Oppenheimer: the opera

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The Born-Oppenheimer Approximation

where R is the set of nuclear coordinates and r is the set of electronic coordinates. If spin-orbit effects are important, they can be added through a spin-orbit operator Ĥso. Unfortunately, the V̂eN(r,R) term prevents us from separating Ĥ into nuclear and electronic parts, which would allow us to write the molecular wavefunction as a product of nuclear and electronic terms, Ψ(r,R) = Ψ(r)χ(R). W...

The OPERA Experiment

OPERA(Oscillation Project with EmulsiontRacking Apparatus) is a new detector concept, iron(lead)emulsion for a long-baseline neutrino oscillation experiment. This experiment would perform an appearance search for υμ−υτ oscillation in the parameter region indicated by the atmospheric neutrino anomaly. OPERA can run at the Gran Sasso Laboratory in the proposed NGS (Neutrino to Gran Sasso) Beam fr...

Opera postuma

It seems incredible that twelve volumes of medical works written in Morgagni's own handwriting should have been completely lost to sight until 1952, when Professor Adalberto Pazni, combing through the catalogues in the Laurenziana Library in Florence for the names of medieval doctors, should have discovered them by chance. How they came to be there is a story full of interest, a detective story...

Status of the OPERA experiment

The OPERA experiment in the underground Gran Sasso Laboratory (LNGS) has been designed to perform the first detection of neutrino oscillations in direct appearance mode in the muon to tau neutrino channel. The detector is hybrid, being made of an emulsion/lead target and of electronic detectors. It is placed in the CNGS neutrino beam 732 km away from the neutrino source. Runs with CNGS neutrino...