  We explore the electronic structure of paramagnetic CrSBr by comparative
first principles calculations and angle-resolved photoemission spectroscopy. We
theoretically approximate the paramagnetic phase using a supercell hosting spin
configurations with broken long-range order and applying quasiparticle
self-consistent $GW$ theory, without and with the inclusion of excitonic vertex
corrections to the screened Coulomb interaction (QS$GW$ and QS$G\hat{W}$,
respectively). Comparing the quasi-particle band structure calculations to
angle-resolved photoemission data collected at 200 K results in excellent
agreement. This allows us to qualitatively explain the significant broadening
of some bands as arising from the broken magnetic long-range order and/or
electronic dispersion perpendicular to the quasi two-dimensional layers of the
crystal structure. The experimental band gap at 200 K is found to be at least
1.51 eV at 200 K. At lower temperature, no photoemission data can be collected
as a result of charging effects, pointing towards a significantly larger gap,
which is consistent with the calculated band gap of $\approx$ 2.1 eV.
