The concurrent track evolution algorithm: extension for track finding in the inhomogeneous magnetic field of the HERA-B spectrometer

The concurrent track evolution method, which was introduced in a previous paper, has been further explored by applying it to the propagation of track candidates into an inhomogeneous magnetic field volume equipped with tracking detectors, as is typical for forward B spectrometers like HERA-B or LHCb. Compared to the field-free case, the method was extended to three-dimensional propagation, with special measures necessary to achieve fast transport in the presence of a fast-varying magnetic field. The performance of the method is tested on HERA-B Monte Carlo events with full detector simulation and a realistic spectrometer geometry. (orig.)15 refs.Available from TIB Hannover: RA 2999(98-142) / FIZ - Fachinformationszzentrum Karlsruhe / TIB - Technische InformationsbibliothekSIGLEDEGerman

HERA-B: an experiment to study CP violation in the B system using an internal target at the HERA proton ring

After a description of a proposal for using the HERA facility as B factory by means of an internal target the proposal for an experiment is described, where Cp violation is studied in the decay B"0#->#J/#psi#K_S for B's inclusively produced in pp-interactions at 800 GeV/c. Chapter 2 presents details of the internal target and the components of the de. Prototypes of the internal target together with simple trigger and detector systems have been installed in the HERA proton ring since 1992, and have evolved into fairly sophisticated tools; the experience gained from these tests is summarized in chapter 3. Chapter 4 describes the simulation of the detector, its expected performance, and the physics reach of the experiment. Logistics and costs of the proposed experiment are addressed in chapter 5. (orig./HSI)Available from TIB Hannover / FIZ - Fachinformationszzentrum Karlsruhe / TIB - Technische InformationsbibliothekSIGLEDEGerman