Measurement of Inverse Pion Photoproduction Near the<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msup><mml:mrow><mml:mrow><mml:msub><mml:mrow><mml:mi>P</mml:mi></mml:mrow><mml:mrow><mml:mn>33</mml:mn></mml:mrow></mml:msub></mml:mrow></mml:mrow><mml:mrow><mml:mn>0</mml:mn></mml:mrow></mml:msup></mml:mrow><mml:mn /><mml:mo>(</mml:mo><mml:mn>1236</mml:mn><mml:mo>)</mml:mo><mml:mn /></mml:math>Resonance

Berardo, Peter A.; Haddock, R. P.; Nefkens, B. M. K.; Verhey, Lynn; Zeller, M.; Parsons, A.S.L.; Truoel, P.

doi:10.1103/physrevlett.26.201

Phys. Rev. Lett.

1971

DOI: 10.1103/physrevlett.26.201

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Measurement of Inverse Pion Photoproduction Near theP330(1236)Resonance

Peter A. Berardo

R. P. Haddock

B. M. K. Nefkens

et al.

Abstract: The differential cross sections for 7r~ +p-~y+n at 40 o <0 y <150° at cm. total energies 1245 and 1337 MeV are presented. The results do not agree with predictions based on the AI ^ 1 rule for the electromagnetic current and fixed-£ dispersion relations. Our data can be fitted with the Sanda-Shaw model, in which the electromagnetic current contains an isotensor component. Our angular distribution at 1337 MeV agrees with the inverse reaction as deduced from yd work; however, there is some disagreement at 1245 M… Show more

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Cited by 35 publications

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“…Very recently, the first results of this process in the resonance region have been made at 360 MeV. 4 Although the model-independent test of Ref.…”

mentioning

confidence: 99%

C-Invariance Violation and the Isotensor Current

Sanda

Shaw

1971

Phys. Rev. Lett.

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Recently, 1 the authors discussed the question of whether there was an effect due to an isotensor electromagnetic current in the photoproduction of pions from nucleons in the region of the first resonance, and we concluded, using data on the process yn-^ir'p obtained from deuterium measurements, that there was indeed evidence for such a term, The deuterium measurements were taken seriously since two independent measurements 2 were consistent with each other, and also they were consistent with those deduced from the 7r"/7r + ratio wherever the latter data exist. 3 To make the conclusion definite, however, experimental study of Tr'p-^yn was suggested. Very recently, the first results of this process in the resonance region have been made at 360 MeV. 4 Although the model-independent test of Ref.(1) cannot be carried out without measurement over a range of energy, these results again indicate an isotensor term of about the same sign and magnitude as was suggested on the basis of the deuterium data. However, the actual differential cross section for the process, at least at angles greater than about 80°, does not agree at all well with its inverse reaction. Provided the data on yn-»ir~p are correctly deduced from the deuteri-13 M. A. Wahlig and M. I. Mannelli, Phys. Rev. 168, 1515). 14 P. Sonderegger et al. t Phys. Lett. 2£, 75 (1966). 15 A. V. Stirling^ al. t Phys. Rev. Lett. 14, 763 (1965). 16 The SU(3) singlet has been removed by the requirement that the physical

show abstract

“…Very recently, the first results of this process in the resonance region have been made at 360 MeV. 4 Although the model-independent test of Ref.…”

mentioning

confidence: 99%

C-Invariance Violation and the Isotensor Current

Sanda

Shaw

1971

Phys. Rev. Lett.

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show abstract

Chemistry and Pharmacology of Heparin

Ehrlich

Stivala

1973

Journal of Pharmaceutical Sciences

121

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Photoproduction of π−-mesons on deuteron monochromatic photons in the first resonance region

et al. 1973

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Measurement of Inverse Pion Photoproduction Near theP330(1236)Resonance

Cited by 35 publications

References 22 publications

C-Invariance Violation and the Isotensor Current

C-Invariance Violation and the Isotensor Current

Chemistry and Pharmacology of Heparin

Photoproduction of π−-mesons on deuteron monochromatic photons in the first resonance region

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