Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Hadronic B-Decays   Non-leptonic two-body decays are discussed on the basis of a generalized
factorization approach. It is shown that a satisfactory description of numerous
decay processes can be given using the same two parameters a_1^{eff} and
a_2^{eff}. Although in general process-dependent, these parameters are not
expected to change markedly. In fact, within error limits, there is no evidence
for a process dependence in energetic B-decays. The success of factorization
allows the determination of decay constants from non-leptonic decays. For the
D_s meson one obtains f_{D_s}=(234\pm25) MeV, for the D^*_s meson
f_{D_s^*}=(271\pm33) MeV. The ratio a_2^{eff}/a_1^{eff} is positive in B-decays
and negative in D-decays corresponding to constructive and destructive
interference in B^- and D^+ decays, respectively. Qualitatively, this can be
understood considering the different scales or \alpha_s-values governing the
interaction among the outgoing quarks. The running of \alpha_s is also the
cause of the observed strong increase of the amplitude of lowest isospin when
going to low energy transitions.

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The categories of this paper are: math
30
The categories of this paper are: q-alg
21
The categories of this paper are: adap-org
20
The categories of this paper are: acc-phys
5
The categories of this paper are: gr-qc
19
The categories of this paper are: eess
12
The categories of this paper are: nucl-th
31
The categories of this paper are: ao-sci
24
The categories of this paper are: dg-ga
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The categories of this paper are: quant-ph
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The categories of this paper are: chao-dyn
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The categories of this paper are: plasm-ph
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The categories of this paper are: q-fin
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The categories of this paper are: math-ph
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The categories of this paper are: patt-sol
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The categories of this paper are: q-bio