Whether new data on D{sub s}{yields}f{sub 0}(980)e{sup +}{nu}{sub e} can be understood if f{sub 0}(980) consists of only the conventional qq structure
- School of Science, Tianjin University, Tianjin 300072 (China)
- School of Physics, Nankai University, Tianjin 300071 (China)
Only two isospin-singlet scalar mesons f{sub 0}(600) ({sigma}) and f{sub 0}(980) exist below 1 GeV, so that it is natural to suppose that they are two energy eigenstates which are mixtures of (1/{radical}(2))(uu+dd) and ss. Is this picture right? Generally, it is considered that f{sub 0}(600) mainly consists of (1/{radical}(2))(uu+dd); if so, the dominant component of f{sub 0}(980) should be ss. The recent measurement of the CLEO Collaboration on the branching ratio of D{sub s}{yields}f{sub 0}(980)e{sup +}{nu}{sub e} provides an excellent opportunity to test the structure of f{sub 0}(980), namely, whether the data can be understood as long as it consists of mainly the conventional qq structure. We calculate the form factors of D{sub s}{yields}f{sub 0}(980) in the light-front quark model and the corresponding branching ratio of the semileptonic decay. By fitting the data, we obtain the mixing angle {phi}. The obtained mixing angle shows that the ss component in f{sub 0}(980) may not be dominant.
- OSTI ID:
- 21325245
- Journal Information:
- Physical Review. D, Particles Fields, Vol. 80, Issue 7; Other Information: DOI: 10.1103/PhysRevD.80.074030; (c) 2009 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 0556-2821
- Country of Publication:
- United States
- Language:
- English
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