We report the first polarization transfer measurements for exclusive hyperon production reactions. The normal spin transfer coefficient D-NN for (p) over right arrow p --> pK(+)<(Lambda)over right arrow> is large and negative for forward Lambda production at a beam momentum of 3.67 GeV/c, a result qualitatively consistent with expectations for a mechanism dominated by kaon exchange and rescattering. The sign of D-NN is opposite to that observed in the fragmentation regime for inclusive Lambda production at much higher energies.

Spin transfer in exclusive Lambda production from (p)over-right-arrowp collisions at 3.67 GeV/c

BALESTRA, Ferruccio;BERTINI, Raimondo Pietro;BUSSA, Maria Pia;FAVA, Luciano;FERRERO, Livio;FROLOV, VLADIMIR;GRASSO, Antonino;MAGGIORA, MARCO;PANZIERI, Daniele;PIRAGINO, Guido;ZOSI, Gianfranco
1999

Abstract

We report the first polarization transfer measurements for exclusive hyperon production reactions. The normal spin transfer coefficient D-NN for (p) over right arrow p --> pK(+)<(Lambda)over right arrow> is large and negative for forward Lambda production at a beam momentum of 3.67 GeV/c, a result qualitatively consistent with expectations for a mechanism dominated by kaon exchange and rescattering. The sign of D-NN is opposite to that observed in the fragmentation regime for inclusive Lambda production at much higher energies.
83
1534
1537
HYPERON POLARIZATION; ASYMMETRY
Balestra F; Bedfer Y; Bertini R; Bland LC; Brenschede A; Brochard F; Bussa MP; Chalyshev V; Choi S; Debowski M; Dzemidzic M; Faivre JC; Falomkin IV; Fava L; Ferrero L; Foryciarz J; Frolov V; Garfagnini R; Gill D; Grasso A; Heinz S; Ivanov VV; Jacobs WW; Kuhn W; Maggiora A; Maggiora M; Manara A; Panzieri D; Pfaff HW; Piragino G; Pontecorvo GB; Popov A; Ritman J; Salabura P; Tosello F; Vigdor SE; Zosi G
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Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/2318/75079
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