Searching for observable effects induced by anomalous triangle singularities
@article{Liu2015SearchingFO, title={Searching for observable effects induced by anomalous triangle singularities}, author={Xiao-Hai Liu and Makoto Oka and Qiang Zhao}, journal={Physics Letters B}, year={2015}, volume={753}, pages={297-302} }
87 Citations
The role of anomalous triangle singularity in the understanding of the recently observed heavy pentaquark candidates Pc+(4380) and Pc+(4450)
- Physics
- 2016
We discuss that the kinematic effects from the anomalous triangle singularity (ATS) can contribute to the enhancements of the newly observed heavy pentaquark candidates Pc+(4380) and Pc+(4450) in Λb…
Understanding the nature of heavy pentaquarks and searching for them in pion-induced reactions
- Physics
- 2016
Peaks and cusps: anomalous thresholds and LHC physics
- Physics
- 2018
The behavior of scattering amplitudes in the vicinity of a physical-region Landau singularity is considered. The impact on LHC processes is discussed.
New Physics Opportunities in Triangle Singularity
- Physics
- 2022
We show that loop-induced processes involving new physics particles can readily satisfy Landau Equation and trigger triangular singularities at high energy colliders, leading to fully visible…
Nonperturbative Anomalous Thresholds
- Physics
- 2022
Feynman diagrams (notably the triangle diagram) involving heavy enough particles contain branch cuts on the physical sheet - anomalous thresholds - which, unlike normal thresholds and bound-state…
Could the observation of X(5568) be a result of the near threshold rescattering effects?
- Physics, Mathematics
- 2016
We investigate the invariant mass distributions of $$B_s\pi $$Bsπ via different rescattering processes. The triangle singularity which appears in the rescattering amplitude may simulate the…
Triangle singularity enhancing isospin violation in and decays
- Physics
- 2019
We investigate isospin violation in the and reactions, which proceed via a triangle mechanism. We show that the mechanism develops a singularity around the π 0 f 0 (980) or π 0 a0 (980) invariant…
Exploring Possible Triangle Singularities in the Ξ b - → K - J / ψ Λ Decay
- PhysicsSymmetry
- 2020
It is suggested that although the whole strength is unknown, the contributions from the Ξ*-charmonium-Λ triangle diagram should be paid attention to if structures are observed in the J/ψΛ invariant mass spectrum experimentally.
Internal particle width effects on the triangle singularity mechanism in the study of the η(1405) and η(1475) puzzle
- PhysicsPhysical Review D
- 2019
In this article, the analyticity of triangle loop integral with complex masses of internal particles is discussed in a new perspective, base on which we obtain the explicit width dependence of the…
How to reveal the exotic nature of the P c (4450)
- Physics
- 2015
The LHCb Collaboration announced two pentaquark-like structures in the J/ψp invariant mass distribution. We show that the current information on the narrow structure at 4.45 GeV is compatible with…
References
SHOWING 1-10 OF 45 REFERENCES
SOME EXPERIMENTAL CONSEQUENCES OF TRIANGLE SINGULARITIES IN PRODUCTION PROCESSES
- Mathematics
- 1962
The infinite anomalous threshold singularities in the amplitude for a production reaction may, in certain circumstances, lie close to the physical region. The possibility then arises that they can be…
Rescattering effects and the Schmid theorem
- Mathematics
- 1983
We point out here the importance of the 1967 paper by Christoph Schmid in clarifying recent studies concerning the existence (or nonexistence) of peaks in three-body hadron systems. We further point…
Could the near-threshold $XYZ$ states be simply kinematic effects?
- Physics
- 2015
We demonstrate that the spectacular structures discovered recently in various experiments and named as X, Y and Z states cannot be purely kinematic effects. Their existence necessarily calls for…
Final-State Interactions and the Simulation of Resonances
- Physics
- 1967
It is shown that the singularities of the triangle or rescattering diagram cannot produce peaks in the total transition rate. Rescattering bands can be seen on the Dalitz plot, but their projections…
Some analytic properties of a decay amplitude with final state interactions
- Physics
- 1961
SummaryThe simplest vertex-type diagrams for K → 3π decay contain an internal double pion line: when the total rest-mass parameter λ of this line is taken as discrete, the amplitude possesses on the…
Possible Mechanism for the Pion-Nucleon Second Resonance
- Physics
- 1961
The second, third, and higher resonances of the pi -N system are studied. A model is proposed in which the 33 pi N isobar is considered as an unstable particle with complex mass, designated as N*.…
Singularities and Discontinuities of Feynman Amplitudes
- Physics, Mathematics
- 1960
The Landau singularities of the amplitude calculated from an arbitrary Feynman graph are considered. It is shown that the discontinuity across a branch cut starting from any Landau singularity is…