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The European Physical Journal C

, Volume 44, Issue 4, pp 505–514 | Cite as

Production of spin-3 mesons in diffractive DIS

  • F. Caporale
  • I. P. IvanovEmail author
Theoretical Physics

Abstract.

We calculate the amplitudes of J PC = 3- - meson production in diffractive DIS within the kt-factorization approach, with particular attention paid to the \(\rho_3(1690)\) meson. We find that at all Q2 the \(\rho_3(1690)\) production cross section is 2-5 times smaller than the \(\rho(1700)\) production cross section, which is assumed to be a pure D-wave state. Studying \(\sigma_{\mathrm{L}}\) and \(\sigma_{\mathrm{T}}\) separately, we observe domination of \(\rho_3\) in \(\sigma_{\mathrm{L}}\) and domination of \(\rho(1700)\) in \(\sigma_{\mathrm{T}}\) and offer an explanation of this behavior in simple terms. We also find very strong contributions - sometimes even domination - of the s-channel helicity violating amplitudes. The typical color dipole sizes probed in \(\rho_3\) production are shown to be larger than those in the ground state \(\rho\) production, and the energy dependence of \(\rho_3\) cross section turns out to be much flatter than the \(\rho\) production cross section. All the conclusions about the relative behavior of the \(\rho_3(1690)\) and \(\rho(1700)\) mesons are numerically stable against variations of the input parameters.

Keywords

Production Cross Section Vector Meson Radial Wave Function Unintegrated Gluon Photoproduction Cross Section 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Springer-Verlag Berlin/Heidelberg 2005

Authors and Affiliations

  1. 1.INFN, Gruppo Collegato di CosenzaUniversitá della Calabria, Dipartimento di FisicaArcavacata di Rende (CS)Italy
  2. 2.Sobolev Institute of MathematicsRussia

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