Soft collinear effective theory analysis of B{yields}K{pi}, B{yields}KK, and B{yields}{pi}{pi} decays
- Ernest Orlando Lawrence Berkeley National Laboratory, University of California, Berkeley, California 94720 (United States)
- Department of Physics, Carnegie Mellon University, Pittsburgh, Pennsylvania 15213 (United States)
- Center for Theoretical Physics, Laboratory for Nuclear Science, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139 (United States)
B{yields}K{pi} and related decays are studied in the heavy quark limit of QCD using the soft collinear effective theory (SCET). We focus on results that follow solely from integrating out the scale m{sub b}, without expanding the amplitudes for the physics at smaller scales such as {alpha}{sub s}({radical}(E{sub {pi}}{lambda}{sub QCD})). The reduction in the number of hadronic parameters in SCET leads to multiple predictions without the need of SU(3). We find that the CP-asymmetry in B{sup -}{yields}{pi}{sup 0}K{sup -} should have a similar magnitude and the same sign as the well measured asymmetry in B{sup 0}{yields}{pi}{sup +}K{sup -}. Our prediction for Br(K{sup +}{pi}{sup -}) exceeds the current experimental value at the 2{sigma} level. We also use our results to determine the corrections to the Lipkin and CP-asymmetry sum rules in the standard model and find them to be quite small, thus sharpening their utility as a tool to look for new physics.
- OSTI ID:
- 20869242
- Journal Information:
- Physical Review. D, Particles Fields, Vol. 74, Issue 3; Other Information: DOI: 10.1103/PhysRevD.74.034010; (c) 2006 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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