Photoproduction of the f2(1270 ) Meson Using the CLAS Detector
Abstract
The quark structure of the f2(1270 ) meson has, for many years, been assumed to be a pure quark-antiquark (q q ¯) 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 ρ →π+π-, whereas decay to two neutral pions would likely be suppressed. Here, we measure for the first time the reaction γ p →π0π0p , using the CEBAF Large Acceptance Spectrometer detector at Jefferson Lab for incident beam energies between 3.6 and 5.4 GeV. Differential cross sections, d σ /d t , for f2(1270 ) photoproduction are extracted with good precision due to low backgrounds and are compared to theoretical calculations.
- Publication:
-
Physical Review Letters
- Pub Date:
- February 2021
- DOI:
- 10.1103/PhysRevLett.126.082002
- arXiv:
- arXiv:2010.16006
- Bibcode:
- 2021PhRvL.126h2002C
- Keywords:
-
- Nuclear Experiment;
- High Energy Physics - Experiment
- E-Print:
- 5 pages, 4 figures