Abstract
Near threshold photoproduction ofη-mesons from the proton has been measured at the MAMI accelerator with the TAPS spectrometer. The mass of theη-meson was deduced from the threshold energy forη-photoproduction. The result of m η =(547.12 ± 0.06 ± 0.25) MeV supports the low value of theη-mass reported from a dp →3Heη measurement at SATURNE in 1992. Theη-decay branching ratio Γ3π0/Γγγ was measured to be (0.832±0.005±0.012).
This is a preview of subscription content, log in via an institution to check access.
Similar content being viewed by others
References
M. Gell-Man, Phys. Rev. 125 (1962) 1067
A. Pevsner et al., Phys. Rev. Lett. 7 (1961) 421
P.L. Bastien et al., Phys. Rev. Lett. 8 (1962) 114
M. Aguilar-Benitez et al., Phys. Lett. B239 (1990) (Review of particle properties)
F. Plouin et al., Phys. Lett. B276 (1992) 526
K. Hikasa et al., Phys. Rev D45 (1992), (Rev. of particle properties)
R.J. Cence et al., Phys. Rev. Lett 19 (1967) 1393; S. Devons et al., Phys. Rev. D40 (1970) 1936; C. Baltay et al., Phys. Rev. Lett 19 (1967) 1495; B. Cox et al., Phys. Rev. Lett. 24 (1970) 534
L. Montanet et al., Phys. Rev. D50 (1994), (Rev. of particle properties)
D. Alde et al., Z. Phys. C25 (1984) 225
C. Amsler et al., Z. Phys. C58 (1993) 175
R. Preprost et al., Phys. Rev. Lett 18 (1967) 82, C. Bacci et al., Phys. Rev. Lett. 20 (1968) 573, B. Delcourt et al., Phys. Lett B29 (1969) 75
B. Krusche et. al., submitted to Phys. Rev. Lett.
M. Clajus et al., πN-Newsletter No. 7. ed. R.E. Cutkosky, G.Höhler, W. Kluge, B.M.K. Nefkens, Dec. 1992
H. Herminghaus, Proc. of Lin. Accel. Conf. (Albuquerque, USA, 1990).
I. Anthony et al., NIM A301 (1991) 230.
R. Novotny, IEEE Trans. on Nucl. Science 38 (1991) 379.
K. Herter, Diploma Thesis, Mainz (1992), KPH 04/92.
B. Krusche, Proc. of the II TAPS Workshop, Guardamar 1993, eds. J. Diaz, Y. Schutz, World Scientific 1994, p. 310.
R. Brun et al., GEANT3, Cern/DD/ee/84-1, 1986.
Author information
Authors and Affiliations
Additional information
This article was processed by the author using the LATEX style filepljour2 from Springer-Verlag.
Rights and permissions
About this article
Cite this article
Krusche, B., Ahrens, J., Anthony, I. et al. Mass and Γ3π0/Γγγ decay branching ratio of theη-meson from the p(γ, η)p reaction. Z. Physik A - Hadrons and Nuclei 351, 237–240 (1995). https://doi.org/10.1007/BF01290901
Received:
Issue Date:
DOI: https://doi.org/10.1007/BF01290901