Physics Group
Permanent URI for this collection
Browse
Browsing Physics Group by Author "Azizi, Kazım"
Now showing 1 - 3 of 3
Results Per Page
Sort Options
Article Investigation of a candidate spin-$\frac{1}{2}$ hidden-charm triple strange pentaquark state $P_{csss}$(Physical Review D, 2023-01-10) Azizi, Kazım; Saraç, Yasemin; Sundu, HayriyeA candidate triple strange pentaquark state, $P_{csss}$, is investigated through its strong decay channel $P_{csss} \rightarrow \Omega^-J/\psi $. To calculate the relevant strong coupling constants, two possible interpolating currents with spin-parity $J^P=\frac{1}{2}^{-}$ are used. Though the chosen currents for the state under consideration have spin-parity quantum numbers $J^P=\frac{1}{2}^{-}$, 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 $\Gamma(P_{csss} \rightarrow J/\psi \Omega^-)=201.4\pm 82.5~\mathrm{MeV}$ for the negative and $\Gamma(\widetilde{P}_{csss} \rightarrow J/\psi \Omega^-)=316.4\pm 107.8~\mathrm{MeV}$ for the positive parity state when the first current is used. For the second current, we obtain $\Gamma(P_{csss} \rightarrow J/\psi \Omega^-)=252.5\pm 116.7~\mathrm{MeV}$ for the negative and $\Gamma(\widetilde{P}_{csss} \rightarrow J/\psi \Omega^-)=361.1\pm 98.4~\mathrm{MeV}$ 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.Article Investigation of the strange pentaquark candidate P_{\psi s}(4338)^0 recently observed by LHCb(Physical Review D., 2023-10-01) Azizi, Kazım; Saraç, Yasemin; Sundu, HayriyeThe recently observed strange pentaquark candidate, PΛψs(4338)0, is investigated to provide information about its nature and substructure. To this end, its mass and width through the decay channels PΛψs(4338)0→J/ψΛ and PΛψs(4338)0→ηcΛ are calculated by applying two- and three-point QCD sum rules, respectively. The state is considered as a Ξc¯D meson-baryon molecular structure with spin-parity quantum numbers JP=12−. The obtained mass, mPΛψs(4338)0=4338±130 MeV, and width, ΓPΛψs(4338)0=10.40±1.93 MeV, are consistent with the experimental data within the presented uncertainties. This allows us to assign a Ξc¯D molecular structure of JP=12− for the PΛψs(4338)0 state.Article Investigation of Λ (1405)as a molecular pentaquark state(The European Physical Journal C, 2024-04-30) Azizi, Kazım; Saraç Oymak, Yasemin; Sundu, HayriyeΛ(1405) is one of the interesting particles with its unclear structure and distinct properties. It has a light mass compared to its non-strange counterpart, despite the strange quark it carries. This situation puts the investigation of this resonance among the hot topics in hadron physics and collects attention to clarify its properties. In this study, we focus on the calculation of the mass and residue of the Λ(1405) resonance within the framework of QCD sum rules. We assign a structure in the form of a molecular pentaquark composed from admixture of K− meson-proton and K¯ 0 meson neutron. Using an interpolating current in this form, the masses and the current coupling constant are attained as m = 1406±128 MeV and λ = (3.35±0.35)×10−5 GeV6 for /q and m = 1402±141 MeV and λ = (4.08 ± 1.08) × 10−5 GeV6 for I Lorentz structures entering the calculations, respectively. The obtained mass values agree well with the experimental data supporting the plausibility of the considered structure.