Dissociation of quarkonium in a complex potential

Thakur, Lata; Kakade, Uttam; Patra, Binoy Krishna

doi:10.1103/physrevd.89.094020

Cited by 60 publications

(111 citation statements)

References 89 publications

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“…only the longitudinal component of the momentum is present; hence no anisotropy arises between transverse and longitudinal components. One of us had recently derived an anisotropic heavy quark potential [20,21] in perturbative thermal QCD, where the anisotropy in the potential in the coordinate space had arisen from the manifested momentum anisotropy with respect to the direction of anisotropy in the distribution function.…”

Section: Heavy Quark Potential In a Hot Qcd Mediummentioning

confidence: 99%

“…Recently the properties of quarkonia states in a hot medium were explored in perturbative thermal QCD framework by correcting both the perturbative and non-perturbative terms of the QQ potential through the dielectric function in the real-time formalism [20,21] in both isotropic as well as anisotropic hot QCD medium, where the anisotropy in the momentum space arose at the very early stages of the collisions due to the different expansion rate in the longitudinal and transverse direction [22]. As mentioned earlier, magnetic field is also produced at the early stages of the collisions, thus it becomes worthwhile to examine the effects of the magnetic field on the properties of quarkonia bound states, which is the central theme of our present work.…”

Section: Introductionmentioning

confidence: 99%

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Heavy quark potential in a static and strong homogeneous magnetic field

2017

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We have investigated the properties of quarkonia in a thermal QCD medium in the background of strong magnetic field. For that purpose, we employ the Schwinger proper-time quark propagator in the lowest Landau level to calculate the one-loop gluon self-energy, which in the sequel gives the effective gluon propagator. As an artifact of strong magnetic field approximation (eB >> T 2 and eB >> m 2 ), the Debye mass for massless flavors is found to depend only on the magnetic field which is the dominant scale in comparison to the scales prevalent in the thermal medium. However, for physical quark masses, it depends on both magnetic field and temperature in a low temperature and high magnetic field but the temperature dependence is very meager and becomes independent of the temperature beyond a certain temperature and magnetic field. With the above mentioned ingredients, the potential between heavy quark (Q) and anti-quark (Q) is obtained in a hot QCD medium in the presence of a strong magnetic field by correcting both short-and longrange components of the potential in the real-time formalism. It is found that the long-range part of the quarkonium potential is affected much more by magnetic field as compared to the short-range part. This observation facilitates us to estimate the magnetic field beyond which the potential will be too weak to bind QQ together. For example, the J/ψ is dissociated at eB ∼ 10 m 2 π and ϒ is dissociated at eB ∼ 100 m 2 π whereas its excited states, ψ and ϒ are dissociated at smaller magnetic field eB = m 2 π , 13m 2 π , respectively.

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Section: Heavy Quark Potential In a Hot Qcd Mediummentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Heavy quark potential in a static and strong homogeneous magnetic field

2017

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“…Whenever the thermal width, Γ of the a given quarkonium is as large as twice the binding energy (real part) the given quarkonia state will dissolve [84] We applied the criteria for the cc bound states (J/ψ and ψ ′ ) and bb bound state (Υ and Υ ′ ). The quantitative estimates for the respective dissociation temperatures are enlisted in Tables II and IV. Let us now analyze the quantitative estimates for J/ψ and ψ ′ dissociation temperatures for EoS1 equating the thermal width with the twice of the BE.…”

Section: Overcoming Thermal Width Of the Resonance By The Binding Energymentioning

confidence: 99%

Dissociation of heavy quarkonium in hot QCD medium in a quasiparticle model

et al. 2016

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Following a recent work on the effective description of the equations of state for hot QCD obtained from a Hard thermal loop expression for the gluon self-energy, in terms of the quasi-gluons and quasiquark/anti-quarks with respective effective fugacities, the dissociation process of heavy quarkonium in hot QCD medium has been investigated. This has been done by investigating the medium modification to a heavy quark potential. The medium modified potential has a quite different form (a long range Coulomb tail in addition to the usual Yukawa term) in contrast to the usual picture of Debye screening. The flavor dependence of the binding energies of the heavy quarkonia states and the dissociation temperature have been obtained by employing the debye mass for pure gluonic and full QCD case computed employing the quasi-particle picture. Thus estimated dissociation patterns of the charmonium and bottomonium states, considering Debye mass from different approaches in pure gluonic case and full QCD, have shown good agreement with the other potential model studies. 24.85.+p; 12.38.Mh PACS

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“…The effects of these instabilities are not very clear, but they are very important for the QGP evolution at the RHIC or LHC. In recent years, the effect of anisotropy has also been studied to investigate the properties of quarkonium states [87][88][89][90][91][92][93]. It will be interesting to study its effects on the properties of the QGP system.…”

Section: Introductionmentioning

confidence: 99%

Shear viscosity η to electrical conductivity σel ratio for an anisotropic QGP

et al. 2017

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We study the transport properties of strongly interacting matter in the context of ultrarelativistic heavy ion collision experiments. We calculate the transport coefficients viz. shear viscosity (η) and electrical conductivity (σ el ) of the quark gluon plasma phase in the presence of momentum anisotropy arising from different expansion rates of the medium in longitudinal and transverse direction. We solve the relativistic Boltzmann kinetic equation in relaxation time approximation to calculate the shear viscosity and electrical conductivity. The calculation are performed within the quasiparticle model to estimate these transport coefficients and discuss the connection between them. We also compare the electrical conductivity results calculated from the quasiparticle model with the ideal case. We compare our results with the corresponding results obtained in different lattice as well as model calculations.

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Dissociation of quarkonium in a complex potential

Cited by 60 publications

References 89 publications

Heavy quark potential in a static and strong homogeneous magnetic field

Heavy quark potential in a static and strong homogeneous magnetic field

Dissociation of heavy quarkonium in hot QCD medium in a quasiparticle model

Shear viscosity η to electrical conductivity σel ratio for an anisotropic QGP

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