Color-octet {psi}{sup {prime}} production at low {ital p}{sub {perpendicular}}

Journal Article · Wed May 01 00:00:00 EDT 1996 · Physical Review, D

DOI:https://doi.org/10.1103/PhysRevD.53.4851· OSTI ID:284048

Tang, W ^[1]; Vaenttinen, M ^[2]

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1. Stanford Linear Accelerator Center, Stanford University, Stanford, California 94309 (United States)
2. Research Institute for Theoretical Physics, University of Helsinki (Finland)

We study contributions from color-octet quarkonium formation mechanisms to {ital p}{sub {perpendicular}}-integrated {psi}{sup {prime}} production cross sections in pion-nucleon reactions. The observed polarization of the {psi}{sup {prime}} is not reproduced by calculations where leading-order, leading-twist {ital Q{bar Q}} production mechanisms are combined with the color-singlet and color-octet mechanisms of bound state formation. This shows that there are other important quarkonium production mechanisms at low {ital p}{sub {perpendicular}}. {copyright} {ital 1996 The American Physical Society.}

• Research Organization: Massachusetts Institute of Technology
• DOE Contract Number: AC02-76ER03069; AC03-76SF00515
• OSTI ID: 284048
• Journal Information: Physical Review, D, Journal Name: Physical Review, D Journal Issue: 9 Vol. 53; ISSN PRVDAQ; ISSN 0556-2821
• Country of Publication: United States
• Language: English

Related Subjects

66 PHYSICS
BOUND STATE
COLOR MODEL
MESON OCTETS
PARTICLE PRODUCTION
PION-NUCLEON INTERACTIONS
POLARIZATION
PSI-3685 MESONS
QUARKONIUM