Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Study of the semileptonic decays B->pi, D->pi and D->K   The semileptonic decay B->pi is studied starting from a simple quark model
that takes into account the effect of the B* resonance. A novel, multiply
subtracted, Omnes dispersion relation has been implemented to extend the
predictions of the quark model to all q^2 values accesible in the physical
decay. By comparison to the experimental data, we extract |V_ub|=0.0034 +/-
0.0003(exp.) +/- 0.0007(theory). As a further test of the model, we have also
studied D->pi and D->K decays for which we get good agreement with experiment.

12
The categories of this paper are: nucl-th
31
The categories of this paper are: ao-sci
19
The categories of this paper are: eess
5
The categories of this paper are: gr-qc
13
The categories of this paper are: quant-ph
7
The categories of this paper are: hep-th
15
The categories of this paper are: nucl-ex
9
The categories of this paper are: nlin
34
The categories of this paper are: chem-ph
26
The categories of this paper are: bayes-an
14
The categories of this paper are: math-ph
37
The categories of this paper are: supr-con
25
The categories of this paper are: patt-sol
24
The categories of this paper are: dg-ga
10
The categories of this paper are: q-bio
33
The categories of this paper are: plasm-ph