Instantons in Lepton Pair Production
arXiv:hep-ph/0605234 · doi:10.1016/j.nuclphysb.2006.07.020
Abstract
We consider QCD instanton-induced contributions to lepton pair production in hadron-hadron collisions. We relate these contributions to those known from deep inelastic scattering and demonstrate that they can be calculated reliably for sufficiently large momentum transfer. We observe that the instanton contribution to the angular distribution of the lepton pairs at finite momentum transfer strongly violates the Lam-Tung relation - a relation between coefficient functions of the angular distribution which is valid within the framework of ordinary perturbation theory. The drastic violation of this relation, as seen in experimental data, might be related to such instanton-induced effects.
24 pages, 9 figures, some comments added; to appear in Nuclear Physics B
References in corpus (36)
- New Generation of Parton Distributions with Uncertainties from Global QCD Analysis
- Instantons in QCD
- New features of FORM
- Non-perturbative quark mass renormalization in quenched lattice QCD
- Instantons at work
- Computation of the strong coupling in QCD with two dynamical flavours
- Topological Structure of the SU(3) Vacuum
- Confronting Instanton Perturbation Theory with QCD Lattice Results
- QCD Instantons and the Soft Pomeron
- Drell-Yan Lepton Angular Distribution at Small Transverse Momentum
- Angular Distributions of Drell-Yan Lepton Pairs at the Tevatron: Order Corrections and Monte Carlo Studies
- Semiclassical Study of Baryon and Lepton Number Violation in High-Energy Electroweak Collisions
- Instantons in Deep-Inelastic Scattering - The Simplest Process -
- Instanton-induced Inelastic Collisions in QCD
- Instanton-Induced Cross-Sections in Deep-Inelastic Scattering
- Instanton-induced contributions to structure functions of deep inelastic scattering
- Electroweak instantons/sphalerons at VLHC?
- QCDINS 2.0 - A Monte Carlo generator for instanton-induced processes in deep-inelastic scattering
- Monte Carlo simulation of baryon and lepton number violating processes at high energies
- Tracking QCD-Instantons
- Electroweak instantons as a solution to the ultrahigh energy cosmic ray puzzle
- Cosmic Ray Signatures of Multi-W Processes
- Search for QCD Instanton-Induced Processes in Deep-Inelastic Scattering at HERA
- Zooming-in on Instantons at HERA
- An upper bound on the total cross-section for electroweak baryon number violation
- Factorisation, Parton Entanglement and the Drell-Yan Process
- Effects of Electroweak Instantons In High-Energy Neutrino Telescopes
- QCD Instantons and High-Energy Diffractive Scattering
- Search for QCD-instanton induced events in deep inelastic ep scattering at HERA
- Antiproton--Proton Scattering Experiments with Polarization
- Cosmic rays at ultra high energies (Neutrinos!)
- Towards the Phenomenology of QCD-Instanton Induced Particle Production
- QCD-Instantons and Saturation at Small x
- Instanton-driven Gluon Saturation
- Instanton-Driven Saturation at Small x
- Instanton-Induced Processes - An Overview
Cited by in corpus (6)
- Dilepton production from polarized hadron hadron collisions
- Pion TMDs in light-front constituent approach, and Boer-Mulders effect in the pion-induced Drell-Yan process
- The pionic Drell-Yan process: a brief survey
- T-odd effects in photon-jet production at the Tevatron
- Anomalous Quark Chromomagnetic Moment and Single-Spin Asymmetries
- Spin correlations in the Drell-Yan process, parton entanglement, and other unconventional QCD effects