B physics at the Tevatron: Run II and beyond (original) (raw)
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Nuclear Physics B - Proceedings Supplements, 2008
We review recent measurements of B meson and baryon lifetimes at D0 and CDF with emphasis on results for the Λ b .
B-lifetime measurements at the tevatron
1993
During the run period from May 1992 to the beginning of June 1993 the Collider Detector at Fermilab (CDF) has recorded approx.= 21.4 pb(exp -1) of p(anti p) collider data at (radical)s = 1.8 TeV. For this run the detector had been upgraded which significantly enhanced its b-physics capabilities. The upgrades include a high precision Silicon VerteX detector (SVX) which enables CDF to reconstruct the decay vertex and decay length of b-hadrons. In this article the author reports on several measurements of the lifetime of b-flavored hadrons. The determination of the average b-lifetime using inclusive J/(psi)'s, the measurement of the B(+/-) and B(0) lifetimes by reconstructing exclusive final states including a J/(psi) or (psi)(2S) and a measurement of the B(sub s)(exp 0) meson lifetime exploiting the decay: B(sub s) (yields) l(nu)D(sub s)(+) (yields) l(nu)(phi)(pi)(+) (yields) l(nu)K(+)K(-)(pi)(+).
Considerations on Tevatron Luminosity and Performance:Fnal, November 7 - December 17, 2002
2003
This report contains a loose collection of studies and considerations on various limitations of Tevatron luminosity and performance. These are either analytical calculations, computer simulations, or studies based on an Offline Shot Data Analysis (OSDA) of many stores, using JAVA packages provided by P. Lebrun, S. Panacek, et al. The results of six dedicated or end-of-the-store machine studies performed during my stay at Fermilab are not included and will be published separately. Specifically, the topics we address here comprise the expected and measured luminosity, hourglass effect, dynamic beta function, beam lifetime at injection and in collision, beam losses at the start of the ramp, electron-cloud build up for uncoalesced beams and for Run-IIb, potential-well distortion, intrabeam scattering, and Touschek effect. The treatments of the various subjects strongly differ in completeness and maturity. For example, the results on intrabeam scattering and Touschek scattering look definitive, whereas studies of beam loss and lifetime have not reached a final conclusion.
Exclusive Physics at the Tevatron
Groundbreaking studies of exclusive physics processes at the Tevatron have demonstrated that proton(anti)proton colliders are not only quarkantiquark but also gluongluon colliders, photonphoton and photon-gluon colliders. These studies are briefly reviewed in this paper.