https://doi.org/10.1140/epjc/s10052-021-09420-1
Regular Article - Theoretical Physics
in the double-Regge region
Joint Physics Analysis Center
1
Pedagogical University of Krakow, 30-084, Kraków, Poland
2
Department of Physics, Indiana University, 47405, Bloomington, IN, USA
3
Theory Center, Thomas Jefferson National Accelerator Facility, 23606, Newport News, VA, USA
4
Instituto de Ciencias Nucleares, Universidad Nacional Autónoma de México, 04510, Mexico City, Mexico
5
Departament de Física Quàntica i Astrofísica and Institut de Ciències del Cosmos, Universitat de Barcelona, 08028, Martí i Franquès 1, Spain
6
Departamento de Física Teórica, Universidad Complutense de Madrid and IPARCOS, 28040, Madrid, Spain
7
CERN, 1211, Geneva 23, Switzerland
8
INFN Sezione di Roma, 00185, Rome, Italy
9
Center for Exploration of Energy and Matter, Indiana University, 47403, Bloomington, IN, USA
b
cesar.fernandez@nucleares.unam.mx
Received:
22
April
2021
Accepted:
5
July
2021
Published online:
23
July
2021
The production of 
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 production above the resonance region is required to impose additional constraints to the resonance extraction. We consider the reaction 
measured by COMPASS. We show that the data in 
can be described by amplitudes based on double-Regge exchanges. The angular distribution of the meson pairs, in particular in the 
channel, can be attributed to flavor singlet exchanges, suggesting the presence of a large gluon content that couples strongly to the produced mesons.
© The Author(s) 2021. corrected publication 2021
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