I=2pipi scattering phase shift with two flavors of O(a) improved dynamical quarks
Physical Review D Volume 70
Page 074513-
published_at 2004
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Title ( eng ) |
I=2pipi scattering phase shift with two flavors of O(a) improved dynamical quarks
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Creator |
CP-PACS Collaboration
Yamazaki T
Aoki S
Fukugita M
Ishizuka N
Iwasaki Y
Kanaya K
Kaneko T
Kuramashi Y
Ukawa A
Yoshié T
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Source Title |
Physical Review D
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Volume | 70 |
Start Page | 074513 |
Abstract |
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 Lüscher 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 delta(deg.)=-3.50(64), -9.5(30) and -16.9(64) for sqrt(s)(GeV)=0.4, 0.6 and 0.8, which are consistent with experiments.
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NDC |
Physics [ 420 ]
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Language |
eng
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Resource Type | journal article |
Publisher |
The American Physical Society
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Date of Issued | 2004 |
Rights |
Copyright (c) 2004 The American Physical Society
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Publish Type | Author’s Original |
Access Rights | open access |
Source Identifier |
[ISSN] 1550-7998
[DOI] http://dx.doi.org/10.1103/PhysRevD.70.074513
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