Journal article
Authors list: Adlarson, P.; Afzal, F.; Aguar-Bartolome, P.; Ahmed, Z.; Annand, J. R. M.; Arends, H. J.; Bantawa, K.; Beck, R.; Berghaeuser, H.; Biroth, M.; Borisov, N. S.; Braghieri, A.; Briscoe, W. J.; Cherepnya, S.; Cividini, F.; Collicott, C.; Costanza, S.; Danilkin, I. V.; Denig, A.; Dieterle, M.; Downie, E. J.; Drexler, P.; Bondy, M. I. Ferretti; Fil'kov, L. V.; Gardner, S.; Garni, S.; Glazier, D. I.; Glowa, D.; Gradl, W.; Gurevich, G. M.; Hamilton, D. J.; Hornidge, D.; Huber, G. M.; Jude, T. C.; Kaeser, A.; Kashevarov, V. L.; Kay, S.; Keshelashvili, I.; Kondratiev, R.; Korolija, M.; Krusche, B.; Lazarev, A.; Linturi, J.; Lisin, V.; Livingston, K.; MacGregor, I. J. D.; Macrae, R.; Manley, D. M.; Martel, P. P.; McGeorge, J. C.; McNicoll, E. F.; Metag, V.; Middleton, D. G.; Miskimen, R.; Mornacchi, E.; Mullen, C.; Mushkarenkov, A.; Neganov, A.; Neiser, A.; Nikolaev, A.; Oberle, M.; Ostrick, M.; Ott, P.; Otte, P. B.; Paudyal, D.; Pedroni, P.; Polonski, A.; Prakhov, S.; Rajabi, A.; Robinson, J.; Ron, G.; Rosner, G.; Rostomyan, T.; Sfienti, C.; Sikora, M. H.; Sokhoyan, V.; Spieker, K.; Steffen, O.; Strakovsky, I. I.; Strandberg, B.; Strub, Th.; Supek, I.; Thiel, A.; Thiel, M.; Thomas, A.; Unverzagt, M.; Usov, Yu. A.; Wagner, S.; Walford, N.; Watts, D. P.; Werthmueller, D.; Wettig, J.; Witthauer, L.; Wolfes, M.; Zana, L. A.
Publication year: 2017
Journal: Physical Review C
Volume number: 95
Issue number: 3
ISSN: 2469-9985
eISSN: 2469-9993
Open access status: Green
DOI Link: https://doi.org/10.1103/PhysRevC.95.035208
Publisher: American Physical Society
Abstract:
The Dalitz decays eta -> e(+)e(-)gamma and omega -> pi(0)e(+)e(-) have been measured in the gamma p -> eta p and gamma p -> omega p reactions, respectively, with the A2 tagged-photon facility at the Mainz Microtron. The value obtained for the slope parameter of the electromagnetic transition form factor of eta, Lambda(-2)(eta) = (1.97 +/- 0.11(tot)) GeV-2, is in good agreement with previous measurements of the eta -> e(+)e(-)gamma and eta ->mu(+)mu(-)gamma decays. The uncertainty obtained in the value of Lambda(-2)(eta) is lower than in previous results based on the eta -> e(+)e(-)gamma decay. The value obtained for the omega slope parameter Lambda(0-2)(omega pi) = (1.99 +/- 0.21(tot)) GeV-2, is somewhat lower than previous measurements based on omega -> pi(0)mu(+)mu(-), but the results for the omega transition form factor are in better agreement with theoretical calculations, compared to earlier experiments.
Citation Styles
Harvard Citation style: Adlarson, P., Afzal, F., Aguar-Bartolome, P., Ahmed, Z., Annand, J., Arends, H., et al. (2017) Measurement of the ω → π0e+e- and η → e+e-γ Dalitz decays with the A2 setup at the Mainz Microtron, Physical Review C, 95(3), Article 035208. https://doi.org/10.1103/PhysRevC.95.035208
APA Citation style: Adlarson, P., Afzal, F., Aguar-Bartolome, P., Ahmed, Z., Annand, J., Arends, H., Bantawa, K., Beck, R., Berghaeuser, H., Biroth, M., Borisov, N., Braghieri, A., Briscoe, W., Cherepnya, S., Cividini, F., Collicott, C., Costanza, S., Danilkin, I., Denig, A., ...Zana, L. (2017). Measurement of the ω → π0e+e- and η → e+e-γ Dalitz decays with the A2 setup at the Mainz Microtron. Physical Review C. 95(3), Article 035208. https://doi.org/10.1103/PhysRevC.95.035208
Keywords
LIGHT VECTOR; MAMI-B; TAGGED PHOTON SPECTROMETER; TAPS; TRANSITION FORM-FACTOR; VECTOR-MESONS
