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Publication Information
Title $\pi^-p\to\eta^{(\prime)}\, \pi^- p$ in the double Regge region
Abstract The production of $\eta^{(\prime)}\pi$ pairs constitutes one of the golden channels to search for hybrid exotics, with explicit gluonic degrees of freedom. Understanding the dynamics and backgrounds associated to $\eta^{(\prime)}\pi$ production above the resonance region is required to impose additional constraints to the resonance extraction. We consider the reaction $\pi^-p\to \pi^-\eta^{(\prime)} \,p$ measured by COMPASS. We show that the data in $2.4 < m_{\eta^{(\prime)}\pi} < 3.0\gev$ can be described by amplitudes based on double Regge exchanges. The angular distribution of the meson pairs, in particular in the $\eta' \pi$ channel, can be attributed to flavor singlet exchanges, suggesting the presence of a large gluon content that couples strongly to the produced mesons.
Author(s) Cesar FERNANDEZ RAMIREZ, Vincent Mathieu, Mikhail Mikhasenko, Miguel Albaladejo, Astrid Hiller Blin, Alessandro Pilloni
Publication Date July 2021
Document Type Journal Article
Primary Institution Indiana University , Bloomington, IN
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-21-3354 OSTI Number: 1824282
LANL Number: arXiv:2104.10646 Other Number: DOE/OR/23177-5172
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 81
Issue
Page(s) 647
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