Pasupathy, J. ; Singh, J. P. ; Singh, R. K. ; Upadhyay, A. (2006) The derivative of the topological susceptibility at zero momentum and an estimate of η′ mass in the chiral limit Physics Letters B, 634 (5-6). pp. 508-513. ISSN 0370-2693
Full text not available from this repository.
Official URL: http://www.sciencedirect.com/science/article/pii/S...
Related URL: http://dx.doi.org/10.1016/j.physletb.2006.02.002
Abstract
The anomaly-anomaly correlator is studied using QCD sum rules. Using the matrix elements of anomaly between vacuum and pseudoscalars π , η and η′, the derivative of correlator χ′ (0) is evaluated and found to be ≈ 1.82 × 10-3 GeV2. Assuming that χ′ (0) has no significant dependence on quark masses, the mass of η′ in the chiral limit is found to be ≈ 723 MeV. The same calculation also yields for the singlet pseudoscalar decay constant in the chiral limit a value of ≈ 178 MeV.
| Item Type: | Article |
|---|---|
| Source: | Copyright of this article belongs to Elsevier Science. |
| ID Code: | 58085 |
| Deposited On: | 31 Aug 2011 12:40 |
| Last Modified: | 31 Aug 2011 12:40 |
Repository Staff Only: item control page
