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Research PapersNo Access

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

A. YA. BERDNIKOV

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

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YA. A. BERDNIKOV

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

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

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

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

Corresponding author.

Permanent address: State Polytechnic University, Department of Nuclear Physics, 195251 St. Petersburg, Russian Federation.

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

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A. V. NIKITCHENKO

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

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N. I. TROITSKAYA

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

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https://doi.org/10.1142/S0217751X07036373Cited by:2 (Source: Crossref)

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.

Keywords:

PACS: 13.30.Eg, 13.75.Ev, 13.88.+e, 14.20.Jn

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Vol. 22, No. 10

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Received 22 May 2006

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