Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Form Factors of Semileptonic $M_{l3}$ Decays   We study in detail the kinematics of semileptonic $M_{l3}$ ($M \rightarrow
M^\prime l \nu$) decay, considering only the new models preserving all the
gauge symmetries of the Standard Model (SM), and assuming that neutrinos are
massless and left-handed as in the SM. And we present a brief review of the
recent theoretical progress on model independent constraints on the form
factors of $M_{l3}$ decays using dispersion relations. Finally we review a new
parton model approach for semileptonic $B \rightarrow D(D^*) l \nu$ decays, by
extending the inclusive parton model and by combining with the results of the
heavy quark effective theory. We also obtain the slope of the Isgur-Wise
function.

31
The categories of this paper are: ao-sci
35
The categories of this paper are: mtrl-th
4
The categories of this paper are: cond-mat
36
The categories of this paper are: cmp-lg
6
The categories of this paper are: astro-ph
22
The categories of this paper are: chao-dyn
37
The categories of this paper are: supr-con
28
The categories of this paper are: alg-geom
7
The categories of this paper are: hep-th
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The categories of this paper are: hep-ex
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The categories of this paper are: econ
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The categories of this paper are: eess
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The categories of this paper are: adap-org
2
The categories of this paper are: math
26
The categories of this paper are: bayes-an
1
The categories of this paper are: cs