Spin Transfer in Exclusive <font face=symbol>L</font> Production from pp Collisions at 3.67 GeV/c

Balestra, F.; Bedfer, Y.; Bertini, R.; Bland, L. C.; Brenschede, A.; Brochard, F.; Bussa, M. P.; Chalyshev, V.; Seonho, Choi; Debowski, M.; Dzemidzic, M.; Faivre, J.-Cl.; Falomkin, I. V.; Fava, L.; Ferrero, L.; Foryciarz, J.; Frolov, V.; Garfagnini, R.; Gill, D.; Grasso, A.; Heinz, S.; Ivanov, V. V.; Jacobs, W. W.; Kühn, W.; Maggiora, A.; Maggiora, M.; Manara, A.; Panzieri, D.; Pfaff, H.-W.; Piragino, G.; Pontecorvo, G. B.; Popov, A.; Ritman, J.; Salabura, P.; Tosello, F.; Vigdor, S. E.; Zosi, G.

Spin Transfer in Exclusive L Production from pp Collisions at 3.67 GeV/c

Balestra, F.; Bedfer, Y.; Bertini, R.; Bland, L. C.; Brenschede, A.; Brochard, F.; Bussa, M. P.; Chalyshev, V.; Seonho, C.; Debowski, M.; Dzemidzic, M.; Faivre, J.-C.; Falomkin, I. V.; Fava, L.; Ferrero, L.; Foryciarz, J.; Frolov, V.; Garfagnini, R.; Gill, D.; Grasso, A.; Heinz, S.; Ivanov, V. V.; Jacobs, W. W.; Kühn, W.; Maggiora, A.; Maggiora, M.; Manara, A.; Panzieri, D.; Pfaff, H.-W.; Piragino, G.; Pontecorvo, G. B.; Popov, A.; Ritman, J.; Salabura, P.; Tosello, F.; Vigdor, S. E.; Zosi, G.

We report the first polarization transfer measurements for exclusive hyperon production reactions.
The normal spin transfer coefficient D_NN for
pp®pK⁺K^- L is large and negative for
forward L production at a beam momentum of 3.67GeV/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 L production at much higher energies.

Physical Review Letters 38 (1999) 1534

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