Yasemin Saraç Oymak

Saraç Oymak, Yasemin

Name Variants

S.O.Yasemin
Y.,Saraç Oymak
S., Yasemin
Saraç Oymak, Yasemin
Y., Sarac Oymak
Sarac Oymak,Yasemin
Yasemin, Sarac Oymak
Yasemin, Saraç Oymak
Y., Saraç Oymak
Y.,Sarac Oymak
S. O. Yasemin
Yasemin Saraç Oymak
S.,Yasemin
Sarac Oymak, Yasemin
Sarac Oymak,Y.
Saraç Oymak,Y.
Oymak, Yasemin Saraç
Sarac, Y.
Sarac, Yasemin

Job Title

Profesör Doktor

Email Address

yasemin.sarac@atilim.edu.tr

Main Affiliation

Physics Group

ORCID ID

0000-0002-0448-9929

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Scholarly Output

42

Articles

38

Citation Count

564

Supervised Theses

1 Scholarly Output Search Results

Now showing 1 - 10 of 42

Citation - WoS: 2
Citation - Scopus: 2
Analysis of the Semileptonic Transition of Heavy Ξ_q Baryon To Ξ Baryon in Light Cone Qcd Sum Rules
(Elsevier Science Bv, 2013) Sarac, Y.; Azizi, K.; Sundu, H.; Physics Group
This study presents the analysis of form factor calculations of semileptonic transitions of heavy baryons via light cone QCD sum rules. The work covers the semileptonic transitions of the Xi(b) and Xi(c) baryons. The form factors for the transitions Xi(b) -> Xi l(+)l(-) and Xi(c) -> Xi lv are obtained using their currents in the most general form. The obtained form factors are also used to calculate the decay widths and branching ratios of the considered transitions.
Citation - WoS: 18
Citation - Scopus: 18
Possible Molecular Pentaquark States With Different Spin and Quark Configurations
(Amer Physical Soc, 2018) Azizi, K.; Sarac, Y.; Sundu, H.; Physics Group
We investigate three possible pentaquark candidates, one of which contains a single charm quark and the other two contain triple charm quarks in their substructure. To this end we apply the QCD sum rule method and take into account both the positive and negative parity states corresponding to each possible pentaquark channel having spin 3/2 or 1/2. Insisting on the importance of identification of the members of the pentaquark family we obtain their spectroscopic parameters such as masses and residues. These parameters are the main inputs in the searches for their electromagnetic, strong, and weak interactions.
Citation - WoS: 1
Citation - Scopus: 1
Investigation of the D_s2*(2573)^{+< Vertex Via Qcd Sum Rules}
(Iop Publishing Ltd, 2014) Sarac, Y.; Azizi, K.; Sundu, H.; Physics Group
In this work the D-s2*(2573)+D+K-0 vertex is studied and the coupling constant corresponding to the D-s2*(2573)(+) -> (D+K0) transition is calculated. The calculation is performed using three point QCD sum rules method and the value of the coupling constant is obtained as gD(s2)*(DK) = (12.85 +/- 3.85) GeV-1. The coupling constant is also used to calculate the decay width and the branching ratio of the considered transition.
Citation - WoS: 28
Citation - Scopus: 25
Structure of the Ξ_b< Resonance
(Amer Physical Soc, 2018) Aliev, T. M.; Azizi, K.; Sarac, Y.; Sundu, H.; Physics Group
We explore the recently observed Xi(b)(6227)(-) resonance to fix its quantum numbers. To this end, we consider various possible scenarios: It can be considered as either a 1P or 2S excitation of the Xi(b) and Xi'(b)(5935) ground-state baryons with spin-1/2 or the 1P or 2S excitation of the ground-state Xi(b)(5955) with spin-3/2. We calculate the masses of the possible angular-orbital 1P and 2S excited states corresponding to each channel employing the QCD sum rule technique. It is seen that all the obtained masses are in agreement with the experimentally observed value, implying that the mass calculations are not enough to determine the quantum numbers of the state under question. Therefore, we extend the analysis to investigate the possible decays of the excited states into Lambda K-b(0)- and Xi(-)(b) pi. Using the light cone QCD sum rule method, we calculate the corresponding strong coupling constants, which are used to extract the decay widths of the modes under consideration. Our results on decay widths indicate that the Xi(b)(6227)(-) is a 1P angular-orbital excited state of the Xi(b)(5955) baryon with quantum numbers J(P) = 3/2(-).
Citation - WoS: 0
Citation - Scopus: 0
Κk⁺π^{-< Vertex in Light Cone Qcd Sum Rules}
(Amer Physical Soc, 2010) Baytemir, G.; Sarac, Y.; Yilmaz, O.; Physics Group
In this work we study the kappa K+pi(-) vertex in the framework of light cone QCD sum rules. We predict the coupling constant g kappa K+pi(-) to be g kappa K+pi(-) = (6.0 +/- 1.0) GeV and estimate the scalar f(0) - sigma mixing angle from the experimental ratio g(2)(kappa -> K pi)/g(2)(sigma -> pi pi).
Citation - WoS: 9
Citation - Scopus: 10
Investigation of a Candidate Spin-1/2 Hidden-Charm Triple Strange Pentaquark State p_csss<
(Amer Physical Soc, 2023) Azizi, K.; Sarac, Y.; Sundu, H.; Physics Group
