Researcher:
Özönder, Şener

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Şener

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Özönder

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Özönder, Şener

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2017 - 20182

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Researcher Of Publications: search.filters.isAuthorOfPublication.f047a333-2ef7-470c-880d-a5de76ae8cf3

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    Predictions on three-particle azimuthal correlations in proton-proton collisions
    (Scientific Technical Research Council Turkey-Tubitak, 2018) N/A; Department of Physics; Özönder, Şener; Researcher; Department of Physics; College of Sciences; N/A
    The ridge signal, which is long-ranged in rapidity, in di-hadron correlations in high-multiplicity p-p and p-A collisions opened up a whole new research area in high-energy QCD. Although the ridge had been observed in A-A collisions and interpreted as a result of the radial flow of quark-gluon plasma, it had not appeared until recently in the data of small collision systems such as p p and p A, nor had it been predicted theoretically or seen in event generators. There are two competing approaches that attempt to explain the systematics of the di-hadron ridge signal: hydrodynamics and gluon saturation physics (color glass condensate/glasma). In this work, we present predictions for the transverse momentum and rapidity dependence of the three-particle correlation function within gluon saturation physics. Tri-hadron correlations can be measured, and the data can possibly rule out one of the two alternative approaches.
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    PublicationOpen Access
    Cumulant expansion in gluon saturation and five- and six-gluon azimuthal correlations
    (American Physical Society (APS), 2017) Department of Physics; Özönder, Şener; Department of Physics; College of Sciences
    Correlations between the momenta of the final state hadrons measured in proton or nucleus collisions contain information that sheds light on the initial conditions and evolutionary dynamics of the collision system. These correlation measurements have revealed the long-range rapidity correlations in p-p and p-Pb systems, and they have also made it possible to extract the elliptic flow coefficient from hadron correlation measurements. In this work, we calculate five- and six-gluon correlation functions in the framework of saturation physics by using superdiagrams. We also derive the cumulant expansion of the gluon correlators that is valid in the gluon saturation limit. We show that the cumulant expansion of the gluon correlators that is used for counting the number of diagrams to be calculated does not follow the standard cumulant expansion. We also explain how these findings can be used in obtaining experimentally relevant observables such as flow coefficients calculated from correlations as well as ratios of the correlation functions of different orders.