Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Semileptonic decays $B/B_s \to (D^{(*)},D_s^{(*)}) l \nu_l$ in the PQCD
  approach with the lattice QCD input   In this paper, we studied the semileptonic $B/B_s \to (D^{(*)},D_s^{(*)})
l\nu_l$ decays in the framework of the standard model (SM) , by employing the
perturbative QCD (PQCD) factorization formalism combining with the lattice QCD
inputs of the relevant transition form factors. We calculated the branching
ratios ${\cal B}(B_{(s)} \to D_{(s)}^{(*)} l \nu_l )$ with $l=(e,\mu.\tau)$ ,
the ratios of the branching ratios $R(D^{(*)})$ and $R(D_s^{(*)} )$ and other
physical observables $P_\tau(D_{(s)}^{(*)})$, $F_L(D^*_{(s)})$ and
$A_{FB}(\tau)$. The "PQCD+Lattice" predictions for ${\cal B}(B \to D^{(*)}
l\nu_l)$ and $R(D^{(*)})$ do agree well with those currently available
experimental measurements within the errors. For the ratios $R(D_s)$ and
$R(D_s^*)$, the "PQCD+Lattice" predictions agree well with other known
predictions. For both $P_\tau(D^*)$ and $F_L(D^*)$, our theoretical predictions
agree well with the measured values within errors. Our theoretical predictions
about the considered semileptonic $B/B_s$ decays could be tested in the near
future LHCb and the Belle II experiments.

6
The categories of this paper are: astro-ph
10
The categories of this paper are: q-bio
22
The categories of this paper are: chao-dyn
11
The categories of this paper are: hep-lat
29
The categories of this paper are: funct-an
3
The categories of this paper are: physics
17
The categories of this paper are: q-fin
15
The categories of this paper are: nucl-ex
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The categories of this paper are: ao-sci
23
The categories of this paper are: solv-int
35
The categories of this paper are: mtrl-th
2
The categories of this paper are: math
30
The categories of this paper are: q-alg
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The categories of this paper are: supr-con
34
The categories of this paper are: chem-ph
32
The categories of this paper are: atom-ph