Λ-hyperon production via the pp → pK+Λ reaction 2 MeV above threshold

Authors :: T. Sefzick
A. Khoukaz
A. Kozela
D. Grzonka
W. Oelert
M. Jochmann
T. Lister
Christoph Hanhart
A. Budzanowski
M. Sokolowski
R. Maier
K. Kilian
R. Santo
A. Strzałkowski
M. Köhler
L. Jarczyk
D. Prasuhn
Johann Haidenbauer
H. Dombrowski
C. Quentmeier
C. D. Goodman
U. Seddik
Magnus Wolke
P. Wüstner
G. Schepers
Jerzy Smyrski
Paweł Moskal
J. T. Balewski
Source :: Physics Letters B. 388:859-865
Publication Year :: 1996
Publisher :: Elsevier BV, 1996.
Abstract: The pp → pK+Λ reaction was measured at COSY with a proton beam momentum of 2.345 GeV/c, i.e. with an excess energy of 2 MeV above threshold. The total cross section was determined to be 8.2 ± 1.8 nb. The present data point close to the production threshold indicates, that existing phenomenological parametrizations of the total kaon production cross section are insufficient.