Data di Pubblicazione:
2007
Abstract:
The NA60 experiment studies muon pair production at the CERN Super Proton Synchrotron. In this Letter we report on a precision measurement of J/psi in In-In collisions. We have studied the J/psi centrality distribution, and we have compared it with the one expected if absorption in cold nuclear matter were the only active suppression mechanism. For collisions involving more than ~80 participant nucleons, we find that an extra suppression is present. This result is in qualitative agreement with previous Pb-Pb measurements by the NA50 experiment, but no theoretical explanation is presently able to coherently describe both results.
Tipologia CRIS:
03A-Articolo su Rivista
Elenco autori:
R. ARNALDI; K. BANICZ; J. CASTOR; B. CHAURAND; C. CICALO'; A. COLLA; P. CORTESE; S. DAMJANOVIC; A. DAVID; A. DE FALCO; A. DEVAUX; L. DUCROUX; H. EN'YO; J. FARGEIX; A. FERRETTI; M. FLORIS; A. FOERSTER; P. FORCE; N. GUETTET; A. GUICHARD; H. GULKANIAN; J. M. HEUSER; M. KEIL; L. KLUBERG; C. LOURENCO; J. LOZANO; F. MANSO; A. MASONI; P. MARTINS; A. NEVES; H. OHNISHI; C. OPPEDISANO; P. PARRACHO; PH. PILLOT; T. POGHOSYAN; G. PUDDU; E. RADERMACHER; P. RAMALHETE; P. ROSINSKY; E. SCOMPARIN; J. SEIXAS; S. SERCI; R. SHAHOYAN; P. SONDEREGGER; H. J. SPECHT; R. TIEULENT; G. USAI; R. VEENHOF; H. K. WOEHRI
Link alla scheda completa:
Pubblicato in: