CERN Accelerating science

Article
Title	Production of strange particles in antineutrino interactions at the CERN PS
Author(s)	Erriquez, O ; Allasia, D ; Bisi, V ; Bonetti, S ; Bonneaud, G ; Bullock, F W ; Cavalli, D ; Escoubés, B ; Fogli-Muciaccia, M T ; Franzinetti, Carlo ; Gamba, D ; Guyonnet, J L ; Halsteinslid, A ; Huss, D ; Jarlskog, C ; Jones, T W ; Marzari-Chiesa, A ; Michette, A G ; Myklebost, K ; Natali, S ; Nuzzo, S ; Paty, M ; Pullia, A ; Racca, C ; Riccati, L ; Riester, J L ; Rognebakke, A ; Rollier, M ; Romero, A ; Sacco, R ; Schäffer, M ; Skjeggestad, O ; Tvedt, B
Affiliation	(Istituto di Fisica, Univ di Bari, Bari, Italy)
Publication	1978
In:	Nucl. Phys. B 140 (1978) 123-40
DOI	10.1016/0550-3213(78)90316-4
Subject category	Particle Physics - Phenomenology
Abstract	The authors have studied neutral strange particle production in the bubble chamber Gargamelle filled with propane and exposed to antineutrinos from the CERN PS. Cross sections are presented for Lambda , Sigma /sup 0/ and K/sup 0/ production. Associated production reactions ( Delta S=0) have been observed in the charged and the neutral current channels. From 45 candidates for the quasi-elastic reaction nu p to mu /sup +/ Lambda , on bound and free protons, estimates of the axial transition form factor M/sub A/ have been made using the total cross section and the t distribution. The weighted average from the two methods is M/sub A/=862+or-190 MeV. From a subsample of 15 candidates for nu interactions on free protons in propane, with (28+or-6)% background from nu interactions on bound protons, M/sub A/=883+or-243 MeV is obtained. The polarization of the Lambda hyperons has been studied for the quasi-elastic reaction. (11 refs).

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