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Publication Information
Title What is the right formalism to search for resonances?
Abstract Hadron decay chains constitute one of the main sources of information on the QCD spectrum. We discuss the differences between the several partial wave analysis formalisms used in the literature to build the amplitudes. We match the helicity amplitudes to the covariant tensor basis. Hereby, we pay attention to the analytical properties of the amplitudes and separate singularities of kinematical and dynamical nature. We study the analytical properties of the spin-orbit (LS) formalism, and some of the covariant tensor approaches. In particular, we explicitly build the amplitudes for the B -> psi pi K and B -> Dbar pi pi decays, and show that the energy dependence of the covariant approach is model dependent. We also show that the usual recursive construction of covariant tensors explicitly violates crossing symmetry, which would lead to different resonance parameters extracted from scattering and decay processes.
Author(s) Mikhail Mikhasenko, Alessandro Pilloni, Jannes Nys, Miguel Albaladejo, Cesar FERNANDEZ RAMIREZ, Andrew Jackura, Vincent Mathieu, N. Sherrill, Tomasz Skwarnicki, Adam Szczepaniak
Publication Date March 2018
Document Type Journal Article
Primary Institution Universitaet Bonn, Bonn, Germany
Affiliation Theory & Comp Physics / THEORY CENTER / THEORY CENTER
Funding Source Nuclear Physics (NP), NSF-PHY-1507572, NSF-PHY-1415459, NSF-PHY-1205019
Proprietary? No
This publication conveys Technical Science Results
Document Numbers
JLAB Number: JLAB-THY-17-2606 OSTI Number: 1432445
LANL Number: arXiv:1712.02815 Other Number: DOE/OR/23177-4279
Associated with an experiment No
Associated with EIC No
Supported by Jefferson Lab LDRD Funding No
Journal Article
Journal Name European Physical Journal C
Refereed Yes
Volume 78
Issue 3
Page(s) 229
Attachments/Datasets/DOI Link
Document(s)
10.1140_epjc_s10052-018-5670-y.pdf (Accepted Manuscript)
DOI Link
Dataset(s) (none)
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