Yazar "Unal, Yasemin" seçeneğine göre listele

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    Öğe
    Different Contributions of the ? ? K0 (K)over-bar0 ? Decay
    (Amer Inst Physics, 2011) Kucukarslan, Ayse; Unal, Yasemin
    The scalar mesons and vector mesons contribution to the radiative decay phi -> K-0(K) over bar (0) gamma are studied within the framework of the phenomenological approach. The branching ratio of this decay is calculated to be 10(-8) - 10(-12). Furthermore, obtained values are compared with the experimental and theoretical results existing in the literature.
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    Öğe
    Pseudoscalar form factors of the ?(1232) in Baryon Chiral Perturbation Theory
    (Tubitak Scientific & Technological Research Council Turkey, 2020) Unal, Yasemin
    The pseudoscalar current-delta transition form factors are calculated in the framework of relativistic baryon chiral perturbation theory including order O(q(4)). The complex-mass scheme, which is suitable and well-defined for unstable particles, is taken into account as a renormalization scheme. We discuss the low energy behavior of the pseudoscalar (g) over tilde (Q(2)) and (h) over tilde (Q(2)) form factors and note that the momentum dependence of the form factors is dominated by the pion pole contributions.
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    Öğe
    Radiative ???? Vertex in QCD Sum Rules and Phenomenological Approach
    (Amer Inst Physics, 2011) Kucukarslan, Ayse; Ozdem, Ulas; Unal, Yasemin
    We estimate the coupling constant g(phi sigma gamma)by using the three- point correlation function and we also investigate this coupling constant by studying the effective lagrangians. Here we consider the effect the phi-omega mixing effect to the calculation. Besides, a comparison of our predictions with the theoretical results existing in literature is presented.
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    Öğe
    Scalar Mesons in the Decay ? ? K0(K)over-bar0?
    (Iop Publishing Ltd, 2012) Unal, Yasemin; Kucukarslan, Ayse
    We estimate the branching ratio of the phi -> K-0(K) over bar (0)gamma. decay within the framework of a phenomenological approach in which the contributions of the f(0)(980), a(0)(980) scalar resonances, chiral loops and K*(892) vector meson are considered. To evaluate the contribution of the scalar resonances, we consider the kaon-loop model and the no-structure model.