Photoproduction of ω-Mesons at ELSA and the role of azimuthal asymmetries

H. Schmieden (for the CBELSA/TAPS collaboration)

doi:10.1088/1674-1137/33/12/016

Chinese Physics C> 2009, Vol. 33> Issue(12) : 1146-1152 DOI: 10.1088/1674-1137/33/12/016

Photoproduction of ω-Mesons at ELSA and the role of azimuthal asymmetries

H. Schmieden (for the CBELSA/TAPS collaboration)

(Rheinische Friedrich-Wilhelms-Universität, Physikalisches Institut, D-53115 Bonn, Germany)

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Abstract：
Measurements of ω photoproduction of the Crystal-Barrel/TAPS experiment at the ELSA accelerator of Bonn University are presented which used linearly polarized tagged photon beam from threshold to E_γ=1700 MeV. The azimuthal asymmetries Σ and Σ_π indicate s-channel resonance contributions on top of the established t-channel exchange processes. These findings are further enhanced by a very first measurement of the G-asymmetry which, in addition to the polarized photon beam, also requires a longitudinally polarized proton target. An intuitive interpretation of the specific sensitivity of the azimuthal asymmetries to the reaction mechanisms involved is given.

References

[1]

. Durr S et al (BMW collaboration). Science, 2008, 322:12242. Lohring U, Metsch B, Petry H. Eur. Phys. J. A, 2001, 10:3953. Roberts C. Chin. Phys. C (HEP NP), 2009, 33:4. Capstick S, Roberts W. Prog. Part. Nucl. Phys., 2000, 45:2415. Battaglieri M et al. Phys. Rev. Lett., 2003, 90: 0220026. Ballam J et al. Phys. Rev. D, 1973, 7: 31507. Friman B, Soyeur M. Nucl. Phys. A, 1996, 600: 4778. Barth J et al. Eur. Phys. J. A, 2003, 18: 1179. Ambrozewicz P et al. Phys. Rev. C, 2004, 70: 03520310. Ajaka J et al. Phys. Rev. Lett., 2006, 96: 13200311. Penner G, Mosel U. Phys. Rev. C, 2002, 66: 05521212. Shklyar V et al. Phys. Rev. C, 2005, 71: 05520613. ZHAO Q, Al-Khalili J S, Cole P L. Phys. Rev. C, 2005, 71:05400414. Schilling K, Seyboth P, Wolf G E. Nucl. Phys. B, 1970, 15:397|412; 18: 33215. Sarantsev A V et al. Eur. Phys. J. A, 2009, 39: 61|7016. Titov A, Kampfer B. Phys. Rev. C, 2008, 78: 03820117. ZHAO Q. Phys. Rev. C, 2001, 63: 02520318. Titov A, Lee T-S H. Phys. Rev. C, 2002, 66: 01520419. Burkardt M, Miller A, Nowak W-D, e-Print:arXiv:0812.2208 [hep-ph]20. Beck R (for the CBELSA/TAPS collaboration). Chin.Phys. C (HEP NP), 2009, 33:21. Elsner D et al. Eur. Phys. J. A, 2009 39: 37322. Thoma U (for the CBELSA/TAPS collaboration). Chin.Phys. C (HEP NP), 2009, 33:23. Klein Frank et al. Phys. Rev. D, 2008, 78: 11710124. Dutz H et al. Nucl. Instrum. Methods A, 1995, 356: 111;Nucl. Instrum. Methods A, 1998, 418: 23325. Eberhardt H. Doctoral Thesis, Bonn, 2009. in preparation26. Junkersfeld J et al. Eur. Phys. J. A, 2007, 31: 36527. Nanova M et al. Eur. Phys. J. A, 2008, 35: 333

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H. Schmieden (for the CBELSA/TAPS collaboration). Photoproduction of ω-Mesons at ELSA and the role of azimuthal asymmetries[J]. Chinese Physics C, 2009, 33(12): 1146-1152. doi: 10.1088/1674-1137/33/12/016

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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

Photoproduction of ω-Mesons at ELSA and the role of azimuthal asymmetries

(Rheinische Friedrich-Wilhelms-Universität, Physikalisches Institut, D-53115 Bonn, Germany)

Received Date: 2009-08-07

Accepted Date: 1900-01-01

Available Online: 2009-12-05

Abstract:

Measurements of ω photoproduction of the Crystal-Barrel/TAPS experiment at the ELSA accelerator of Bonn University are presented which used linearly polarized tagged photon beam from threshold to E_γ=1700 MeV. The azimuthal asymmetries Σ and Σ_π indicate s-channel resonance contributions on top of the established t-channel exchange processes. These findings are further enhanced by a very first measurement of the G-asymmetry which, in addition to the polarized photon beam, also requires a longitudinally polarized proton target. An intuitive interpretation of the specific sensitivity of the azimuthal asymmetries to the reaction mechanisms involved is given.

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Photoproduction of ω-Mesons at ELSA and the role of azimuthal asymmetries

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Photoproduction of ω-Mesons at ELSA and the role of azimuthal asymmetries

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