Browsing by Author "Veliev, V."

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    ArticlePublicationOpen Access
    Hidden-beauty broad resonance Yb(10890) in thermal QCD
    (Hindawi Limited, 2019) Süngü, J. Y.; Türkan, Arzu; Dağ, Hüseyin; Veliev, V.; Natural and Mathematical Sciences; TÜRKAN, Arzu; DAĞ, Hüseyin
    In this work, the mass and pole residue of resonance Yb is studied by using QCD sum rules approach at finite temperature. Resonance Yb is described by a diquark-antidiquark tetraquark current, and contributions to operator product expansion are calculated by including QCD condensates up to dimension six. Temperature dependencies of the mass mYb and the pole residue Yb are investigated. It is seen that near a critical temperature (Tc similar or equal to 190MeV), the values of mYb and Yb decrease to 87% and to 44% of their values at vacuum.
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    Conference ObjectPublicationOpen Access
    Hot medium effects on pseudotensor K2(1820) meson
    (EDP Sciences, 2019) Türkan, Arzu; Dağ, Hüseyin; Süngü, J. Y.; Veliev, V.; Natural and Mathematical Sciences; Wronska, A.; Magiera, A.; Przygoda, W.; TÜRKAN, Arzu; DAĞ, Hüseyin
    The investigation of mesons in hot medium can give valuable information about the nature of QCD vacuum and deconfinement phase transitions. In this study, thermal properties of pseudotensor K-2(1820) meson is examined via QCD sum rules at finite temperature. The mass and the decay constant of K-2(1820) are estimated up to dimension-five by considering the new operators emerging at finite temperature. It is seen that after a certain temperature, the decay constant and the mass decrease significantly due to the hot medium effects.
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    Light D-wave axial-tensor K2(1820) meson at finite temperature
    (IOP Publishing, 2019-06) Türkan, Arzu; Dağ, Hüseyin; Süngü, J. Y.; Veliev, V.; Natural and Mathematical Sciences; TÜRKAN, Arzu; DAĞ, Hüseyin
    In this work the properties of the axial-tensor K-2(1820) meson in a hot medium are investigated. The mass and the decay constant of this state are calculated via thermal QCD sum rules considering QCD condensates up to dimension five. Our analysis show that both mass and decay constant stay almost monotonous up to certain temperatures and then they diminish with increasing temperature. The mass and decay constant estimated at zero temperature are in good agreement with the present experimental data and theoretical estimations.
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    Mass and pole residue of Yb(10890) state with JPC = 1−− at finite temperature
    (AIP Publishing, 2019) Süngü, J. Y.; Türkan, Arzu; Dağ, Hüseyin; Veliev, V.; Natural and Mathematical Sciences; TÜRKAN, Arzu; DAĞ, Hüseyin
    The status of the hidden beauty state Y-b is not clear up to now. The deviations from the expected behavior can provide a clue to consider it as an exotic meson candidate. Assuming the Y-b resonance as a tetraquark, we estimated its mass and pole residue, both at vacuum and T not equal 0 temperatures by calculating hot-medium contributions to hadronic parameters in the framework of Thermal QCD sum rules. Our results depict that the mass and pole residue values decrease dramatically at the vicinity of a critical temperature. Comparison of our results with the recent experimental data and theoretical results might be helpful in understanding the internal structure of bottomonium-like Y-b state.
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    Melting of 𝜌2 meson at extreme temperatures
    (American Institute of Physics Inc., 2019) Sertbakan, E.; Süngü, J. Y.; Türkan, Arzu; Veliev, V.; Natural and Mathematical Sciences; TÜRKAN, Arzu
    The thermal properties of the light tensor ρ2 meson with quantum numbers JPC = 2- are studied at finite temperature. In our calculations, two-point Thermal QCD sum rules approach is employed including contributions up to operator dimension-5 of quark, gluon, and quark-gluon mix condensates. We present thermal effects on the main hadronic properties namely, mass and decay constant of the considered resonance in SU(3) nonet, which provides more knowledge about axial-tensor family for experiments. The non-perturbative treatments of the light quark dynamics results in mass spectra at zero temperature agree with available experimental data and thermal behavior of meson parameters can be tested in future experiments.