Compositeness of hadron resonances in chiral dynamics

2014 ◽  
Vol 23 (07) ◽  
pp. 1461003 ◽  
Author(s):  
Tetsuo Hyodo
Keyword(s):  
Renormalization Constant ◽  
Effective Range ◽  
S Wave ◽  
Independent Manner ◽  
Range Parameter ◽  
Model Independent ◽  
Threshold Resonances ◽  
Field Renormalization ◽  
Near Threshold ◽  
Hadronic States

Recent experimental observations of many unconventional hadronic states stimulate an interest in the structure of hadrons. While various internal configurations have been proposed, it is a subtle problem to identify the structure of hadron resonances in a model independent manner. Here we discuss the composite/elementary nature of hadrons using the field renormalization constant Z. In particular, we show that the magnitude of the effective range parameter re is related to the structure of s-wave near-threshold resonances.

scholarly journals UNIFIED DISPERSIVE APPROACH TO γ* → γππ AND γγ → ππ

2014 ◽  
Vol 35 ◽  
pp. 1460399
Author(s):  
B. MOUSSALLAM
Keyword(s):  
S Wave ◽  
Large N ◽  
Model Independent ◽  
Dispersive Approach

A representation of the amplitude γ*(q2) → γππ is proposed which combines large Nc chiral resonance Lagrangian modelling with general unitarity and analyticity properties. The amplitude is constrained from γγ scattering results and e+e− → γπ0π0 measurements by the CMD-2 and SND collaborations. As an application, the contribution of the ππ + γ states in the HVP contribution to the muon g - 2 are reconsidered, taking into account the effect of the strong S-wave ππ rescattering in a model independent way.

A constraint on the off-shell effective range parameter in p-p scattering

1975 ◽  
Vol 244 (2) ◽  
pp. 315-321 ◽  
Author(s):  
D.W.L. Sprung ◽  
M.K. Srivastava
Keyword(s):  
Effective Range ◽  
Range Parameter

scholarly journals A practical parametrisation of line shapes of near-threshold resonances

2016 ◽  
Vol 675 (2) ◽  
pp. 022016 ◽  
Author(s):  
C Hanhart ◽  
Yu S Kalashnikova ◽  
P Matuschek ◽  
R V Mizuk ◽  
A V Nefediev ◽  
...  
Keyword(s):  
Line Shapes ◽  
Threshold Resonances ◽  
Near Threshold

Phenomenology of near-threshold resonances

2017 ◽  
Vol 80 (5) ◽  
pp. 1006-1035 ◽  
Author(s):  
A. V. Nefediev
Keyword(s):  
Threshold Resonances ◽  
Near Threshold

Parametrizing the line shapes of near-threshold resonances

2017 ◽  
Vol 48 (6) ◽  
pp. 849-850
Author(s):  
Yu. S. Kalashnikova ◽  
R. V. Mizuk ◽  
A. V. Nefediev
Keyword(s):  
Line Shapes ◽  
Threshold Resonances ◽  
Near Threshold

Effective range parameter ins-wave pion nucleon scattering

1971 ◽  
Vol 242 (2) ◽  
pp. 167-178 ◽  
Author(s):  
P. Achuthan ◽  
G. E. Hite ◽  
G. H�hler
Keyword(s):  
Effective Range ◽  
Nucleon Scattering ◽  
Range Parameter ◽  
Pion Nucleon
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