Person:
TÜRKAN, Arzu

First Name

Arzu

Last Name

TÜRKAN

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Natural and Mathematical Sciences

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Now showing 1 - 10 of 17

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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.
Open Access
Modifications on the properties of (2317) as four-quark state in thermal medium
(Jagiellonian University, 2022) Türkan, Arzu; Süngü, J. Y.; Veli Veliev, E.; Natural and Mathematical Sciences; TÜRKAN, Arzu
The low mass of Ds∗0(2317) presents problems for the conventional quark model, leading to consideration of other options regarding a multi-quark system. Here, we investigate the scalar open-charm state Ds∗0(2317) and its bottom partner by the Thermal QCD Sum Rules (TQCDSR) method using the two-point correlation function with contributions of the nonperturbative condensates up to dimension six. Our calculations indicate that the variations in mass and decay constant values are stable through temperatures up to T ∼= 100 MeV and fall after this point. At the critical temperature, the values of mass and decay constant change up to 94%, 71% of their values in vacuum in the molecular scenario, and 94%, 75% in the diquark–antidiquark scenario. Besides, we find more dramatic changes in mass and decay constant above Tc, and hence we interpret it as the hadrons starting to disappear. Also, the detailed search for hot medium effects on the hadronic parameters of open-charm meson Ds∗0(2317) and the bottom partner may have implications for the QCD phase diagram derived from heavy-ion collision experiments. Finally, these results may help distinguish conventional quark model mesons from exotic states.
Open Access
Properties of spin-1=2 heavy baryons at nonzero temperature
(American Physical Society, 2021-11-18) Türkan, Arzu; Bozkır, G.; Azizi, K.; Natural and Mathematical Sciences; TÜRKAN, Arzu
The spectroscopic properties of single heavy spin-1/2 ΛQ, ςQ, ΞQ(′), and ωQ baryons are investigated at finite temperature in the framework of the thermal QCD sum rule. We discuss the behavior of the mass and residue of these baryons with respect to temperature, taking into account contributions of nonperturbative operators up to dimension eight. We include additional operators coming from the Wilson expansion due to breaking the Lorentz invariance at nonzero temperature. The obtained results show that the mass of these baryons remain stable up to roughly T=108 MeV while their residue is unchanged up to T=93 MeV. After these points, the mass and residue start to diminish by increasing the temperature. The shifts in the mass and residue for both the bottom and charm channels are considerably large and we observe the melting of these baryons near to the pseudocritical temperature determined by recent lattice QCD calculations. We present our results for the mass of these baryons with both the positive and negative parity at the T→0 limit, which are consistent with the existing theoretical predictions as well as experimental data.
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Investigating the structure of X(4140) in QCD
(EDP Sciences, 2017) Dağ, Hüseyin; Türkan, Arzu; Natural and Mathematical Sciences; TÜRKAN, Arzu; DAĞ, Hüseyin
In this work, the masses of the ground states coupling to molecular or tetraquark currents with JPC = 0++, 1++, 2++ are studied to investigate the structure of X(4140) exotic meson observed at J/ψφ invariant mass spectrum. We found that all currents predict ground states with masses of the same magnitude, which might be inter-pereted as the existance of at least three exotic structures with degenerate mass.
Open Access
In the pursuit of X(5568) and its charmed partner
(Jagellonian University, 2019-09) Süngü, J. Y.; Türkan, Arzu; Veliev, E. V.; Natural and Mathematical Sciences; TÜRKAN, Arzu
The recent observation by the D empty set Collaboration of the first tetraquark candidate with four different quark flavors (u, d, s and b) in the B-s(0)pi(+/-) channel having a narrow structure has still not been confirmed by other collaborations. Further independent experiments are required either to confirm the X(5568) state or to set limits on its production. Though quantum numbers are not exactly clear, the results existing in the literature indicate that it is probably an axial-vector or scalar state candidate. In this study, mass and pole residue of the X (5568) resonance assumed as a tightly bound diquark, with spin-parity both J(P) = 1(+) or J(PC) = 0(++) are calculated using two-point Thermal SVZ Sum Rules technique by including condensates up to dimension six. Moreover, its partner in the charm sector is also discussed. Investigations defining the thermal properties of X(5568) and its charmed partner may provide valuable hints and information for the upcoming experiments such as CMS, LHCb and PANDA.
