Path dependence of the quark nonlocal condensate within the instanton model

Trevisan, Luis A.; Dorokhov, A.E.; Tomio, Lauro

doi:10.1590/s0103-97332004000500042

Braz. J. Phys.

2004

DOI: 10.1590/s0103-97332004000500042

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Path dependence of the quark nonlocal condensate within the instanton model

Luis A. Trevisan

A.E. Dorokhov²,

Lauro Tomio

Abstract: Within the instanton liquid model, we study the dependence of the gauge invariant two-point quark correlator on the path used to perform the color parallel transport between two points in the Euclidean space.

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2009

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References 7 publications

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“…So pion-pair creation does not seem to stem from the constituent cc system. Nevertheless, besides a cc component we may assume the presence of glue [23,24]. The latter field will, in the periphery, absorp little of the cc oscillations and the corresponding resonances.…”

mentioning

confidence: 99%

Interference effects in theX(4260)signal

Beveren

Rupp

2009

Phys. Rev. D

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We show that the long known puzzling branching ratios of open-charm decays in e + e − annihilation can be reasonably described with a simple form factor, which strongly suppresses open channels far above threshold. Application to the e + e − → J/ψ ππ data on the X(4260) enhancement recently reported by the BABAR Collaboration [1] allows a good fit with a simple nonresonant cusp structure around the D * s D * s threshold. Moreover, we argue that a closer look at the data reveals an oscillatory pattern, which we model as an interference effect between a fast -OZI-allowed -and a slow -OZI-forbidden -J/ψ f 0 (980) mode. Other candidates for similar nonresonant enhancements are discussed.

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mentioning

confidence: 99%

Interference effects in theX(4260)signal

Beveren

Rupp

2009

Phys. Rev. D

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Path dependence of the quark nonlocal condensate within the instanton model

Abstract: Within the instanton liquid model, we study the dependence of the gauge invariant two-point quark correlator on the path used to perform the color parallel transport between two points in the Euclidean space.

Cited by 1 publication

References 7 publications

Interference effects in theX(4260)signal

Interference effects in theX(4260)signal

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