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

P. Aguar-Bartolomé, J. R.M. Annand, H. J. Arends, K. Bantawa, R. Beck, V. Bekrenev, H. Berghäuser, A. Braghieri, W. J. Briscoe, J. Brudvik, S. Cherepnya, R. F.B. Codling, C. Collicott, S. Costanza, A. Denig, E. J. Downie, P. Drexler, L. V. Fil'Kov, A. Fix, D. I. Glazier & 56 others R. Gregor, D. J. Hamilton, E. Heid, D. Hornidge, L. Isaksson, I. Jaegle, O. Jahn, T. C. Jude, V. L. Kashevarov, I. Keshelashvili, R. Kondratiev, M. Korolija, M. Kotulla, A. Koulbardis, S. Kruglov, B. Krusche, V. Lisin, K. Livingston, I. J.D. Macgregor, Y. Maghrbi, D. M. Manley, P. Masjuan, J. C. McGeorge, E. F. McNicoll, D. Mekterovic, V. Metag, A. Mushkarenkov, B. M.K. Nefkens, A. Nikolaev, R. Novotny, H. Ortega, M. Ostrick, P. Ott, P. B. Otte, B. Oussena, P. Pedroni, F. Pheron, A. Polonski, S. Prakhov, J. Robinson, G. Rosner, T. Rostomyan, S. Schumann, M. H. Sikora, D. I. Sober, A. Starostin, I. I. Strakovsky, I. M. Suarez, I. Supek, C. M. Tarbert, M. Thiel, A. Thomas, M. Unverzagt, D. P. Watts, D. Werthmüller, F. Zehr

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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.

Original languageEnglish
Article number044608
JournalPhysical Review C - Nuclear Physics
Volume89
Issue number4
DOIs
Publication statusPublished - 17 Apr 2014

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form factors
balls
detectors
decay
crystals
marking
statistics
spectrometers
slopes
photons

ASJC Scopus subject areas

  • Nuclear and High Energy Physics

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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.; 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.; Zehr, F.

In: Physical Review C - Nuclear Physics, Vol. 89, No. 4, 044608, 17.04.2014.

Research output: Contribution to journalArticle

Aguar-Bartolomé, P, Annand, JRM, Arends, HJ, Bantawa, K, Beck, R, Bekrenev, V, Berghäuser, H, Braghieri, A, Briscoe, WJ, Brudvik, J, Cherepnya, S, Codling, RFB, Collicott, C, Costanza, S, Denig, A, Downie, EJ, Drexler, P, Fil'Kov, LV, Fix, A, Glazier, DI, Gregor, R, Hamilton, DJ, Heid, E, Hornidge, D, Isaksson, L, Jaegle, I, Jahn, O, Jude, TC, Kashevarov, VL, Keshelashvili, I, Kondratiev, R, Korolija, M, Kotulla, M, Koulbardis, A, Kruglov, S, Krusche, B, Lisin, V, Livingston, K, Macgregor, IJD, Maghrbi, Y, Manley, DM, Masjuan, P, McGeorge, JC, McNicoll, EF, Mekterovic, D, Metag, V, Mushkarenkov, A, Nefkens, BMK, Nikolaev, A, Novotny, R, Ortega, H, Ostrick, M, Ott, P, Otte, PB, Oussena, B, Pedroni, P, Pheron, F, Polonski, A, Prakhov, S, Robinson, J, Rosner, G, Rostomyan, T, Schumann, S, Sikora, MH, Sober, DI, Starostin, A, Strakovsky, II, Suarez, IM, Supek, I, Tarbert, CM, Thiel, M, Thomas, A, Unverzagt, M, Watts, DP, Werthmüller, D & Zehr, F 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 - Nuclear Physics, vol. 89, no. 4, 044608. https://doi.org/10.1103/PhysRevC.89.044608
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. ; Zehr, F. / 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. In: Physical Review C - Nuclear Physics. 2014 ; Vol. 89, No. 4.
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AU - Aguar-Bartolomé, P.

AU - Annand, J. R.M.

AU - Arends, H. J.

AU - Bantawa, K.

AU - Beck, R.

AU - Bekrenev, V.

AU - Berghäuser, H.

AU - Braghieri, A.

AU - Briscoe, W. J.

AU - Brudvik, J.

AU - Cherepnya, S.

AU - Codling, R. F.B.

AU - Collicott, C.

AU - Costanza, S.

AU - Denig, A.

AU - Downie, E. J.

AU - Drexler, P.

AU - Fil'Kov, L. V.

AU - Fix, A.

AU - Glazier, D. I.

AU - Gregor, R.

AU - Hamilton, D. J.

AU - Heid, E.

AU - Hornidge, D.

AU - Isaksson, L.

AU - Jaegle, I.

AU - Jahn, O.

AU - Jude, T. C.

AU - Kashevarov, V. L.

AU - Keshelashvili, I.

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AU - Maghrbi, Y.

AU - Manley, D. M.

AU - Masjuan, P.

AU - McGeorge, J. C.

AU - McNicoll, E. F.

AU - Mekterovic, D.

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AU - Mushkarenkov, A.

AU - Nefkens, B. M.K.

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AU - Ott, P.

AU - Otte, P. B.

AU - Oussena, B.

AU - Pedroni, P.

AU - Pheron, F.

AU - Polonski, A.

AU - Prakhov, S.

AU - Robinson, J.

AU - Rosner, G.

AU - Rostomyan, T.

AU - Schumann, S.

AU - Sikora, M. H.

AU - Sober, D. I.

AU - Starostin, A.

AU - Strakovsky, I. I.

AU - Suarez, I. M.

AU - Supek, I.

AU - Tarbert, C. M.

AU - Thiel, M.

AU - Thomas, A.

AU - Unverzagt, M.

AU - Watts, D. P.

AU - Werthmüller, D.

AU - Zehr, F.

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