Cargando…

Measurement of spin-transfer observables in pp to $\Lambda \Lambda$ at 1.637 GeV/c

Spin-transfer observables for pp to Lambda Lambda have been measured using a transversely polarized frozen-spin target and a beam momentum of 1.637 GeV/c. Current models of the reaction near threshold are in good agreement with existing measurements performed with unpolarized particles in the initia...

Descripción completa

Detalles Bibliográficos
Autores principales: Bassalleck, B., Berdoz, A., Bradtke, C., Broders, R., Bunker, B., Dennert, H., Dutz, H., Eilerts, S., Eyrich, W., Fields, D., Fischer, H., Franklin, G., Franz, J., Gehring, R., Geyer, R., Goertz, S., Harmsen, J., Hauffe, J., Heinsius, F.H., Hertzog, D., Johansson, T., Jones, T., Khaustov, P., Kilian, K., Kingsberry, P., Kriegler, E., Lowe, J., Meier, A., Metzger, A., Meyer, C.A., Meyer, W., Moosburger, M., Oelert, W., Paschke, K.D., Pluckthun, M., Pomp, S., Quinn, B., Radtke, E., Reicherz, G., Rohrich, K., Sachs, K., Schmitt, H., Schoch, B., Sefzick, T., Stinzing, F., Stotzer, R., Tayloe, R., Wirth, St.
Lenguaje:eng
Publicado: 2002
Materias:
Acceso en línea:https://dx.doi.org/10.1103/PhysRevLett.89.212302
http://cds.cern.ch/record/623650
Descripción
Sumario:Spin-transfer observables for pp to Lambda Lambda have been measured using a transversely polarized frozen-spin target and a beam momentum of 1.637 GeV/c. Current models of the reaction near threshold are in good agreement with existing measurements performed with unpolarized particles in the initial state but produce conflicting predictions for the spin-transfer observables D/sub nn/ and K/sub nn/ (the normal-to-normal depolarization and polarization transfer), which are measurable only with polarized target or beam. Measurements of D/sub nn/ and K/sub nn/ presented here are found to be in disagreement with predictions from these models. (21 refs).