Important high-twist contribution to prompt single-photon production

Technical Report · Mon Feb 01 00:00:00 EST 1982

DOI:https://doi.org/10.2172/6113835· OSTI ID:6113835

Berger, E L

Quantitative predictions are presented for a specific hard-scattering reaction ..pi..N ..-->.. ..gamma..X in which both the incident meson and the produced prompt photon couple directly in the QCD amplitude. The process leads to a highly constrained class of events at large p/sub T/ in which the photon momentum is balanced by that of a recoil quark jet, with no spectator jet of final-state particles emerging along the beam axis. Normalized absolutely in terms of the electromagnetic form factor of the pion, F/sub ..pi../(Q/sup 2/), the cross section provides a lower bound on the total p/sub T//sup -6/ high twist contribution to the inclusive prompt-photon yield.

• Research Organization: Argonne National Lab. (ANL), Argonne, IL (United States)
• DOE Contract Number: W-31-109-ENG-38
• OSTI ID: 6113835
• Report Number(s): ANL-HEP-PR-82-18; ON: DE83009521; TRN: 83-011867
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
PION-NUCLEON INTERACTIONS
INCLUSIVE INTERACTIONS
QUANTUM CHROMODYNAMICS
CROSS SECTIONS
ELECTROMAGNETIC FORM FACTORS
GLUONS
JETS
PHOTONS
PIONS
PROMPT GAMMA RADIATION
QUARK-ANTIQUARK INTERACTIONS
QUARKS
RADIATIVE CORRECTIONS
TRANSVERSE MOMENTUM
TWISTOR THEORY
BOSONS
CORRECTIONS
ELECTROMAGNETIC RADIATION
ELEMENTARY PARTICLES
FIELD THEORIES
FORM FACTORS
GAMMA RADIATION
HADRON-HADRON INTERACTIONS
HADRONS
INTERACTIONS
IONIZING RADIATIONS
LINEAR MOMENTUM
MASSLESS PARTICLES
MESON-BARYON INTERACTIONS
MESON-NUCLEON INTERACTIONS
MESONS
PARTICLE INTERACTIONS
PARTICLE PROPERTIES
POSTULATED PARTICLES
PSEUDOSCALAR MESONS
QUANTUM FIELD THEORY
RADIATIONS
645202* - High Energy Physics- Particle Interactions & Properties-Theoretical- Electromagnetic Interactions & Properties