%0 Journal Article
%@ 0031-9007
%A Mersmann, T
%A Khoukaz, A
%A Buscher, M
%A Chiladze, D
%A Dymov, S
%A Hartmann, M
%A Hejny, V
%A Kacharava, A
%A Keshelashvili, I
%A Kulessa, P
%A Maeda, Y
%A Mielke, M
%A Mikirtychiants, S
%A Ohm, H
%A Papenbrock, M
%A Prasuhn, D
%A Rathmann, F
%A Rausmann, T
%A Schleichert, R
%A Serdyuk, V
%A Stein, HJ
%A Stroher, H
%A Taschner, A
%A Valdau, Y
%A Wilkin, C
%A Wronska, A
%D 2007
%F discovery:154172
%I AMERICAN PHYSICAL SOC
%J PHYS REV LETT
%K NEAR-THRESHOLD, ETA, SCATTERING
%N 24
%T Precision study of the eta He-3 system using the dp -> He-3 eta reaction
%U https://discovery.ucl.ac.uk/id/eprint/154172/
%V 98
%X The differential and total cross sections for the dp -> He-3 eta reaction have been measured in a high precision high statistics COSY-ANKE experiment near threshold using a continuous beam energy ramp up to an excess energy Q of 11.3 MeV with essentially 100% acceptance. The kinematics allowed the mean value of Q to be determined to about 9 keV. Evidence is found for the effects of higher partial waves for Q greater than or similar to 4 MeV. The very rapid rise of the total cross section to its maximum value within 0.5 MeV of threshold implies a very large eta He-3 scattering length and hence the presence of a quasibound state extremely close to threshold.
%Z © 2007 The American Physical Society