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Measurement of the omega -> pi(0)e(+)e(-) and eta -> e(+)e(-)gamma Dalitz decays with the A2 setup at the Mainz Microtron (CROSBI ID 252010)

Prilog u časopisu | izvorni znanstveni rad | međunarodna recenzija

(A2 Collaboration at MAMI) Adlarson, P. ; Afzal, F. ; Aguar-Bartolomé, P. ; Ahmed, Z. ; Annand, J. R. M. ; Arends, H. J. ; Bantawa, K. ; Beck, R. ; Berghäuser, H. ; Biroth, M. et al. Measurement of the omega -> pi(0)e(+)e(-) and eta -> e(+)e(-)gamma Dalitz decays with the A2 setup at the Mainz Microtron // Physical review. C, 95 (2017), 3; 035208, 18. doi: 10.1103/PhysRevC.95.035208

Podaci o odgovornosti

Adlarson, P. ; Afzal, F. ; Aguar-Bartolomé, P. ; Ahmed, Z. ; Annand, J. R. M. ; Arends, H. J. ; Bantawa, K. ; Beck, R. ; Berghäuser, 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. ; Ferretti Bondy, M. I. ; 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. ; Käser, A. ; Kashevarov, V. L. ; Kay, S. ; Keshelashvili, I. ; Kondratiev, R. ; Korolija, Milorad ; 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, Ivan ; Thiel, A. ; Thiel, M. ; Thomas, A. ; Unverzagt, M. ; Usov, Yu. A. ; Wagner, S. ; Walford, N. ; Watts, D. P. ; Werthmüller, D. ; Wettig, J. ; Witthauer, L. ; Wolfes, M. ; Zana, L. A.

A2 Collaboration at MAMI

engleski

Measurement of the omega -> pi(0)e(+)e(-) and eta -> e(+)e(-)gamma Dalitz decays with the A2 setup at the Mainz Microtron

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.

transition form-factor ; tagged photon spectrometer ; vector-mesons ; light vector ; mami-b ; scattering ; taps

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Podaci o izdanju

95 (3)

2017.

035208

18

objavljeno

2469-9985

2469-9993

10.1103/PhysRevC.95.035208

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Fizika

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