Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Lattice-Constrained Dispersive Bounds for $\bar B^0 \to \pi^+ l^-
  \bar\nu$ Decays   I present a recent piece of work on semileptonic $B \to \pi$ decays in which
lattice results and kinematical and dispersive constraints are combined to
obtain model-independent bounds on the relevant form factors and rates.

8
The categories of this paper are: hep-ex
36
The categories of this paper are: cmp-lg
35
The categories of this paper are: mtrl-th
12
The categories of this paper are: nucl-th
4
The categories of this paper are: cond-mat
21
The categories of this paper are: adap-org
33
The categories of this paper are: plasm-ph
9
The categories of this paper are: nlin
1
The categories of this paper are: cs
19
The categories of this paper are: eess
23
The categories of this paper are: solv-int
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The categories of this paper are: stat
31
The categories of this paper are: ao-sci
6
The categories of this paper are: astro-ph
28
The categories of this paper are: alg-geom
7
The categories of this paper are: hep-th