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Formation of a narrow baryon resonance with positive strangeness in K + collisions with Xe nuclei

  • Elementary Particles and Fields
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Abstract

The data on the charge-exchange reaction K +Xe → K 0 pXe′, obtained with the bubble chamber DIANA, are reanalyzed using increased statistics and updated selections. Our previous evidence for formation of a narrow pK 0 resonance with mass near 1538 MeV is confirmed. The statistical significance of the signal reaches some 8 (6) standard deviations when estimated as \( {S \mathord{\left/ {\vphantom {S {\sqrt B \left( {{S \mathord{\left/ {\vphantom {S {\sqrt {B + S} }}} \right. \kern-\nulldelimiterspace} {\sqrt {B + S} }}} \right)}}} \right. \kern-\nulldelimiterspace} {\sqrt B \left( {{S \mathord{\left/ {\vphantom {S {\sqrt {B + S} }}} \right. \kern-\nulldelimiterspace} {\sqrt {B + S} }}} \right)}} \). The mass and intrinsic width of the Θ+ baryon are measured as m = 1538 ± 2 MeV and Γ = 0.39 ± 0.10 MeV.

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Authors and Affiliations

  1. Institute of Theoretical and Experimental Physics, Moscow, Russia

    V. V. Barmin, A. E. Asratyan, V. S. Borisov, G. V. Davidenko, A. G. Dolgolenko, M. A. Kubantsev, I. F. Larin, V. A. Matveev, V. A. Shebanov, N. N. Shishov, L. I. Sokolov, G. K. Tumanov & V. S. Verebryusov

  2. Laboratori Nazionali di Frascati dell’ INFN, Paris, Italy

    C. Curceanu & C. Guaraldo

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  1. V. V. Barmin
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  2. A. E. Asratyan
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  3. V. S. Borisov
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  4. C. Curceanu
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  5. G. V. Davidenko
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  6. A. G. Dolgolenko
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  7. C. Guaraldo
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  8. M. A. Kubantsev
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  9. I. F. Larin
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  10. V. A. Matveev
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  11. V. A. Shebanov
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  12. N. N. Shishov
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  13. L. I. Sokolov
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  14. G. K. Tumanov
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  15. V. S. Verebryusov
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DIANA Collaboration

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Correspondence to A. G. Dolgolenko.

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The text was submitted by the authors in English.

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Barmin, V.V., Asratyan, A.E., Borisov, V.S. et al. Formation of a narrow baryon resonance with positive strangeness in K + collisions with Xe nuclei. Phys. Atom. Nuclei 73, 1168–1175 (2010). https://doi.org/10.1134/S1063778810070100

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  • DOI: https://doi.org/10.1134/S1063778810070100

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