Measurement of Spin-Density Matrix Elements in $\varphi (1020)\to K_S^0{K}_L^0$ Photoproduction with a Linearly Polarized Photon Beam at $E_{\gamma }=8.2-8.8$ GeV

Abstract

We measure the spin-density matrix elements (SDMEs) for the photoproduction of $\varphi (1020)$ off of the proton in its decay to $K_S^0{K}_L^0$, using 105 pb${}^{-1}$ of data collected with a linearly polarized photon beam using the GlueX experiment. The SDMEs are measured in nine bins of the squared four-momentum transfer $t$ in the range $-t=0.15-1.0$ GeV${}^2$, providing the first measurement of their $t$-dependence for photon beam energies $E_{\gamma }=8.2-8.8$ GeV. We confirm the dominance of Pomeron exchange in this region, and put constraints on the contribution of other Regge exchanges. We also find that helicity amplitudes where the helicity of the photon and the $\varphi (1020)$ differ by two units are negligible.

arXiv comment11 pages, 8 figures, accepted by Phys. Rev. C

References in corpus (11)

• Diffractive $\varphi$-meson photoproduction on proton near threshold
• The GlueX Beamline and Detector
• Data analysis techniques, differential cross sections, and spin density matrix elements for the reaction $\gamma p\to \varphi p$
• Construction and Performance of the Barrel Electromagnetic Calorimeter for the GlueX Experiment
• Measurement of Spin-Density Matrix Elements for $\varphi$-Meson Photoproduction from Protons and Deuterons Near Threshold
• Vector Meson Photoproduction with a Linearly Polarized Beam
• The GlueX Start Counter Detector
• Design and construction of a high-energy photon polarimeter
• The Central Drift Chamber for GlueX
• $\varphi$ photoproduction on the proton at $E_{\gamma }$ = 1.5 - 2.9 GeV
• Measurement of Spin-Density Matrix Elements in $\rho (770)$ Production with a Linearly Polarized Photon Beam at $E_{\gamma }=8.2-8.8\text{GeV}$