The universal Ψ′/Ψ′ ratio as unambiguous signature for hard physics in nuclear reactions and in decays of beauty hadrons

L. Frankfurt, L. Gerland, M. Strikman, M. Zhalov

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5 Scopus citations

Abstract

We suggest the ratio of the Ψ″(3770)/Ψ′(3686) production cross sections as an unambiguous probe of the dominance of hard, point-like physics in charmonium production. If hard physics dominates the charmonium production the ratio: σ(Ψ″)/σ(Ψ′) ≈ Γ(Ψ″→1+1-)/Γ(Ψ ′→1+1-) ≈ 0.1 is independent of the process. We argue that since the dominant DD̄ decay mode of the Ψ″-meson can be detected with a high efficiency at the current facilities the effective counting rate for the Ψ″ production should be comparable to that of the Ψ′ and hence it could be observed at the B-factories. Even in hadron induced processes the ratio will not be changed significantly by final state interactions due to the similar mass and size of these two charmonium states. A possible exception are the charmonium state interactions with low energy particles - comovers - which are especially relevant for heavy ion collisions.

Original languageEnglish (US)
Pages (from-to)68-72
Number of pages5
JournalPhysics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Volume563
Issue number1-2
DOIs
StatePublished - Jun 19 2003

All Science Journal Classification (ASJC) codes

  • Nuclear and High Energy Physics

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