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Asymmetry measurements for π0 and π+ photoproduction by linearly polarized γ-rays in the energy range (400÷900) MeV

Измерение асимметрии для фоторождения π0 и π+ линейно поляризованными гамма-лучами в области энергий (400÷900) МэВ

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Il Nuovo Cimento A (1971-1996)

Summary

The asymmetry ratioA = (σ⊥ -σ∥)/(σ⊥ +σ∥) has been measured by means of linearly polarized γ-rays for π0 and π+ photoproduction. For the reaction γ + p → n + π+, measurements were taken for θc.m. = 135° at γ-ray energies ranging from 390 to 909 MeV. For the reaction γ + p → p + π0, measurements were taken for θc.m. = 60° and 90° at γ-ray energies ranging from 426 to 918 Mev.

Riassunto

Si è misurato il rapporto di asimmetriaA = (σ⊥ -σ∥)/(σ⊥ +σ∥) per mezzo di raggi γ polarizzati linearmente per fotoproduzione di π0 e π+. Per la reazione γ + p → n + π+ le misure sono state eseguite per θc.m. = 135° ad energie dei raggi γ da 390 a 909 MeV. Per la reazione γ + p → n + π+ le misure sono state eseguite per θc.m. = 60° e 90° ad energie dei raggi gamma da 426 a 918 MeV.

Резюме

Используя линейно поляризованные гамма-лучи для фоторождения π0 и π+, было измено отношение асимметрииA = (σ⊥ -σ∥)/(σ⊥ +σ∥). Для реакции γ + p → n + π+ измерения проводились для θц.м. = 135° при энергиях гамма-лучей в области от 390 до 909 МэВ. Для реакции γ + p → p + π0 измерения проводились для θц.м. = 60° и 90° при энергиях гамма-лучеи в области от 426 до 918 Мэв.

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Authors and Affiliations

  1. High Energy Physics Laboratory, Stanford University, Stanford, Cal.

    R. W. Zdarko

  2. Department of Physics, Naval Postgraduate School, Monterey, Cal.

    E. B. Dally

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  1. R. W. Zdarko
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  2. E. B. Dally
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To speed up publication, the authors of this paper have agreed to not receive the proofs for correction.

Research supported in part by the joint program of the U.S. Office of Naval Research and the U.S. Air Force Office of Scientific Research.

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Zdarko, R.W., Dally, E.B. Asymmetry measurements for π0 and π+ photoproduction by linearly polarized γ-rays in the energy range (400÷900) MeV. Nuov Cim A 10, 10–18 (1972). https://doi.org/10.1007/BF02895969

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