Photoproduction of charm near threshold - INSPIRE

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Photoproduction of charm near threshold

Oct, 2000

10 pages

Published in:

Phys.Lett.B 498 (2001) 23-28

e-Print:

hep-ph/0010343 [hep-ph]

DOI:

10.1016/S0370-2693(00)01373-3

Report number:

SLAC-PUB-8677,
NORDITA-90-HE,
DAPNIA-SPHN-00-72,
JLAB-PHY-00-25

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Abstract:

Charm and bottom production near threshold is sensitive to the multi-quark, gluonic, and hidden-color correlations of hadronic and nuclear wavefunctions in QCD since all of the target's constituents must act coherently within the small interaction volume of the heavy quark production subprocess. Although such multi-parton subprocess cross sections are suppressed by powers of

1/m^2_Q

, they have less phase-space suppression and can dominate the contributions of the leading-twist single-gluon subprocesses in the threshold regime. The small rates for open and hidden charm photoproduction at threshold call for a dedicated facility.

Note:

5 pages 5 figures Changes: 1- Added refs 24,25; 2- Added two sentences, top of column 2 of page 3, on the definition of x, its range and the domain of validity of the model Report-no: SLAC-PUB-8677, NORDITA-2000/90 HE, DAPNIA/SPhN-00-72

photon p: exclusive reaction
quark: photoproduction
quark: charm
quark: pair production
threshold
J/psi(3100): photoproduction
channel cross section: energy dependence
photon deuteron: exclusive reaction
n: energy spectrum
Feynman graph

References(23)

Figures(0)

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