Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: The Light-Front Zero-Mode Contribution to the Good Current in Weak
  Transition   We examine the light-front zero-mode contribution to the good(+) current
matrix elements between pseudoscalar and vector mesons. In particular, we
discuss the transition form factor $f(q^2)$ which has been suspected to have
the light-front zero-mode contribution. While the zero-mode contribution in
principle depends on the form of the vector meson vertex $\Gamma^\mu=\gamma^\mu
- (P_V -2k)^\mu/D$, the form factor $f(q^2)$ is found to be free from the
zero-mode contribution if the denominator $D$ contains the term proportional to
the light-front energy $(k^-)^{n}$ with the power $n>0$. The lack of zero-mode
contribution benefits the light-front quark model phenomenology. We present our
numerical calculations for the $B\to\rho$ transition.

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The categories of this paper are: cond-mat
30
The categories of this paper are: q-alg
18
The categories of this paper are: econ
8
The categories of this paper are: hep-ex
28
The categories of this paper are: alg-geom
36
The categories of this paper are: cmp-lg
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The categories of this paper are: gr-qc
14
The categories of this paper are: math-ph
37
The categories of this paper are: supr-con
19
The categories of this paper are: eess
20
The categories of this paper are: acc-phys
15
The categories of this paper are: nucl-ex
10
The categories of this paper are: q-bio
6
The categories of this paper are: astro-ph
3
The categories of this paper are: physics
1
The categories of this paper are: cs