TY - JOUR
T1 - The universal Ψ′/Ψ′ ratio as unambiguous signature for hard physics in nuclear reactions and in decays of beauty hadrons
AU - Frankfurt, L.
AU - Gerland, L.
AU - Strikman, M.
AU - Zhalov, M.
N1 - Funding Information:
We thank E. Braaten and T. Ullrich for a useful discussion. This work was supported in part by GIF and DOE. L.G. thanks the Minerva Foundation for support.
PY - 2003/6/19
Y1 - 2003/6/19
N2 - 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.
AB - 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.
UR - http://www.scopus.com/inward/record.url?scp=0037643658&partnerID=8YFLogxK
U2 - 10.1016/S0370-2693(03)00640-3
DO - 10.1016/S0370-2693(03)00640-3
M3 - מאמר
AN - SCOPUS:0037643658
VL - 563
SP - 68
EP - 72
JO - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
JF - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
SN - 0370-2693
IS - 1-2
ER -