New determination of the η transition form factor in the Dalitz decay η→e+e−γ with the Crystal Ball/TAPS detectors at the Mainz Microtron

Aguar-Bartolomé, P. et al. (2014) New determination of the η transition form factor in the Dalitz decay η→e+e−γ with the Crystal Ball/TAPS detectors at the Mainz Microtron. Physical Review C, 89(4), 044608. (doi:10.1103/PhysRevC.89.044608)

Full text not currently available from Enlighten.

Publisher's URL: http://dx.doi.org/10.1103/PhysRevC.89.044608

Abstract

The Dalitz decay η→e+e−γ has been measured in the γp→ηp reaction with the Crystal Ball and TAPS multiphoton spectrometers, together with the photon-tagging facility at the Mainz Microtron MAMI. The experimental statistic used in this work is one order of magnitude greater than in any previous measurement of η→e+e−γ. The value obtained for the slope parameter Λ−2 of the η transition form factor, Λ−2=(1.95±0.15stat±0.10syst) GeV−2, is in good agreement with recent measurements conducted in η→e+e−γ and η→μ+μ−γ decays, as well as with recent form-factor calculations. The uncertainty obtained in the value of Λ−2 is lower compared to results from previous measurements of the η→e+e−γ decay.

Item Type:Articles
Status:Published
Refereed:Yes
Glasgow Author(s) Enlighten ID:McGeorge, Dr John and Robinson, Mr Jamie and Livingston, Dr Kenneth and Codling, Mr Richard and MacGregor, Professor Douglas and McNicoll, Miss Eilidh and Annand, Dr John and Hamilton, Dr David and Glazier, Dr Derek and Rosner, Professor Guenther
Authors: Aguar-Bartolomé, P., Annand, J. R. M., Arends, H. J., Bantawa, K., Beck, R., Bekrenev, V., Berghäuser, H., Braghieri, A., Briscoe, W. J., Brudvik, J., Cherepnya, S., Codling, R. F. B., Collicott, C., Costanza, S., Denig, A., Downie, E. J., Drexler, P., Fil'kov, L. V., Fix, A., Glazier, D. I., Gregor, R., Hamilton, D. J., Heid, E., Hornidge, D., Isaksson, L., Jaegle, I., Jahn, O., Jude, T. C., Kashevarov, V. L., Keshelashvili, I., Kondratiev, R., Korolija, M., Kotulla, M., Koulbardis, A., Kruglov, S., Krusche, B., Lisin, V., Livingston, K., MacGregor, I. J. D., Maghrbi, Y., Manley, D. M., Masjuan, P., McGeorge, J. C., McNicoll, E. F., Mekterovic, D., Metag, V., Mushkarenkov, A., Nefkens, B. M. K., Nikolaev, A., Novotny, R., Ortega, H., Ostrick, M., Ott, P., Otte, P. B., Oussena, B., Pedroni, P., Pheron, F., Polonski, A., Prakhov, S., Robinson, J., Rosner, G., Rostomyan, T., Schumann, S., Sikora, M. H., Sober, D. I., Starostin, A., Strakovsky, I. I., Suarez, I. M., Supek, I., Tarbert, C. M., Thiel, M., Thomas, A., Unverzagt, M., Watts, D. P., Werthmüller, D., and Zehr, F.
College/School:College of Science and Engineering > School of Physics and Astronomy
Journal Name:Physical Review C
Publisher:American Physical Society
ISSN:0556-2813
ISSN (Online):1089-490X

University Staff: Request a correction | Enlighten Editors: Update this record