New determination of the eta transition form factor in the Dalitz decay eta -> e(+) e(-) gamma with the Crystal Ball/TAPS detectors at the Mainz Microtron

A2 Collaboration MAMI; P. Aguar-Bartolome; J. R. M. Annand; H. J. Arends; K. Bantawa; R. Beck; V. Bekrenev; H. Berghaeuser; 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; S. Schumann; M. H. Sikora; D. P. Watts

doi:10.1103/PhysRevC.89.044608

New determination of the eta transition form factor in the Dalitz decay eta -> e(+) e(-) gamma with the Crystal Ball/TAPS detectors at the Mainz Microtron

A2 Collaboration MAMI, P. Aguar-Bartolome^*, J. R. M. Annand, H. J. Arends, K. Bantawa, R. Beck, V. Bekrenev, H. Berghaeuser, 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. FixD. 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, S. Schumann, M. H. Sikora, D. P. Watts

^*Corresponding author for this work

School of Physics and Astronomy

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

Abstract

The Dalitz decay eta -> e(+) e(-) gamma has been measured in the gamma p -> eta p 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 eta -> e(+) e(-) gamma. The value obtained for the slope parameter Lambda(-2) of the eta transition form factor, Lambda(-2) = (1.95 +/- 0.15(stat) +/- 0.10(syst)) GeV-2, is in good agreement with recent measurements conducted in eta -> e(+) e(-) gamma and eta -> mu(+) mu(-) gamma decays, as well as with recent form-factor calculations. The uncertainty obtained in the value of Lambda(-2) is lower compared to results from previous measurements of the eta -> e(+) e(-) gamma decay.

Original language	English
Article number	044608
Number of pages	11
Journal	Physical Review C
Volume	89
Issue number	4
DOIs	https://doi.org/10.1103/PhysRevC.89.044608
Publication status	Published - 17 Apr 2014

Keywords / Materials (for Non-textual outputs)

TAGGED PHOTON SPECTROMETER
VECTOR-MESONS
MAMI
NA60
TAPS

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10.1103/PhysRevC.89.044608

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A2 Collaboration MAMI, Aguar-Bartolome, P., Annand, J. R. M., Arends, H. J., Bantawa, K., Beck, R., Bekrenev, V., Berghaeuser, 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., ... Watts, D. P. (2014). New determination of the eta transition form factor in the Dalitz decay eta -> e(+) e(-) gamma with the Crystal Ball/TAPS detectors at the Mainz Microtron. Physical Review C, 89(4), Article 044608. https://doi.org/10.1103/PhysRevC.89.044608

@article{17f47f1b4f2d40978dd562966b5dfafa,

title = "New determination of the eta transition form factor in the Dalitz decay eta -> e(+) e(-) gamma with the Crystal Ball/TAPS detectors at the Mainz Microtron",

abstract = "The Dalitz decay eta -> e(+) e(-) gamma has been measured in the gamma p -> eta p 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 eta -> e(+) e(-) gamma. The value obtained for the slope parameter Lambda(-2) of the eta transition form factor, Lambda(-2) = (1.95 +/- 0.15(stat) +/- 0.10(syst)) GeV-2, is in good agreement with recent measurements conducted in eta -> e(+) e(-) gamma and eta -> mu(+) mu(-) gamma decays, as well as with recent form-factor calculations. The uncertainty obtained in the value of Lambda(-2) is lower compared to results from previous measurements of the eta -> e(+) e(-) gamma decay.",

keywords = "TAGGED PHOTON SPECTROMETER, VECTOR-MESONS, MAMI, NA60, TAPS",

author = "\{A2 Collaboration MAMI\} and P. Aguar-Bartolome and Annand, \{J. R. M.\} and Arends, \{H. J.\} and K. Bantawa and R. Beck and V. Bekrenev and H. Berghaeuser 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 S. Schumann and Sikora, \{M. H.\} and Watts, \{D. P.\}",

year = "2014",

month = apr,

day = "17",

doi = "10.1103/PhysRevC.89.044608",

language = "English",

volume = "89",

journal = "Physical Review C",

issn = "0556-2813",

publisher = "American Physical Society",

number = "4",

}

A2 Collaboration MAMI, Aguar-Bartolome, P, Annand, JRM, Arends, HJ, Bantawa, K, Beck, R, Bekrenev, V, Berghaeuser, 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, Schumann, S, Sikora, MH & Watts, DP 2014, 'New determination of the eta transition form factor in the Dalitz decay eta -> e(+) e(-) gamma with the Crystal Ball/TAPS detectors at the Mainz Microtron', Physical Review C, vol. 89, no. 4, 044608. https://doi.org/10.1103/PhysRevC.89.044608

TY - JOUR

T1 - New determination of the eta transition form factor in the Dalitz decay eta -> e(+) e(-) gamma with the Crystal Ball/TAPS detectors at the Mainz Microtron

AU - A2 Collaboration MAMI

AU - Aguar-Bartolome, P.

AU - Annand, J. R. M.

AU - Arends, H. J.

AU - Bantawa, K.

AU - Beck, R.

AU - Bekrenev, V.

AU - Berghaeuser, 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 - Schumann, S.

AU - Sikora, M. H.

AU - Watts, D. P.

PY - 2014/4/17

Y1 - 2014/4/17

N2 - The Dalitz decay eta -> e(+) e(-) gamma has been measured in the gamma p -> eta p 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 eta -> e(+) e(-) gamma. The value obtained for the slope parameter Lambda(-2) of the eta transition form factor, Lambda(-2) = (1.95 +/- 0.15(stat) +/- 0.10(syst)) GeV-2, is in good agreement with recent measurements conducted in eta -> e(+) e(-) gamma and eta -> mu(+) mu(-) gamma decays, as well as with recent form-factor calculations. The uncertainty obtained in the value of Lambda(-2) is lower compared to results from previous measurements of the eta -> e(+) e(-) gamma decay.

AB - The Dalitz decay eta -> e(+) e(-) gamma has been measured in the gamma p -> eta p 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 eta -> e(+) e(-) gamma. The value obtained for the slope parameter Lambda(-2) of the eta transition form factor, Lambda(-2) = (1.95 +/- 0.15(stat) +/- 0.10(syst)) GeV-2, is in good agreement with recent measurements conducted in eta -> e(+) e(-) gamma and eta -> mu(+) mu(-) gamma decays, as well as with recent form-factor calculations. The uncertainty obtained in the value of Lambda(-2) is lower compared to results from previous measurements of the eta -> e(+) e(-) gamma decay.

KW - TAGGED PHOTON SPECTROMETER

KW - VECTOR-MESONS

KW - MAMI

KW - NA60

KW - TAPS

U2 - 10.1103/PhysRevC.89.044608

DO - 10.1103/PhysRevC.89.044608

M3 - Article

SN - 0556-2813

VL - 89

JO - Physical Review C

JF - Physical Review C

IS - 4

M1 - 044608

ER -

New determination of the eta transition form factor in the Dalitz decay eta -> e(+) e(-) gamma with the Crystal Ball/TAPS detectors at the Mainz Microtron

Abstract

Keywords / Materials (for Non-textual outputs)

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