Measurement of the polarization of the Ξ 0 (over(Ξ 0, -)) hyperon beam by the NA48/1 experiment

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.; Panzer Steindel, B.; Rubin, P.; Wahl, H.; Goudzovski, E.; Hristov, P.; Kekelidze, V.; Litov, L.; Madigozhin, D.; Molokanova, N.; Potrebenikov, Y. U.; Stoynev, S.; Zinchenko, A.; Monnier, E.; Swallow, E.; Winston, R.; Sacco, R.; Walker, A.; Baldini, W.; Gianoli, A.; Dalpiaz, P.; Frabetti, P. L.; Martini, M.; Petrucci, F.; Savrié, M.; Scarpa, M.; Calvetti, M.; Collazuol, G.; Iacopini, E.; Ruggiero, G.; Bizzeti, Andrea; Lenti, M.; Veltri, M.; Behler, M.; Eppard, K.; Eppard, M.; Hirstius, A.; Kleinknecht, K.; Koch, U.; Marouelli, P.; Masetti, L.; Moosbrugger, U.; Morales Morales, C.; Peters, A.; Wanke, R.; Winhart, A.; Dabrowski, A.; Fonseca Martin, T.; Velasco, M.; Cenci, P.; Lubrano, P.; Pepe, M.; Anzivino, G.; Imbergamo, E.; Lamanna, G.; Michetti, A.; Nappi, A.; Petrucci, M. C.; Piccini, M.; Valdata, M.; Cerri, C.; Fantechi, R.; Costantini, F.; Fiorini 19, L.; Giudici, S.; Pierazzini, G.; Sozzi, M.; Mannelli, I.; Cheshkov, C.; Cheze, J. B.; De Beer, M.; Debu, P.; Gouge, G.; Marel, G.; Mazzucato, E.; Peyaud, B.; Vallage, B.; Holder, M.; Maier, A.; Ziolkowski, M.; Biino, C.; Cartiglia, N.; Marchetto, F.; Pastrone, N.; Clemencic, M.; Goy Lopez, S.; Menichetti, E.; Wislicki, W.; Dibon, H.; Jeitler, M.; Markytan, M.; Neuhofer, G.; Widhalm, L.

doi:10.1016/j.physletb.2009.10.054

A total of 368 415 Xi0->Lambda pi0 and 31 171 anti-Xi0-> anti-Lambda pi0 were selected from data recorded in the NA48/1 experiment during 2002 data taking. From this sample, the polarization of Xi0 and anti-Xi0 hyperons was measured to be P(Xi0) = -0.102 +-0.012(stat) +-0.008(syst) and P(anti-Xi0) = -0.01 +-0.04(stat) +-0.008(syst).The dependence of P(Xi0) on the Xi0 transverse momentum with respect to the primary proton beam is also presented. With the same data sample, the ratio of Xi0 and anti-Xi0 fluxes in proton collisions at 400 GeV/c on a beryllium target was measured.

Measurement of the polarization of the Ξ 0 (over(Ξ 0, -)) hyperon beam by the NA48/1 experiment / J. R., B., G. E., K., C., L., D. J., M., M., P., M. W., S., S. A., W., R., A., G., B., A., C., D., C., N., D., V., F., L., G., A., G., P., G., W., K., I., M., A., N., B., P.S., et al.. - In: PHYSICS LETTERS. SECTION B. - ISSN 0370-2693. - STAMPA. - 681:5(2009), pp. 406-412. [10.1016/j.physletb.2009.10.054]