Tensor Polarization of the phi meson Photoproduced at High t

Abstract

As part of a measurement of the cross section of $\varphi$ meson photoproduction to high momentum transfer, we measured the polar angular decay distribution of the outgoing $K^{+}$ in the channel $\varphi \to K^{+}{K}^{-}$ in the $\varphi$ center-of-mass frame (the helicity frame). We find that s-channel helicity conservation (SCHC) holds in the kinematical range where $t$-channel exchange dominates (up to $-t\sim 2.5$ GeV${}^2$ for $E_{\gamma }$=3.6 GeV). Above this momentum, $u$-channel production of a $\varphi$ meson dominates and induces a violation of SCHC. The deduced value of the $\varphi NN$ coupling constant lies in the upper range of previously reported values.

arXiv comment6 pages; 5 figures

References in corpus (4)

• Photoproduction of Vector Mesons at Large Transfer
• Photoproduction of phi(1020) mesons on the proton at large momentum transfer
• Compton scattering, vector meson photoproduction and the partonic structure of the nucleon
• The photoproduction of vector mesons

Cited by in corpus (11)

• Diffractive $\varphi$-meson photoproduction on proton near threshold
• Data analysis techniques, differential cross sections, and spin density matrix elements for the reaction $\gamma p\to \varphi p$
• Light Baryon Spectroscopy
• Exclusive Photoproduction of the Cascade (Xi) Hyperons
• The extraction of $\varphi -N$ total cross section from $d(\gamma ,p{K}^{+}{K}^{-})n$
• First measurement of coherent $\varphi$-meson photoproduction on deuteron at low energies
• Near-threshold Photoproduction of Phi Mesons from Deuterium
• Exclusive Meson Photo- and Electro-production, a Window on the Structure of Hadronic Matter
• Polarization Observables in $\gamma N\to K\bar{K}N$
• Irreducible tensor approach to spin observables in photo production of mesons with arbitrary spin-parity $s^{\pi }$
• Study of the threshold behavior of the $\eta$N scattering amplitude through the associated photoproduction of $\varphi$- and $\eta$-mesons