Recent Developments in Chiral Unitary Theory and Triangle Singularities Involving Baryons

Recent Developments in Chiral Unitary Theory and Triangle Singularities Involving Baryons We report on several reactions involving baryons that develop triangle singularities. The combination of elements of chiral unitary theory with the triangle mechanisms explain different features of reactions and shed light on some decay modes of several resonances. We address the role of a triangle singularity in the $$\pi N(1535)$$ π N ( 1535 ) contribution to $$\gamma p \rightarrow p \pi ^0 \eta $$ γ p → p π 0 η , another singularity, producing a peak in the $$\gamma p\rightarrow K^+ \varLambda (1405)$$ γ p → K + Λ ( 1405 ) reaction which was previously unexplained, the role of a singularity in the $$\pi \varDelta $$ π Δ decay of the N(1700), and also discuss the $$N^*(1875)$$ N ∗ ( 1875 ) resonance from this perspective. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Few-Body Systems Springer Journals

Recent Developments in Chiral Unitary Theory and Triangle Singularities Involving Baryons

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Publisher
Springer Vienna
Copyright
Copyright © 2018 by Springer-Verlag GmbH Austria, part of Springer Nature
Subject
Physics; Particle and Nuclear Physics; Nuclear Physics, Heavy Ions, Hadrons; Atomic, Molecular, Optical and Plasma Physics
ISSN
0177-7963
eISSN
1432-5411
D.O.I.
10.1007/s00601-018-1407-6
Publisher site
See Article on Publisher Site

Abstract

We report on several reactions involving baryons that develop triangle singularities. The combination of elements of chiral unitary theory with the triangle mechanisms explain different features of reactions and shed light on some decay modes of several resonances. We address the role of a triangle singularity in the $$\pi N(1535)$$ π N ( 1535 ) contribution to $$\gamma p \rightarrow p \pi ^0 \eta $$ γ p → p π 0 η , another singularity, producing a peak in the $$\gamma p\rightarrow K^+ \varLambda (1405)$$ γ p → K + Λ ( 1405 ) reaction which was previously unexplained, the role of a singularity in the $$\pi \varDelta $$ π Δ decay of the N(1700), and also discuss the $$N^*(1875)$$ N ∗ ( 1875 ) resonance from this perspective.

Journal

Few-Body SystemsSpringer Journals

Published: May 29, 2018

References

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