  A correlation has been reported between the arrival directions of high-energy
IceCube events and gamma-ray blazars classified as intermediate- and
high-synchrotron-peaked BL Lacs. Subsequent studies have investigated the
optical properties of these sources, analyzed public multiwavelength data, and
constrained their individual neutrino emission based on public IceCube data. In
this work, we provide a theoretical interpretation of public multiwavelength
and neutrino point source data for the 32 BL Lac objects in the sample
previously associated with an IceCube alert event. We have performed particle
interaction modeling using open-source numerical simulation software. We
constrained the model parameters using a novel and unique approach that
simultaneously describes the host galaxy contribution, the observed synchrotron
peak, the multiwavelength fluxes, and the IceCube point source constraints. We
show that a single-zone leptohadronic model can describe the multiwavelength
fluxes from the 32 IceCube candidates. In some cases, the model suggests that
hadronic emission may contribute a considerable fraction of the gamma-ray flux.
The required power in relativistic protons ranges from a few percent to a
factor of ten of the Eddington luminosity, which is energetically less
demanding compared to other leptohadronic blazar models in recent literature.
The model can describe the 68% confidence level IceCube flux for a large
fraction of the masquerading BL Lacs in the sample, including TXS 0506+056;
whereas, for true BL Lacs, the model predicts a low neutrino flux in the
IceCube sensitivity range. The predicted neutrino flux peaks between a few PeV
and 100 PeV and scales positively with the flux in the GeV, MeV, X-ray, and
optical bands. Based on these results, we provide a list of the brightest
neutrino emitters, which can be used for future searches targeting the 10-100
PeV regime.
