Hard hadronic diffraction is not hard

Abstract

Hadronic diffractive processes characterised by a hard scale (hard diffraction) contain a nontrivial interplay of hard and soft, nonperturbative interactions, which breaks down factorisation of short and long distances. On the contrary to the expectations based on the factorization hypothesis, assuming that hard diffraction is a higher twist, these processes should be classified as a leading twist. We overview various implications of this important observation for diffractive radiation of Abelian (Drell-Yan, gauge bosons, Higgs boson) and non-Abelian (heavy flavors) particles, as well as direct coalescence into the Higgs boson of the non-perturbative intrinsic heavy flavour component of the hadronic wave function.

17 pages, 13 figures; final version published in Int. J. Mod. Phys. E (Special Issue on "Modern Topics on Non-perturbative QCD: Theory and Experiment")

References in corpus (9)

• Azimuthal anisotropy of direct photons
• Diffractive Higgs Production from Intrinsic Heavy Flavors in the Proton
• Azimuthal Asymmetry of pions in pp and pA collisions
• Higgs Hadroproduction at Large Feynman x
• Damping of forward neutrons in pp collisions
• Diffractive W and Z Production at the Fermilab Tevatron
• Drell-Yan phenomenology in the color dipole picture revisited
• Diffractive Excitation of Heavy Flavors: Leading Twist Mechanisms
• Diffractive Bremsstrahlung in Hadronic Collisions

Cited by in corpus (6)

• Pinning down the gauge boson couplings in $WW\gamma$ production using forward proton tagging
• Diffractive di-jet production at the LHC with a Reggeon contribution
• Hard diffractive ${\eta }_{\mathrm{c},\mathrm{b}}$ hadroproduction at the LHC
• Inclusive diffractive ${\eta }_{\mathrm{c}}$ production in pp, pA and AA modes at the LHC
• Probing the diffractive production of gauge bosons at forward rapidities
• Diffractive dijet production: breakdown of factorization