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

By Gary John Barker

The e-book reports the unforeseen impression that the LEP experiments have had just about b-quark physics. The emphasis is firmly on telling the tale from an experimental standpoint. points of the detectors that have been crucial for the reconstruction of b-hadrons are highlighted, particularly the function performed through silicon strip detectors and particle id tools. the significance of fixing useful concerns comparable to detector alignment and song reconstruction to completely discover the reconstruction capability of the detectors is established in addition to numerous examples of strength difficulties whilst those points are usually not good managed. Barker info new principles and research ideas that advanced through the years of LEP working in order that the data turns out to be useful 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 all over the world and with appreciate to what we know about the traditional version of Particle Physics.

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Extra info for b-Quark Physics with the LEP Collider: The Development of Experimental Techniques for b-Quark Studies from Z^0-Decay

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12, 225 (2000) 16 25. , G. : Z. Phys. C 72, 1 (1996) 16 26. M. Paulini: Int. J. Mod. Phys. A 14, 2791 (1999) 17 27. LEP/SLD Heavy Flavour Working Group: Final input parameters for the LEP/SLD heavy flavour analyses. LEPHF/2001-01 19 28. , D. : Phys. Lett. B 263, 135–140 (1991) 19 Chapter 2 Silicon Vertex Detectors and Particle Identification The ability to reconstruct the decay vertex of a b-hadron and simultaneously to know the type of particle associated with this vertex were the essential tools of inclusive b-physics at LEP.

Barycentric shift induces jumps at the flipped boundaries between flipped devices in a module and which corresponds to a Lorentz shift of around 6 μm. Barycentric shift is a term coined by DELPHI to describe the effect of ionisation charge not being uniformly released along the trajectory as a charged particle traverses the silicon bulk material. As a consequence, the centre of gravity of the charge cloud arriving at the readout strips no longer corresponds to the mid-plane of the device resulting in a systematic shift in the reconstructed particle crossing coordinates.

G. 7 GeV/c was about 70% with a contamination of about 30% while for protons the number was 70% efficiency for a contamination of 50%. The stable operation and calibration of the DELPHI RICH was a huge technical challenge and many teething problems had to be overcome before the RICH data could contribute to physics results. A beautiful example of the power of a particle identification system containing a RICH capability is shown in Fig. 10. A candidate B− → K0∗ (892) + π− decay is found in DELPHI by reconstructing the decay vertices in the silicon vertex detector and identifying the decay products with high probability by combining dE/dx and RICH information.

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