J/$\psi$ production in Indium-Indium collisions at 158 GeV/nucleon
R. Arnaldi
,
K. Banicz
,
B. Chaurand
(1)
,
C. Cicalò
,
A. Colla
,
P. Cortese
,
S. Damjanovic
,
A. David
,
A. de Falco
,
A. Devaux
(2)
,
L. Ducroux
(3)
,
H. En'Yo
,
A. Ferretti
,
M. Floris
,
A. Förster
,
P. Force
(2)
,
N. Guettet
,
A. Guichard
(3)
,
H. Gulkanyan
,
J.M. Heuser
,
M. Keil
,
L. Kluberg
(1)
,
C. Lourenço
,
J. Lozano
,
F. Manso
(2)
,
P. Martins
,
A. Masoni
,
A. Neves
,
H. Ohnishi
,
C. Oppedisano
,
P. Parracho
,
Philippe Pillot
(3)
,
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
(3)
,
G. Usai
,
R. Veenhof
,
H. Wöhri
R. Arnaldi
- Function : Author
K. Banicz
- Function : Author
C. Cicalò
- Function : Author
A. Colla
- Function : Author
P. Cortese
- Function : Author
S. Damjanovic
- Function : Author
A. David
- Function : Author
A. de Falco
- Function : Author
H. En'Yo
- Function : Author
A. Ferretti
- Function : Author
M. Floris
- Function : Author
A. Förster
- Function : Author
N. Guettet
- Function : Author
H. Gulkanyan
- Function : Author
J.M. Heuser
- Function : Author
M. Keil
- Function : Author
C. Lourenço
- Function : Author
J. Lozano
- Function : Author
P. Martins
- Function : Author
- PersonId : 878076
- IdHAL : martins-philippe
- ORCID : 0000-0001-9497-4890
A. Masoni
- Function : Author
A. Neves
- Function : Author
H. Ohnishi
- Function : Author
C. Oppedisano
- Function : Author
P. Parracho
- Function : Author
Philippe Pillot
- Function : Author
- PersonId : 175815
- IdHAL : ppillot
- ORCID : 0000-0002-9067-0803
T. Poghosyan
- Function : Author
G. Puddu
- Function : Author
E. Radermacher
- Function : Author
P. Ramalhete
- Function : Author
P. Rosinsky
- Function : Author
E. Scomparin
- Function : Author
J. Seixas
- Function : Author
S. Serci
- Function : Author
R. Shahoyan
- Function : Author
P. Sonderegger
- Function : Author
H.J. Specht
- Function : Author
G. Usai
- Function : Author
R. Veenhof
- Function : Author
H. Wöhri
- Function : Author
Abstract
The NA60 experiment studies muon pair production at the CERN SPS. 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.