Mixing of X and Y states from QCD sum rules analysis

【摘要】 We study ■ and ■ states as mixed states in QCD sum rules.By calculating the two-point correlation functions of pure states of their corresponding currents,we review the mass and coupling constant predictions of J^PC=1⁺⁺,1^--,and 1^-+ states.By calculating the two-point mixed correlation functions of ■ and ■ currents,we estimate the mass and coupling constants of the corresponding "physical state" that couples to both ■ and ■ currents.Our results suggest that for 1⁺⁺ states,the ■ and ■ components are more likely to mix,while for 1^-- and 1^-+ states,there is less mixing between ■ and ■.Our results suggest the Y series of states have more complicated components.更多还原

【Abstract】 We study ■ and ■ states as mixed states in QCD sum rules.By calculating the two-point correlation functions of pure states of their corresponding currents,we review the mass and coupling constant predictions of J^PC=1⁺⁺,1^--,and 1^-+ states.By calculating the two-point mixed correlation functions of ■ and ■ currents,we estimate the mass and coupling constants of the corresponding "physical state" that couples to both ■ and ■ currents.Our results suggest that for 1⁺⁺ states,the ■ and ■ components are more likely to mix,while for 1^-- and 1^-+ states,there is less mixing between ■ and ■.Our results suggest the Y series of states have more complicated components.更多还原