Photoproduction of multi-meson final states — recent results from the Crystal-Barrel/TAPS experiment at ELSA-

U. Thoma (for the CBELSA/TAPS collaboration)

doi:10.1088/1674-1137/33/12/010

Chinese Physics C> 2009, Vol. 33> Issue(12) : 1105-1112 DOI: 10.1088/1674-1137/33/12/010

Photoproduction of multi-meson final states — recent results from the Crystal-Barrel/TAPS experiment at ELSA-

U. Thoma (for the CBELSA/TAPS collaboration)

(HISKP, Universität Bonn, Nussallee 14-16, 53115 Bonn, Germany)

Abstract
HTML
Reference
Related

PDF

Abstract：
Multi-meson final states such as γp→pπ⁰π⁰ and γp→pπ⁰η have been investigated with the Crystal-Barrel/TAPS experiment at ELSA. Baryon cascades via Δπ and Δη and also via higher mass baryon resonances are clearly observed. Based on this data and on data from other reactions a partial wave analysis has been performed from which partial decay widths of various N^* and Δ^* states into the different pπ⁰π⁰ and pπ⁰η decay channels have been determined, leading partly to unexpected results. In addition, polarisation observables have been investigated. The beam asymmetry ∑ has been determined for both reactions and double polarisation data using a longitudinally polarised target and a circularly or linearly polarised photon beam has been taken. Given the angular coverage of the Crystal-Barrel/TAPS experiment this data covers almost the full angular range and phase space. This data will provide new and important information for the partial wave analyses and bring us one step closer towards a complete experiment.

References

[1]

. Capstick S, Isgur N. Phys. Rev. D, 1986, 34: 28092. Glozman L Y et al. Phys. Rev. D, 1998, 58: 0940303. Loring U et al. Eur. Phys. J. A, 2001, 10: 395-4474. Capstick S, Roberts W. Prog. Part. Nucl. Phys., 2000, 45:S2415. Oset E et al. Int. J. Mod. Phys. A, 2005, 20: 16196. Doring M, Oset E, Strottman D. Phys. Rev. C, 2006, 73:0452097. Lutz M F M, Kolomeitsev E E. Nucl. Phys. A, 2005, 755:298. Thoma U et al. Phys. Lett. B, 2008, 659: 879. This conference, contribution of Sarantsev A10. Sarantsev A V et al. Phys. Lett. B, 2008, 659: 9411. Prakhov S et al. Phys. Rev. C, 2004, 69: 04520212. Amsler C et al (Particle Data Group). Phys. Lett. B, 2008,667: 113. Horn I et al. Eur. Phys. J. A, 2008, 38: 17314. Horn I et al. Phys. Rev. Lett., 2008, 101: 20200215. Chiang W T, Tabakin F. Phys. Rev. C, 1997, 55: 205416. This conference, contribution of Beck R17. This conference, contribution of Schmieden H18. Roberts W, Oed T. Phys. Rev. C, 2005, 71: 05520119. Strauch S et al. Phys. Rev. Lett., 2005, 95: 16200320. Hillert W. Eur. Phys. J. A, 2006, 28S1: 13921. Elsner D et al. Eur. Phys. J. A, 2009, 39: 37322. Sokhoyan V. PhD thesis, Universitat Bonn (in preparation)23. Assa ri Y et al. Phys. Rev. Lett., 2003, 90: 22200124. Gutz E, Sokhoyan V, van Pee H et al. Eur. Phys. J. A,2008, 35: 29125. Gutz E. PhD thesis, Universitat Bonn (in preparation)26. Ajaka J et al. Phys. Rev. Lett., 2008, 100: 05200327. Anisovich A V et al. Eur. Phys. J. A, 2005, 24: 11128. Anisovich A V et al. Eur. Phys. J. A, 2007, 34: 24329. Bradtke et al. NIM A, 1999, 436: 43030. Aker E et al. Nucl. Instrum. Meth. A, 1992, 321: 69

