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Diffractive Phi-meson photoproduction on proton near threshold.

The LEPS collaboration Mibe, T. ; Chang, W.C. ; Nakano, T. ; et al.
Phys.Rev.Lett. 95 (2005) 182001, 2005.
Inspire Record 684863 DOI 10.17182/hepdata.31587

Photoproduction of $\phi$-meson on protons was studied by means of linearly polarized photons at forward angles in the low-energy region from threshold to $E_{\gamma}$= 2.37 GeV. The differential cross sections at $t = -|t|_{min}$ do not increase smoothly as $E_{\gamma}$ increases, but show a local maximum at around 2.0 GeV. The angular distributions demonstrate that $\phi$-mesons are photo-produced predominantly by helicity-conserving processes, and the local maximum is not likely due to unnatural-parity processes.

14 data tables
Table 1

Differential cross section as a function of T+ABS(TMIN) in the photon energy range 1.57 to 1.67 GeV.

Table 2

Differential cross section as a function of T+ABS(TMIN) in the photon energy range 1.67 to 1.77 GeV.

Table 3

Differential cross section as a function of T+ABS(TMIN) in the photon energy range 1.77 to 1.87 GeV.

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