Absence of spin dependence in the final state interaction of the (d)over-barp -%26gt; He-3 eta reaction

作者：Papenbrock M^*; Barsov S; Burmeister I; Chiladze D; Dymov S; Fritzsch C; Gebel R; Goslawski P; Hartmann M; Kacharava A; Keshelashvili I; Khoukaz A; Kulessa P; Kulikov A; Lorentz B; Mchedlishvili D; Mersmann T; Merzliakov S; Mielke M; Mikirtychiants S; Ohm H; Prasuhn D; Rathmann F; Rausmann T; Serdyuk V; Stroeher H; Taeschner A; Trusov S; Valdau Yu; Wilkin C

来源：Physics Letters B, 2014, 734: 333-337.

DOI：10.1016/j.physletb.2014.05.079

• eta-mesic nuclei
• Polarisation effects
• Meson production

The deuteron tensor analysing power T-20 of the (d) over barp -%26gt; He-3 eta reaction has been measured at the COSY-ANKE facility in small steps in excess energy Qup to Q = 11MeV. Despite the square of the production amplitude varying by over a factor of five through this range, T-20 shows little energy dependence. This is evidence that the final state interaction causing the energy variation is not influenced by the spin configuration in the entrance channel. The weak angular dependence observed for T-20 provides useful insight into the amplitude structure near threshold.

• 出版日期2014-6-27