{upsilon}(1S){yields}{gamma}f{sub 2}(1270) decay
Journal Article
·
· Physical Review. D, Particles Fields
- Department of Physics and Astronomy, University of Kentucky, Lexington, Kentucky 40506 (United States)
Decay {upsilon}(1S){yields}{gamma}f{sub 2}(1270) is studied by an approach in which the tensor meson, f{sub 2}(1270), is strongly coupled to gluons. Besides the strong suppression of the amplitude {upsilon}(1S){yields}{gamma}gg, gg{yields}f{sub 2} by the mass of the b-quark, d-wave dominance in {upsilon}(1S){yields}{gamma}f{sub 2}(1270) is revealed from this approach, which provides a large enhancement. The combination of these two factors leads to larger B({upsilon}(1S){yields}{gamma}f{sub 2}(1270)). The decay rate of {upsilon}(1S){yields}{gamma}f{sub 2}(1270) and the ratios of the helicity amplitudes are obtained and they are in agreement with the data.
- OSTI ID:
- 21313522
- Journal Information:
- Physical Review. D, Particles Fields, Journal Name: Physical Review. D, Particles Fields Journal Issue: 11 Vol. 80; ISSN PRVDAQ; ISSN 0556-2821
- Country of Publication:
- United States
- Language:
- English
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