Photoproduction of the $f_2(1270)$ meson using the CLAS detector

Abstract

The quark structure of the $f_2(1270)$ meson has, for many years, been assumed to be a pure quark-antiquark ($q\bar{q}$) resonance with quantum numbers $J^{PC}=2^{++}$. Recently, it was proposed that the $f_2(1270)$ is a molecular state made from the attractive interaction of two $\rho$-mesons. Such a state would be expected to decay strongly to final states with charged pions, due to the dominant decay $\rho \to {\pi }^{+}{\pi }^{-}$, whereas decay to two neutral pions would likely be suppressed. Here, we measure for the first time the reaction $\gamma p\to {\pi }^0{\pi }^{0}p$, using the CLAS detector at Jefferson Lab for incident beam energies between 3.6-5.4~GeV. Differential cross sections, $d\sigma /dt$, for $f_2(1270)$ photoproduction are extracted with good precision, due to low backgrounds, and are compared with theoretical calculations.

arXiv comment5 pages, 4 figures

References in corpus (8)

• The ρρinteraction in the hidden gauge formalism and the f_0(1370) and f_2(1270) resonances
• Decays of tensor mesons and the tensor glueball in an effective field approach
• Properties of the tensor mesons $f_2(1270)$ and $f_2^{\prime }(1525)$
• Photoproduction of ${\pi }^{+}{\pi }^{-}$ meson pairs on the proton
• Exclusive photoproduction of ${\pi }^0$ up to large values of Mandelstam variables $s,t$ and $u$ with CLAS
• Exclusive tensor meson photoproduction
• Photoproduction of the $f_2(1270)$ resonance
• First measurement of direct photoproduction of the $a_2(1320{)}^0$ meson on the proton

Cited by in corpus (3)

• Novel approaches in Hadron Spectroscopy
• From well-known tensor mesons to yet unknown axial-tensor mesons
• Gravitational form factors of pions, kaons and nucleons from dispersion relations