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Measurement of the polarization of the Ξ0 (over(Ξ0, -)) hyperon beam by the NA48/1 experiment

  • 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-Steindel
  • P. Rubin, H. Wahl, E. Goudzovski, P. Hristov, V. Kekelidze, L. Litov, D. Madigozhin, N. Molokanova, Yu 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

Research output: Contribution to journal › Article › peer-review

Abstract

A total of 368 415 Ξ0 → Λ π0 and 31 171 over(Ξ0, -) → over(Λ, -) π0 were selected from data recorded in the NA48/1 experiment during 2002 data taking. From this sample, the polarization of Ξ0 and over(Ξ0, -) hyperons was measured to be PΞ0 = - 0.102 ± 0.012 (stat) ± 0.008 (syst) and Pover(Ξ0, -) = - 0.01 ± 0.04 (stat) ± 0.008 (syst). The dependence of PΞ0 on the Ξ0 transverse momentum with respect to the primary proton beam is also presented. With the same data sample, the ratio of over(Ξ0, -) and Ξ0 fluxes in proton collisions at 400 GeV / c on a beryllium target was measured.

Original languageEnglish
Pages (from-to)406-412
Number of pages7
JournalPhysics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Volume681
Issue number5
DOIs
Publication statusPublished - 16 Nov 2009
Externally publishedYes

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