2024-03-28T16:58:04Z
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oai:tsukuba.repo.nii.ac.jp:00007774
2022-08-01T00:53:06Z
2871:2873:125
29:110
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I=2ππ scattering phase shift with two flavors of O(a) improved dynamical quarks
Yamazaki, T.
Aoki, S.
Fukugit, M.
Ishikawa, K-I.
Ishizuka, N.
Iwasaki, Y.
岩崎, 洋一
Kanaya, K.
Kaneko, T.
Kuramashi, Y.
Okawa, M.
Ukawa, A.
宇川, 彰
Yoshie, T.
We present a lattice QCD calculation of phase shift including the chiral and continuum extrapolations in two-flavor QCD. The calculation is carried out for I=2 S-wave pipi scattering. The phase shift is evaluated for two momentum systems, the center of mass and laboratory systems, by using the finite-volume method proposed by Luscher in the center of mass system and its extension to general systems by Rummukainen and Gottlieb. The measurements are made at three different bare couplings beta=1.80, 1.95 and 2.10 using a renormalization group improved gauge and a tadpole improved clover fermion action, and employing a set of configurations generated for hadron spectroscopy in our previous work. The illustrative values we obtain for the phase shift in the continuum limit are δ(deg.)=-3.50(64), -9.5(30) and -16.9(64) for √s(GeV)=0.4, 0.6 and 0.8, which are consistent with experiments.
journal article
American Physical Society
2004-10
application/pdf
Physical review D
7
70
074513
http://hdl.handle.net/2241/89317
2470-0010
AA00773624
https://tsukuba.repo.nii.ac.jp/record/7774/files/PRD_70-7.pdf
eng
https://doi.org/10.1103/PhysRevD.70.074513
(c) 2004 The American Physical Society
open access