Measurement of vector-tensor spin-transfer observables for the reaction H($\vec p$,$\vec d$)$\pi^+$ between 580 and 1300 MeV - IN2P3 - Institut national de physique nucléaire et de physique des particules
Article Dans Une Revue Nuclear Physics A Année : 1999

Measurement of vector-tensor spin-transfer observables for the reaction H($\vec p$,$\vec d$)$\pi^+$ between 580 and 1300 MeV

E.J. Beise
  • Fonction : Auteur
E. Brash
  • Fonction : Auteur
H. Breuer
  • Fonction : Auteur
G. Collins
F. Duncan
  • Fonction : Auteur
J.E. Ducret
  • Fonction : Auteur
M. Garcon
  • Fonction : Auteur
R. Gilman
  • Fonction : Auteur
C. Glashausser
  • Fonction : Auteur
V.P. Ladygine
  • Fonction : Auteur
J. Niskanen
  • Fonction : Auteur
P. Rutt
  • Fonction : Auteur
E. Tomasi-Gustafsson
  • Fonction : Auteur

Résumé

The three polarization tensor components of the deuteron produced in the H( p , d )π + reaction have been measured for the first time. The experiment was performed using a vertically polarized proton beam produced by the SATURNE accelerator. The deuteron polarization was measured with the POLDER polarimeter. The three polarizing powers t 20 00 , t 21 00 and t 22 00 and the three spin-transfer observables t 20 11 , t 22 11 and t 22 11 have been extracted at a proton kinetic energy of 580 MeV over a wide angular range and at two fixed center-of-mass angles, 132° and 151°, between 800 and 1300 MeV. The six observables, calculated in the C.M. helicity frame, have been compared with predictions of the most refined partial-wave analyses and also with the predictions of a theoretical coupled-channel model which includes the NN-NΔ transition. The comparison between the data and the theory/partial-wave analyses shows some discrepancies which get worse with increasing proton energy. Adding these data to the world database should improve significantly future partial-wave analyses. The A y 0 analyzing power has also been measured over the same kinematical range. The partial-wave analysis predictions are in good agreement with this observable. (Elsevier)

Dates et versions

in2p3-00002928 , version 1 (24-09-1999)

Identifiants

Citer

C. Furget, J. Goy, S. Kox, J.S. Real, J. Arvieux, et al.. Measurement of vector-tensor spin-transfer observables for the reaction H($\vec p$,$\vec d$)$\pi^+$ between 580 and 1300 MeV. Nuclear Physics A, 1999, 655, pp.495-521. ⟨10.1016/S0375-9474(99)00302-4⟩. ⟨in2p3-00002928⟩
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