Saraç Oymak, Yasemin
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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
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
ORCID ID
Scopus Author ID
Turkish CoHE Profile ID
Google Scholar ID
WoS Researcher ID
Scholarly Output
42
Articles
38
Citation Count
564
Supervised Theses
1
42 results
Scholarly Output Search Results
Now showing 1 - 10 of 42
Article Citation Count: 3gΣQΣQπ coupling constant via light cone QCD sum rules(Amer Physical Soc, 2010) Azizi, K.; Bayar, M.; Ozpineci, A.; Sarac, Y.; Physics GroupUsing the most general form of the interpolating currents, the coupling constants g(Sigma b Sigma b pi) and g(Sigma c Sigma c pi) are calculated within the light cone QCD sum rules approach. It is found that g(Sigma c Sigma c pi) = -8.0 +/- 1.7 and g(Sigma b Sigma b pi) = -11.0 +/- 2.1.Article Citation Count: 18Λb(6146)0 state newly observed by LHCb(Amer Physical Soc, 2020) Azizi, K.; Sarac, Y.; Sundu, H.; Physics GroupWe study the bottom Lambda(b)(6146)(0) baryon, newly discovered by the LHCb Collaboration. By adopting an interpolating current of (L-rho, L-lambda) = (0, 2) type and D-wave nature with spin-parity quantum numbers J(P) = 3/2(+) for this heavy bottom baryon, we calculate its mass and residue. Using these spectroscopic parameters, we also investigate its dominant decays Lambda(b)(6146)(0) -> Sigma(b)pi and Lambda(b)(6146)(0) -> Sigma(*)(b)pi and estimate the width of Lambda(b)(6146)(0) obtained via these channels. The obtained mass, m(Lambda b) = (6144 +/- 68) MeV is in accord nicely with the experimental data. The width obtained via the dominant channels is also consistent with the experimental data of LHCb collaboration. We calculate the spectroscopic parameters and the same decay channels for the c-partner of Lambda(b)(6146)(0) state, namely Lambda(c)(2860)(+), as well. We compare the obtained results with the existing theoretical predictions as well as experimental data. The results indicate that the state Lambda(b)(6146)(0) and its charmed-partner Lambda(c)(2860)(+) can be considered as 1D-wave baryons with J(P) = 3/2(+).Article Citation Count: 0Investigation of full-charm and full-bottom pentaquark states(Springer, 2024) Azizi, K.; Sarac, Y.; Sundu, H.; Physics GroupThe continuous advancement of experimental techniques and investigations has led to observations of various exotic states in particle physics. Each addition to this family of states not only raises expectations for future discoveries but also focuses attention on such potential new states. Building upon this motivation and inspired by recent observations of various traditional and exotic particles containing an increased number of heavy quarks, our study provides a spectroscopic search for potential pentaquark states with spin-parity 32-\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$\frac{3}{2}<^>-$$\end{document} and composed entirely of charm or bottom quarks. We predict the masses for full-charm and full-bottom pentaquark states as m=7628 +/- 112\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$m = 7628 \pm 112$$\end{document} MeV and m=21,982 +/- 144\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$m = 21,982 \pm 144$$\end{document} MeV, respectively. We also compute the current couplings of these states to vacuum, which are main inputs in investigations of their various possible decays.Article Citation Count: 17Possible molecular pentaquark states with different spin and quark configurations(Amer Physical Soc, 2018) Azizi, K.; Sarac, Y.; Sundu, H.; Physics GroupWe 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.Conference Object Citation Count: 1Investigation of the Ds2*(2573)+D+K0 vertex via QCD sum rules(Iop Publishing Ltd, 2014) Sarac, Y.; Azizi, K.; Sundu, H.; Physics GroupIn 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.Article Citation Count: 75Analysis of Pc+(4380) and Pc+(4450) as pentaquark states in the molecular picture with QCD sum rules(Amer Physical Soc, 2017) Azizi, K.; Sarac, Y.; Sundu, H.; Physics GroupTo better understand the nature and internal structure of the exotic states discovered by many collaborations, more information on their electromagnetic properties and their strong and weak interactions with other hadrons is needed. The residue or current coupling constant of these states together with their mass are the main inputs in determinations of such properties. We perform QCD sum rules analyses on the hidden-charm pentaquark states with spin parities J(P) = 3/2 (+/-) and J(P) = 5/2 (+/-) to calculate their residue and mass. In the calculations, we adopt a molecular picture for J(P) = 3/2(+/-) states and a mixed current in a molecular form for J(P) = 5/2(+/-). Our analyses show that the P-c(+) (4380) and P-c(+) (4450), observed by the LHCb Collaboration, can be considered as hidden-charm pentaquark states with J(P) = 3/2(-) and JP = 5/2(+), respectively.Article Citation Count: 10FCNC transitions of Λb,c to nucleon in SM(Iop Publishing Ltd, 2010) Azizi, K.; Bayar, M.; Sarac, Y.; Sundu, H.; Physics GroupWe provide a comprehensive study of semileptonic flavor-changing neutral current transitions for Lambda(b) -> nl(+) l(-) and Lambda(c) -> pl(+) l(-) in the context of light cone QCD sum rules. Using the most general form of the interpolating current for Lambda(b),(c), as well as nucleon distribution amplitudes, we calculate all 12 form factors entering the calculations in full theory. We obtain the order of heavy quark effective theory violation and argue that the Lambda(b) -> nl(+) l(-) case can be studied at LHC, but the other one has a very small branching ratio.Article Citation Count: 35Investigation of Pcs(4459)0 pentaquark via its strong decay to ΛJ/Ψ(Amer Physical Soc, 2021) Azizi, K.; Sarac, Y.; Sundu, H.; Physics GroupRecently the observation of a new pentaquark state, the hidden-charmed strange P-cs(4459)(0), was reported by the LHCb Collaboration. The spin-parity quantum numbers of this state were not determined as a result of insufficient statistics. To shed light on its quantum numbers, we investigate its decay, P-cs(4459)(0) -> J/Psi Lambda, the mode that this state has been observed, within the QCD sum rule framework. We obtain the width of this decay assigning the spin-parity quantum numbers of the P-cs(4459)(0) state as J(P) = 1-/2 and its substructure as diquark-diquark-antiquark. To this end, we first calculate the strong coupling constants defining the considered decay and then use them in the width calculations. The obtained width is consistent with the experimental observation, confirming the quantum numbers J(P) = 1-/2 and compact pentaquark nature for the P-cs(4459)(0) state.Article Citation Count: 12Determination of the possible quantum numbers for the newly observed Ξb(6227)0 state(Springer, 2021) Azizi, K.; Sarac, Y.; Sundu, H.; Physics GroupThe 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.Conference Object Citation Count: 1Strong D*2(2460)0 → D+π- Transition in QCD(E D P Sciences, 2014) Sarac, Y.; Azizi, K.; Sundu, H.; Physics GroupThis 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.
