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Languages : en
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The CDF detector at the Tevatron Collider (Fermilab) has collected data from 1992 to 1995. During these years they performed several measurements by using B hadronic decays. All the analysis exploited lepton triggers. The new measurements the authors present here are on radiative B decays B[r-arrow] K[sup 0*][gamma], B[r-arrow][var-phi][gamma] and[Lambda][gamma]. They show also preliminary study for the determination of the branching ratios B[r-arrow] J/[psi]K[sup+][pi][sup+][pi][sup[minus]] and B[r-arrow][chi][sub c] (1P) K[sup+]. In view of Run II they discuss CDF reaches using fully reconstructed B hadronic decays. This is done by scaling the number of events and the efficiencies found in Run I without rely on Monte Carlo simulation whenever it is possible.
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Languages : en
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Book Description
The CDF detector at the Tevatron Collider (Fermilab) has collected data from 1992 to 1995. During these years they performed several measurements by using B hadronic decays. All the analysis exploited lepton triggers. The new measurements the authors present here are on radiative B decays B[r-arrow] K[sup 0*][gamma], B[r-arrow][var-phi][gamma] and[Lambda][gamma]. They show also preliminary study for the determination of the branching ratios B[r-arrow] J/[psi]K[sup+][pi][sup+][pi][sup[minus]] and B[r-arrow][chi][sub c] (1P) K[sup+]. In view of Run II they discuss CDF reaches using fully reconstructed B hadronic decays. This is done by scaling the number of events and the efficiencies found in Run I without rely on Monte Carlo simulation whenever it is possible.
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Languages : en
Pages : 5
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Book Description
The CDF experiment at the Tevatron p{bar p} collider established that extensive and detailed exploration of the b-quark dynamics is possible in hadron collisions, with results competitive and supplementary to those from ee− colliders. This provides a rich, and highly rewarding program that has currently reached full maturity. In the following I report some recent results on hadronic decays: the evidence for the charmless annihilation decay mode B{sub s}° →?+?−, and the first reconstruction in hadron collisions of the suppressed decays B− → D(→ K+?°)K− and B− → D(→ K+?−)?−.
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Languages : en
Pages : 164
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This thesis reports the reconstruction and lifetime measurement of B+, B$0/atop{d}$ and B$0/atop{s}$ mesons, performed using fully reconstructed hadronic decays collected by a dedicated trigger at CDF II experiment. This dedicated trigger selects significantly displaced tracks from primary vertex of p$\bar{p}$ collisions generated at Tevatron collider, obtaining, in this way, huge data samples enriched of long-lived particles, and is therefore suitable for reconstruction of B meson in hadronic decay modes. Due to the trigger track impact parameter selections, the proper decay time distributions of the B mesons no longer follow a simply exponential decay law. This complicates the lifetime measurement and requires a correct understanding and treatment of all the involved effects to keep systematic uncertainties under control. This thesis presents a method to extract the lifetime of B mesons in "ct- biased" samples, based on a Monte Carlo approach, to correct for the effects of the trigger and analysis selections. We present the results of this method when applied on fully re- constructed decays of B collected by CDF II in the data taking runs up to August 2004, corresponding to an integrated luminosity of about 360 pb-1. The lifetimes are extracted using the decay modes B+ 2!$\bar{D}$0[pi]+, B$0\atop{d}$ 2!D-[pi]+, B$0\atop{d}$ 2!D-[pi]+[pi]-[pi]+, B$0\atop{s}$ 2!D$-\atop{s}$[pi]+ and B$0\atop{s}$ 2!D$-\atop{s}$ [pi]+[pi]-[pi]+(and c.c.) and performing combined mass-lifetime unbinned maximum likelihood fits.
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Languages : en
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Silicon Vertex tracks are of fundamental importance for reconstructing B meson decays at a hadron collider. The upgraded CDF detector will deploy an online Silicon Vertex Tracker in the level 2 trigger. We have studied how this new device exploits the Tevatron large B meson production to select hadronic B decays fundamental for measuring CP violation and B{sub s} mixing.
Author: Douglas Corey Reher
Publisher:
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Category :
Languages : en
Pages : 316
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Book Description
Author: Jonathan L. Rosner
Publisher: University of Chicago Press
ISBN: 9780226902289
Category : Science
Languages : en
Pages : 654
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Book Description
In 1947, the first of what have come to be known as "strange particles" were detected. As the number and variety of these particles proliferated, physicists began to try to make sense of them. Some seemed to have masses about 900 times that of the electron, and existed in both charged and neutral varieties. These particles are now called kaons (or K mesons), and they have become the subject of some of the most exciting research in particle physics. Kaon Physics at the Turn of the Millennium presents cutting-edge papers by leading theorists and experimentalists that synthesize the current state of the field and suggest promising new directions for the future study of kaons. Topics covered include the history of kaon physics, direct CP violation in kaon decays, time reversal violation, CPT studies, theoretical aspects of kaon physics, rare kaon decays, hyperon physics, charm: CP violation and mixing, the physics of B mesons, and future opportunities for kaon physics in the twenty-first century.
Author: Mario Campanelli
Publisher: Springer Science & Business Media
ISBN: 3540328416
Category : Science
Languages : en
Pages : 360
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Book Description
This book gathers the proceedings of The Hadron Collider Physics Symposia (HCP) 2005, and reviews the state-of-the-art in the key physics directions of experimental hadron collider research. Topics include QCD physics, precision electroweak physics, c-, b-, and t-quark physics, physics beyond the Standard Model, and heavy ion physics. The present volume serves as a reference for everyone working in the field of accelerator-based high-energy physics.
Author: Sheldon Stone
Publisher: World Scientific
ISBN: 9789810218362
Category : Science
Languages : en
Pages : 676
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Book Description
This 2nd edition is an extensive update of "B Decays?. The revisions are necessary because of the extensive amount of new data and new theoretical ideas. This book reviews what is known about b-quark decays and also looks at what can be learned in the future.The importance of this research area is increasing, as evidenced by the approval of the luminosity upgrade for CESR and the asymmetric B factories at SLAC and KEK, and the possibility of experiments at hadron colliders.The key experimental observations made thus far, measurement of the lifetimes of the different B species, B0-B0 mixing, the discovery of ?Penguin? mediated decays, and the extraction of the CKM matrix elements Vub and Vcb from semileptonic decays, as well as more mundane results, are described in great detail by the experimentalists who have been closely involved with making the measurements. Theoretical progress in understanding b-quark decays using HQET and lattice gauge techniques are described by theorists who have developed and used these techniques.Synthesizing the experimental and theoretical information, several articles discuss the implications for the ?Standard Model? and how further tests can be done using measurements of CP violation in the B system.
Author: Robert N. Cahn
Publisher: Cambridge University Press
ISBN: 0521521475
Category : Science
Languages : en
Pages : 567
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Book Description
A unique presentation of our current understanding of particle physics for researchers, advanced undergraduate and graduate students.
Author: G. Carlino
Publisher: Springer Science & Business Media
ISBN: 884700747X
Category : Science
Languages : en
Pages : 300
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Book Description
This book collects the Proceedings of the Workshop "Incontri di Fisica delle Alte Energie (IFAE) 2007, Napoli, 11-13 April 2007". Presentations, both theoretical and experimental, addressed the status of Physics of the Standard Model and beyond, Flavour physics, Neutrino and Astroparticle physics, and new technology in high energy physics. Special emphasis amid this rich exchange of ideas was given to the expectations of the forthcoming Large Hadron Collider.
