Parity violation and critical temperature of non-interacting chiral molecules

Thermodynamical properties of non-interacting chiral molecules are studied under the two-state model in an asymmetric double well potential. The competition between thermal effects, the tunneling process and any pseudoscalar interaction (including electroweak parity violation) is governed by a critical temperature, where the heat capacity displays a maximum and the chiralization and entropy, an inflection point. At temperatures below this critical value, the chiralization is dominant whereas, at higher temperatures, the racemization process is more and more important. The critical values of the entropy and heat capacity are constants and independent of the chiral system under study.