Measurement of the polarization of the Ξ 0 (over(Ξ 0, -)) 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-SteindelP. 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

Risultato della ricerca: Contributo su rivistaArticolo in rivistapeer review

Abstract

A total of 368 415 Ξ 0 → Λ π 0 and 31 171 over(Ξ 0, -) → over(Λ, -) π 0 were selected from data recorded in the NA48/1 experiment during 2002 data taking. From this sample, the polarization of Ξ 0 and over(Ξ 0, -) hyperons was measured to be P Ξ0 = - 0.102 ± 0.012 (stat) ± 0.008 (syst) and P over(Ξ0, -) = - 0.01 ± 0.04 (stat) ± 0.008 (syst). The dependence of P Ξ0 on the Ξ 0 transverse momentum with respect to the primary proton beam is also presented. With the same data sample, the ratio of over(Ξ 0, -) and Ξ 0 fluxes in proton collisions at 400 GeV / c on a beryllium target was measured.

Lingua originaleInglese
pagine (da-a)406-412
Numero di pagine7
RivistaPhysics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Volume681
Numero di pubblicazione5
DOI
Stato di pubblicazionePubblicato - 16 nov 2009
Pubblicato esternamente

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