Investigation of the electromagnetic structure of. eta. and. eta. prime mesons by two-photon interactions

The TPC/Two-Gamma facility at the SLAC {ital e}{sup +}{ital e}{sup {minus}} storage ring PEP was used to study the reactions {gamma}{gamma}{sup *}{r arrow}{eta} and {gamma}{gamma}{sup *}{r arrow}{eta}{prime}. The {eta}{gamma}{sup *}{gamma} and {eta}{prime}{gamma}{sup *}{gamma} transition form factor...

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Veröffentlicht in:	Physical review letters 1990-01, Vol.64:2
Hauptverfasser:	Aihara, H., Alston-Garnjost, M., Avery, R.E., Barbaro-Galtieri, A., Barker, A.R., Barnett, B.A., Bauer, D.A., Bay, A., Bobbink, G.J., Buchanan, C.D., Buijs, A., Caldwell, D.O., Chao, H., Chun, S., Clark, A.R., Cowan, G.D., Crane, D.A., Dahl, O.I., Daoudi, M., Derby, K.A., Eastman, J.J., Eberhard, P.H., Edberg, T.K., Eisner, A.M., Erne, F.C., Fairfield, K.H., Hauptman, J.M., Hofmann, W., Hylen, J., Kamae, T., Kaye, H.S., Kenney, R.W., Khacheryan, S., Kofler, R.R., Langeveld, W.G.J., Layter, J.G., Lin, W.T., Linde, F.L., Loken, S.C., Lu, A., Lynch, G.R., Madaras, R.J., Magnuson, B.D., Masek, G.E., Mathis, L.G., Matthews, J.A.J., Maxfield, S.J., Miller, E.S., Moses, W., Nygren, D.R., Oddone, P.J., Paar, H.P., Park, S.K., Pellett, D.E., Pripstein, M., Ronan, M.T., Ross, R.R., Rouse, F.R., Schwitkis, K.A., Sens, J.C., Shapiro, G., Shen, B.C., Smith, J.R., Steinman, J.S., Stephens, R.W., Stevenson, M.L., Stork, D.H., Strauss, M.G., Sullivan, M.K., Takahashi, T., Toutounchi, S., van Tyen, R., TPC /Two-Gamma Collaboration
Format:	Artikel
Sprache:	eng
Schlagworte:	645101 - High Energy Physics- Particle Interactions & Properties-Experimental- Electromagnetic Interactions & Properties ANNIHILATION BASIC INTERACTIONS BOSONS BRANCHING RATIO CHIRAL SYMMETRY CROSS SECTIONS DATA ELECTROMAGNETIC INTERACTIONS ELECTRON-POSITRON INTERACTIONS ELEMENTARY PARTICLES ENERGY RANGE ETA PRIME-958 MESONS EXPERIMENTAL DATA FIELD THEORIES GEV RANGE GEV RANGE 01-10 HADRONS INFORMATION INTERACTIONS LEPTON-LEPTON INTERACTIONS MASS SPECTRA MATHEMATICAL MODELS MATRIX ELEMENTS MESONS MIXING NATIONAL ORGANIZATIONS NUMERICAL DATA PARTICLE INTERACTIONS PARTICLE MODELS PARTICLE PRODUCTION PHOTON-PHOTON INTERACTIONS PHYSICS OF ELEMENTARY PARTICLES AND FIELDS PSEUDOSCALAR MESONS QUANTUM CHROMODYNAMICS QUANTUM FIELD THEORY SPECTRA STANFORD LINEAR ACCELERATOR CENTER SYMMETRY TIME PROJECTION CHAMBERS US DOE US ERDA US ORGANIZATIONS VECTOR DOMINANCE MODEL
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Zusammenfassung:	The TPC/Two-Gamma facility at the SLAC {ital e}{sup +}{ital e}{sup {minus}} storage ring PEP was used to study the reactions {gamma}{gamma}{sup }{r arrow}{eta} and {gamma}{gamma}{sup }{r arrow}{eta}{prime}. The {eta}{gamma}{sup }{gamma} and {eta}{prime}{gamma}{sup }{gamma} transition form factors were measured as functions of {ital Q}{sup 2}, the negative of the invariant mass squared of the tagged photon, in the range 0.1{lt}{ital Q}{sup 2}{lt}7 GeV{sup 2}. These determinations of the electromagnetic structure of the {eta} and {eta}{prime} mesons are consistent with both vector-meson dominance and QCD. They also provide new measurements of the pseudoscalar mixing angle and decay constants.
ISSN:	0031-9007 1079-7114
DOI:	10.1103/PhysRevLett.64.172