New evaluation of the πNΣ term -: art. no. 065201

被引：27
|
作者：
Hite, GE [1 ]
Kaufmann, WB
Jacob, RJ
机构：
[1] Texas A&M Univ, Galveston, TX 77553 USA
[2] Arizona State Univ, Tempe, AZ 85287 USA
来源：
PHYSICAL REVIEW C | 2005年 / 71卷 / 06期
关键词：
D O I：
10.1103/PhysRevC.71.065201
中图分类号：
O57 [原子核物理学、高能物理学];
学科分类号：
070202 ;
摘要：
A new evaluation of the pi N Sigma term is presented that incorporates recent s-channel phase shifts and t-channel pi pi phase shifts. We also introduce analyticity-based extrapolation techniques that, along with standard dispersion relation methods, produce a more reliable extrapolation to the Cheng-Dashen point. A recent George Washington University (GWU) phase-shift analysis leads to a Sigma term of 81 +/- 6 MeV.
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页数：8
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