Chiral symmetry and - scattering in the Covariant Spectator Theory
- Univ. de Lisboa, Lisboa (Portugal)
- Univ. de Lisboa, Lisboa (Portugal); Univ. de Evora, Evora (Portugal)
- Thomas Jefferson National Accelerator Facility (TJNAF), Newport News, VA (United States)
The π-π scattering amplitude calculated with a model for the quark-antiquark interaction in the framework of the Covariant Spectator Theory (CST) is shown to satisfy the Adler zero constraint imposed by chiral symmetry. The CST formalism is established in Minkowski space and our calculations are performed in momentum space. We prove that the axial-vector Ward-Takahashi identity is satisfied by our model. Then we show that, similarly to what happens within the Bethe-Salpeter formalism, application of the axial-vector Ward Takahashi identity to the CST π-π scattering amplitude allows us to sum the intermediate quark-quark interactions to all orders. Thus, the Adler self-consistency zero for π-π scattering in the chiral limit emerges as the result for this sum.
- Research Organization:
- Thomas Jefferson National Accelerator Facility (TJNAF), Newport News, VA (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC), Nuclear Physics (NP)
- Grant/Contract Number:
- AC05-06OR23177; PTDC/FIS/113940/2009; CFTP-FCT; 283286
- OSTI ID:
- 1163888
- Report Number(s):
- JLAB-THY-14-1933; arXiv:1408.1625; DOE/OR/23177-3151; PRVDAQ; ArticleNumber: 096008; TRN: US1600833
- Journal Information:
- Physical Review. D, Particles, Fields, Gravitation and Cosmology, Vol. 90, Issue 9; ISSN 1550-7998
- Publisher:
- American Physical Society (APS)Copyright Statement
- Country of Publication:
- United States
- Language:
- English
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