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; 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

doi:10.1103/PhysRevC.89.044608

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. GlazierR. 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

^*Corresponding author for this work

Physics

Research output: Contribution to journal › Article › peer-review

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 language	English
Article number	044608
Journal	Physical Review C - Nuclear Physics
Volume	89
Issue number	4
DOIs	https://doi.org/10.1103/PhysRevC.89.044608
Publication status	Published - 17 Apr 2014

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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., ... 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, 89(4), Article 044608. https://doi.org/10.1103/PhysRevC.89.044608

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title = "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",

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.",

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

year = "2014",

month = apr,

day = "17",

doi = "10.1103/PhysRevC.89.044608",

language = "English",

volume = "89",

journal = "Physical Review C - Nuclear Physics",

issn = "0556-2813",

publisher = "American Physical Society",

number = "4",

}

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

TY - JOUR

T1 - 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

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.

AU - Kondratiev, R.

AU - Korolija, M.

AU - Kotulla, M.

AU - Koulbardis, A.

AU - Kruglov, S.

AU - Krusche, B.

AU - Lisin, V.

AU - Livingston, K.

AU - Macgregor, I. J.D.

AU - Maghrbi, Y.

AU - Manley, D. M.

AU - Masjuan, P.

AU - McGeorge, J. C.

AU - McNicoll, E. F.

AU - Mekterovic, D.

AU - Metag, V.

AU - Mushkarenkov, A.

AU - Nefkens, B. M.K.

AU - Nikolaev, A.

AU - Novotny, R.

AU - Ortega, H.

AU - Ostrick, M.

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.

PY - 2014/4/17

Y1 - 2014/4/17

N2 - 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.

AB - 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.

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U2 - 10.1103/PhysRevC.89.044608

DO - 10.1103/PhysRevC.89.044608

M3 - Article

AN - SCOPUS:84899673170

SN - 0556-2813

VL - 89

JO - Physical Review C - Nuclear Physics

JF - Physical Review C - Nuclear Physics

IS - 4

M1 - 044608

ER -

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

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