Spacelike and timelike form factors for {omega}{yields}{pi}{gamma}* and K*{yields}K{gamma}* in the light-front quark model

Journal Article · Thu May 01 04:00:00 EDT 2008 · Physical Review. D, Particles Fields

DOI:https://doi.org/10.1103/PHYSREVD.77.097301· OSTI ID:21250168

Choi, Ho-Meoyng ^[1]

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1. Department of Physics, Teachers College, Kyungpook, National University, Daegu, Korea 702-701 (Korea, Republic of)

We investigate space- and timelike form factors for {omega}{yields}{pi}{gamma}* and K*{yields}K{gamma}* decays using the light-front quark model constrained by the variational principle for the QCD-motivated effective Hamiltonian. The momentum dependent spacelike form factors are obtained in the q{sup +}=0 frame and then analytically continued to the timelike region. Our prediction for the timelike form factor F{sub {omega}}{sub {pi}}(q{sup 2}) is in good agreement with the experimental data. We also find that the spacelike form factor F{sub K*{sup {+-}}K{sup {+-}}}(Q{sup 2}) for charged kaons encounters a zero because of the negative interference between the two currents to the quark and the antiquark.

• OSTI ID: 21250168
• Journal Information: Physical Review. D, Particles Fields, Journal Name: Physical Review. D, Particles Fields Journal Issue: 9 Vol. 77; ISSN PRVDAQ; ISSN 0556-2821
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
CURRENTS
DECAY
FORECASTING
FORM FACTORS
GAMMA DECAY
HAMILTONIANS
INTERFERENCE
KAONS
OMEGA PARTICLES
PIONS
QUANTUM CHROMODYNAMICS
QUARK MODEL
QUARK-ANTIQUARK INTERACTIONS
SPACE
VARIATIONAL METHODS