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Il Nuovo Cimento (1955-1965)

, Volume 23, Issue 4, pp 690–696 | Cite as

Angular dependence of polarization in p-p elastic scattering at 970 MeV

  • R. J. Homer
  • W. K. McFarlane
  • A. W. O’Dell
  • E. J. Sacharidis
  • G. H. Eaton
Article

Summary

The angular dependence of polarization in p-p elastic scattering has been measured at 970 MeV. The results agree qualitatively with measurements at 635 MeV and 1.7 GeV and indicate that a Gammel-Thaler type spin-orbit potential is unsatisfactory at these energies. A least squares fit to the data gave
$$\sigma (\theta )E(\theta ) = \sin \theta \cos \theta \{ (0.70 \pm .04)P_0 (\cos \theta ) + (1.56 \pm 0.12)P_2 (\cos \theta ) + (0.45 \pm 0.14)P_4 (\cos \theta )\} mb/sr$$
, where σ(θ) andE(θ) are the unpolarized differential cross section and the measured asymmetry as functions of θ(c.m.) respectively. The maximum observed polarization in p-p scattering is close to 40% at an angle of 48° (c.m.).

Riassunto

Si è mis urata a 970 MeV la dipendenza angolare della polarizzazione nello scattering elastico p-p. I risultati si accordano qualitativamente con le misure a 635 MeV e 1.7 GeV ed indicano che a queste energie un potenziale spin-orbita del tipo di Gammel-Thaler non è soddisfacente. Un adattamento col metodo dei minimi quadrati diede
$$\sigma (\theta )E(\theta ) = \sin \theta \cos \theta \{ (0.70 \pm .04)P_0 (\cos \theta ) + (1.56 \pm 0.12)P_2 (\cos \theta ) + (0.45 \pm 0.14)P_4 (\cos \theta )\} mb/sr$$
, in cui σ(θ) edE(θ) sono rispettivamente la sezione d’urto differenziale non polarizzata e l’asimmetria misurate in funzione di θ (s.c.m.). La massima polarizzazione osservata nello scattering p-p è prossima al 40% ad un angolo di 48° (s.c.m.).

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Copyright information

© Società Italiana di Fisica 1962

Authors and Affiliations

  • R. J. Homer
    • 1
  • W. K. McFarlane
    • 1
  • A. W. O’Dell
    • 1
  • E. J. Sacharidis
    • 1
  • G. H. Eaton
    • 1
  1. 1.Department of PhysicsUniversity of BirminghamBirmingham

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