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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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