Sensitivity of microwave transition in H2O2 to variation of the   electron-to-proton mass ratio
  Recent observation of several microwave transitions in H2O2 from the interstellar medium [Astron. Astrophys., 531, L8 (2011)] raised interest to this molecule as yet another sensitive probe of the tentative variation of the electron-to-proton mass ratio mu. We estimate sensitivity coefficients of the microwave transitions in H2O2 to mu-variation. The largest coefficient for 14.8 GHz transition is equal to 37, which is comparable to highest sensitivities in methanol and an order of magnitude higher than sensitivity of the tunneling transition in ammonia. 
M. G. Kozlov
astro-ph.CO physics.atom-ph