The Physics of the B Factories

This work is on the Physics of the B Factories. Part A of this book contains a brief description of the SLAC and KEK B Factories as well as their detectors, BaBar and Belle, and data taking related issues. Part B discusses tools and methods used by the experiments in order to obtain results. The results themselves can be found in Part C

Measuring the Antihydrogen Lamb Shift with a Relativistic Antihydrogen Beam," FNAL-Pub-97/426-E, Phys. Rev. D (in press), available at http://publish.aps.org/eprint/gateway/eplist/aps1997dec17

We propose an experiment to measure the Lamb shift and fine structure ͑the intervals 2s 1/2 Ϫ2 p 1/2 and 2 p 1/2 Ϫ2p 3/2 ) in antihydrogen. A sample of 10 000 antihydrogen atoms at a momentum of 8.85 GeV/c suffices to measure the Lamb shift to 5% and the fine structure to 1%. Atomic collisions excite antihydrogen atoms to states with nϭ2; field ionization in a Lorentz-transformed laboratory magnetic field then prepares a particular nϭ2 state, and is used again to analyze that state after it is allowed to oscillate in a region of zero field. This experiment is feasible at Fermilab. ͓S0556-2821͑98͒04711-0

A Test Experiment At The Fermilab Booster To Study The Feasibility Of Fast Antihydrogen Spectroscopy

Atomic antihydrogen has recently been observed at Fermilab [1]. It appears feasible to measure the principal structure, fine structure and Lamb shift of antihydrogen atoms in flight [2]. It is possible to test the proposed techniques and measure cross sections for the relevant atomic processes at relativistic velocities by first using a proton beam. We propose to perform such a test at the FNAL Booster using 8 GeV protons, either in the old transfer line from the Booster to the Main Ring (the proposed "silicon damage" test facility) or in the permanent magnet transfer line to the Main Injector. 1. Introduction CPT invariance is a fundamental assumption of quantum field theory and is widely believed to be an absolute symmetry of nature. The neutral K system provides the most accurate test of CPT invariance in weak interactions; a model dependent estimate of the K 0 K 0 mass difference is less than one part in 10 18 . The equality of proton and antiproton masses is known to one..