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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.
Open 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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Properties of kaon at non-zero temperature and baryon chemical potential
(Springer, 2023-10-14) Bozkır, G.; Türkan, Arzu; Azizi, K.; Natural and Mathematical Sciences; TÜRKAN, Arzu
We investigate the spectroscopic properties of the strange particle kaon in the framework of hot and dense QCD. To this end, first, we find the perturbative spectral density, which is connected with both the temperature T and the baryon chemical potential μB . We include the non-perturbative operators as functions of temperature and baryon chemical potential up to mass dimension five. We perform the calculations in momentum space and use the quark propagator in the hot and dense medium. The numerical results at non-zero temperature and baryon chemical potential demonstrate that the mass of the particle rises considerably by increasing the baryon chemical potential at a fixed temperature (for both the zero and non-zero temperatures) up to approximately μB= 0.4 GeV. After this point, it starts to fall by increasing the baryon chemical potential and it apparently vanishes at μB= (1.03–1.15) GeV for finite temperatures: The point of apparent vanishing moves to lower baryon chemical potentials by increasing the temperature. At zero temperature, the mass reaches to roughly a fixed value at higher baryon chemical potentials. On the other hand, the decay constant decreases considerably with respect to baryon chemical potential up to roughly μB= 0.4 GeV, but after this point, it starts to increase in terms of the baryon chemical potential at finite temperatures. At T= 0 , the decay constant reaches to a fixed value at higher chemical potentials, as well. Regarding the dependence on the temperature we observe that, at fixed values of baryon chemical potentials, the mass and decay constant remain roughly unchanged up to T= 50 MeV and T= 70 MeV respectively, but after these points, the mass starts to fall and the decay constant starts to rise up to a critical temperature T= 155 MeV, considerably. It is also seen that the obtained results for the mass and decay constant at T= μB= 0 are in good consistency with the existing experimental data. The observations are consistent with the QCD phase diagram in the T- μB plane.
Open Access
S-wave single heavy baryons with spin-3/2 at finite temperature
(Springer Nature, 2020-05-15) Azizi, K.; Türkan, Arzu; Natural and Mathematical Sciences; TÜRKAN, Arzu
The thermal behavior of the spectroscopic parameters of the S-wave single heavy baryons Sigma Q,Xi Q and Omega Q with spin-3/2 are investigated in QCD at finite temperature. We analyze the variations of the mass and residue of these baryons taking into consideration the contributions of QCD thermal condensates up to dimension eight in Wilson expansion. At finite temperature, due to the breakdown of the Lorentz invariance by the choice of reference frame and presence of an extra O(3) symmetry, some new four-dimensional operators come out in the form of the fermionic and gluonic parts of the energy momentum tensor that are taken into account in the calculations. Our analyses show that at lower temperatures, the parameters of baryons under consideration are not affected by the medium. These parameters, however, show rapid variations with respect to temperature at higher temperatures near to a pseudo-critical temperature, after which the baryons are melted. The results of the masses and residues at T -> 0 limit are compatible with the available experimental data and predictions of other theoretical studies.
Open Access
Analysis of X(4140) like states and their radial excitations in QCD
(Sissa Medialab Srl, 2017) Türkan, Arzu; Dağ, Hüseyin; Natural and Mathematical Sciences; TÜRKAN, Arzu; DAĞ, Hüseyin
In this work, we investigated the X(4140) and like states and their radial excitations by using molecular and diquark-antidiquark currents which couple to scalar, axial vector and tensor states via QCD sum rules. In operator product expansion, we considered quark, gluon and mixed vacuum condansates up to dimension eight. For the ground states coupling to these currents, we found that masses are almost degenerate with X(4140). For the excited states, we found that scalar and tensor currents are coupling to D∗ sD∗ s threshold. However for the axial vector currents, the mass of the first excited state is compatible with X(4274). Thus we conclude that, X(4274) might be the first radial excitation of X(4140).