Study of eta and eta' Photoproduction at MAMI

A2 Collaboration MAMI; V. L. Kashevarov; P. Ott; S. Prakhov; P. Adlarson; F. Afzal; Z. Ahmed; C. S. Akondi; J. R. M. Annand; H. J. Arends; R. Beck; A. Braghieri; W. J. Briscoe; F. Cividini; R. Codling; C. Collicott; S. Costanza; A. Denig; E. J. Downie; M. Dieterle; M. I. Ferretti Bondy; L. V. Fil'kov; A. Fix; S. Gardner; S. Garni; D. I. Glazier; D. Glowa; W. Gradl; G. Gurevich; D. J. Hamilton; D. Hornidge; D. Howdle; G. M. Huber; A. Kaser; S. Kay; I. Keshelashvili; R. Kondratiev; M. Korolija; B. Krusche; J. Linturi; V. Lisin; K. Livingston; I. J. D. MacGregor; R. MacRae; J. Mancell; D. M. Manley; P. P. Martel; C. Mullen; S. Schumann; D. P. Watts; L. Zana

doi:10.1103/PhysRevLett.118.212001

Study of eta and eta' Photoproduction at MAMI

A2 Collaboration MAMI
, V. L. Kashevarov
, P. Ott
, S. Prakhov
, P. Adlarson
, F. Afzal
, Z. Ahmed
, C. S. Akondi
, J. R. M. Annand
, H. J. Arends
, R. Beck
, A. Braghieri
, W. J. Briscoe
, F. Cividini
, R. Codling
, C. Collicott
, S. Costanza
, A. Denig
, E. J. Downie
, M. Dieterle

M. I. Ferretti Bondy, L. V. Fil'kov, A. Fix, S. Gardner, S. Garni, D. I. Glazier, D. Glowa, W. Gradl, G. Gurevich, D. J. Hamilton, D. Hornidge, D. Howdle, G. M. Huber, A. Kaser, S. Kay, I. Keshelashvili, R. Kondratiev, M. Korolija, B. Krusche, J. Linturi, V. Lisin, K. Livingston, I. J. D. MacGregor, R. MacRae, J. Mancell, D. M. Manley, P. P. Martel, C. Mullen, S. Schumann, D. P. Watts, L. Zana

School of Physics and Astronomy

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

Abstract

The reactions gamma p -> eta p and gamma p -> eta'p are measured from their thresholds up to the center-of-mass energy W = 1.96 GeV with the tagged-photon facilities at the Mainz Microtron, MAMI. Differential cross sections are obtained with unprecedented statistical accuracy, providing fine energy binning and full production-angle coverage. A strong cusp is observed in the total cross section for eta photoproduction at the energies in the vicinity of the eta' threshold, W = 1896 MeV (E-gamma = 1447 MeV). Within the framework of a revised eta MAID isobar model, the cusp, in connection with a steep rise of the eta' total cross section from its threshold, can only be explained by a strong coupling of the poorly known N(1895)1/2(-) state to both eta p and eta' p. Including the new high-accuracy results in the eta MAID fit to available eta and eta' photoproduction data allows the determination of the N(1895)1/2(-) properties.

Original language	English
Article number	212001
Number of pages	6
Journal	Physical Review Letters
Volume	118
Issue number	21
DOIs	https://doi.org/10.1103/PhysRevLett.118.212001
Publication status	Published - 26 May 2017

Keywords / Materials (for Non-textual outputs)

SPECTROMETER
PHOTONS
PROTON
TAPS

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10.1103/PhysRevLett.118.212001

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A2 Collaboration MAMI, Kashevarov, V. L., Ott, P., Prakhov, S., Adlarson, P., Afzal, F., Ahmed, Z., Akondi, C. S., Annand, J. R. M., Arends, H. J., Beck, R., Braghieri, A., Briscoe, W. J., Cividini, F., Codling, R., Collicott, C., Costanza, S., Denig, A., Downie, E. J., ... Zana, L. (2017). Study of eta and eta' Photoproduction at MAMI. Physical Review Letters, 118(21), Article 212001. https://doi.org/10.1103/PhysRevLett.118.212001

