https://doi.org/10.1140/epja/i2008-10713-4
Regular Article - Experimental Physics
Measurement of beam-recoil observables Ox , Oz and target asymmetry T for the reaction
p → K+
1
Institut National Polytechnique de Grenoble, LPSC, Université Joseph Fourier Grenoble 1, CNRS/IN2P3, 53 avenue des Martyrs, 38026, Grenoble, France
2
Dipartimento di Fisica, Università di Roma “Tor Vergata”, via della Ricerca Scientifica 1, I-00133, Roma, Italy
3
Dipartimento di Fisica Sperimentale, Università di Torino, via P. Giuria, I-00125, Torino, Italy
4
Laboratori Nazionali di Frascati, INFN, via E. Fermi 40, I-00044, Frascati, Italy
5
Laboratori Nazionali del Sud, INFN, via Santa Sofia 44, I-95123, Catania, Italy
6
INFN - Sezione di Catania, via Santa Sofia 64, I-95123, Catania, Italy
7
INFN - Sezione di Genova, via Dodecanneso 33, I-16146, Genova, Italy
8
INFN - Sezione di Roma, piazzale Aldo Moro 2, I-00185, Roma, Italy
9
INFN - Sezione di Roma Tor Vergata, via della Ricerca Scientifica 1, I-00133, Roma, Italy
10
INFN - Sezione di Torino, I-10125, Torino, Italy
11
Istituto Superiore di Sanità, viale Regina Elena 299, I-00161, Roma, Italy
12
Dipartimento di Fisica ed Astronomia, Università di Catania, via Santa Sofia 64, I-95123, Catania, Italy
13
Institute for Nuclear Research, 117312, Moscow, Russia
14
IPNO, Université Paris-Sud 11, CNRS/IN2P3, 15 rue Georges Clémenceau, 91406, Orsay, France
15
Dipartimento di Fisica, Università di Messina, salita Sperone, I-98166, Messina, Italy
16
Kyungpook National University, 702-701, Daegu, Republic of Korea
* e-mail: lleres@lpsc.in2p3.fr
Received:
24
July
2008
Revised:
18
November
2008
Accepted:
2
January
2009
Published online:
2
February
2009
The double polarization (beam-recoil) observables and
have been measured for the reaction
p → K
+
from threshold production to
MeV. The data were obtained with the linearly polarized beam of the GRAAL facility. Values for the target asymmetry T could also be extracted despite the use of an unpolarized target. Analyses of our results by two isobar models tend to confirm the necessity to include new or poorly known resonances in the 1900MeV mass region.
PACS: 13.60.Le Meson production – / 13.88.+e Polarization in interactions and scattering – / 25.20.Lj Photoproduction reactions –
© SIF, Springer-Verlag Berlin Heidelberg, 2009