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Il Nuovo Cimento A (1965-1970)

, Volume 53, Issue 1, pp 107–114 | Cite as

Low-energy theorem connecting weak-pion production and two-pion photo-production

  • P. Narayanaswamy
  • B. Renner
Article

Summary

\(({\mathcal{N}}*\pi )\) photo-production from nucleons is connected to the matrix elements of the weak axial current between nucleons and\({\mathcal{N}}*(1236)\) states as a low-energy theorem by current algebras. Using predictions for these matrix elements, partly again from current algebras, the threshold cross-section of\(\gamma {\mathcal{N}} \to \pi {\mathcal{N}} * \) is worked out, so providing a possible consistency test.

Keywords

Matrix Element Current Algebra Born Term Teorema Axial Form Factor 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

Теорема, связывающая слабое пионное рождение при низких энергиях с двух-пионным фоторождением

Резюме

\(({\mathcal{N}}*\pi )\)-\qF\qo\qt\qo\qr\qo\Qz\qd\ye\qn\qi\ye на нуклонах связывается с матричными элементами слабого аксиального тока между нуклонами и\({\mathcal{N}}*(1236)\) состояниями, как теорема при низких энергиях, посредством алгебр токов. Используя предсказания для этих матричных элементов, частично из алгебр токов, разрабатывается пороговое поперечное сечение\(\gamma {\mathcal{N}} \to \pi {\mathcal{N}} * \), обеспечивая возможную согласованную проверку.

Riassunto

Si collega la fotoproduzione di\(({\mathcal{N}}*\pi )\) da nucleoni con gli elementi di matrice della corrente assiale debole fra nucleoni e stati di\({\mathcal{N}}*(1236)\) come un teorema per le basse energie è collegato all'algebra delle correnti. Si ricava il limite di soglia della sezione d'urto per\(\gamma {\mathcal{N}} \to \pi {\mathcal{N}} * \) in base ad alcune previsioni su gli elementi di matrice, in parte ancora derivate dall'algebra delle correnti, formando così un possibile test di coerenza.

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Copyright information

© Società Italiana di Fisica 1968

Authors and Affiliations

  • P. Narayanaswamy
    • 1
  • B. Renner
    • 1
  1. 1.CERNGeneva

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