@article{ab5173dd5cfd459783e7a77c8333ba8e,

title = "Study of eta and eta' Photoproduction at MAMI",

abstract = "The reactions gamma p -> eta p and gamma p -> eta'p are measured from their thresholds up to the center-of-mass energy W = 1.96 GeV with the tagged-photon facilities at the Mainz Microtron, MAMI. Differential cross sections are obtained with unprecedented statistical accuracy, providing fine energy binning and full production-angle coverage. A strong cusp is observed in the total cross section for eta photoproduction at the energies in the vicinity of the eta' threshold, W = 1896 MeV (E-gamma = 1447 MeV). Within the framework of a revised eta MAID isobar model, the cusp, in connection with a steep rise of the eta' total cross section from its threshold, can only be explained by a strong coupling of the poorly known N(1895)1/2(-) state to both eta p and eta' p. Including the new high-accuracy results in the eta MAID fit to available eta and eta' photoproduction data allows the determination of the N(1895)1/2(-) properties.",

keywords = "SPECTROMETER, PHOTONS, PROTON, TAPS",

author = "\{A2 Collaboration MAMI\} and Kashevarov, \{V. L.\} and P. Ott and S. Prakhov and P. Adlarson and F. Afzal and Z. Ahmed and Akondi, \{C. S.\} and Annand, \{J. R. M.\} and Arends, \{H. J.\} and R. Beck and A. Braghieri and Briscoe, \{W. J.\} and F. Cividini and R. Codling and C. Collicott and S. Costanza and A. Denig and Downie, \{E. J.\} and M. Dieterle and Bondy, \{M. I. Ferretti\} and Fil'kov, \{L. V.\} and A. Fix and S. Gardner and S. Garni and Glazier, \{D. I.\} and D. Glowa and W. Gradl and G. Gurevich and Hamilton, \{D. J.\} and D. Hornidge and D. Howdle and Huber, \{G. M.\} and A. Kaser and S. Kay and I. Keshelashvili and R. Kondratiev and M. Korolija and B. Krusche and J. Linturi and V. Lisin and K. Livingston and MacGregor, \{I. J. D.\} and R. MacRae and J. Mancell and Manley, \{D. M.\} and Martel, \{P. P.\} and C. Mullen and S. Schumann and Watts, \{D. P.\} and L. Zana",

year = "2017",

month = may,

day = "26",

doi = "10.1103/PhysRevLett.118.212001",

language = "English",

volume = "118",

journal = "Physical Review Letters",

issn = "0031-9007",

publisher = "American Physical Society",

number = "21",

}

A2 Collaboration MAMI, Kashevarov, VL, Ott, P, Prakhov, S, Adlarson, P, Afzal, F, Ahmed, Z, Akondi, CS, Annand, JRM, Arends, HJ, Beck, R, Braghieri, A, Briscoe, WJ, Cividini, F, Codling, R, Collicott, C, Costanza, S, Denig, A, Downie, EJ, Dieterle, M, Bondy, MIF, Fil'kov, LV, Fix, A, Gardner, S, Garni, S, Glazier, DI, Glowa, D, Gradl, W, Gurevich, G, Hamilton, DJ, Hornidge, D, Howdle, D, Huber, GM, Kaser, A, Kay, S, Keshelashvili, I, Kondratiev, R, Korolija, M, Krusche, B, Linturi, J, Lisin, V, Livingston, K, MacGregor, IJD, MacRae, R, Mancell, J, Manley, DM, Martel, PP, Mullen, C, Schumann, S, Watts, DP & Zana, L 2017, 'Study of eta and eta' Photoproduction at MAMI', Physical Review Letters, vol. 118, no. 21, 212001. https://doi.org/10.1103/PhysRevLett.118.212001

TY - JOUR

T1 - Study of eta and eta' Photoproduction at MAMI

AU - A2 Collaboration MAMI

AU - Kashevarov, V. L.

