Is There Anomalous J/ψ Suppression in Present-day Heavy-ion Collisions?
نویسندگان
چکیده
We re-analyse the data on J/ψ cross sections for proton-nucleus and nucleus-nucleus collisions obtained by the CERN experiments NA38, NA51 and NA50. Our systematic analysis of error propagation shows that the no anomalous suppression of J/ψ in Pb-Pb collisions can be substantiated at 95% confidence limit. The significance of the NA50 result would be enhanced by more precise p-A data on J/ψ cross sections.
منابع مشابه
J/ψ Suppression as a Signal for the Quark-Gluon Plasma
We review the search for the quark-gluon plasma using the signal of the suppression of J/ψ production in high-energy heavy-ion collisions. Recent anomalous J/ψ suppression in high-energy Pb-Pb collisions observed by the NA50 Collaboration are examined and compared with earlier results from pA and nucleus-nucleus collisions with heavy ions of smaller mass numbers. The anomalous suppression of J/...
متن کاملCorrelating Strangeness Enhancement and J/ψ Suppression in Heavy Ion Collisions at √ S Nn = 17.2 Gev
It is shown that the strangeness enhancement and the J/ψ anomalous suppression patterns observed in heavy ion collisions at top SPS energy, √ sNN = 17.2 GeV, exhibit an interesting correlation if studied as a function of the transverse size of the interaction region. The onset of both phenomena seems to occur when the size exceeds ≈ 4 fm. Strangeness enhancement is defined in terms of the stran...
متن کاملInitial State Energy Loss Dependence of J/Ψ and Drell-Yan in Relativistic Heavy Ion Collisions
We present a Glauber-based study of J/Ψ and Drell-Yan yields in nucleus-nucleus collisions. Using this approach, we have investigated the impact of energy loss by the colliding nuclei on observed yields and transverse momentum spectra of J/Ψ and Drell-Yan. These studies permit an assessment of the importance of initial state energy loss in relation to “anomalous” J/Ψ suppression.
متن کاملHow Hard Are the Form Factors in Hadronic Vertices with Heavy Mesons?
The NDΛc and ND ∗Λc form factors are evaluated in a full QCD sum rule calculation. We study the double Borel sum rule for the three point function of one meson one nucleon and one Λc current up to order six in the operator product expansion. The double Borel transform is performed with respect to the nucleon and Λc momenta, and the form factor is evaluated as a function of the momentum Q2 of th...
متن کاملCorrelating Strangeness enhancement and J / ψ suppression in Heavy
It is shown that the strangeness enhancement and the J/ψ anomalous suppression patterns observed in heavy ion collisions at top SPS energy, √ sNN = 17.2 GeV, exhibit an interesting correlation if studied as a function of the transverse size of the interaction region. The onset of both phenomena seems to occur when the size exceeds ≈ 4 fm. Strangeness enhancement is defined in terms of the stran...
متن کامل