Photoproduction of the F2(1270) Meson Using the CLAS Detector

Authors

M. Carver
A. Celentano
K. Hicks
L. Marsicano
V. Mathieu
A. Pilloni
K. P. Adhikari
S. Adhikari
M. J. Amaryan
Gerard P. Gilfoyle, University of RichmondFollow
et al.

DOI

10.1103/PhysRevLett.126.082002

Abstract

The quark structure of the f₂(1270) meson has, for many years, been assumed to be a pure quark-antiquark qq ̄ resonance with quantum numbers J ^PC = 2⁺⁺. Recently, it was proposed that the f₂(1270) is a molecular state made from the attractive interaction of two ρ mesons. Such a state would be expected to decay strongly to final states with charged pions due to the dominant decay ρ -> π⁺ π−, whereas decay to two neutral pions would likely be suppressed. Here, we measure for the first time the reaction gamma p -> π⁺ π− p, using the CEBAF Large Acceptance Spectrometer detector at Jefferson Lab for incident beam energies between 3.6 and 5.4 GeV. Differential cross sections, dσ/dt, for f₂ (1270) photoproduction are extracted with good precision due to low backgrounds and are compared to theoretical calculations.

Document Type

Article

Publication Date

2-21-2021

Publisher Statement

Copyright © 2021, APS Physics.

DOI: https://doi.org/10.1103/PhysRevLett.126.082002.

Recommended Citation

Carver, M., A. Celentano, K. Hicks, L. Marsicano, V. Mathieu, A. Pilloni, K. P. Adhikari, G. P. Gilfoyle, et al. “Photoproduction of the F2(1270) Meson Using the CLAS Detector.” Physical Review Letters 126, no. 8 (February 25, 2021): 082002. https://doi.org/10.1103/PhysRevLett.126.082002.