Elsevier

Nuclear Physics B

Volume 81, Issue 3, 11 November 1974, Pages 378-396
Nuclear Physics B

Photoproduction of πΔ(1236) from protons below 1.1 GeV

https://doi.org/10.1016/0550-3213(74)90239-9Get rights and content

Abstract

The π+ and π momentum spectrum of the reaction γp → ππN have been measured at lab angles 20°, 40°, 60° and 90° and photon energies 0.744, 0.844, 0.944 and 1.044 GeV with a magnetic spectrometer using the photon subtraction method. Both spectra show a peak corresponding to the production of the πΔ(1236) state. The analysis has been carried out with amplitudes for the quasi two-body process γp → πΔ(1236) and a phase-space background so as to reproduce both π+ and π spectra. The ratio of cross sections σ(γp → π+Δ0)/ (γp → π Δ++) is found to vary 0.0 to 1.8, depending on kinematical conditions.

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Cited by (0)

Department of Physics, Nagoya University, Nagoya.

∗∗

Department of Physics, Kyoto University, Kyoto.

Brookhaven National Laboratory, Upton, N.Y., USA.

§

National Laboratory for High Energy Physics, Oho-machi, Ibaraki-ken, Japan.

Department of Physics, Yale University, New Haven, C.T. and Brookhaven National Laboratory, Upton, N.Y., USA.

∗∗∗

Department of Physics, Hiroshima University, Hiroshima.

#

Institute for Nuclear Study, University of Tokyo, Tokyo.

Faculty of Education, Akita University, Akita, Japan.

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