Roper resonance and S-11 (1535) from lattice QCD
Mathur, N; Chen Y(陈莹); Chen, Y; Dong, SJ; Draper, T; Horvath, I; Lee, FX; Liu, KF; Zhang, JB
刊名PHYSICS LETTERS B
2005
卷号605期号:1-2页码:#REF!
学科分类Physics
DOI10.1016/j.physletb.2004.11.010
通讯作者Horvath, I (reprint author), Univ Kentucky, Dept Phys & Astron, Lexington, KY 40506 USA.
文章类型Article
英文摘要Using the constrained-curve fitting method and overlap fermions with the lowest pion mass at 180 MeV, we observe that the masses of the first positive and negative parity excited states of the nucleon tend to cross over as the quark masses are taken to the chiral limit. Both results at the physical pion mass agree with the experimental values of the Roper resonance (N1/2+(1440)) and S-11 (N1/2- (1535)). This is seen for the first time in a lattice QCD calculation. These results are obtained on a quenched Iwasaki 16(3) x 28 lattice with a = 0.2 fm. We also extract the ghost eta'N states (a quenched artifact) which are shown to decouple from the nucleon interpolation field above mpi similar to 300 MeV. From the quark mass dependence of these states in the chiral region, we conclude that spontaneously broken chiral symmetry dictates the dynamics of light quarks in the nucleon. (C) 2004 Elsevier B.V. All rights reserved.
类目[WOS]Physics, Multidisciplinary
收录类别SCI
WOS记录号WOS:000226217900017
引用统计
被引频次:84[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.ihep.ac.cn/handle/311005/226420
专题中国科学院高能物理研究所_理论物理室_期刊论文
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GB/T 7714
Mathur, N,Chen Y,Chen, Y,et al. Roper resonance and S-11 (1535) from lattice QCD[J]. PHYSICS LETTERS B,2005,605(1-2):#REF!.
APA Mathur, N.,陈莹.,Chen, Y.,Dong, SJ.,Draper, T.,...&Zhang, JB.(2005).Roper resonance and S-11 (1535) from lattice QCD.PHYSICS LETTERS B,605(1-2),#REF!.
MLA Mathur, N,et al."Roper resonance and S-11 (1535) from lattice QCD".PHYSICS LETTERS B 605.1-2(2005):#REF!.
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