التفاصيل البيبلوغرافية
| العنوان: |
The strong decays of X(3940) and X(4160). |
| المؤلفون: |
Zhi-Hui Wang, Yi Zhang, Li-Bo Jiang, Tian-hong Wang, Yue Jiang, Guo-Li Wang |
| المصدر: |
European Physical Journal C -- Particles & Fields; Jan2017, Vol. 77 Issue 1, p1-8, 8p |
| مصطلحات موضوعية: |
RADIOACTIVE decay, MESONS, TWO-body problem (Physics), BETHE-Salpeter equation, DATA analysis |
| مستخلص: |
The new mesons X(3940) and X(4160) have been found by Belle Collaboration in the processes e+e-→J/ψD(∗)D¯(∗)e+e-→J/ψD(∗)D¯(∗). Considering X(3940) and X(4160) as ηc(3S)ηc(3S) and ηc(4S)ηc(4S) states, the two-body open charm OZI-allowed strong decay of ηc(3S)ηc(3S) and ηc(4S)ηc(4S) are studied by the improved Bethe-Salpeter method combined with the 3P03P0 model. The strong decay width of ηc(3S)ηc(3S) is Γηc(3S)=(33.5+18.4-15.3)Γηc(3S)=(33.5-15.3+18.4) MeV, which is close to the result of X(3940); therefore, ηc(3S)ηc(3S) is a good candidate of X(3940). The strong decay width of ηc(4S)ηc(4S) is Γηc(4S)=(69.9+22.4-21.1)Γηc(4S)=(69.9-21.1+22.4) MeV, considering the errors of the results, it is close to the lower limit of X(4160). But the ratio of the decay width Γ(DD¯*)Γ(D*D¯*)Γ(DD*)Γ(D*D¯*) of ηc(4S)ηc(4S) is larger than the experimental data of X(4160). According to the above analysis, ηc(4S)ηc(4S) is not the candidate of X(4160), and more investigations of X(4160) is needed. [ABSTRACT FROM AUTHOR] |
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