STUDY OF TCC+ AND HIDDEN CHARMONIUM 1+- AND 0++ TETRAQUARKS IN QCD SUM RULES

Date

2025-1-10

Author

Sarı Ferah, Semra

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Recently, exotic hadrons have become a very important and interesting topic for particle physics, especially after the observation of the exotic particle X(3872). The Tcc+ tetraquark, which has a very similar structure to X(3872), was observed in the LHCB experiment of CERN in 2021. However, this new particle has different properties than the previously observed exotic hadrons, as it contains two heavy quarks and no heavy antiquark. In this study, the masses of the double open charm Tcc+ tetraquark, and hidden charm states with JPC=1+- and JPC=0++, and with the motivation taken from heavy-quark spin symmetry, their mass relations are studied.QCD sum rules method, which allows successful results in hadron phenomenology, is used in the calculations. As a result of the analyses, by determining the most appropriate values of the parameters required for the QCD sum rules, the mass of the Tcc+ tetraquark is obtained in a manner comparable to the experiments and as predicted by heavy-quark spin symmetry, the mass differences of the 1+- and 0++ states are found to be small enough, only a few MeV, as expected.

Subject Keywords

Exotic hadron, ,X(3872), ,Tcc+ tetraquark, double open charm, JPC=1+- and JPC=0++ states, ,hidden charm, heavy-quark spin symmetry, QCD, QCD Sum Rules

URI

https://hdl.handle.net/11511/113515

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Graduate School of Natural and Applied Sciences, Thesis