Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Improved f_{D*_(s)}, f_{B*_(s)} and f_{B_c} from QCD Laplace sum rules   Anticipating future precise measurements of the D- and B-like (semi-)leptonic
and hadronic decays for alternative determinations of the CKM mixing angles, we
pursue our program on the D- and B-like mesons by improving the estimates of
f_{D*_(s)} and f_{B*_(s)} (analogue to f_\pi) by using the well-established
(inverse) Laplace sum rules (LSR) and / or their suitable ratios less affected
by the systematics, which are known to N2LO pQCD and where the complete d = 6
non-perturbative condensate contributions are included. The convergence of the
PT series is analyzed by an estimate of the N3LO terms based on geometric
growth of the coefficients. In addition to the standard LSR variable {\tau} and
the QCD continuum threshold t_c stability criteria, we extract our optimal
results by also requiring stability on the variation of the arbitrary QCD
subtraction point {\mu}. We complete the analysis by a direct estimate of
f_{B_c}. Our results summarized in Tables III and IV are compared with some
other recent estimates.

24
The categories of this paper are: dg-ga
33
The categories of this paper are: plasm-ph
9
The categories of this paper are: nlin
4
The categories of this paper are: cond-mat
13
The categories of this paper are: quant-ph
36
The categories of this paper are: cmp-lg
3
The categories of this paper are: physics
18
The categories of this paper are: econ
37
The categories of this paper are: supr-con
25
The categories of this paper are: patt-sol
10
The categories of this paper are: q-bio
30
The categories of this paper are: q-alg
2
The categories of this paper are: math
32
The categories of this paper are: atom-ph
20
The categories of this paper are: acc-phys
26
The categories of this paper are: bayes-an