King, Julian A., Mortlock, Daniel J., Webb, John K., Murphy, Michael T.
Recent attempts to constrain cosmological variation in the fine structure constant, alpha, using quasar absorption lines have yielded two statistical samples which initially appear to be...
Stringent null constraint on cosmological evolution of the proton-to-electron mass ratio (2008)
King, Julian A., Webb, John K., Murphy, Michael T., Carswell, Robert F.
We present a strong constraint on variation of the proton-to-electron mass ratio, mu, over cosmological time scales using molecular hydrogen transitions in optical quasar spectra. Using high quality...
Stringent null constraint on cosmological evolution of the proton-to-electron mass ratio (2008)
King, Julian A., Webb, J. K., Murphy, Michael T., Carswell, R. F.
We present a strong constraint on variation of the proton-to-electron mass ratio mu over cosmological time scales using molecular hydrogen transitions in optical quasar spectra. Using high quality...
Stringent null constraint on cosmological evolution of the proton-to-electron mass ratio (2008)
King, Julian A., Webb, John K., Murphy, Michael T., Carswell, Robert F.
We present a strong constraint on variation of the proton-to-electron mass ratio mu over cosmological time scales using molecular hydrogen transitions in optical quasar spectra. Using high quality...