|
| | | | |
| | | |
| Stat |
Members: 3645
Articles: 2'501'711
Articles rated: 2609
20 April 2024 |
|
| | | | |
|
Article overview
| |
|
|
$B o Kpi$ decays | | T. N. Pham
; | | Date: |
17 Aug 2009 | | Abstract: | Though QCD Factorization(QCDF) could produce sufficiently large $B o Kpi$
branching ratios close to experiments, the predicted direct CP asymmetry in
${ar B}^{0} o K^{+}pi^{-}$ decay is however still quite below experiment,
even with a large negative phase in the annihilation term, according to
existing calculations. This suggests the presence of an additional strong phase
in the decay amplitude which could come from the long-distance final state
interactions(FSI) like charming penguin. In this paper, we show that, by adding
to the $B o Kpi$ decay QCDF amplitude, a real part and an absorptive part
with a strength $10% $ and 30% of the penguin amplitude, respectively, we could
bring the
$B o Kpi$ branching ratios and the ${ar B}^{0} o K^{-}pi^{+}$ CP
asymmetry close to the measured values. We also find that the color-allowed
electroweak penguin is appreciable and that from the QCDF electroweak-strong
penguin interference terms and the measured $B^{-} o {ar K}^{0}pi^{-}$ we
obtain $(9.0pm 0.3) imes 10^{-6}$ for the ${ar B}^{0} o {ar
K}^{0}pi^{0}$ branching ratio, a bit lower than experiment. Similarly, the
predicted value for $B^{-} o K^{-}pi^{0}$ in terms of the ${ar B}^{0} o
K^{-}pi^{+}$ branching ratio agrees well with experiment. This suggests that
the measured value for ${ar B}^{0} o {ar K}^{0}pi^{0}$ in fact should be
lower than the current measured value. | | Source: | arXiv, 0908.2320 | | Services: | Forum | Review | PDF | Favorites | |
|
|
No review found.
Did you like this article?
Note: answers to reviews or questions about the article must be posted in the forum section.
Authors are not allowed to review their own article. They can use the forum section.
browser Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.com)
|
| |
|
|
|
|
News, job offers and information for researchers and scientists:
| |
REGISTER