Measurement of the Transverse Target and Beam-Target Asymmetries in η Meson Photoproduction at MAMI

被引：39

作者：

Akondi, C. S. ^{[1
]}

Annand, J. R. M. ^{[2
]}

Arends, H. J. ^{[3
]}

Beck, R. ^{[4
]}

Bernstein, A. ^{[5
]}

Borisov, N. ^{[6
]}

Braghieri, A. ^{[7
]}

Briscoe, W. J. ^{[8
]}

Cherepnya, S. ^{[9
]}

Collicott, C. ^{[10
]}

Costanza, S. ^{[7
]}

Downie, E. J. ^{[3
,8
]}

Dieterle, M. ^{[11
]}

Fix, A. ^{[12
]}

Fil'kov, L. V. ^{[9
]}

Garni, S. ^{[11
]}

Glazier, D. I. ^{[2
,13
]}

Gradl, W. ^{[3
]}

Gurevich, G. ^{[14
]}

Barrientos, P. Hall ^{[13
]}

Hamilton, D. ^{[2
]}

Hornidge, D. ^{[15
]}

Howdle, D. ^{[2
]}

Huber, G. M. ^{[16
]}

Kashevarov, V. L. ^{[3
,9
]}

Keshelashvili, I. ^{[11
]}

Kondratiev, R. ^{[14
]}

Korolija, M. ^{[17
]}

Krusche, B. ^{[11
]}

Lazarev, A. ^{[6
]}

Lisin, V. ^{[14
]}

Livingston, K. ^{[2
]}

MacGregor, I. J. D. ^{[2
]}

Mancel, J. ^{[2
]}

Manley, D. M. ^{[1
]}

Martel, P. ^{[5
,18
]}

McNicoll, E. F. ^{[2
]}

Meyer, W. ^{[19
]}

Middleton, D. ^{[3
,15
]}

Miskimen, R. ^{[18
]}

Mushkarenkov, A. ^{[7
,18
]}

Nefkens, B. M. K. ^{[20
]}

Neganov, A. ^{[6
]}

Nikolaev, A. ^{[4
]}

Oberle, M. ^{[11
]}

Ostrick, M. ^{[3
]}

Ortega, H. ^{[3
]}

Ott, P. ^{[3
]}

Otte, P. B. ^{[3
]}

Oussena, B. ^{[3
,8
]}

机构：

[1] Kent State Univ, Kent, OH 44242 USA

[2] Univ Glasgow, SUPA, Sch Phys & Astron, Glasgow G12 8QQ, Lanark, Scotland

[3] Johannes Gutenberg Univ Mainz, Inst Kernphys, D-55099 Mainz, Germany

[4] Univ Bonn, Helmholtz Inst Strahlen & Kernphys, D-53115 Bonn, Germany

[5] MIT, Cambridge, MA 02139 USA

[6] Joint Inst Nucl Res, Dubna 141980, Russia

[7] Ist Nazl Fis Nucl, Sez Pavia, I-27100 Pavia, Italy

[8] George Washington Univ, Washington, DC 20052 USA

[9] PN Lebedev Phys Inst, Moscow 119991, Russia

[10] St Marys Univ, Dept Phys & Astron, Halifax, NS B3H 3C3, Canada

[11] Univ Basel, Dept Phys, CH-4056 Basel, Switzerland

[12] Tomsk Polytech Univ, Phys Math Lab, Tomsk 634034, Russia

[13] Univ Edinburgh, SUPA, Sch Phys, Edinburgh EH9 3JZ, Midlothian, Scotland

[14] Inst Nucl Res, Moscow 125047, Russia

[15] Mt Allison Univ, Sackville, NB E4L 1E6, Canada

[16] Univ Regina, Regina, SK S4S 0A2, Canada

[17] Rudjer Boskovic Inst, HR-10000 Zagreb, Croatia

[18] Univ Massachusetts, Amherst, MA 01003 USA

[19] Ruhr Univ Bochum, Inst Expt Phys, D-44780 Bochum, Germany

[20] Univ Calif Los Angeles, Los Angeles, CA 90095 USA

来源：

PHYSICAL REVIEW LETTERS | 2014年 / 113卷 / 10期

基金：

加拿大自然科学与工程研究理事会;

关键词：

TAGGED PHOTON SPECTROMETER; RESONANCES;

D O I：

10.1103/PhysRevLett.113.102001

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We present new data for the transverse target asymmetry T and the very first data for the beam-target asymmetry F in the (gamma) over right arrow (p) over right arrow -> eta p reaction up to a center-of-mass energy of W = 1.9 GeV. The data were obtained with the Crystal-Ball/ TAPS detector setup at the Glasgow tagged photon facility of the Mainz Microtron MAMI. All existing model predictions fail to reproduce the new data indicating a significant impact on our understanding of the underlying dynamics of eta meson photoproduction. The peculiar nodal structure observed in existing T data close to threshold is not confirmed.

引用

页数：5

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