Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Factorization in Exclusive and Seminclusive Decays and Effective
  Theories for Massless Particles   We prove rigorously factorization in the seminclusive decay $B\to D^{(*)} +
jet$ using the large energy effective theory. It is also shown that this
effective theory is unable to consistently describe completely exclusive
processes, such as the decay $B\to D^{(*)}+\pi(\rho)$, and therefore also
related properties such as factorization. This is due to an oversimplification
of transverse momentum dynamics. We present a variant of the large energy
effective theory, i.e. a new effective theory for massless particles, which
properly takes into account transverse momentum dynamics and is therefore the
natural framework to study exclusive non-leptonic decays. Finally, it is shown
that the collinear instability of the large energy effective theory disappears
when seminclusive observables are considered.

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The categories of this paper are: astro-ph
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The categories of this paper are: math-ph
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The categories of this paper are: cs
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The categories of this paper are: eess
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The categories of this paper are: nucl-th
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The categories of this paper are: alg-geom
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The categories of this paper are: econ
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The categories of this paper are: hep-ex
33
The categories of this paper are: plasm-ph
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The categories of this paper are: adap-org
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The categories of this paper are: bayes-an
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The categories of this paper are: stat
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The categories of this paper are: physics
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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: hep-th