2007/12/30 by Yu. N. Uzikov · 3 citations
Physics and Astronomy · #Atomic and Subatomic Physics Research #Quantum Chromodynamics and Particle Interactions #Quantum, superfluid, helium dynamics #nucl-th
paper · pdf · doi:10.1016/j.nuclphysa.2007.12.010
published as Nucl.Phys.A801:114-128,2008 · 16 pages, Latex. Submitted to Nuclear Physics A
arxiv created 2007/12/30 · openalex publication_date 2008/01/14 · arxiv updated 2009/12/01 · openalex created_date 2019/11/22 · openalex updated_date 2026/07/29
A formalism for spin observables of the reaction pd→ ~3Heη is derived in a model independent way. The general case with a full set of six independent spin amplitudes is studied. Furthermore, approximations by five and four spin amplitudes are investigated in the near threshold region. This region is of great interest to search for a quasi-bound 3He-η state, in particular, by measurement of energy dependence of relative phases of s- and p-wave amplitudes. Complete polarization experiments, allowing determination of spin amplitudes, are analyzed. It is shown that measurement of only analyzing powers and spin correlation coefficients hardly allows one to separate the s- and p-wave amplitudes, but additional measurement of polarization transfer coefficients simplifies this problem. Specific observables, given by products of one s- and one p-wave amplitudes, are found. Measurement of these observables will provide new independent information on the 3He-η pole position.