Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
1995-03-02
Phys.Lett.B349:569-575,1995
Physics
High Energy Physics
High Energy Physics - Phenomenology
Revtex, APS style, 7 pages, 3 figures in uuencoded file
Scientific paper
10.1016/0370-2693(95)00306-6
Double $J/\psi$ production has been observed by the NA3 collaboration in $\pi N$ and $p N$ collisions with a cross section of the order of 20-30 pb. The $\psi \psi$ pairs measured in $\pi^- $ nucleus interactions at 150 and 280 GeV$/c$ are observed to carry an anomalously large fraction of the projectile momentum in the laboratory frame, $x_{\psi \psi} \geq 0.6$ at 150 GeV$/c$ and $\geq 0.4$ at 280 GeV$/c$. We postulate that these forward $\psi \psi$ pairs are created by the materialization of Fock states in the projectile containing two pairs of intrinsic $c \overline c$ quarks. We calculate the overlap of the charmonium states with the $|\overline u d c \overline c c \overline c \rangle$ Fock state as described by the intrinsic charm model and find that the $\pi^- N \rightarrow \psi \psi$ longitudinal momentum and invariant mass distributions are both well reproduced. We also discuss double $J/\psi$ production in $pN$ interactions and the implications for other heavy quarkonium production channels in QCD.
Brodsky Stanley J.
Vogt Rainer
No associations
LandOfFree
Intrinsic Charm Contribution to Double Quarkonium Hadroproduction does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Intrinsic Charm Contribution to Double Quarkonium Hadroproduction, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Intrinsic Charm Contribution to Double Quarkonium Hadroproduction will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-172087