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Measurement of the Lambda polarization in nu(mu) charged current interactions in the NOMAD experiment

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Measurement of the Lambda polarization in nu(mu) charged current interactions in the NOMAD experiment

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dc.contributor.author NOMAD Collaboration
dc.contributor.author Astier, P.
dc.contributor.author Cervera Villanueva, Anselmo
dc.contributor.author Gómez Cadenas, Juan José
dc.date.accessioned 2015-12-21T10:16:41Z
dc.date.available 2015-12-21T10:16:41Z
dc.date.issued 2000
dc.identifier.citation NOMAD Collaboration Astier, P. Cervera Villanueva, Anselmo Gómez Cadenas, Juan José 2000 Measurement of the Lambda polarization in nu(mu) charged current interactions in the NOMAD experiment Nuclear Physics B 588 1-2 3 36
dc.identifier.uri http://hdl.handle.net/10550/49649
dc.description.abstract The Lambda polarization in upsilon (mu) charged current interactions has been measured in the NOMAD experiment. The event sample (8087 reconstructed Lambda 's) is more than an order of magnitude larger than that of previous bubble chamber experiments, while the quality of event reconstruction is comparable. We observe negative polarization along the W-boson direction which is enhanced in the target fragmentation region: P-x(x(F) 0) = -0.09 +/- 0.06(stat) +/- 0.03(sys). These results provide a test of different models describing the nucleon spin composition and the spin transfer mechanisms. A significant transverse polarization tin the direction orthogonal to the Lambda production plane! has been observed for the first time in a neutrino experiment: P-y = -0.22 +/- 0.03(stat) +/- 0.01(sys). The dependence of the absolute value of P-y on the Lambda transverse momentum with respect to the hadronic jet direction is in qualitative agreement with the resuits from unpolarized hadron-hadron experiments.
dc.language.iso eng
dc.relation.ispartof Nuclear Physics B, 2000, vol. 588, num. 1-2, p. 3-36
dc.subject Física
dc.title Measurement of the Lambda polarization in nu(mu) charged current interactions in the NOMAD experiment
dc.type journal article es_ES
dc.date.updated 2015-12-21T10:16:41Z
dc.identifier.doi 10.1016/S0550-3213(00)00503-4
dc.identifier.idgrec 069912
dc.rights.accessRights open access es_ES

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