Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Semileptonic B Decays into Excited Charmed Mesons ($D_1$, $D^*_2$) in
  HQEFT   Exclusive semileptonic B decays into excited charmed mesons ($D_1$, $D^*_2$)
are studied up to the order of $1/m_Q$ in the framework of the heavy quark
effective field theory (HQEFT), which contains the contributions of both
particles and antiparticles. Two wave functions $\eta^b_0$ and $\eta^c_0$,
which characterize the contributions from the kinematic operator at the order
of $1/m_Q$, are calculated by using QCD sum rule approach in HQEFT. Zero recoil
values of other two wave functions $\kappa'_1$ and $\kappa'_2$ are extracted
from the excited charmed-meson masses. Possible effects from the spin-dependent
transition wave functions which arise from the magnetic operators at the order
of $1/m_Q$ are analyzed. It is shown that the experimental measurements for the
branching ratios of $B \to D_1 l\nu$ and $B \to D^*_2 l\nu$ can be understood
in the framework of HQEFT.

12
The categories of this paper are: nucl-th
8
The categories of this paper are: hep-ex
11
The categories of this paper are: hep-lat
3
The categories of this paper are: physics
23
The categories of this paper are: solv-int
31
The categories of this paper are: ao-sci
32
The categories of this paper are: atom-ph
26
The categories of this paper are: bayes-an
1
The categories of this paper are: cs
20
The categories of this paper are: acc-phys
18
The categories of this paper are: econ
37
The categories of this paper are: supr-con
17
The categories of this paper are: q-fin
22
The categories of this paper are: chao-dyn
35
The categories of this paper are: mtrl-th
4
The categories of this paper are: cond-mat