J/ψ dissociation by pions in QCD

Durães, F. O.; Lee, Su Houng; Navarra, F. S.; Nielsen, M.

doi:10.1016/s0370-2693(03)00709-3

Cited by 40 publications

(23 citation statements)

References 32 publications

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“…[5,15] and work at the kaon pole as suggested in [7] for the nucleon-pion coupling constant. This method was also applied to nucleon-kaon-hyperon coupling [16,17], D Ã À D À coupling [18,19], and to the J=c À cross section [20]. It consists in neglecting the kaon mass in the denominator of Eq.…”

Section: B Decay Widthmentioning

confidence: 99%

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Looking for meson molecules in B decays

Nielsen¹,

Navarra²,

Bediaga³

2013

AIP Conference Proceedings

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We discuss the possibility of observing a loosely bound molecular state in a three-body hadronic B decay. In particular, we use the QCD sum rule approach to study a 0 À molecular current. We consider an isovector-scalar I G J PC ¼ 1 À 0 þþ molecular current, and we use two-and three-point functions to study the mass and decay width of such a state. We consider the contributions of condensates up to dimension six, and we work at leading order in s . We obtain a mass around 1.1 GeV, consistent with a loosely bound state, and a 0 À ! K þ K À decay width around 10 MeV.

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Section: B Decay Widthmentioning

confidence: 99%

“…Therefore, the pole-continuum contribution can be taken into account through the introduction of a parameter A on the phenomenological side of the sum rule in Eq. (14) by making the substitution [5,17,18,20].…”

Section: B Decay Widthmentioning

confidence: 99%

Looking for meson molecules in B decays

Nielsen¹,

Navarra²,

Bediaga³

2013

AIP Conference Proceedings

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“…There are other ways to deal with these effects, either employing the Color Octect Model [14] or using QCD sum rules, where cross sections become functions of the vacuum condensates [15].…”

Section: J/ψ Production In Proton-proton and Proton-nucleus Collimentioning

confidence: 99%

J/psi production in the saturation regime

Durães¹

2007

Braz. J. Phys.

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In this work we calculate the J/ψ production in the initial stage of proton-proton, proton-nucleus and nucleusnucleus collisions at RHIC and LHC energies, taking into account the high parton density regime of QCD, where the physics of parton saturation is expected to be dominant. We perform a quantitative analysis of the x F distributions in these collisions with the Color Glass Condensate (CGC) approach. The ratio between distributions with or without saturated gluons shows that this mechanism produces a suppression on the J/ψ yield in the forward region and presents a dip in intermediate values of x F , which is visible only at LHC energies.

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“…The most explored approach has been the meson exchange mechanism [16][17][18][19][20]. In our opinion, the most reliable calculations of σ J/ψ−π were done with QCD sum rules [21]. However, due to a low momentum approximation, the validity of this calculation was restricted to low energy reactions, close to the dissociation threshold.…”

Section: Introductionmentioning

confidence: 99%