Photoproduction of the f2(1270) Meson Using the CLAS Detector

M. Carver et al. (CLAS Collaboration)
Phys. Rev. Lett. 126, 082002 – Published 25 February 2021

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 JPC=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 ρπ+π, whereas decay to two neutral pions would likely be suppressed. Here, we measure for the first time the reaction γpπ0π0p, 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.

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  • Received 29 October 2020
  • Revised 8 January 2021
  • Accepted 4 February 2021

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

© 2021 American Physical Society

Physics Subject Headings (PhySH)

Nuclear Physics

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Vol. 126, Iss. 8 — 26 February 2021

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