New precise measurements of the Ξ0→Λγ and Ξ0→Σ0γ decay asymmetries

J. R. Batley, G. E. Kalmus, C. Lazzeroni, D. J. Munday, M. Patel, M. W. Slater, S. A. Wotton, R. Arcidiacono, G. Bocquet, A. Ceccucci, D. Cundy, N. Doble, V. Falaleev, L. Gatignon, A. Gonidec, P. Grafström, W. Kubischta, I. Mikulec, A. Norton, B. Panzer-SteindelP. Rubin, H. Wahl, E. Goudzovski, P. Hristov, V. Kekelidze, L. Litov, D. Madigozhin, N. Molokanova, Y. Potrebenikov, S. Stoynev, A. Zinchenko, E. Monnier, E. Swallow, R. Winston, R. Sacco, A. Walker, W. Baldini, A. Gianoli, P. Dalpiaz, P. L. Frabetti, M. Martini, F. Petrucci, M. Savrié, M. Scarpa, M. Calvetti, G. Collazuol, E. Iacopini, G. Ruggiero, A. Bizzeti, M. Lenti, M. Veltri, M. Behler*, K. Eppard, M. Eppard, A. Hirstius, K. Kleinknecht, U. Koch, P. Marouelli, L. Masetti, U. Moosbrugger, C. Morales Morales, A. Peters, R. Wanke, A. Winhart, A. Dabrowski, T. Fonseca Martin, M. Velasco, P. Cenci, P. Lubrano, M. Pepe, G. Anzivino, E. Imbergamo, G. Lamanna, A. Michetti, A. Nappi, M. C. Petrucci, M. Piccini, M. Valdata, C. Cerri, R. Fantechi, F. Costantini, L. Fiorini, S. Giudici, G. Pierazzini, M. Sozzi, I. Mannelli, C. Cheshkov, J. B. Cheze, M. De Beer, P. Debu, G. Gouge, G. Marel, E. Mazzucato, B. Peyaud, B. Vallage, M. Holder, A. Maier, M. Ziolkowski, C. Biino, N. Cartiglia, F. Marchetto, N. Pastrone, M. Clemencic, S. Goy Lopez, E. Menichetti, W. Wislicki, H. Dibon, M. Jeitler, M. Markytan, G. Neuhofer, L. Widhalm

*Corresponding author for this work

Research output: Contribution to journalArticle

4 Scopus citations

Abstract

The decay asymmetries of the weak radiative hyperon decays Ξ0→Λγ and Ξ0→Σ0γ have been measured with high precision using data of the NA48/1 experiment at CERN. From about 52 000 Ξ0→Λγ and 15 000 Ξ0→Σ0γ decays, we obtain for the decay asymmetries αΞ0→Λγ=-0.704±0.019stat±0.064syst and αΞ0→Σ0γ=-0.729±0.030stat±0.076syst, respectively. These results are in good agreement with previous experiments, but more precise.

Original languageEnglish (US)
Pages (from-to)241-248
Number of pages8
JournalPhysics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Volume693
Issue number3
DOIs
StatePublished - Oct 2010

Keywords

  • Decay asymmetry
  • Hyperon

ASJC Scopus subject areas

  • Nuclear and High Energy Physics

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    Batley, J. R., Kalmus, G. E., Lazzeroni, C., Munday, D. J., Patel, M., Slater, M. W., Wotton, S. A., Arcidiacono, R., Bocquet, G., Ceccucci, A., Cundy, D., Doble, N., Falaleev, V., Gatignon, L., Gonidec, A., Grafström, P., Kubischta, W., Mikulec, I., Norton, A., ... Widhalm, L. (2010). New precise measurements of the Ξ0→Λγ and Ξ0→Σ0γ decay asymmetries. Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, 693(3), 241-248. https://doi.org/10.1016/j.physletb.2010.08.046