Measurement of the J/psi production cross section in 920-GeV/c fixed-target proton-nucleus interactions.

HERA-B COLLABORATION , H. WAHLBERG

PHYSICS LETTERS B

Año: 2006 vol. 638 p. 407 - 414

0370-2693

The mid-rapidity (dsigma_(pN)/dy at y=0) and total sigma_(pN) production cross sections of J/Psi mesons are measured in proton-nucleus interactions. Data collected by the HERA-B experiment in interactions of 920 GeV/c protons with carbon, titanium and tungsten targets are used for this analysis. The J/Psi mesons are reconstructed by their decay into lepton pairs. The total production cross section obtained is sigma_(pN)(J/Psi) = 663 +- 74 +- 46