Double-diffractive χ meson production at the hadron colliders
Khoze, V.A.; Martin, A.D.; Ryskin, M.G.; Stirling, W.J.
The double-diffractive production of χcχc and χbχb mesons, with a rapidity gap on either side, is studied, using both the Regge formalism and the perturbative QCD approach. Due to the rather low scale, the exclusive double-diffractive process pp→p+χ+ppp→p+χ+p is predicted to dominate, whereas the probability that the incoming protons dissociate is expected to be relatively small. We evaluate the corresponding χχ production cross sections at the Tevatron and LHC energies. For the double-diffractive process with proton dissociation, it is possible to select events with large transverse momenta transferred through the rapidity gaps, by measuring the transverse energy, E⊥E⊥, flows in the proton fragmentation regions. Then the large E⊥E⊥ provides a scale to justify the use of perturbative QCD, and to allow a spin-parity analysis of the centrally produced system to be performed, by studying the azimuthal angular correlations between the directions of the forward and backward E⊥E⊥ flows. The central production of the new X(3872) charmonium state is considered.
Khoze, V., Martin, A., Ryskin, M., & Stirling, W. (2004). Double-diffractive χ meson production at the hadron colliders. The European Physical Journal C, 35(2), 211-220. https://doi.org/10.1140/epjc/s2004-01857-6
|Journal Article Type||Article|
|Journal||European Physical Journal C: Particles and Fields|
|Peer Reviewed||Peer Reviewed|
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