Abstract
The Drell-Yan and J/ψ cross-sections measured in Pb-Pb collisions are compared with the values extrapolated from the results obtained in proton and light ion induced reactions. While the Drell-Yan production exhibits the normal expected behaviour, the yield of J/ψ in Pb-Pb interactions is abnormally low, as it lies 9 standard deviations below the expected value. Moreover, the departure from the expected behaviour increases significantly from peripheral to central collisions.
Lingua originale | Inglese |
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pagine (da-a) | 337-343 |
Numero di pagine | 7 |
Rivista | Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics |
Volume | 410 |
Numero di pubblicazione | 2-4 |
DOI | |
Stato di pubblicazione | Pubblicato - 2 ott 1997 |
Pubblicato esternamente | Sì |