期刊
PHYSICAL REVIEW D
卷 99, 期 11, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevD.99.116023
关键词
-
资金
- fundamental scientific researches of the Siberian Branch of the Russian Academy of Sciences [0314-2019-0021, II.15.1]
The isospin-breaking decay X(3872) -> (D*(D) over bar+(D) over bar *D)-> pi D-0 (D) over bar -> pi(0)pi(+)pi(-) is discussed. In its amplitude there is a triangle logarithmic singularity, due to which the dominant contribution to BR(X(3872)->pi(0)pi(+)pi(-)) comes from the production of the pi(+)pi(-) system in a narrow interval of the invariant mass m(pi+pi-) near the value of 2m(D0) approximate to 3.73 GeV. The analysis shows that BR(X(3872)->pi(0)pi(+)pi(-)) can be expected at the level of 10(-3)- 10(-4). This estimate includes, in particular, the assumption that the S-wave inelastic scattering length vertical bar alpha(D0 (D) over bar0 ->pi+pi-)''vertical bar approximate to 1/(2m(D*+)) approximate to 0.25 GeV-1.
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