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The pure annihilation type decays $B^0\rightarrow D_{s}^{-}K_{2}^{*+}$ and $B_{s}\rightarrow \bar{D}a_{2}$ in perturbative QCD approach
High Energy Physics - Phenomenology · Submitted 14 Apr 2012
abstract compiled · 2026-09-23 · no language-model review
The authors' main claim They are large enough to be measured in the ongoing experiment.
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The abstract, sentence by sentence
We calculate the branching ratios of pure annihilation type decays $B^0\rightarrow D_{s}^{-}K_{2}^{*+}$ and $B_s\rightarrow \bar{D}a_{2}$ using the perturbative QCD approach based on $k_T$ factorization. The branching ratios are predicted to be $(60.6_{-16.5\,-10.4\,-2.1}^{+17.3\,+4.3\,+3.2}) \times 10^{-6}$ for $B^0\rightarrow D_{s}^{-}K_{2}^{*+}$, $(1.1_{-0.4\,-0.2\,-0.1}^{+0.4\,+0.1\,+0.1})\times 10^{-6}$ for $B_s\rightarrow \bar{D}a_{2}^{0}$ and $(2.3_{-0.8\,-0.4\,-0.1}^{+0.8\,+0.2\,+0.1})\times 10^{-6}$ for $B_{s}\rightarrow D^{-}a_{2}^{+}$. They are large enough to be measured in the ongoing experiment. Due to the shortage of contributions from penguin operators, there are no direct CP asymmetries for these decays in the standard model. We also derive simple relations among these decay channels to reduce theoretical uncertainties for the experiments to test the accuracy of theory and search of new physics signal.
background contribution method result interpretation main claim
| # | sentence | role | the authors' own work | states the main conclusion | strength |
|---|---|---|---|---|---|
| s0 | We calculate the branching ratios of pure annihilation type decays $B^0\rightarrow D_{s}^{-}K_{2}^{*+}$ and $B_s\rightarrow \bar{D}a_{2}$ using the perturbative QCD approach based on $k_T$ factorization. | contribution 0.93 | 0.95 | 0.11 | asserted 0.99 |
| s1 | The branching ratios are predicted to be $(60.6_{-16.5\,-10.4\,-2.1}^{+17.3\,+4.3\,+3.2}) \times 10^{-6}$ for $B^0\rightarrow D_{s}^{-}K_{2}^{*+}$, $(1.1_{-0.4\,-0.2\,-0.1}^{+0.4\,+0.1\,+0.1})\times 10^{-6}$ for $B_s\rightarrow \bar{D}a_{2}^{0}$ and $(2.3_{-0.8\,-0.4\,-0.1}^{+0.8\,+0.2\,+0.1})\times 10^{-6}$ for $B_{s}\rightarrow D^{-}a_{2}^{+}$. | result 1.00 | 0.92 | 0.50 | asserted 0.85 |
| s2 | They are large enough to be measured in the ongoing experiment. | interpretation 0.99 | 0.44 | 0.19 | asserted 0.95 |
| s3 | Due to the shortage of contributions from penguin operators, there are no direct CP asymmetries for these decays in the standard model. | result 0.85 | 0.58 | 0.08 | asserted 1.00 |
| s4 | We also derive simple relations among these decay channels to reduce theoretical uncertainties for the experiments to test the accuracy of theory and search of new physics signal. | contribution 0.87 | 0.96 | 0.14 | asserted 1.00 |
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The paper
Original abstract
We calculate the branching ratios of pure annihilation type decays $B^0\rightarrow D_{s}^{-}K_{2}^{*+}$ and $B_s\rightarrow \bar{D}a_{2}$ using the perturbative QCD approach based on $k_T$ factorization. The branching ratios are predicted to be $(60.6_{-16.5\,-10.4\,-2.1}^{+17.3\,+4.3\,+3.2}) \times 10^{-6}$ for $B^0\rightarrow D_{s}^{-}K_{2}^{*+}$, $(1.1_{-0.4\,-0.2\,-0.1}^{+0.4\,+0.1\,+0.1})\times 10^{-6}$ for $B_s\rightarrow \bar{D}a_{2}^{0}$ and $(2.3_{-0.8\,-0.4\,-0.1}^{+0.8\,+0.2\,+0.1})\times 10^{-6}$ for $B_{s}\rightarrow D^{-}a_{2}^{+}$. They are large enough to be measured in the ongoing experiment. Due to the shortage of contributions from penguin operators, there are no direct CP asymmetries for these decays in the standard model. We also derive simple relations among these decay channels to reduce theoretical uncertainties for the experiments to test the accuracy of theory and search of new physics signal.
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How the literature uses it
5 arXiv papers cite this in 8 sentences
Papers citing it · 6 sentences without a confident label
Cites it as background 2 papers
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In the past few years, the decays involving a scalar meson or a tensor meson in final states have been already explored in different approaches, such as the generalized factorization approach [ref] , QCD factorization (QCDF) [ref] and perturbative QCD approach (PQCD) [ref] .
Calculation of the $B\to K_{0,2}^*(1430)f_0(980)/\sigma$ decays in the Perturbative QCD Approach · Introduction · 0.91
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There are already a few investigations on the $B$ to a pseudoscalar and a tensor [ref] as well as a charmed meson and a tensor meson decays [ref] .
Charmless $B_{u,d,s}\to VT$ decays in perturbative QCD approach · Introduction · 0.93
What it cites · 2 sentences without a confident label
Uses the method or tool of 1 paper
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In this paper, we shall study the pure annihilation type charmed decays $B^0→D_s^-K_2^*+$ and $B_s→D̅a_2$ in the PQCD approach, which is based on the $k_T$ factorization [ref] .
Fat penguins and imaginary penguins in perturbative QCD · Introduction · 0.96
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