Ratio between two Λ andΛ¯production mechanisms in p scattering

Abstract

We consider Λ andΛ production in a wide range of proton scattering experiments. The produced Λ andΛ may or may not contain a diquark remnant of the beam proton. The ratio of these two production mechanisms is found to be a simple universal function r = [κ/(yp − y)] i of the rapidity difference yp − y of the beam proton and the produced Λ orΛ, valid over four orders of magnitude, from r ≈ 0.01 to r ≈ 100, with κ = 2.86 ± 0.03 ± 0.07, and i = 4.39 ± 0.06 ± 0.15.

Part I: Heavy baryon forward-backward asymmetries in p ̄ p collisions. Part II: Confirmation of the exotic state X ( 5568 ) → B 0 s π ± in p ̄ p collisions.

“…We conclude that a simple two component Λ production model (central production β and forward production α) adequately represents all data, see Fig. 3 [5]. At small rapidity loss, the presence of the α component depends on having a shared (di)quark between the outgoing baryon and the parent proton.…”

“…Forward-backward asymmetries, and X(5568) B. Hoeneisen Figure 3: Left: Two Λ andΛ production mechanisms: "α" is forward, and "β " is central and symmetric in rapidity y. Right: Their ratio r ≡ α/β is a simple and universal function of "rapidity loss" ∆y = y p − y [5].…”