TY - JOUR
T1 - Exclusive double-charmonium production from e +e - annihilation into a virtual photon
AU - Braaten, Eric
AU - Lee, Jungil
PY - 2003
Y1 - 2003
N2 - We calculate the exclusive cross sections for e +e - annihilation into two charmonium states through a virtual photon. Purely electromagnetic contributions are surprisingly large, changing the cross sections by as much as 21%. The predicted cross section for J/ψ+ η c is about an order of magnitude smaller than a recent measurement by the BELLE Collaboration, although part of the discrepancy can be attributed to large relativistic corrections. The cross sections for S-wave + P-wave, P-wave + P-wave, and S-wave + D-wave charmonium states are also calculated. It may be possible to discover the D-wave state η c2(1D) at the B factories through the mode J/ψ+ η c2, whose cross section is predicted to be about a factor of 10 smaller than J/ψ+ η c.
AB - We calculate the exclusive cross sections for e +e - annihilation into two charmonium states through a virtual photon. Purely electromagnetic contributions are surprisingly large, changing the cross sections by as much as 21%. The predicted cross section for J/ψ+ η c is about an order of magnitude smaller than a recent measurement by the BELLE Collaboration, although part of the discrepancy can be attributed to large relativistic corrections. The cross sections for S-wave + P-wave, P-wave + P-wave, and S-wave + D-wave charmonium states are also calculated. It may be possible to discover the D-wave state η c2(1D) at the B factories through the mode J/ψ+ η c2, whose cross section is predicted to be about a factor of 10 smaller than J/ψ+ η c.
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U2 - 10.1103/PhysRevD.67.054007
DO - 10.1103/PhysRevD.67.054007
M3 - Article
AN - SCOPUS:0037367774
VL - 67
JO - Physical review D: Particles and fields
JF - Physical review D: Particles and fields
SN - 0556-2821
IS - 5
M1 - 054007
ER -