Twist decomposition of proton structure from BFKL and BK amplitudes

Abstract

An analysis of twist composition of Balitsky-Kovchegov (BK) amplitude is performed in the double logarithmic limit. In this limit the BK evolution of color dipole -- proton scattering is equivalent to BFKL evolution which follows from vanishing of the Bartels vertex in the collinear limit. We perform twist decomposition of the BFKL/BK amplitude for proton structure functions and find compact analytic expressions that provide accurate approximations for higher twist amplitudes. The BFKL/BK higher twist amplitudes are much smaller than those following from eikonal saturation models.

10 pages, 5 figures

References in corpus (3)

• DeWitt-Schwinger Renormalization and Vacuum Polarization in d Dimensions
• Next-to-leading term of the renormalized stress-energy tensor of the quantized massive scalar field in Schwarzschild spacetime. The back reaction
• Conformal invariance and apparent universality of semiclassical gravity

Cited by in corpus (4)

• Twist expansion of Drell-Yan structure functions in color dipole approach
• Twist decomposition of Drell-Yan structure functions: phenomenological implications
• Twist decomposition of non-linear effects in Balitsky-Kovchegov evolution of proton structure functions
• Investigation of the ratio $\frac{{\sigma }_r}{F_2}(Q^2/s,Q^2)$ in the momentum-space approach