X(3872) and its heavy quark spin symmetry partners in QCD sum rules

Mutuk, Halil
Sarac, Yasemin
Gumus, Hasan
Özpineci, Altuğ
X(3872) presents many surprises after its discovery more than ten years ago. Understanding its properties is crucial to understand the spectrum of possible exotic mesons. In this work, X(3872) meson and its heavy quark spin symmetry (HQSS) partners (including the mesons in the bottom sector) are studied within the QCD Sum Rules approach using a current motivated by the molecular picture of X(3872). We predict four heavy partners to X(3872) and bottomonium with the masses and J(PC) quantum numbers. Obtained results are in good agreement with the previous studies and available experimental data within errors.


X(3872) and its charmonium content in Heavy Quark limit
Cincioglu, Elif; Nieves, Juan; Özpineci, Altuğ (EDP Sciences; 2016-06-30)
X(3872) still presents many puzzles more than a decade after its discovery. Some of its properties, like the isospin violating decays, can easily be accommodated in a molecular model, whereas its other properties, such as radiative decays can be more naturally explained in the quarkonium picture. The best of these schemes can be combined in a picture of X(3872) where it is dominantly a molecular state with some charmonium components. In this work, we present a model based on heavy quark symmetry which descr...
Systematic analysis of the exclusive B -> K*l(+)l(-) decay
Alıyev, Tahmasıb; Kim, YG (American Physical Society (APS), 2000-07-01)
A model-independent analysis for the exclusive, rare B-->K*l(+)l(-) decay is presented. Systematically studied are the experimentally measured quantities, such as the branching ratio, forward-backward asymmetry, longitudinal polarization of the final leptons, and the ratio Gamma(L)/Gamma(T) of the decay widths when the K* meson is longitudinally and transversally polarized. The dependence of the asymmetry parameter alpha = 2 Gamma(L)/Gamma(T)- l on the new Wilson coefficients is also studied in detail. It i...
X(3872) in Heavy Quark Limit of QCD: Its Partners and Isospin Structure
Özpineci, Altuğ (2014-06-19)
Although it has been more than ten years since the discovery of the X(3872) meson, its properties still contain puzzles. In this work, the results obtained using a correlation function approach on the degenerate partners of the X(3872) will be presented. The isospin structure is also discussed in the same framework. Finally, the X(3872) → D0D¯ 0π decay is proposed to study the isospin structure of the X(3872) meson.
Commissioning of the ATLAS Muon Spectrometer with cosmic rays
Aad, G.; et. al. (Springer Science and Business Media LLC, 2010-12-01)
The ATLAS detector at the Large Hadron Collider has collected several hundred million cosmic ray events during 2008 and 2009. These data were used to commission the Muon Spectrometer and to study the performance of the trigger and tracking chambers, their alignment, the detector control system, the data acquisition and the analysis programs. We present the performance in the relevant parameters that determine the quality of the muon measurement. We discuss the single element efficiency, resolution and noise...
Electroweak production of two jets in association with a Z boson in proton-proton collisions root s =13 TeV
Sirunyan, A. M.; et. al. (Springer Science and Business Media LLC, 2018-07-01)
A measurement of the electroweak (EW) production of two jets in association with a Z boson in proton-proton collisions at root s = 13 TeV is presented, based on data recorded in 2016 by the CMS experiment at the LHC corresponding to an integrated luminosity of 35.9 fb(-1). The measurement is performed in the lljj final state with l including electrons and muons, and the jets j corresponding to the quarks produced in the hard interaction. The measured cross section in a kinematic region defined by invariant ...
Citation Formats
H. Mutuk, Y. Sarac, H. Gumus, and A. Özpineci, “X(3872) and its heavy quark spin symmetry partners in QCD sum rules,” EUROPEAN PHYSICAL JOURNAL C, pp. 0–0, 2018, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/42271.