Polarisation Effect of ρ Produced in \( \bar pp \) Interactions at 5.7, 12 and 22.4 GeV/c

Alma Ata-Dubna-Helsinki-Kosice-Liverpool Moscow-Prague-Tbilisi collaboration
  • I. Herynek
Conference paper
Part of the Acta Physica Austriaca book series (FEWBODY, volume 27/1985)


The ρ meson spin alignment is studied in \( \bar pp \) interactions at 22.4 GeV/c and in the reaction \( \bar pp \to 2\pi ^ + 2\pi ^ - \) + neutrals at 5.7 GeV/c. An essential ρO meson spin alignment is observed. The values of the ρT OO element of the meson spin density matrix in the transversity frame are equal to 0.56±0.07, 0.53±0.05 and 0.54±0.04 at the above mentioned interactions, respectively. The value ρT OO = 0.64±0.06 for ρ± from the channel \( \bar pp \to 2\pi ^ + 2\pi ^ - \pi ^0 \) at 5.7 GeV/c was obtained. An increase of ρT OO with transverse momentum is obtained.


Transverse Momentum Spin Alignment Annihilation Channel Decay Angular Distribution Meson Spin 
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Copyright information

© Springer-Verlag 1985

Authors and Affiliations

  • I. Herynek
    • 1
  1. 1.Institute of PhysicsCzechoslovak Academy of SciencesPraha 8Czech Republic

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