Exclusive Hadronic Reactions at High $Q^2$

TL;DR

This paper discusses how short-distance QCD explains scaling laws in high Q^2 exclusive hadronic reactions, examines observed oscillations, and suggests future experiments to clarify these phenomena.

Contribution

It analyzes oscillatory deviations from expected scaling in high Q^2 reactions and explores potential explanations and connections to spin observables.

Findings

Evidence of oscillatory deviations from scaling laws

Possible explanations for oscillations and their relation to spin observables

Call for better data from existing or future facilities

Abstract

The observed scaling laws for large angle exclusive hadronic reactions are successfully accounted for by the short-distance QCD quark interchange processes. We focus on three hadronic reactions which shows evidence for a slight oscillatory deviation from the expected scaling behaviour. Possible explanations for these oscillations and connections to spin observables will be mentioned. Better data from excisting facilities (or a possible future KEK proton accelerator, JHP) can clarify the theoretical situation.