gluonic content and decays

Escribano, R.

doi:10.1016/j.nuclphysbps.2008.09.041

Cited by 2 publications

(1 citation statement)

References 27 publications

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“…The necessity of specifying a reference frame will become more accute as the natural next step in the analysis [17][18][19] will be to employ the data basis for radiative J/ψ decays accumulated by BES and others, and given the mass of 3097 MeV of the charmonium ground state, the velocity of the produced mesons will now be decidedly relativistic. For J/ψ → γη, v η = 0.94, and for J/ψ → γη , v η = 0.83, that are indeed significant.…”

Section: φ Radiative Decays and Fock Space Expansionmentioning

confidence: 99%

Boost operators in Coulomb gauge QCD: The pion form factor and Fock expansions in $ \phi$ radiative decays

et al. 2010

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In this article we re-derive the Boost operators in Coulomb Gauge Yang-Mills theory employing the path integral formalism and write down the complete operators for QCD. We immediately apply them to note that what are usually called the pion square, quartic . . . charge radii, defined from derivatives of the pion form factor at zero squared momentum transfer, are completely blurred out by relativistic and interaction corrections, so that it is not clear at all how to interpret these quantities in terms of the pion charge distribution. The form factor therefore measures matrix elements of powers of the QCD boost and Moeller operators, weighted by the charge density in the target's rest frame. In addition we remark that the decomposition of the η wave function in quarkonium, gluonium, . . . , components attempted by the KLOE Collaboration combining data from φ radiative decays, requires corrections due to the velocity of the final-state meson recoiling against a photon. This will be especially important if such decompositions are to be attempted with data from J/ψ decays.

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Section: φ Radiative Decays and Fock Space Expansionmentioning

confidence: 99%

Boost operators in Coulomb gauge QCD: The pion form factor and Fock expansions in $ \phi$ radiative decays

et al. 2010

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Pseudoscalar mixing in J/ψ and ψ(2 S ) decay

Wei¹,

Yongxu²

2010

Chinese Phys. C

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Based on the branching fractions of J/ψ (ψ (2S)) → VP from different collaborations, pseudoscalar mixing is extensively discussed with a well established phenomenological model. The mixing angle is determined to be −14° by fitting to the new world average if only quark content is considered. After taking into account the gluonic content in η and η′ simultaneously, the investigation shows that η favors only consisting of light quarks, while the gluonic content of η′ is Z2η′ = 0.30±0.24.

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gluonic content and decays

Cited by 2 publications

References 27 publications

Boost operators in Coulomb gauge QCD: The pion form factor and Fock expansions in $ \phi$ radiative decays

Boost operators in Coulomb gauge QCD: The pion form factor and Fock expansions in $ \phi$ radiative decays

Pseudoscalar mixing in J/ψ and ψ(2 S ) decay

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