New data on γ→p→→ηp with polarized photons and protons and their implications for N<sup>⁎</sup> → Nη decays

Müller, J.; Hartmann, J.; Grüner, M.; Afzal, F.; Anisovich, A. V.; Bantes, B.; Bayadilov, D.; Beck, R.; Becker, M.; Beloglazov, Y.; Berlin, A.; Bichow, M.; Böse, S.; Brinkmann, K. T.; Challand, T.; Crede, V.; Dietz, F.; Dieterle, M.; Drexler, P.; Dutz, H.; Eberhardt, H.; Elsner, D.; Ewald, R.; Fornet-Ponse, K.; Friedrich, S.; Frommberger, F.; Funke, C.; Gottschall, M.; Gridnev, A.; Goertz, S.; Gutz, E.; Hammann, C.; Hannen, V.; Hannappel, J.; Herick, J.; Hillert, W.; Hoffmeister, P.; Honisch, C.; Jahn, O.; Jude, T.; Jaegle, I.; Käser, A.; Kaiser, D.; Lang, M.; Messi, F.; Roth, B.; Thiel, A.; Walther, D.; Wendel, C.; Wilson, A.

New data on γ→p→→ηp with polarized photons and protons and their implications for N^⁎ → Nη decays

Mark

Müller, J. ; Hartmann, J. ; Grüner, M. ; Afzal, F. ; Anisovich, A. V. ; Bantes, B. ; Bayadilov, D. ; Beck, R. ; Becker, M. ^LU and Beloglazov, Y. , et al. (2020) In Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics 803.

Abstract: The polarization observables T,E,P,H, and G in photoproduction of η mesons off protons are measured for photon energies from threshold to W=2400 MeV (T), 2280 MeV (E), 1620 MeV (P,H), or 1820 MeV (G), covering nearly the full solid angle. The data are compared to predictions from the SAID, MAID, JüBo, and BnGa partial-wave analyses. A refit within the BnGa approach including further data yields precise branching ratios for the Nη decay of nucleon resonances. A Nη-branching ratio of 0.33±0.04 for N(1650)1/2⁻ is found, which reduces the large and controversially discussed Nη-branching ratio difference of the two lowest mass J^P=1/2⁻-resonances significantly.

Please use this url to cite or link to this publication: https://lup.lub.lu.se/record/e5c35aec-3f59-410a-84cf-f0f6b5cbf926

author

Müller, J. ; Hartmann, J. ; Grüner, M. ; Afzal, F. ; Anisovich, A. V. ; Bantes, B. ; Bayadilov, D. ; Beck, R. ; Becker, M. ^LU and Beloglazov, Y. , et al. (More)

Müller, J. ; Hartmann, J. ; Grüner, M. ; Afzal, F. ; Anisovich, A. V. ; Bantes, B. ; Bayadilov, D. ; Beck, R. ; Becker, M. ^LU ; Beloglazov, Y. ; Berlin, A. ; Bichow, M. ; Böse, S. ; Brinkmann, K. T. ; Challand, T. ; Crede, V. ; Dietz, F. ; Dieterle, M. ; Drexler, P. ; Dutz, H. ; Eberhardt, H. ; Elsner, D. ; Ewald, R. ; Fornet-Ponse, K. ; Friedrich, S. ; Frommberger, F. ; Funke, C. ; Gottschall, M. ; Gridnev, A. ; Goertz, S. ; Gutz, E. ; Hammann, C. ; Hannen, V. ; Hannappel, J. ; Herick, J. ; Hillert, W. ; Hoffmeister, P. ; Honisch, C. ; Jahn, O. ; Jude, T. ; Jaegle, I. ; Käser, A. ; Kaiser, D. ; Lang, M. ^LU ; Messi, F. ^LU

; Roth, B. ^LU ; Thiel, A. ^LU ; Walther, D. ^LU ; Wendel, C. ^LU and Wilson, A. ^LU (Less)

author collaboration

CBELSA/TAPS Collaboration

publishing date

2020-04-10

type

Contribution to journal

publication status

published

keywords

Baryon spectroscopy, Meson photoproduction, Polarization observables

in

Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics

volume

803

article number

135323

publisher

Elsevier

external identifiers

scopus:85082133704

ISSN

0370-2693

DOI

10.1016/j.physletb.2020.135323

language

English

LU publication?

no

id

e5c35aec-3f59-410a-84cf-f0f6b5cbf926

date added to LUP

2020-03-30 15:47:12

date last changed

2022-04-18 21:24:18

@article{e5c35aec-3f59-410a-84cf-f0f6b5cbf926,
  abstract     = {{<p>The polarization observables T,E,P,H, and G in photoproduction of η mesons off protons are measured for photon energies from threshold to W=2400 MeV (T), 2280 MeV (E), 1620 MeV (P,H), or 1820 MeV (G), covering nearly the full solid angle. The data are compared to predictions from the SAID, MAID, JüBo, and BnGa partial-wave analyses. A refit within the BnGa approach including further data yields precise branching ratios for the Nη decay of nucleon resonances. A Nη-branching ratio of 0.33±0.04 for N(1650)1/2<sup>−</sup> is found, which reduces the large and controversially discussed Nη-branching ratio difference of the two lowest mass J<sup>P</sup>=1/2<sup>−</sup>-resonances significantly.</p>}},
  author       = {{Müller, J. and Hartmann, J. and Grüner, M. and Afzal, F. and Anisovich, A. V. and Bantes, B. and Bayadilov, D. and Beck, R. and Becker, M. and Beloglazov, Y. and Berlin, A. and Bichow, M. and Böse, S. and Brinkmann, K. T. and Challand, T. and Crede, V. and Dietz, F. and Dieterle, M. and Drexler, P. and Dutz, H. and Eberhardt, H. and Elsner, D. and Ewald, R. and Fornet-Ponse, K. and Friedrich, S. and Frommberger, F. and Funke, C. and Gottschall, M. and Gridnev, A. and Goertz, S. and Gutz, E. and Hammann, C. and Hannen, V. and Hannappel, J. and Herick, J. and Hillert, W. and Hoffmeister, P. and Honisch, C. and Jahn, O. and Jude, T. and Jaegle, I. and Käser, A. and Kaiser, D. and Lang, M. and Messi, F. and Roth, B. and Thiel, A. and Walther, D. and Wendel, C. and Wilson, A.}},
  issn         = {{0370-2693}},
  keywords     = {{Baryon spectroscopy; Meson photoproduction; Polarization observables}},
  language     = {{eng}},
  month        = {{04}},
  publisher    = {{Elsevier}},
  series       = {{Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics}},
  title        = {{New data on γ→p→→ηp with polarized photons and protons and their implications for N<sup>⁎</sup> → Nη decays}},
  url          = {{http://dx.doi.org/10.1016/j.physletb.2020.135323}},
  doi          = {{10.1016/j.physletb.2020.135323}},
  volume       = {{803}},
  year         = {{2020}},
}

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New data on γ→p→→ηp with polarized photons and protons and their implications for N^⁎ → Nη decays