STI Publications - View Publication Form #16042
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Publication Information
| Title | A cross-channel study of pion scattering from lattice QCD | ||||
| Abstract | We use a chiral model for pion interactions, in the inverse amplitude formalism, to perform a simultaneous analysis of lattice QCD results for pion-pion scattering in all three isospin channels. The input is the finite-volume two-pion spectrum computed using lattice QCD from six ensembles on lattices elongated in one of the spatial dimensions. A two-flavor dynamical lattice QCD action is used with two quark masses corresponding to a pion mass of 315 MeV and 224 MeV. The spectrum in the elastic region is subjected to a global fit which takes into account full correlations across isospin, pion mass and decay constant. The parameters from the fit are used to perform a chiral extrapolation to the physical point. The cross-channel fit results in a more precise determination of the parameters of the model when compared with single channel fits. We obtain $m_\pi a_0^{I=0}=0.2132(9)$, and $m_\pi a_0^{I=2}=0.0433(2)$ as well as $m_\sigma=443(3)-i221(6)$ MeV and $m_\rho=724(4)-i67(1)$ MeV. Sever | ||||
| Author(s) | Maxim Mai, C. Culver, Andrei Alexandru, Michael Doring, Frank Lee | ||||
| Publication Date | December 2019 | ||||
| Document Type | Journal Article | ||||
| Primary Institution | George Washington University, Washington, DC | ||||
| Affiliation | Theory & Comp Physics / THEORY CENTER / THEORY CENTER | ||||
| Funding Source | Nuclear Physics (NP) | ||||
| Proprietary? | No | ||||
| This publication conveys | Technical Science Results | ||||
| Document Numbers |
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| Associated with an experiment | No | ||||
| Associated with EIC | No | ||||
| Supported by Jefferson Lab LDRD Funding | No |
Journal Article
| Journal Name | Physical Review D |
| Refereed | Yes |
| Volume | 100 |
| Issue | |
| Page(s) | 114514 |
Attachments/Datasets/DOI Link
| Document(s) |
1908.01847.pdf
(STI Document)
PhysRevD.100.114514.pdf
(Accepted Manuscript)
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| DOI Link | |
| Dataset(s) | (none) |
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