spacings have been use d. Th se allow for controlled continuum and chiral extrapolations of many low energy QCD o bservables. Use of an improved staggered quark formalism, “asqtad” fermions, ha been crucial in achieving this goal. Here we review the improved staggered formalism, emph asizing both advantages and drawbacks. In particular, we review the procedure, know n as the “fourth root trick” for removing unwanted staggered species in the continuum li mit. We then describe the lattice ensembles created so far, and the physics results ob tained on them. These include the heavy quark potential, spectrum of light hadrons, quark masses, decay constants of light and heavy-light pseudoscalar mesons, semileptonic f rm actors, computation of the strong coupling constant, spectroscopy of quarkonia, neut ral meson mixing, and more. We illustrate the impact of some of these results on the determi nation of CKM matrix elements. All MILC lattice ensembles are publicly available. Some of t he results mentioned were obtained by other groups using these MILC ensembles, some we re obtained by MILC in collaboration with other groups, and some by the MILC collab oration alone. PACS numbers: 12.38.Gc, 11.15.Ha |
| File Format | PDF HTM / HTML |
| Alternate Webpage(s) | http://www.physics.wustl.edu/~cb/0903.3598v2.pdf |
| Alternate Webpage(s) | http://www.physics.wustl.edu/~cb/RevModPhys.82.1349.pdf |
| Alternate Webpage(s) | http://www.physics.wustl.edu/~cb/0903.3598v1.pdf |
| Alternate Webpage(s) | http://physics.wustl.edu/~cb/RevModPhys.82.1349.pdf |
| Language | English |
| Access Restriction | Open |
| Subject Keyword | Abnormal degeneration Algorithm Anchor modeling Apache Continuum Artifact (error) Chirality (chemistry) Computation Computation (action) Control theory Coupling constant Experiment Extrapolation Flavoring Float Formal system Glossy display HL7PublishingSubSection |
| Content Type | Text |
| Resource Type | Article |
