DSpace@DogusDSpace dijital arşiv sistemi toplar, depolar, dizinler, korur ve dijital araştırma materyallerini dağıtmaya aracılık eder.http://localhost:802018-11-11T04:44:39Z2018-11-11T04:44:39ZHidden bottom pentaquark states with spin 3/2 and 5/2Azizi, KazemSaraç, YaseminSundu, Hayriyehttp://hdl.handle.net/11376/31702018-11-10T01:01:09Z2017-11-01T00:00:00ZHidden bottom pentaquark states with spin 3/2 and 5/2
Azizi, Kazem; Saraç, Yasemin; Sundu, Hayriye
Theoretical investigations of the pentaquark states that were recently discovered provide important information on their nature and structure. It is necessary to study the spectroscopic parameters, like masses and residues of particles belong to the class of pentaquarks, and ones having similar structures. The mass and pole residue are quantities that emerge as the main input parameters in xploration of the electromagnetic strong and weak interactions of the entaquarks with other hadrons in many frameworks. This work deals with a QCD sum rule analysis of the spin-3/2 and spin-5/2 bottom pentaquarks with both positive and negative parities aiming to evaluate their masses and residues. In calculations, the pentaquark states are modeled by molecular-type interpolating currents: for particles with J = 5/2, a mixing current is used. We compare the results obtained in this work with the existing predictions of other theoretical studies. The predictions on the masses may shed light on experimental searches of the bottom pentaquarks.
Azizi, Kazem (Doğuş Author)
2017-11-01T00:00:00ZDecay widths of the excited Omega(b) baryonsAgaev, Shahin S.Azizi, KazemSundu, Hayriyehttp://hdl.handle.net/11376/31692018-11-10T01:01:23Z2017-11-01T00:00:00ZDecay widths of the excited Omega(b) baryons
Agaev, Shahin S.; Azizi, Kazem; Sundu, Hayriye
The LHCb Collaboration recently observed five narrow Omega(0)(c) resonances and measured their masses and widths through the decays Omega(0)(c) -> Xi(+)(c) K-. Motivated by this discovery, and also by the fact that the groundstate bottom baryon Omega(-)(b) with spin 1/2 was already found experimentally, we perform a theoretical investigation of the spin-1/2 and spin-3/2, Omega(b), baryons by calculating the decay width of their first orbitally and radially excited states to Xi(0)(b) K-. For this purpose, we employ the QCD sum rule method on the light cone by including in the analysis the K-meson distribution amplitudes up to twist 4. Obtained analytical expressions are utilized to extract parameters of these decay processes, which may be useful for forthcoming experimental studies of bottom baryons.
Azizi, Kazem (Doğuş Author)
2017-11-01T00:00:00ZMagnetic and quadrupole moments of the Z(c)(3900)Özdem, UlaşAzizi, Kazemhttp://hdl.handle.net/11376/31682018-11-10T01:01:19Z2017-10-01T00:00:00ZMagnetic and quadrupole moments of the Z(c)(3900)
Özdem, Ulaş; Azizi, Kazem
The electromagnetic properties of the tetraquark state Z(c)(3900) are investigated in the diquark-antidiquark picture and its magnetic and quadrupole moments are extracted. To this end, the light-cone QCD sum rule in electromagnetic background field is used. The magnetic and quadrupole moments encode the spatial distributions of the charge and magnetization in the particle. The result obtained for the magnetic moment is quite large and can be measured in future experiments. We obtain a nonzero but small value for the quadrupole moment of Z(c)(3900) indicating a nonspherical charge distribution.
Azizi, Kazem (Doğuş Author)
2017-10-01T00:00:00ZA comparative study on optimal transient control of aircraft enginesGao, YangWang, JiqiangWu, XinYe, ZhifengHu, ZhongzhiDimirovski, Georgi M.http://hdl.handle.net/11376/31672018-11-08T17:55:27Z2016-01-01T00:00:00ZA comparative study on optimal transient control of aircraft engines
Gao, Yang; Wang, Jiqiang; Wu, Xin; Ye, Zhifeng; Hu, Zhongzhi; Dimirovski, Georgi M.
Sequential quadratic programming has been widely used in the optimization of transient control of aircraft engine. On the other hand, the study of nonlinear optimization theory and method has been made great advance in recent years, of which active set method is one of the effective measures. In this article, the two algorithms are used to optimize the inputs based on one turbofan engine model. Results from the simulation comparisons of the two algorithms, advantages and disadvantages are given.
Dimiorvski, Georgi M. -- Conference full title: 2015 Chinese Intelligent Systems Conference, IFAC; Seoul; South Korea; 6 July 2008 through 11 July 2008. CISC; Yangzhou; China -- #nofulltext#
2016-01-01T00:00:00Z