Polarization relations in charge and hypercharge exchange reactions

Abstract

Relations between polarizations in charge and hyperchange exchange reactions are derived. The idea is that K ∗(890) and K ∗∗(1400) exchange, including unspecified absorptive corrections, are related to ϱ and A 2 exchanges by SU(3) octet symmetry, with a scale factor to represent symmetry breaking between the ϱ− A 2 and the K ∗−K ∗∗ trajectories. This hypothesis is consistent with the present data on K N → πΣ(πΛ) and πN → K Σ(K Λ). It leads to simple relations between the polarized cross sections P d σ/d t, relating the above reactions to K − p → K o n , K +n → K op, π −p → π on, π −p → ν on. Predictions are made, on this basis, for polarization in K −p → K on, K +n → K op and π −p → ν on at 4 GeV/ c and for K − p → K o n at 7 GeV/ c. Finally, some supplementary conjectures lead to predictions about polarization in baryon-baryon and baryon-anti-baryon reactions, np → pn, p p → n n , p p → ΛΛ , etc., and also in K L op → K S op regeneration.