Properties of<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mi>J</mml:mi><mml:mo>/</mml:mo><mml:mi>ψ</mml:mi></mml:math>at<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:msub><mml:mi>T</mml:mi><mml:mi>c</mml:mi></mml:msub></mml:math>: QCD second-order Stark effect

Lee, Su Houng; Morita, Kenji

doi:10.1103/physrevd.79.011501

Cited by 32 publications

(39 citation statements)

References 33 publications

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“…which gives the second-order Stark effect formula for the external gauge field [54]. The same formula is obtained for η c .…”

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confidence: 67%

“…This structure in QCD sum rules indicates that we could investigate how changes in properties of QCD vacuum in the OPE manifest themselves in hadron properties in external environments. Indeed, the QCD sum rules at finite temperature/density [46][47][48] have been applied to heavy quarkonia [49][50][51][52][53][54][55][56][57][58][59], light mesons [60,61], and heavy-light mesons [62] in the last two decades, and very recently those in strong external magnetic fields [33,34].…”

Section: Introductionmentioning

confidence: 99%

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Charmonium spectroscopy in strong magnetic fields by QCD sum rules:S-wave ground states

et al. 2015

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We investigate quarkonium mass spectra in external constant magnetic fields by using QCD sum rules. We first discuss a general framework of QCD sum rules necessary for properly extracting meson spectra from current correlators computed in the presence of strong magnetic fields, that is, a consistent treatment of mixing effects caused in the mesonic degrees of freedom. We then implement operator product expansions for pseudoscalar and vector heavy-quark current correlators by taking into account external constant magnetic fields as operators, and obtain mass shifts of the lowestlying bound states ηc and J/ψ in the static limit with their vanishing spatial momenta. Comparing results from QCD sum rules with those from hadronic effective theories, we find that the dominant origin of mass shifts comes from a mixing between ηc and J/ψ with a longitudinal spin polarization, accompanied by other subdominant effects such as mixing with higher excited states and continua.

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“…which gives the second-order Stark effect formula for the external gauge field [54]. The same formula is obtained for η c .…”

mentioning

confidence: 67%

Section: Introductionmentioning

confidence: 99%

Charmonium spectroscopy in strong magnetic fields by QCD sum rules:S-wave ground states

et al. 2015

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“…Here, we will summarize the recent developments [10,11] to attach the problem using QCD sum rules and the QCD second order Stark effect. The inputs are the temperature dependencies of local gluonic operators, which undergoes abrupt changes across the phase transition as does the energy density.…”

Section: Introductionmentioning

confidence: 99%

Properties of quarkonia atT_c

Lee¹,

Morita²

2008

J. Phys. G: Nucl. Part. Phys.

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Abstract. We discuss how the spectral changes of quarkonia at T c can reflect the "critical" behaviour of QCD phase transition. Starting from the temperature dependencies of the energy density and pressure from lattice QCD calculation, we extract the temperature dependencies of the scalar and spin 2 gluon condensates near T c . We also parameterize these changes into the electric and magnetic condensate near T c . While the magnetic condensate hardly changes across T c , we find that the electric condensate increases abruptly above T c . Similar abrupt change is also seen in the scalar condensate. Using the QCD second-order Stark effect and QCD sum rules, we show that these sudden changes induce equally abrupt changes in the mass and width of J/ψ, both of which are larger than 100 MeV at slightly above T c .

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“…The effect of temperature on the J /ψ in deconfinement phase was studied in Refs. [42,43]. In these investigations, it was reported that J /ψ mass is essentially constant in a wide range of temperatures and above a particular value of the temperature, T , there is a sharp change in the mass of J /ψ in the deconfined phase; for example, in Ref.…”

Section: Resultsmentioning

confidence: 97%

J/ψandηcmasses in isospin asymmetric hot nuclear matter: A QCD sum rule approach

2010

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We study the in-medium masses of the charmonium states J /ψ and η c in the nuclear medium using the QCD sum rule approach. These mass modifications arise owing to modifications of the scalar and the twist-2 gluon condensates in the hot hadronic matter. The scalar gluon condensate αs π G a µν G a µν and the twist-2 tensorial gluon operator αs π G a µσ G a ν σ in the nuclear medium are calculated from the medium modification of a scalar dilaton field introduced to incorporate trace anomalies of QCD within the chiral SU(3) model used in the present investigation. The effects of isospin asymmetry, density, and temperature of the nuclear medium on the in-medium masses of the lowest charmonium states J /ψ and η c mesons are investigated in the present work. The results of the present investigation are compared with the existing results on the masses of these states. The medium modifications of the masses of these charmonium states (J /ψ and η c ) seem to be appreciable at high densities and should modify the experimental observables arising from the compressed baryonic matter produced in asymmetric heavy-ion collision experiments at the future facility of Facility for Antiproton and Ion Research, GSI.

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Properties ofJ/ψatTc: QCD second-order Stark effect

Cited by 32 publications

References 33 publications

Charmonium spectroscopy in strong magnetic fields by QCD sum rules:S-wave ground states

Charmonium spectroscopy in strong magnetic fields by QCD sum rules:S-wave ground states

Properties of quarkonia atT_c

J/ψandηcmasses in isospin asymmetric hot nuclear matter: A QCD sum rule approach

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Properties ofJ/ψatTc: QCD second-order Stark effect

Cited by 32 publications

References 33 publications

Charmonium spectroscopy in strong magnetic fields by QCD sum rules:S-wave ground states

Charmonium spectroscopy in strong magnetic fields by QCD sum rules:S-wave ground states

Properties of quarkonia atTc

J/ψandηcmasses in isospin asymmetric hot nuclear matter: A QCD sum rule approach

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Product

Resources

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Properties of quarkonia atT_c