Constituent counting rule for exclusive production of heavy quarkoniumlike exotic resonance and a light hadron

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Abstract

The exclusive processes are considered, where a pointlike source of heavy quark-antiquark pairs QQ, e.g., their electromagnetic current, produces a pair consisting of a heavy quarkoniumlike exotic meson (tetraquark) or baryon (pentaquark) and a light meson or an antibaryon. For a sufficiently large mass of the heavy quark mQ there is a range of the energy E above the QQ threshold, where Eâ‰mQ and still the energy is large compared to the strong interaction scale, Eâ‰ΛQCD. It is shown that in this energy range, where the heavy quarks are nonrelelativistic, a specific "intermediate asymptotic" behavior sets in determined by the number n of the pairs of constituent quarks, with the rate scaling as E1-n.

Original languageEnglish (US)
Article number074042
JournalPhysical Review D - Particles, Fields, Gravitation and Cosmology
Volume94
Issue number7
DOIs
StatePublished - Oct 28 2016

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