Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Constraints for the semileptonic $B \to D^{(*)}$ form factors from
  lattice QCD simulations of two-point correlation functions   In this work we present the first non-perturbative determination of the
hadronic susceptibilities that constrain the form factors entering the
semileptonic $B \to D^{(*)} \ell \nu_\ell $ transitions due to unitarity and
analyticity. The susceptibilities are obtained by evaluating moments of
suitable two-point correlation functions obtained on the lattice. Making use of
the gauge ensembles produced by the Extended Twisted Mass Collaboration with
$N_f = 2+1+1$ dynamical quarks at three values of the lattice spacing ($a
\simeq 0.062, 0.082, 0.089$ fm) and with pion masses in the range $\simeq 210 -
450$ MeV, we evaluate the longitudinal and transverse susceptibilities of the
vector and axial-vector polarization functions at the physical pion point and
in the continuum and infinite volume limits. The ETMC ratio method is adopted
to reach the physical $b$-quark mass $m_b^{phys}$. At zero momentum transfer
for the $b \to c$ transition we get $\chi_{0^+}(m_b^{phys}) = 7.58\,(59) \cdot
10^{-3}$, $\chi_{1^-}(m_b^{phys}) = 6.72\,(41) \cdot 10^{-4}$ GeV$^{-2}$,
$\chi_{0^-}(m_b^{phys}) = 2.58\,(17) \cdot 10^{-2}$ and $\chi_{1^+}(m_b^{phys})
= 4.69\,(30) \cdot 10^{-4}$ GeV$^{-2}$ for the scalar, vector, pseudoscalar and
axial susceptibilities, respectively. In the case of the vector and
pseudoscalar channels the one-particle contributions due to $B_c^*$- and
$B_c$-mesons are evaluated and subtracted to improve the bounds, obtaining:
$\chi_{1^-}^{sub}(m_b^{phys}) = 5.84\,(44) \cdot 10^{-4}$ GeV$^{-2}$ and
$\chi_{0^-}^{sub}(m_b^{phys}) = 2.19\,(19) \cdot 10^{-2}$.

16
The categories of this paper are: stat
37
The categories of this paper are: supr-con
17
The categories of this paper are: q-fin
6
The categories of this paper are: astro-ph
26
The categories of this paper are: bayes-an
4
The categories of this paper are: cond-mat
31
The categories of this paper are: ao-sci
24
The categories of this paper are: dg-ga
29
The categories of this paper are: funct-an
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The categories of this paper are: quant-ph
25
The categories of this paper are: patt-sol
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The categories of this paper are: atom-ph
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The categories of this paper are: cmp-lg
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The categories of this paper are: q-alg
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The categories of this paper are: chao-dyn
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The categories of this paper are: nucl-ex