期刊
PHYSICAL REVIEW D
卷 83, 期 9, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevD.83.094505
关键词
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资金
- DFG [Sonderforschungsbereich / Transregio SFB/TR-9, Mu 757/13]
- Japanese Ministry of Education [21674002]
- Jefferson Science Associates, LLC under U.S. DOE [DE-AC05-06OR23177]
- Grants-in-Aid for Scientific Research [21674002] Funding Source: KAKEN
We perform a nonperturbative lattice calculation of the P-wave pion-pion scattering phase in the rho-meson decay channel using two flavors of maximally twisted mass fermions at pion masses ranging from 480 to 290 MeV. Making use of finite-size methods, we evaluate the pion-pion scattering phase in the center-of-mass frame and two moving frames. Applying an effective range formula, we find a good description of our results for the scattering phase as a function of the energy covering the resonance region. This allows us to extract the rho-meson mass and decay width and to study their quark mass dependence.
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