φ-meson photoproduction off the protons by using linearly polarized photons in the mid- to higher-t regimes at threshold energies

Julian Salamanca; Philip L; for the; CLAS collaboration

doi:10.1088/1674-1137/33/12/052

Chinese Physics C> 2009, Vol. 33> Issue(12) : 1349-1353 DOI: 10.1088/1674-1137/33/12/052

φ-meson photoproduction off the protons by using linearly polarized photons in the mid- to higher-t regimes at threshold energies

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Abstract：
Observables from vector meson photoproduction by linearly-polarized photons can be expressed in term of bilinear combinations of helicity amplitudes parameterized by the Spin Density Matrix Elements (SDMEs). These SDMEs give
straightforward relations for understanding the nature of the parity exchange at threshold energies, as well as for extracting signatures of the Okubo-Zweig-Iizuka violation. This paper will show preliminary measurements of SDMEs for γp→φp in the photon energy range of 1.7 to 1.9 GeV (momentum transfer squared t range of －1.2 to －0.25 GeV²) and 1.9 to 2.1 GeV (t range of －1.4 to －0.25 GeV²) from the g8b experimental data collected in the summer of 2005 in the Hall B of Jefferson Lab.

References

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. Nakano T et al. Nucl. Phys. A, 2001, 684: 71-792. Titov A I, Oh Y, YANG S N, Morii T. Phys. Rev. C, 2001,58: 2429-24493. Mibe T et al. Phys. Rev. Lett., 2005, 95: 1820014. Cole P L, Tedeschi D J (spokespersons). Photoproductionof Mesons with Linearly Polarized Photons, JLab Exper-iment E-98-1095. Mecking B A et al. Nucl. Instr. and Meth. A, 2003, 503/3:513-5536. Titov A I, Lee T-S H. Phys. Rev. C, 2003, 67: 0652057. Ballam J et al. Phys. Rev. D, 1973, 7: 3150-31778. Schilling K, Seyboth P, Wolf G. Nucl. Phys. B, 1970, 15:397-412

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Julian Salamanca, Philip L, for the and CLAS collaboration. φ-meson photoproduction off the protons by using linearly polarized photons in the mid- to higher-t regimes at threshold energies[J]. Chinese Physics C, 2009, 33(12): 1349-1353. doi: 10.1088/1674-1137/33/12/052

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Received: 2009-08-07
Revised: 1900-01-01

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沈阳化工大学材料科学与工程学院沈阳 110142

φ-meson photoproduction off the protons by using linearly polarized photons in the mid- to higher-t regimes at threshold energies

Corresponding author: Julian Salamanca,

Received Date: 2009-08-07
Accepted Date: 1900-01-01
Available Online: 2009-12-05

Abstract:

Observables from vector meson photoproduction by linearly-polarized photons can be expressed in term of bilinear combinations of helicity amplitudes parameterized by the Spin Density Matrix Elements (SDMEs). These SDMEs give
straightforward relations for understanding the nature of the parity exchange at threshold energies, as well as for extracting signatures of the Okubo-Zweig-Iizuka violation. This paper will show preliminary measurements of SDMEs for γp→φp in the photon energy range of 1.7 to 1.9 GeV (momentum transfer squared t range of －1.2 to －0.25 GeV²) and 1.9 to 2.1 GeV (t range of －1.4 to －0.25 GeV²) from the g8b experimental data collected in the summer of 2005 in the Hall B of Jefferson Lab.