b-Quark Physics with the LEP Collider: The Development of by Gary John Barker

By Gary John Barker

The e-book studies the unforeseen effect that the LEP experiments have had just about b-quark physics. The emphasis is firmly on telling the tale from an experimental point of view. elements of the detectors that have been crucial for the reconstruction of b-hadrons are highlighted, specially the function performed by way of silicon strip detectors and particle id tools. the significance of fixing functional matters similar to detector alignment and music reconstruction to totally observe the reconstruction strength of the detectors is proven besides quite a few examples of capability difficulties while those elements should not good managed. Barker information new rules and research suggestions that developed in the course of the years of LEP operating in order that the knowledge comes in handy to new researchers or these placing jointly plans for destiny b-physics experiments. Highlights of the ultimate b-physics effects from the LEP collaborations are reviewed within the context of effects from different experiments around the globe and with admire to what we know about the traditional version of Particle Physics.

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An early development goal of the LEP vertex detector groups was to design a strip detector that could provide 3D spatial points. This effort was pioneered by the ALEPH collaboration who developed double-sided devices where the ohmic contact (or n)-side of the device pictured in Fig. 2, was also segmented into strips running in the perpendicular direction to the p-side strips. These devices are complicated to manufacture and early production batches were of varying quality. Because of this OPAL preferred the solution of sticking two single-sided devices, with perpendicular strip orientations, back-to-back.

Nucl. Instr. Meth. , B. : Nucl. Instr. Meth. A 289, 35 (1990) 34 K. Mönig: Rept. Prog. Phys. 61, 999 (1998) 34 35 Chapter 3 Experience in Reconstructing Z0 → bb¯ Events A tremendous amount of experience was gained as a result of extracting the most from the LEP data sets. In this chapter we review the developments that had the largest impact on b-physics analysis. 1 Impact Parameter and Decay Length Central to studies of b-physics at LEP were two reconstructed parameters that were sensitive to the relatively long lifetime of b-hadrons: impact parameter and decay length.

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