$J/\psi$
               gluonic dissociation revisited: I. Fugacity, flux and formation time effects

Patra, Binoy Krishna; Menon, V. J.

doi:10.1140/epjc/s2004-01971-5

Cited by 16 publications

(31 citation statements)

References 25 publications

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“…This is precisely the case treated in our earlier paper [9] where the g − ψ relative flux was correctly taken in the ψ meson rest frame. Eqs.…”

Section: Static Medium Inmentioning

confidence: 71%

“…We now proceed to formulate the statistical mechanics of some physical observables following closely the logic of Ref. [9].…”

Section: Equation Of Motionmentioning

confidence: 99%

“…Figs.1, 2 borrowed from Ref. [9] display the temperature and transverse momentum dependence of the usual rate Γ based on (32, 33) relevant to the LHC(1) initial fugacity λ gi . For the sake of comparison the corresponding curves of the modified rate Γ using (34) are drawn in Figs.3, 4.…”

Section: Static Medium Inmentioning

confidence: 99%

“…The solid curve is the result of Ref. [9], i.e., in the absence of flow while the dotted and dashed curves represent the survival of J/ψ when the plasma is undergoing longitudinal expansion with the initial values of the length of the cylinder L i = 0.1 fm and 1 fm, respectively. …”

Section: Static Medium Inmentioning

confidence: 99%

“…This prescription was also utilized in [9] and it improves the work of [8] by incorporating the formation time.…”

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confidence: 99%

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$J/\psi$ gluonic dissociation revisited: II. Hydrodynamic expansion effects

Patra

Menon

2005

Eur. Phys. J. C

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We explicitly take into account the effect of hydrodynamic expansion profile on the gluonic breakup of J/ψ's produced in an equilibrating parton plasma. Attention is paid to the space-time inhomogeneities as well as Lorentz frames while deriving new expressions for the gluon number density n g , average dissociation rate Γ , and ψ survival probability S. A novel type of partial wave interference mechanism is found to operate in the formula of Γ . Nonrelativistic longitudinal expansion fro small length of the initial cylinder is found to push the S(p T ) graph above the no flow case considered by us earlier [9]. However, relativistic flow corresponding to large length of the initial cylinder pushes the curve of S(p T ) downwards at LHC but upwards at RHIC. This mutually different effect on S(p T ) may be attributed to the different initial temperatures generated at LHC and RHIC.

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“…This is precisely the case treated in our earlier paper [9] where the g − ψ relative flux was correctly taken in the ψ meson rest frame. Eqs.…”

Section: Static Medium Inmentioning

confidence: 71%

“…We now proceed to formulate the statistical mechanics of some physical observables following closely the logic of Ref. [9].…”

Section: Equation Of Motionmentioning

confidence: 99%

Section: Static Medium Inmentioning

confidence: 99%

Section: Static Medium Inmentioning

confidence: 99%

“…This prescription was also utilized in [9] and it improves the work of [8] by incorporating the formation time.…”

mentioning

confidence: 99%

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$J/\psi$ gluonic dissociation revisited: II. Hydrodynamic expansion effects

Patra

Menon

2005

Eur. Phys. J. C

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Thermal width and gluo-dissociation of quarkonium in pNRQCD

Brambilla

Escobedo

Ghiglieri

et al. 2011

J. High Energ. Phys.

138

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The thermal width of heavy-quarkonium bound states in a quark-gluon plasma has been recently derived in an effective field theory approach. Two phenomena contribute to the width: the Landau damping phenomenon and the break-up of a colour-singlet bound state into a colour-octet heavy quark-antiquark pair by absorption of a thermal gluon. In the paper, we investigate the relation between the singlet-to-octet thermal break-up and the so-called gluo-dissociation, a mechanism for quarkonium dissociation widely used in phenomenological approaches. The gluo-dissociation thermal width is obtained by convoluting the gluon thermal distribution with the cross section of a gluon and a 1S quarkonium state to a colour octet quark-antiquark state in vacuum, a cross section that at leading order, but neglecting colour-octet effects, was computed long ago by Bhanot and Peskin. We will, first, show that the effective field theory framework provides a natural derivation of the gluo-dissociation factorization formula at leading order, which is, indeed, the singlet-to-octet thermal break-up expression. Second, the singlet-to-octet thermal break-up expression will allow us to improve the Bhanot--Peskin cross section by including the contribution of the octet potential, which amounts to include final-state interactions between the heavy quark and antiquark. Finally, we will quantify the effects due to final-state interactions on the gluo-dissociation cross section and on the quarkonium thermal width.Comment: 17 pages, 6 figure

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Heavy quarks and quarkonia

Drapier

2006

Nuclear Physics A

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$J/\psi$ gluonic dissociation revisited: I. Fugacity, flux and formation time effects

Cited by 16 publications

References 25 publications

$J/\psi$ gluonic dissociation revisited: II. Hydrodynamic expansion effects

$J/\psi$ gluonic dissociation revisited: II. Hydrodynamic expansion effects

Thermal width and gluo-dissociation of quarkonium in pNRQCD

Heavy quarks and quarkonia

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