Study of η and η′ Photoproduction at 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. Käser; 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; J. C. McGeorge; E. McNicol; D. P. Watts; (A2 Collaboration at MAMI); Dominik Werthmüller

doi:10.1103/PhysRevLett.118.212001

Study of η and η′ Photoproduction at 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 BondyL. 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. Käser, 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, J. C. McGeorge, E. McNicol, D. P. Watts, (A2 Collaboration at MAMI), Dominik Werthmüller

Physics

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Abstract

The reactions γp→ηp and γp→η′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 η photoproduction at the energies in the vicinity of the η′ threshold, W=1896 MeV (Eγ=1447 MeV). Within the framework of a revised ηMAID isobar model, the cusp, in connection with a steep rise of the η′ 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 ηp and η′p. Including the new high-accuracy results in the ηMAID fit to available η and η′ photoproduction data allows the determination of the N(1895)1/2- properties.

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

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1701.04809Submitted manuscript, 289 KBLicence: Unspecified
PhysRevLett.118.212001
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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., Dieterle, M., ... Werthmüller, D. (2017). Study of η and η′ Photoproduction at MAMI. Physical Review Letters, 118(21), Article 212001. https://doi.org/10.1103/PhysRevLett.118.212001

@article{bfe4350f6f604c2ab741ed84c492a40a,

title = "Study of η and η′ Photoproduction at MAMI",

abstract = "The reactions γp→ηp and γp→η′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 η photoproduction at the energies in the vicinity of the η′ threshold, W=1896 MeV (Eγ=1447 MeV). Within the framework of a revised ηMAID isobar model, the cusp, in connection with a steep rise of the η′ 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 ηp and η′p. Including the new high-accuracy results in the ηMAID fit to available η and η′ photoproduction data allows the determination of the N(1895)1/2- properties.",

author = "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 {Ferretti Bondy}, {M. I.} 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. K{\"a}ser 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 McGeorge, {J. C.} and E. McNicol and Watts, {D. P.} and {(A2 Collaboration at MAMI)} and Dominik Werthm{\"u}ller",

note = "{\textcopyright} 2017, The Author(s). ",

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",

}

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, Ferretti Bondy, MI, 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, Käser, 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, McGeorge, JC, McNicol, E, Watts, DP, (A2 Collaboration at MAMI) & Werthmüller, D 2017, 'Study of η and η′ Photoproduction at MAMI', Physical Review Letters, vol. 118, no. 21, 212001. https://doi.org/10.1103/PhysRevLett.118.212001

TY - JOUR

T1 - Study of η and η′ Photoproduction at 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 - Ferretti Bondy, M. I.

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 - Käser, 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 - McGeorge, J. C.

AU - McNicol, E.

AU - Watts, D. P.

AU - (A2 Collaboration at MAMI)

AU - Werthmüller, Dominik

PY - 2017/5/26

Y1 - 2017/5/26

N2 - The reactions γp→ηp and γp→η′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 η photoproduction at the energies in the vicinity of the η′ threshold, W=1896 MeV (Eγ=1447 MeV). Within the framework of a revised ηMAID isobar model, the cusp, in connection with a steep rise of the η′ 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 ηp and η′p. Including the new high-accuracy results in the ηMAID fit to available η and η′ photoproduction data allows the determination of the N(1895)1/2- properties.

AB - The reactions γp→ηp and γp→η′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 η photoproduction at the energies in the vicinity of the η′ threshold, W=1896 MeV (Eγ=1447 MeV). Within the framework of a revised ηMAID isobar model, the cusp, in connection with a steep rise of the η′ 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 ηp and η′p. Including the new high-accuracy results in the ηMAID fit to available η and η′ photoproduction data allows the determination of the N(1895)1/2- properties.

UR - http://www.scopus.com/inward/record.url?scp=85019758255&partnerID=8YFLogxK

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 η and η′ Photoproduction at MAMI

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