[1]	YU Si-Hai , WANG Bao-Kai , CHEN Xiao-Lin , DENG Wei-Zhen . Study of the heavy molecular states in the quark model with meson exchange interaction. Chinese Physics C, 2012, 36(1): 25-30. doi: 10.1088/1674-1137/36/1/004
[2]	B. Meadows (representing the BABAR collaboration) . D⁰D⁰ mixing and other recent charm results from BABAR. Chinese Physics C, 2010, 34(6): 780-787. doi: 10.1088/1674-1137/34/6/028
[3]	FANG Shuang-Shi , on behalf , of the , and ZEUS . Recent results on strangeness, charm and beauty production at HERA. Chinese Physics C, 2010, 34(6): 757-764. doi: 10.1088/1674-1137/34/6/025
[4]	V. M. Aulchenko , E. M. Baldin , A. K. Barladyan . Recent results from the KEDR detector. Chinese Physics C, 2010, 34(6): 650-655. doi: 10.1088/1674-1137/34/6/007
[5]	Cristina Morales , on behalf , the NA . Recent results from NA48/2. Chinese Physics C, 2010, 34(6): 749-752. doi: 10.1088/1674-1137/34/6/023
[6]	Klaus Götzen (on behalf of the BES-Ⅲ collaboration) . Recent results on hadron spectroscopy from BES. Chinese Physics C, 2010, 34(6): 638-643. doi: 10.1088/1674-1137/34/6/005
[7]	LIU Bei-Jiang , for BES . Recent BES results on hadron spectroscopy. Chinese Physics C, 2010, 34(9): 1303-1306. doi: 10.1088/1674-1137/34/9/029
[8]	K. Hicks (for the LEPS collaboration) . Recent results from LEPS. Chinese Physics C, 2010, 34(9): 1275-1280. doi: 10.1088/1674-1137/34/9/023
[9]	T. Haas . Recent results from HERA. Chinese Physics C, 2010, 34(9): 1254-1258. doi: 10.1088/1674-1137/34/9/019
[10]	H. E. Jackson (for the HERMES collaboration) . Recent results from the HERMES experiment. Chinese Physics C, 2010, 34(9): 1247-1253. doi: 10.1088/1674-1137/34/9/018
[11]	Julian Salamanca , Philip L , for the , CLAS collaboration . φ-meson photoproduction off the protons by using linearly polarized photons in the mid- to higher-t regimes at threshold energies. Chinese Physics C, 2009, 33(12): 1349-1353. doi: 10.1088/1674-1137/33/12/052
[12]	ZHOU Hai-Qing . Recent results of two-boson-exchange effects in the parity-violating elastic electron-proton scattering. Chinese Physics C, 2009, 33(12): 1401-1403. doi: 10.1088/1674-1137/33/12/065
[13]	DAI Lian-Rong , LIU Jia , ZHANG Dan . Multiquark states and the mixing of scalar meson. Chinese Physics C, 2009, 33(12): 1397-1400. doi: 10.1088/1674-1137/33/12/064
[14]	V. D. Burkert , L. Elouadrhiri , G. V. Fedotov , E. N. Golovach , B. S. Ishkhanov . Recent results on nucleon resonance electrocouplings from the studies of π⁺π^－p electroproduction with the CLAS detector. Chinese Physics C, 2009, 33(12): 1210-1215. doi: 10.1088/1674-1137/33/12/025
[15]	I Glazier , for the , Crystal Ball , at MAMI-C , and A . Precision measurements of strangeness photoproduction at threshold energies with the Crystal Ball at MAMI-C. Chinese Physics C, 2009, 33(12): 1358-1361. doi: 10.1088/1674-1137/33/12/054
[16]	M.H. Sikora , D.I. Glazier , D.P. Watts . Recoil polarimetry in meson photoproduction at MAMI. Chinese Physics C, 2009, 33(12): 1377-1380. doi: 10.1088/1674-1137/33/12/059
[17]	H. Schmieden (for the CBELSA/TAPS collaboration) . Photoproduction of ω-Mesons at ELSA and the role of azimuthal asymmetries. Chinese Physics C, 2009, 33(12): 1146-1152. doi: 10.1088/1674-1137/33/12/016
[18]	R. Beck (for the CBELSA/TAPS collaboration) . Recent results for single meson production from the Crystal-Barrel/TAPS experiment at ELSA. Chinese Physics C, 2009, 33(12): 1056-1062. doi: 10.1088/1674-1137/33/12/003
[19]	SHEN Xiao-Yan , (for the BES Collaboration) . Recent results on light hadron spectroscopy from BESⅡ. Chinese Physics C, 2008, 32(6): 448-451. doi: 10.1088/1674-1137/32/6/009
[20]	Zhang Yang , Hu Yuan , Wu Yuanfang , Liu Lianshou , Zhang Yonghe . On the Intermittency and Correlation Integral of Multiparticle Final-States in High Energy Collisions. Chinese Physics C, 1994, 18(S2): 175-184.

Access

Get Citation

U. Thoma (for the CBELSA/TAPS collaboration). Photoproduction of multi-meson final states — recent results from the Crystal-Barrel/TAPS experiment at ELSA-[J]. Chinese Physics C, 2009, 33(12): 1105-1112. doi: 10.1088/1674-1137/33/12/010

RIS(for EndNote,Reference Manager,ProCite)

BibTex

Txt

Milestone

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

Article Metric

Article Views(2758)
PDF Downloads(622)
Cited by(0)

Policy on re-use

To reuse of subscription content published by CPC, the users need to request permission from CPC, unless the content was published under an Open Access license which automatically permits that type of reuse.

通讯作者: 陈斌, bchen63@163.com

1.
沈阳化工大学材料科学与工程学院沈阳 110142

Photoproduction of multi-meson final states — recent results from the Crystal-Barrel/TAPS experiment at ELSA-

(HISKP, Universität Bonn, Nussallee 14-16, 53115 Bonn, Germany)

Received Date: 2009-08-07

Accepted Date: 1900-01-01

Available Online: 2009-12-05

Abstract:

Multi-meson final states such as γp→pπ⁰π⁰ and γp→pπ⁰η have been investigated with the Crystal-Barrel/TAPS experiment at ELSA. Baryon cascades via Δπ and Δη and also via higher mass baryon resonances are clearly observed. Based on this data and on data from other reactions a partial wave analysis has been performed from which partial decay widths of various N^* and Δ^* states into the different pπ⁰π⁰ and pπ⁰η decay channels have been determined, leading partly to unexpected results. In addition, polarisation observables have been investigated. The beam asymmetry ∑ has been determined for both reactions and double polarisation data using a longitudinally polarised target and a circularly or linearly polarised photon beam has been taken. Given the angular coverage of the Crystal-Barrel/TAPS experiment this data covers almost the full angular range and phase space. This data will provide new and important information for the partial wave analyses and bring us one step closer towards a complete experiment.

HTML

Reference (1)

Photoproduction of multi-meson final states — recent results from the Crystal-Barrel/TAPS experiment at ELSA-

Abstract：

References

Access

Article Metrics

Metrics

通讯作者: 陈斌, bchen63@163.com

Email This Article

Photoproduction of multi-meson final states — recent results from the Crystal-Barrel/TAPS experiment at ELSA-

HTML

目录