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- W3149138767 abstract "Phase shifts for $s$-wave $pipi$ scattering in both the $I=0$ and $I=2$ channels are determined from a lattice QCD calculation performed on 741 gauge configurations obeying G-parity boundary conditions with a physical pion mass and lattice size of $32^3times 64$. These results support our recent study of direct CP violation in $Ktopipi$ decay cite{Abbott:2020hxn}, improving our earlier 2015 calculation cite{Bai:2015nea}. The phase shifts are determined for both stationary and moving $pipi$ systems, at three ($I=0$) and four ($I=2$) different total momenta. We implement several $pipi$ interpolating operators including a scalar bilinear $sigma$ operator and paired single-pion bilinear operators with the constituent pions carrying various relative momenta. Several techniques, including correlated fitting and a bootstrap determination of p-values have been used to refine the results and a comparison with the generalized eigenvalue problem (GEVP) method is given. A detailed systematic error analysis is performed which allows phase shift results to be presented at a fixed energy." @default.
- W3149138767 created "2021-04-13" @default.
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- W3149138767 date "2021-03-28" @default.
- W3149138767 modified "2023-09-27" @default.
- W3149138767 title "arXiv : Lattice determination of $I= 0$ and 2 $pipi$ scattering phase shifts with a physical pion mass" @default.
- W3149138767 hasPublicationYear "2021" @default.
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