A candidate triple strange pentaquark state, P-csss, is investigated through its strong decay channel P-csss -> C2-J=y/. To calculate the relevant strong coupling constants, two possible interpolating currents with spin-parity JP 1/4 1 - are used. Though the chosen currents for the state under consideration have spin-parity quantum numbers JP 1/4 1 -, they couple to both the positive and negative parity states simultaneously and the corresponding decay widths are obtained for both parities. These widths are obtained as foP(csss) -> J=y/C2- +/_ 1/4 201.4 82.5 MeV for the negative and fo P similar to csss -> J=y/C2- +/_ 1/4 316.4 107.8 MeV for the positive parity state when the first current is used. For the second current, we obtain foP(csss) -> J=y/C2- +/_ 1/4 252.5 116.7 MeV for the negative and fo P similar to csss -> J=y/C2- +/_ 1/4 361.1 ; 98.4 MeV for the positive parity state. These results may provide insights into future experimental observations of such candidate states and help to distinguish and fix their properties.
Citation - WoS: 11
Citation - Scopus: 11
Determination of the Possible Quantum Numbers for the Newly Observed Ξ_b< State
(Springer, 2021) Azizi, K.; Sarac, Y.; Sundu, H.; Physics Group
The LHCb Collaboration recently reported the observation of a new excited bottom baryon Xi(b)(6227)(0) and announced an improvement in the measurements related to the previously observed Xi(b)(6227)(-) state. We conduct an analysis for Xi(b)(6227)(0) state considering it as isospin partner of the Xi(b)(6227)(-) resonance and possibly 1P or 2S excited state with spin J = 3/2. The corresponding masses for both possibilities have consistent results with the experimental data, indicating that only with the mass sum rules, one can not make exact decision on the nature and quantum numbers of this state. To go further, the decays of these possible excited states to Xi(-)(b)pi(+) final state are also considered and the relevant strong coupling constants are extracted from the light cone sum rules. The obtained decay width values support the possibility of Xi(b)(6227)(0) to be the 1P excited state of Xi(b)(5945)(0) baryon.
Citation - WoS: 1
Citation - Scopus: 1
Strong D*₂(2460)⁰ → D⁺π^- Transition in QCD
(E D P Sciences, 2014) Sarac, Y.; Azizi, K.; Sundu, H.; Physics Group
This work presents the analysis of the transition D*(2)(2460)(0) > D+pi(-). In the calculation three point QCD sum rules method is applied and the value of the coupling constant for the considered vertex is obtained as gD*(2) D pi = (12.72 +/- 3.56) GeV-1.The result of the calculation is also utilized in the decay width and branching ratio calculations of the considered transition.
Citation - WoS: 7
Citation - Scopus: 7
Tree Level Semileptonic Σb To Nucleon Decay in Light Cone Qcd Sum Rules
(Amer Physical Soc, 2009) Azizi, K.; Bayar, M.; Ozpineci, A.; Sarac, Y.; Physics Group
Using the most general form of the interpolating current of the heavy spin 1/2, Sigma(b) baryon and distribution amplitudes of the nucleon, the transition form factors of the semileptonic Sigma(b) -> Nl nu decay are calculated in the framework of light-cone QCD sum rules. It is obtained that the form factors satisfy the heavy quark effective theory relations. The obtained results for the related form factors are used to estimate the decay rate of this transition.
Citation - WoS: 26
Citation - Scopus: 26
Strong Decay of p_c< (4380) Pentaquark in a Molecular Picture
(Elsevier, 2018) Azizi, K.; Sarac, Y.; Sundu, H.; Physics Group
There are different assumptions on the substructure of the pentaquarks P-c(4380) and P-c(4450), newly founded in J/psi N invariant mass by the LHCb Collaboration, giving consistent mass results with the experimental observations. The experimental data and recent theoretical studies on their mass suggest interpretation of these states as spin-3/2 negative-parity and spin-5/2 positive-parity pentaquarks, respectively. There may exist opposite-parity states corresponding to these particles, as well. Despite a lot of studies, however, the nature and internal organization of these pentaquarks in terms of quarks and gluons are not clear. To this end we need more theoretical investigations on other physical properties of these states. In this accordance, we study a strong and dominant decay of the P-c(4380) to J/psi and N in the framework of three point QCD sum rule method. An interpolating current in a molecular form is applied to calculate six strong coupling form factors defining the transitions of the positive and negative parity spin-3/2 pentaquark states. The values of the coupling constants are used in the calculation of the decay widths of these transitions. The obtained results are compared with the existing experimental data. (C) 2018 The Author(s). Published by Elsevier B.V.

Saraç Oymak, Yasemin

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Scholarly Output

42

Articles

38

Citation Count

564

Supervised Theses

1

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