ON NONLEPTONIC DECAYS OF THE Λ0-HYPERON IN THE EFFECTIVE QUARK MODEL WITH CHIRAL U(3)×U(3) SYMMETRY

Author:

YA. BERDNIKOV A.1,BERDNIKOV YA. A.1,FABER M.2,IVANOV A. N.21,IVANOVA V. A.1,NIKITCHENKO A. V.1,TROITSKAYA N. I.1

Affiliation:

1. State Polytechnic University, Polytechnicheskaya 29, 195251, St Petersburg, Russian Federation, Russia

2. Atominstitut der Österreichischen Universitäten, Technische Universität Wien, Wiedner Hauptstrasse 8-10, A-1040 Wien, Austria

Abstract

Within the effective quark model with chiral U (3) × U (3) symmetry we calculate the S-wave and P-wave amplitudes and the partial widths of the nonleptonic decays of the Λ0-hyperon, Λ0 → pπ- and Λ0 → nπ0. The theoretical results agree well with the experimental data. The angular distributions of the decay rates in dependence on the polarizations of baryons are analyzed both in the laboratory frame and in the rest frame of the Λ0-hyperon.

Publisher

World Scientific Pub Co Pte Lt

Subject

Astronomy and Astrophysics,Nuclear and High Energy Physics,Atomic and Molecular Physics, and Optics

Reference38 articles.

1. A. J. Buras, Probing the Standard Model of Particle Interactions, Les Houches Summer School Proceedings 68, eds. R. Gupta (Elsevier, 1999) pp. 95–97, hep-ph/9806471.

2. Effective quark model with chiralU(3)×U(3)symmetry for baryon octet and decuplet

3. Λc+→p+K−+π+decay

4. Polarization properties of the charmed baryonΛc+in theΛc+→p+K−+π++π0decay

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