Observation of the Doubly Cabibbo-Suppressed Decay D{sub s}{sup +}{yields}K{sup +}K{sup +}{pi}{sup -}
- Korea University, Seoul (Korea, Republic of)
- Department of Physics, University of Tokyo, Tokyo (Japan)
- Budker Institute of Nuclear Physics, Novosibirsk (Russian Federation)
- Ecole Polytechnique Federale de Lausanne (EPFL), Lausanne (Switzerland)
- University of Sydney, Sydney, New South Wales (Australia)
- Institute for Theoretical and Experimental Physics, Moscow (Russian Federation)
We report the first observation of the doubly Cabibbo-suppressed decay D{sub s}{sup +}{yields}K{sup +}K{sup +}{pi}{sup -} using 605 fb{sup -1} of data collected with the Belle detector at the KEKB asymmetric-energy e{sup +}e{sup -} collider. The branching ratio with respect to its Cabibbo-favored counterpart B(D{sub s}{sup +}{yields}K{sup +}K{sup +}{pi}{sup -})/B(D{sub s}{sup +}{yields}K{sup +}K{sup -}{pi}{sup +}) is (0.229{+-}0.028{+-}0.012)%, where the first uncertainty is statistical and the second is systematic. We also report a significantly improved measurement of the doubly Cabibbo-suppressed decay D{sup +}{yields}K{sup +}{pi}{sup +}{pi}{sup -}, with a branching ratio B(D{sup +}{yields}K{sup +}{pi}{sup +}{pi}{sup -})/B(D{sup +}{yields}K{sup -}{pi}{sup +}{pi}{sup +})=(0.569{+-}0.018{+-}0.014)%.
- OSTI ID:
- 21322825
- Journal Information:
- Physical Review Letters, Vol. 102, Issue 22; Other Information: DOI: 10.1103/PhysRevLett.102.221802; (c) 2009 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 0031-9007
- Country of Publication:
- United States
- Language:
- English
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