Jin, Xuemin ; Nielsen, Marina ; Pasupathy, J. (1993) Nucleon sigma term from QCD sum rule Physics Letters B, 314 (2). pp. 163-167. ISSN 0370-2693
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Official URL: http://www.sciencedirect.com/science/article/pii/0...
Related URL: http://dx.doi.org/10.1016/0370-2693(93)90443-L
Abstract
The sigma term or the matrix element of the isoscalar-scalar current between one-nucleon states at zero momentum transfer is calculated, from the nucleon current correlation function in an external scalar field using the QCD sum rule method. For the response function of the chiral condensate <|q¯q|0> , we use chiral perturbation theory. The value obtained for nucleon σ term is in qualitative agreement with the determination of Gasser, Leutwyler and Sainio from dispersion analysis.
| Item Type: | Article |
|---|---|
| Source: | Copyright of this article belongs to Elsevier Science. |
| ID Code: | 58088 |
| Deposited On: | 31 Aug 2011 12:39 |
| Last Modified: | 31 Aug 2011 12:39 |
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