TY  - JOUR
ID  - discovery154172
UR  - http://dx.doi.org/10.1103/PhysRevLett.98.242301
IS  - 24
N2  - 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.
AV  - public
SN  - 0031-9007
Y1  - 2007/06/15/
TI  - Precision study of the eta He-3 system using the dp -> He-3 eta reaction
JF  - PHYS REV LETT
PB  - AMERICAN PHYSICAL SOC
A1  - Mersmann, T
A1  - Khoukaz, A
A1  - Buscher, M
A1  - Chiladze, D
A1  - Dymov, S
A1  - Hartmann, M
A1  - Hejny, V
A1  - Kacharava, A
A1  - Keshelashvili, I
A1  - Kulessa, P
A1  - Maeda, Y
A1  - Mielke, M
A1  - Mikirtychiants, S
A1  - Ohm, H
A1  - Papenbrock, M
A1  - Prasuhn, D
A1  - Rathmann, F
A1  - Rausmann, T
A1  - Schleichert, R
A1  - Serdyuk, V
A1  - Stein, HJ
A1  - Stroher, H
A1  - Taschner, A
A1  - Valdau, Y
A1  - Wilkin, C
A1  - Wronska, A
KW  - NEAR-THRESHOLD
KW  -  ETA
KW  -  SCATTERING
VL  - 98
N1  - © 2007 The American Physical Society
ER  -