Particle Production at High Energy and Large Transverse Momentum - "The Hybrid Formalism" Revisited

Abstract

We revisit the "`hybrid formalism"' for particle production used recently to study saturation effects in single hadron multiplicities at forward rapidities at RHIC and LHC. We point out that at leading twist there is an extra contribution to the formulae used so far, which corresponds to particle production via inelastic scattering of the projectile partons on the target fields. This contribution is expected to be small due to kinematics at very forward rapidities/very high transverse momenta, but should be significant at high momenta and very high energies. This contribution is expected to be most affected by saturation effects and is therefore an interesting object of study in the context of possible onset of saturation at high energies.

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• Towards the Test of Saturation Physics Beyond Leading Logarithm
• Dipole factorization for DIS at NLO I: Loop correction to the photon to quark-antiquark light-front wave-functions
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• Linearly-polarized small-x gluons in forward heavy-quark pair production
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• Next-to-next-to-eikonal corrections in the CGC
• Universality of multi-particle production in QCD at high energies
• Matching Collinear and Small-x Factorization Calculations for Inclusive Hadron Production in pA Collisions
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• Testing the Gaussian Approximation to the JIMWLK Equation
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• Multi-particle production in proton-nucleus collisions in the Color Glass Condensate
• Saturation in inclusive production beyond leading logarithm accuracy
• Azimuthal asymmetries in high-energy collisions of protons with holographic shockwaves
• Forward Inclusive Jet Productions in pA Collisions
• Soft photon and two hard jets forward production in proton-nucleus collisions
• On the Threshold Resummation in Forward pA Collisions
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• Forward Hadron Productions in Proton-Proton Collisions in Small-$x$ Formalism
• Particle Production in pA Collisions and QCD Saturation
• Low-$x$ Physics in $pA$ Collisions and at the EIC
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