35,150 research outputs found
Non-Leptonic Two Body B Decays in QCD
We review the current status of theoretical study of non-leptonic two body B
decays. There are two independent directions for this purpose. One is the so
called QCD factorization approach (or BBNS approach), which is based on naive
factorization approach. The other one is named perturbative QCD approach. We
list the different ideas and applications of the two method, and make a
comparison between the two.Comment: 12 pages, including 2 figures, invited talk given at International
Conference on Flavor Physics (ICFP 2001), Zhang-Jia-Jie City, Hunan, China,
31 May - 6 Jun 200
Calculation of Direct CP Violation in B Decays
Using the generalized factorization approach, we calculate the CP asymmetries
of charmless B decays. A number of decay channels has large CP asymmetries,
which can be measured in the B factories.Comment: 8 pages, LaTex, 1 figure, Invited Talk given at the 3rd International
Conference on B Physics and CP Violation, Taipei, Dec. 3 - 7, 1999, to appear
in the proceeding
Study light scalar meson property from heavy meson decays
In the SU(3) symmetry limit, the ratio is
equal to 1 if the scalar mesons are states, while it is 3 if these
mesons are tentraquark states. This ratio provides a model-independent way to
distinguish the descriptions for light scalar mesons . It also applies to the
and decays. The SU(3)
symmetry breaking effect is found to be under control, which will not spoil our
method. The branching fractions of the ,
and decays roughly have the order ,
and , respectively. The B factory experiments and ongoing
BEPC-II experiments are able to measure these channels and accordingly to
provide the detailed information of the scalar meson inner structure.Comment: 5 pages, talk given at 45th Rencontres de Moriond QCD and High Energy
Interactions, March 2010, La Thuile and XIII International Conference on
Hadron Spectroscopy, Florida, 200
Branching Ratio and Polarization of Decays in Perturbative QCD Approach
In this work, we calculated the branching ratios, polarization fractions and
CP asymmetry of decay modes in the Perturbative
QCD approach, which is based on factorization. After
calculation, we find the the branching ratios of , and are at the order of ,
and their longitudinal polarization fractions are more than 90%. The above
results agree with BarBar's measurements. We also predict the branching ratios
and polarizations of , and , which will be measured in future. We predicted the CP
asymmetry of and , which will
play important role in determining angle .Comment: 13 pages, 4 figure
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