Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Fits of Weak Annihilation and Hard Spectator Scattering Corrections in
  $B_{u,d}\to VV$ Decays   In this paper, the contributions of weak annihilation and hard spectator
scattering in $B\to \rho K^*$, $ K^* \bar{K}^*$, $\phi K^*$, $\rho\rho$ and
$\phi\phi$ decays are investigated within the framework of QCD factorization.
Using the experimental data available, we perform $\chi^2$ analyses of
end-point parameters in four cases based on the topology-dependent and
polarization-dependent parameterization schemes. The fitted results indicate
that: (i) In the topology-dependent scheme, the relation
$(\rho_A^{i},\phi_A^{i})\neq (\rho_A^{f},\phi_A^{f})$ gotten through $B\to PP$
and $PV$ decays is favored by the penguin-dominated $B\to VV$ decays at 95\% C.
L., (ii) The large hard spectator scattering corrections and/or the
simplification $ (\rho_H,\phi_H)= (\rho_A^{i},\phi_A^{i})$ are challenged by
${\cal B}(\bar{B}^0\to \rho^0 \rho^0)$, even though they are allowed by $B\to
PP$ and $PV$ decays and helpful for resolving "$\pi\pi$ puzzle", (iii) In the
polarization-dependent scheme, the relation $(\rho_A^{L},\phi_A^{L})\neq
(\rho_A^{T},\phi_A^{T})$ is always required. Moreover, we have updated the
theoretical results for $B\to VV$ decays with the best-fit values of end-point
parameters. A few observables, such as the ones of pure annihilation $B_d\to
\phi \phi$ decay, are also identified for probing the annihilation corrections.

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The categories of this paper are: physics
33
The categories of this paper are: plasm-ph
30
The categories of this paper are: q-alg
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The categories of this paper are: nucl-ex
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The categories of this paper are: nlin
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The categories of this paper are: ao-sci
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The categories of this paper are: cs
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The categories of this paper are: stat
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The categories of this paper are: chao-dyn
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The categories of this paper are: chem-ph
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The categories of this paper are: astro-ph
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The categories of this paper are: adap-org
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The categories of this paper are: eess
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The categories of this paper are: mtrl-th
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The categories of this paper are: atom-ph
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The categories of this paper are: cmp-lg