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http://hdl.handle.net/2445/131771
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DC Field | Value | Language |
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dc.contributor.author | Beane, Silas R. | - |
dc.contributor.author | Detmold, William | - |
dc.contributor.author | Junnarkar, P. M. | - |
dc.contributor.author | Luu, Thomas C. | - |
dc.contributor.author | Orginos, Kostas | - |
dc.contributor.author | Parreño García, Assumpta | - |
dc.contributor.author | Savage, Martin J. | - |
dc.contributor.author | Torok, Aaron | - |
dc.contributor.author | Walker-Loud, André | - |
dc.contributor.author | NPLQCD Collaboration | - |
dc.date.accessioned | 2019-04-08T11:19:19Z | - |
dc.date.available | 2019-04-08T11:19:19Z | - |
dc.date.issued | 2012-11-01 | - |
dc.identifier.issn | 1550-7998 | - |
dc.identifier.uri | http://hdl.handle.net/2445/131771 | - |
dc.description.abstract | An analysis of the pion mass and pion decay constant is performed using mixed-action lattice QCD calculations with domain-wall valence quarks on ensembles of rooted, staggered n f = 2 + 1 configurations generated by the MILC Collaboration. Calculations were performed at two lattice spacings of b ≈ 0.125 fm and b ≈ 0.09 fm , at two strange quark masses, multiple light quark masses, and a number of lattice volumes. The ratios of light quark to strange quark masses are in the range 0.1 ≤ m l / m s ≤ 0.6 , while pion masses are in the range 235 ≲ m π ≲ 680 MeV . A two-flavor chiral perturbation theory analysis of the lattice QCD calculations constrains the Gasser-Leutwyler coefficients ¯ l 3 and ¯ l 4 to be ¯ l 3 = 4.04 ( 40 ) ( 73 55 ) and ¯ l 4 = 4.30 ( 51 ) ( 84 60 ) . All systematic effects in the calculations are explored, including those from the finite lattice space-time volume, the finite lattice spacing, and the finite fifth dimension in the domain-wall quark action. A consistency is demonstrated between a chiral perturbation theory analysis at fixed lattice spacing combined with a leading order continuum extrapolation, and the mixed-action chiral perturbation theory analysis which explicitly includes the leading order discretization effects. Chiral corrections to the pion decay constant are found to give f π / f = 1.062 ( 26 ) ( 42 40 ) where f is the decay constant in the chiral limit, and when combined with the experimental determination of f π results in a value of f = 122.8 ( 3.0 ) ( 4.6 4.8 ) MeV . The most recent scale setting by the MILC Collaboration yields a postdiction of f π = 128.2 ( 3.6 ) ( 4.4 6.0 ) ( 1.2 3.3 ) MeV at the physical pion mass. A detailed error analysis indicates that precise calculations at lighter pion masses is the single most important systematic to address to improve upon the present work. | - |
dc.format.extent | 20 p. | - |
dc.format.mimetype | application/pdf | - |
dc.language.iso | eng | - |
dc.publisher | American Physical Society | - |
dc.relation.isformatof | Reproducció del document publicat a: https://doi.org/10.1103/PhysRevD.86.094509 | - |
dc.relation.ispartof | Physical Review D, 2012, vol. 86, p. 094509 | - |
dc.relation.uri | https://doi.org/10.1103/PhysRevD.86.094509 | - |
dc.rights | (c) American Physical Society, 2012 | - |
dc.source | Articles publicats en revistes (Física Quàntica i Astrofísica) | - |
dc.subject.classification | Física de partícules | - |
dc.subject.classification | Experiments | - |
dc.subject.other | Particle physics | - |
dc.subject.other | Experiments | - |
dc.title | SU(2) Low-Energy Constants from Mixed-Action Lattice QCD | - |
dc.type | info:eu-repo/semantics/article | - |
dc.type | info:eu-repo/semantics/publishedVersion | - |
dc.identifier.idgrec | 606132 | - |
dc.date.updated | 2019-04-08T11:19:20Z | - |
dc.rights.accessRights | info:eu-repo/semantics/openAccess | - |
Appears in Collections: | Articles publicats en revistes (Física Quàntica i Astrofísica) |
Files in This Item:
File | Description | Size | Format | |
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606132.pdf | 1.25 MB | Adobe PDF | View/Open |
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