AU - Ott, P.

AU - Prakhov, S.

AU - Adlarson, P.

AU - Afzal, F.

AU - Ahmed, Z.

AU - Akondi, C. S.

AU - Annand, J. R. M.

AU - Arends, H. J.

AU - Beck, R.

AU - Braghieri, A.

AU - Briscoe, W. J.

AU - Cividini, F.

AU - Codling, R.

AU - Collicott, C.

AU - Costanza, S.

AU - Denig, A.

AU - Downie, E. J.

AU - Dieterle, M.

AU - Bondy, M. I. Ferretti

AU - Fil'kov, L. V.

AU - Fix, A.

AU - Gardner, S.

AU - Garni, S.

AU - Glazier, D. I.

AU - Glowa, D.

AU - Gradl, W.

AU - Gurevich, G.

AU - Hamilton, D. J.

AU - Hornidge, D.

AU - Howdle, D.

AU - Huber, G. M.

AU - Kaser, A.

AU - Kay, S.

AU - Keshelashvili, I.

AU - Kondratiev, R.

AU - Korolija, M.

AU - Krusche, B.

AU - Linturi, J.

AU - Lisin, V.

AU - Livingston, K.

AU - MacGregor, I. J. D.

AU - MacRae, R.

AU - Mancell, J.

AU - Manley, D. M.

AU - Martel, P. P.

AU - Mullen, C.

AU - Schumann, S.

AU - Watts, D. P.

AU - Zana, L.

PY - 2017/5/26

Y1 - 2017/5/26

N2 - The reactions gamma p -> eta p and gamma p -> eta'p are measured from their thresholds up to the center-of-mass energy W = 1.96 GeV with the tagged-photon facilities at the Mainz Microtron, MAMI. Differential cross sections are obtained with unprecedented statistical accuracy, providing fine energy binning and full production-angle coverage. A strong cusp is observed in the total cross section for eta photoproduction at the energies in the vicinity of the eta' threshold, W = 1896 MeV (E-gamma = 1447 MeV). Within the framework of a revised eta MAID isobar model, the cusp, in connection with a steep rise of the eta' total cross section from its threshold, can only be explained by a strong coupling of the poorly known N(1895)1/2(-) state to both eta p and eta' p. Including the new high-accuracy results in the eta MAID fit to available eta and eta' photoproduction data allows the determination of the N(1895)1/2(-) properties.

AB - The reactions gamma p -> eta p and gamma p -> eta'p are measured from their thresholds up to the center-of-mass energy W = 1.96 GeV with the tagged-photon facilities at the Mainz Microtron, MAMI. Differential cross sections are obtained with unprecedented statistical accuracy, providing fine energy binning and full production-angle coverage. A strong cusp is observed in the total cross section for eta photoproduction at the energies in the vicinity of the eta' threshold, W = 1896 MeV (E-gamma = 1447 MeV). Within the framework of a revised eta MAID isobar model, the cusp, in connection with a steep rise of the eta' total cross section from its threshold, can only be explained by a strong coupling of the poorly known N(1895)1/2(-) state to both eta p and eta' p. Including the new high-accuracy results in the eta MAID fit to available eta and eta' photoproduction data allows the determination of the N(1895)1/2(-) properties.

KW - SPECTROMETER

KW - PHOTONS

KW - PROTON

KW - TAPS

U2 - 10.1103/PhysRevLett.118.212001

DO - 10.1103/PhysRevLett.118.212001

M3 - Article

SN - 0031-9007

VL - 118

JO - Physical Review Letters

JF - Physical Review Letters

IS - 21

M1 - 212001

ER -

Study of eta and eta' Photoproduction at MAMI

Abstract

Keywords / Materials (for Non-textual outputs)

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