Measurement of heavy-flavor production in the high-mass dimuon spectrum in pp collisions at $\sqrt{s}=13 {TeV}$ with ALICE.

Studies of the production of heavy-quarks in pp collisions, besides serving as a reference for heavy-ion collisions, represent a powerful tool for testing various aspects of QCD. An analysis technique little explored until now at the LHC energies is the analysis of the high-mass region of the dilepton invariant mass spectrum ({m_{\ell $\ell$ > $m_{J/\Psi}$), significantly populated by the semileptonic decays of hadron pairs containing charm and beauty quarks. Analyses based on Monte Carlo simulations are crucial to reproduce the invariant mass and $p_{T}$ spectra of muon pairs measured at forward rapidity with the ALICE muon spectrometer, as well as to disentangle the contributions from heavy-flavour decays, separately for charm and beauty, and light-flavour hadrons, the latter representing the main background source of this analysis. In this contribution, the results of PYTHIA8 simulations for the contributions coming from charm, beauty, and light-flavours hadrons, will be reported and compared to the $p_{T}$ and mass spectra measured by ALICE in pp collisions at $\sqrt{s}$ = 13 ${TeV}$, based on an integrated luminosity of about $\sim$ 25 ${pb}^{-1}$.