Sum rule analysis of vector and axial-vector spectral functions with excited states in vacuum
| Pub type: | Article |
| Citation: | Hohler201258 |
| Status: | Published |
| Journal: | Nuclear Physics A |
| Volume: | 892 |
| Year: | 2012 |
| Month: | October |
| Pages: | 58 - 72 |
| ISSN: | 0375-9474 |
| URL: | http://www.sciencedirect.com/s... |
| DOI: | 10.1016/j.nuclphysa.2012.08.003 |
| Abstract: | We simultaneously analyze vector and axial-vector spectral functions in vacuum using hadronic models constrained by experimental data and the requirement that Weinberg-type sum rules are satisfied. Upon explicit inclusion of an excited vector state, viz. ρ ′ , and the requirement that the perturbative continua are degenerate in vector and axial-vector channels, we deduce the existence of an excited axial-vector resonance state, a 1 ′ , in order that the Weinberg sum rules are satisfied. The resulting spectral functions are further tested with \{QCD\} sum rules. |
| Month_val: | 10 |
| Sig contrib: | R. Rapp |
| Keywords: | Axial-vector mesons, Sum rules, Vector mesons |
| Authors: | |
| Added by: | [DGM] |
| Total mark: | 0 |
| | |
|
Notes
|
|
|
|
|
|
Topics
|
|
|
|
