Exclusive channels in semi-inclusive production of pions and kaons

Journal Article · Wed Jun 01 04:00:00 EDT 2005

OSTI ID:841120

Diehl, Markus; Kugler, Wolfgang; Schaefer, Andreas; Weiss, Christian

We investigate the role of exclusive channels in semi-inclusive electroproduction of pions and kaons. Using the QCD factorization theorem for hard exclusive processes we evaluate the cross sections for exclusive pseudoscalar and vector meson production in terms of generalized parton distributions and meson distribution amplitudes. We investigate the uncertainties arising from the modeling of the nonperturbative input quantities. Combining these results with available experimental data, we compare the cross sections for exclusive channels to that obtained from quark fragmentation in semi-inclusive deep inelastic scattering. We find that rho0 production is the only exclusive channel with significant contributions to semi-inclusive pion production at large z and moderate Q2. The corresponding contribution to kaon production from the decay of exclusively produced phi and Kstar is rather small.

• Research Organization: Thomas Jefferson National Accelerator Facility, Newport News, VA (US)
• Sponsoring Organization: USDOE Office of Energy Research (ER) (US)
• DOE Contract Number: AC05-84ER40150
• OSTI ID: 841120
• Report Number(s): JLAB-THY-05-375; DOE/ER/40150-3460; hep-ph/0506171
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
AMPLITUDES
CROSS SECTIONS
DECAY
DEEP INELASTIC SCATTERING
DISTRIBUTION
ELECTROPRODUCTION
FACTORIZATION
FRAGMENTATION
KAONS
MESONS
PARTONS
PIONS
PRODUCTION
PSEUDOSCALARS
QUANTUM CHROMODYNAMICS
QUARKS
SIMULATION
VECTOR MESONS