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Near-threshold production of a 0(980) mesons in πN and NN collisions and a 0-f 0 mixing

  • Elementary Particles and Fields
  • Theory
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Abstract

We consider near-threshold a 0(980)-meson production in πN and NN collisions. An effective Lagrangian approach with one-pion exchange is applied to analyze different contributions to the cross section for different isospin channels. The Reggeon exchange mechanism is also evaluated for comparison. The results from πN reactions are used to calculate the contribution of the a 0 meson to the cross sections and invariant \(K\bar K\) mass distributions of the reactions \(pp \to pnK^ + \bar K^0 \) and pp → ppK + K −. It is found that the experimental observation of a +0 mesons in the reaction \(pp \to pnK^ + \bar K^0 \) is much more promising than the observation of a 00 mesons in the reaction pp → ppK + K −. Effects of isospin violation in the reactions pN → da 0, pd → 3He(3H)a 0, and dd → 4Hea 0, which are induced by a 0(980)-f 0(980) mixing, are also analyzed.

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Authors and Affiliations

  1. Institute of Theoretical and Experimental Physics, Bol'shaya Cheremushkinskaya ul. 25, Moscow, 117259, Russia

    L. A. Kondratyuk, E. L. Bratkovskaya, V. Yu. Grishina, M. Büscher, W. Cassing & H. Ströher

  2. Institut für Theoretische Physik, Universität Frankfurt, Germany

    E. L. Bratkovskaya

  3. Institute for Nuclear Research, Russian Academy of Sciences, pr. Shestidesyatiletiya Oktyabrya 7a, Moscow, 117312, Russia

    V. Yu. Grishina

  4. Institut für Kernphysik, Forschungszentrum Jülich, Germany

    M. Büscher & H. Ströher

  5. Institut für Theoretische Physik, Universität Giessen, Germany

    W. Cassing

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  1. L. A. Kondratyuk
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  3. V. Yu. Grishina
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Additional information

From Yadernaya Fizika, Vol. 66, No. 1, 2003, pp. 155–174.

Original English Text Copyright © 2003 by Kondratyuk, Bratkovskaya, Grishina, Büscher, Cassing, Ströher.

This article was submitted by the authors in English.

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Kondratyuk, L.A., Bratkovskaya, E.L., Grishina, V.Y. et al. Near-threshold production of a 0(980) mesons in πN and NN collisions and a 0-f 0 mixing. Phys. Atom. Nuclei 66, 152–171 (2003). https://doi.org/10.1134/1.1540670

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