Search for Quintessence-Like Pseudoscalar Dark Energy Effects on $^{56}\text{Fe}$ Nuclear Transition Energies in Supernova 1991T

The nature of dark energy remains one of the most important unanswered problems in physics. Here we use observations of the Type Ia supernova 1991T to constrain the recent evolution of a dynamical pseudoscalar quintessence-like field $Q(t)$ by comparing the gamma ray spectra emitted by the $^{56}\te