scholarly journals Two-pion exchange contributions to the nucleon-nucleon interaction in covariant baryon chiral perturbation theory

2020 ◽  
Vol 102 (5) ◽  
Author(s):  
Yang Xiao ◽  
Chun-Xuan Wang ◽  
Jun-Xu Lu ◽  
Li-Sheng Geng
Keyword(s):  
Perturbation Theory ◽  
Chiral Perturbation Theory ◽  
Nucleon Nucleon ◽  
Pion Exchange ◽  
Nucleon Interaction ◽  
Chiral Perturbation ◽  
Nucleon Nucleon Interaction

scholarly journals Two-Pion Exchange Nuclear Potential — Chiral Cancellations

1997 ◽  
Vol 06 (01) ◽  
pp. 83-88 ◽  
Author(s):  
J.-L. Ballot ◽  
M. R. Robilotta ◽  
C. A. da Rocha
Keyword(s):  
Chiral Symmetry ◽  
Nucleon Nucleon ◽  
Pion Exchange ◽  
Nuclear Potential ◽  
Nucleon Interaction ◽  
Nucleon Scattering ◽  
Pion Nucleon ◽  
Nucleon Nucleon Interaction

We show that chiral symmetry is responsible for large cancellations in the two-pion exchange nucleon-nucleon interaction, which are similar to those occurring in free pion-nucleon scattering.

scholarly journals One-Boson-Exchange Modes and Two- and Three-Pion Exchange in Nucleon-Nucleon Interaction. I

1969 ◽  
Vol 41 (1) ◽  
pp. 131-144 ◽  
Author(s):  
Susumu Furuichi ◽  
Tamotsu Ueda ◽  
Wataro Watari ◽  
Minoru Yonezawa
Keyword(s):  
Nucleon Nucleon ◽  
Pion Exchange ◽  
Nucleon Interaction ◽  
Boson Exchange ◽  
Nucleon Nucleon Interaction

scholarly journals ADVANCES IN A FIELD-THEORETIC UNDERSTANDING OF PION PRODUCTION IN NUCLEON–NUCLEON COLLISIONS

2007 ◽  
Vol 22 (02n03) ◽  
pp. 591-595 ◽  
Author(s):  
VADIM LENSKY ◽  
JOHANN HAIDENBAUER ◽  
CHRISTOPH HANHART ◽  
VADIM BARU ◽  
ALEXANDER KUDRYAVTSEV ◽  
...  
Keyword(s):  
Perturbation Theory ◽  
Cross Section ◽  
Chiral Perturbation Theory ◽  
Pion Production ◽  
Nucleon Nucleon ◽  
Leading Order ◽  
Production Amplitude ◽  
Chiral Perturbation ◽  
Phenomenological Studies ◽  
The Cross

We study the production amplitude for the reaction NN → NNπ up to next-to-leading order in chiral perturbation theory. We show that the irreducible chiral loops at this order exactly cancel those terms that arise from the off-shell parts of the πN rescattering vertex. This cancellation is required for formal consistency of the whole scheme. The net effect of the inclusion of all next-to-leading order loops is to enhance the leading rescattering amplitude by a factor of 4/3 compared to phenomenological studies, bringing its contribution to the cross section for pp → dπ+ close to the experimental value.

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