Number Density Interpretation of Dihadron Fragmentation Functions
Daniel Pitonyak, C. Cocuzza, Andreas Metz, Alexei Prokudin, N. Sato
Abstract
We present a new quantum field-theoretic definition of fully unintegrated dihadron fragmentation functions (DiFFs) as well as a generalized version for n-hadron fragmentation functions. We demonstrate that this definition allows certain sum rules to be satisfied, making it consistent with a number density interpretation. Moreover, we show how our corresponding so-called extended DiFFs that enter existing phenomenological studies are number densities and also derive their evolution equations. Within this new framework, DiFFs extracted from experimental measurements will have a clear physical meaning.
Topics & Concepts
Fragmentation (computing)Interpretation (philosophy)Statistical physicsPhysicsNuclear physicsComputer scienceProgramming languageOperating systemParticle physics theoretical and experimental studiesQuantum Chromodynamics and Particle InteractionsHigh-Energy Particle Collisions Research