Model of charmonium absorption by light mesons

Matinyan, S.G.; Müller, Berndt

doi:10.1103/physrevc.58.2994

Cited by 172 publications

(248 citation statements)

References 25 publications

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“…In this paper we use the approach discussed above to evaluate the dissociation cross sections of J/ψ by π and ρ, and compare our results to other theoretical cross sections reported in the literature [12][13][14][15][16]. We also calculate cross sections for the dissociation of ψ ′ by π and ρ, which have not been evaluated elsewhere.…”

Section: Matinyan and Müllermentioning

confidence: 97%

“…The dissociation of J/ψ by light mesons has been considered previously by several groups [12][13][14][15][16]. Unfortunately, the numerical cross sections quoted in these references span a considerable range, due largely to different assumptions regarding the dominant scattering mechanism.…”

mentioning

confidence: 99%

“…The applicability of the parton model and pQCD for reactions at this low energy region is open to question. [14], Haglin [15,19], and Lin [20] recently reported results for these dissociation cross sections in meson exchange models. They use effective meson Lagrangians and assume t-channel D and D * meson exchange, which leads to numerical results for π+J/ψ and ρ+J/ψ dissociation cross sections.…”

mentioning

confidence: 99%

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Cross sections forπ- andρ-induced dissociation ofJ/ψandψ
Wong
¹
,
Swanson
²
,
Barnes
³

2000
Phys. Rev. C
107
6
137
3
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We evaluate the cross sections for the dissociation of J/ψ and ψ ′ by π and ρ at low collision energies, using the quark-interchange model of Barnes and Swanson. The dissociation cross section for J/ψ by π is found to be relatively small with a maximum of about 1 mb and a kinetic energy threshold of 0.65GeV. The pion-induced ψ ′ dissociation cross section is found to be much larger, with a maximum of about 5 mb and a lower threshold. Dissociation cross sections for J/ψ and ψ ′ by ρ mesons are also evaluated and are found to be large near threshold.

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Section: Matinyan and Müllermentioning

confidence: 97%

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confidence: 99%

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confidence: 99%

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Cross sections forπ- andρ-induced dissociation ofJ/ψandψ
Wong
¹
,
Swanson
²
,
Barnes
³

2000
Phys. Rev. C
107
6
137
3
View full text Add to dashboard Cite

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“…Near the kinematical threshold this exchange was modeled in terms of an effective meson Lagrangian [7]. In fig.…”

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confidence: 99%

Charmonium production from secondary collisions at LHC energy

Braun‐Munzinger¹,

Redlich

2000

Eur. Phys. J. C

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We consider the charmonium production in thermalized hadronic medium created in ultrarelativistic heavy ion collisions at LHC energy. The calculations for the secondary J/ψ and ψ , production by DD annihilation are performed within a kinetic model taking into account the space-time evolution of a longitudinally and transversely expanding medium. We show that the secondary charmonium production appears almost entirely during the mixed phase and it is very sensitive to the charmonium dissociation cross section with co-moving hadrons. Within the most likely scenario for the dissociation cross section of the J/ψ mesons their regeneration in the hadronic medium will be negligible. The secondary production of ψ , mesons however, due to their large cross section above the threshold, can substantially exceed the primary yield.

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“…Therefore a precise evaluation of the background, i.e., conventional J/ψ absorption by co-moving pions and ρ mesons [2], is of fundamental importance. Since pions are so abundant in a dense nuclear environment, the reactions π + J/ψ → D + D * (and consequently the coupling g D * Dπ ) are of special relevance [3].…”

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confidence: 99%

DDπ and BBπ form factors from QCD sum rules

Nielsen

Navarra

Bracco

et al. 2001

Nuclear Physics B - Proceedings Supplements

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The H * Hπ form factor for H = B and D mesons is evaluated in a QCD sum rule calculation. We study the Borel sum rule for the three point function of two pseudoscalar and one vector meson currents up to order four in the operator product expansion. The double Borel transform is performed with respect to the heavy meson momenta. We discuss the momentum dependence of the form factors and two different approaches to extract the H * Hπ coupling constant. PACS numbers 14.40.Lb, 14.40.Nd, 12.38.Lg, 11.55.Hx The coupling of the pion to the heavy mesons (g B * Bπ and g D * Dπ ) is related to the form factor at zero pionic momentum and its precise value has been often needed in phenomenology. In particular, the g D * Dπ coupling is needed in the context of quark gluon plasma (QGP) physics. Suppression of charmonium production in heavy ion collisions is one of the signatures of QGP formation [1]. Therefore a precise evaluation of the background, i.e., conventional J/ψ absorption by co-moving pions and ρ mesons [2], is of fundamental importance. Since pions are so abundant in a dense nuclear environment, the reactions π + J/ψ → D + D * (and consequently the coupling g D * Dπ ) are of special relevance [3].In the case of g D * Dπ , the D * + → D 0 π + decay is observed experimentally. However, present data provide only an upper bound: g D * Dπ ≤ 21 [4]. For g B * Bπ , there cannot be a direct experimental indication because there is no phase space for the B * → Bπ decay. Recently, a direct preliminary determination of g B * Bπ on the lattice has been attempted [5].The D * Dπ and B * Bπ couplings have been studied by several authors using different approaches of the QCD sum rules (QCDSR): two point function combined with soft pion techniques [6,7], light cone sum rules [8,9], light cone sum rules including perturbative corrections [10], sum rules in a external field [11], double momentum sum rules [12]. Unfortunately, the numerical results from these calculations may differ by almost a factor two.

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Model of charmonium absorption by light mesons

Cited by 172 publications

References 25 publications

Cross sections forπ- andρ-induced dissociation ofJ/ψandψ
Wong
¹
,
Swanson
²
,
Barnes
³

2000
Phys. Rev. C
107
6
137
3
View full text Add to dashboard Cite

Cross sections forπ- andρ-induced dissociation ofJ/ψandψ
Wong
¹
,
Swanson
²
,
Barnes
³

2000
Phys. Rev. C
107
6
137
3
View full text Add to dashboard Cite

Charmonium production from secondary collisions at LHC energy

DDπ and BBπ form factors from QCD sum rules

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Model of charmonium absorption by light mesons

Cited by 172 publications

References 25 publications

Cross sections forπ- andρ-induced dissociation ofJ/ψandψWong1, Swanson2, Barnes3 2000Phys. Rev. C10761373View full textAdd to dashboardCite

Cross sections forπ- andρ-induced dissociation ofJ/ψandψWong1, Swanson2, Barnes3 2000Phys. Rev. C10761373View full textAdd to dashboardCite

Charmonium production from secondary collisions at LHC energy

D*Dπ and B*Bπ form factors from QCD sum rules

Contact Info

Product

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About

Cross sections forπ- andρ-induced dissociation ofJ/ψandψ
Wong
¹
,
Swanson
²
,
Barnes
³

2000
Phys. Rev. C
107
6
137
3
View full text Add to dashboard Cite

Cross sections forπ- andρ-induced dissociation ofJ/ψandψ
Wong
¹
,
Swanson
²
,
Barnes
³

2000
Phys. Rev. C
107
6
137
3
View full text Add to dashboard Cite

DDπ and BBπ form factors from QCD sum rules