Proton-proton spin correlations at charm threshold and quarkonium bound to nuclei

Téramond, Guy F. de; Espinoza, Randall; Ortega‐Rodríguez, Manuel

doi:10.1103/physrevd.58.034012

Cited by 36 publications

(61 citation statements)

References 35 publications

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“…De Teramond and collaborators [14] have argued that reproducing the strength of the polarization asymmetry √ s in the vicinity of the threshold for cc production (about 10 GeV) requires an effective scattering length of about the same size as our result. We note that the estimate of Ref.…”

Section: −1supporting

confidence: 68%

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Is - scattering dominated by the gluonic van der Waals interaction?

1997

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Section: −1supporting

confidence: 68%

“…We note that the estimate of Ref. [14] includes the interactions of an ensemble of quarkonium states whose interactions with nucleons could be different than that of the J/ψ.…”

Section: −1mentioning

confidence: 99%

Is - scattering dominated by the gluonic van der Waals interaction?

1997

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“…Furthermore, the large charm quark mass m c ≫ Λ QCD provides a natural renormalization point for which a perturbative QCD expansion is partly possible. In fact, studies have shown that the multi-gluon exchange between a cc pair and nucleons might induce a bound cc state with even light nuclei [14][15][16][17][18][19][20]. In such analysis, the low energy multi-gluon potential was modeled either from the effective theory obtained in the infinitely large m Q limit [16][17][18] or from extrapolating the high energy scattering via pomeron exchange to lower energy [14].…”

Section: Introductionmentioning

confidence: 99%

QCD sum rules for J/ψ in the nuclear medium: calculation of the Wilson coefficients of gluon operators up to dimension 6

Kim

Lee

2001

Nuclear Physics A

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QCD sum rules for J/ψ in the nuclear medium: calculation of the Wilson coefficients of gluon operators up to dimension 6 Sungsik Kim and Su Houng LeeDepartment of Physics and Institute of Physics and Applied Physics, Yonsei University, Seoul 120-749, Korea AbstractWe calculate the Wilson coefficients of all dimension 6 gluon operators with non zero spin in the correlation function between two heavy vector currents. For the twist-4 part, we first identify the three independent gluon operators, and then proceed with the calculation of the Wilson coefficients using the fixed point gauge.Together with the previous calculation of the Wilson coefficients for the dimension 6 scalar gluon operators by Nikolaev and Radyushkin, our result completes the list of all the Wilson coefficients of dimension 6 gluon operators in the correlation function between heavy vector currents. We apply our results to investigate the mass of J/ψ in nuclear matter using QCD sum rules. Using an upper bound estimate on the matrix elements of the dimension 6 gluon operators to linear order in density, we find that the density dependent contribution from dimension 6 operators is less than 40% of the dimension 4 operators with opposite sign. The final result gives about −4 MeV mass shift for the charmonium at rest in nuclear matter.

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“…Our results for the mass shifts of the lowestcc states are surprisingly close to those reported in ref. [33][34][35][36].…”

Section: Heavy Quark System J/ψmentioning

confidence: 99%

Vector mesons in dense matter

Lee

2000

Nuclear Physics A

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We will summarize the progress in understanding the changes in the vector meson spectral density in nuclear medium using the constraint equations obtained from the Borel transformed dispersion relation and QCD Operator Product Expansion. We will discuss the results for the scalar mass shift and dispersion effects (three momentum dependence) for the light quark system (ρ, ω), the strange quark system (φ) and the heavy quark system (J/ψ) in nuclear medium. For the light quark systems, a nontrivial change in the mass and width are expected, while the dispersion effects are found to be small. Existing model calculations for the dispersion effects are compared to the constraint equation in detail. Very small, but accurate mass shift is obtained for the heavy quark system.

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Proton-proton spin correlations at charm threshold and quarkonium bound to nuclei

Cited by 36 publications

References 35 publications

Is - scattering dominated by the gluonic van der Waals interaction?

Is - scattering dominated by the gluonic van der Waals interaction?

QCD sum rules for J/ψ in the nuclear medium: calculation of the Wilson coefficients of gluon operators up to dimension 6

Vector mesons in dense matter

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