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Publication Information
Title $\eta'-\pi$ production and search for exotic mesons at COMPASS and JLab12
Abstract In the exclusive production of $\eta\pi$ and $\eta'-\pi$ pairs with a 191 GeV/c pion beam at COMPASS resonance-like enhancement in the P-wave was observed. Such a resonance would carry exotic quantum numbers therefore, cannot be associated with the conventional quark-antiquark states. To examine the observed behavior we examine the properties of reaction amplitude using analyticity, unitarity and high-energy constraints. Following Regge prediction, for sufficiently large incident energy the five-particle amplitude for the reaction p\pi->p\pi\eta$ is proportional to the reggeon-particle scattering amplitude R\pi->\eta\pi$. In the resonance region, the reggeon-particle amplitudes are parametrized within N/D formalism supplemented by elastic unitarity constraints. At higher values of $\eta\pi$ invariant masse, the amplitude is reggeized similarly to normal four-particle amplitudes. Matching between the two parametrizations in the transition region is implemented via finite energy sum rule
Author(s) Vladiszlav Pauk, Adam Szczepaniak, Vincent Mathieu
Publication Date October 2016
Document Type Meeting
Primary Institution Thomas Jefferson National Accelerator Facility, Newport News
Affiliation Theory & Comp Physics / THEORY CENTER / THEORY CENTER
Funding Source Nuclear Physics (NP)
Proprietary? No
This publication conveys Technical Science Results
Document Numbers
JLAB Number: JLAB-THY-16-2422 OSTI Number: 1962052
LANL Number: Other Number: DOE/OR/23177-5796
Associated with an experiment No
Associated with EIC No
Supported by Jefferson Lab LDRD Funding No
Meeting / Conference
Meeting Name DNP Meeting of APS
Meeting Date 10/13/2016
Document Subtype Contributed Talk
Attachments/Datasets/DOI Link
Document(s)
MWS_DNP16-2016-020002.pdf (Accepted Manuscript)
Dataset(s) (none)
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