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Author:
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Languages : en
Pages : 15
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Book Description
We review recent measurements of heavy B hadron states including masses and lifetimes of the B{sub c}− meson as well as excited B states (B**, B**{sub s}). We discuss properties of the B{sub s}° meson such as lifetime, lifetime difference [Delta][Lambda]{sub s}/[Lambda]{sub s} and CP violation in B{sub s}° → J/[psi][phi] decays. We also summarize new measurements of the masses and lifetimes of bottom baryons including the [Lambda]{sub b}° baryon, the [Sigma]{sub b} baryon states as well as the [Xi]{sub b}− and [Omega]{sub b}− baryons.
Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 15
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Book Description
We review recent measurements of heavy B hadron states including masses and lifetimes of the B{sub c}− meson as well as excited B states (B**, B**{sub s}). We discuss properties of the B{sub s}° meson such as lifetime, lifetime difference [Delta][Lambda]{sub s}/[Lambda]{sub s} and CP violation in B{sub s}° → J/[psi][phi] decays. We also summarize new measurements of the masses and lifetimes of bottom baryons including the [Lambda]{sub b}° baryon, the [Sigma]{sub b} baryon states as well as the [Xi]{sub b}− and [Omega]{sub b}− baryons.
Author: Aneesh V. Manohar
Publisher: Cambridge University Press
ISBN: 1009402145
Category : Science
Languages : en
Pages : 205
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Author:
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ISBN:
Category :
Languages : en
Pages : 6
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Book Description
We present recent CDF results on the properties of hadrons containing heavy quarks. These include the measurements of mass, lifetime and relative cross section of the B{sub c} meson and an updated measurement of the B{sub s}° and [Lambda]{sub b}° lifetime. We also summarize new measurements of the mass of the [Sigma]{sub b} baryon. We expect more results from the Tevatron which will accumulate more data until the end of Run II currently scheduled to conclude in 2010.
Author: Stephan Narison
Publisher: Cambridge University Press
ISBN: 1009290312
Category : Science
Languages : en
Pages : 813
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Book Description
This 2004 book provides a pedagogical introduction to the perturbative and non-perturbative aspects of quantum chromodynamics (QCD). The text introduces the basic theory of QCD and its historical development, covering pre-QCD ideas of strong interactions such as the quark and parton models, the notion of colours and the S-matrix approach. The author then discusses gauge theory, techniques of dimensional regularization and renormalization, deep inelastic scattering and hard processes in hadron collisions, hadron jets and e+e- annihilations. Other topics include power corrections and the technologies of the Shifman-Vainshtein-Zakharov operating product expansion. The final parts of the book are devoted to modern non-perturbative approaches to QCD and the phenomenological aspects of QCD spectral sum rules. The book will be a valuable reference for graduate students and researchers in high-energy particle and nuclear physics, both theoretical and experimental. This book has been reissued as an Open Access publication on Cambridge Core.
Author:
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Languages : en
Pages : 8
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Book Description
The study of charm and beauty mesons and baryons provides many opportunities to not only measure and classify their spectroscopic states, but also it serves as a testing ground for aspects of flavor QCD such as heavy quark effective theory and lattice gauge calculations, that are used in precise calculations of masses, lifetimes and cross sections. The Fermilab Tevatron has provided both fixed target and proton--antiproton collider facilities that not only account for the discovery of b-quarks but also have dovetailed well with the b-factories to answer a variety of b-physics questions, some of which were not readily explored at existing e e− and electron-positron colliders. An added feature of the hadron colliders is their large cross-section and high luminosity for production of b-quark states that compliments the high luminosities of the b-factories. We report on the observation of b-hadron states reconstructed using the D0 detector data at the Tevatron Collider. Measurements of the mass and relative rates of neutral excited B{sub d} and B{sub s} mesons, and the discovery of the [Xi]{sub b} baryon are described.
Author: Daniel O'Hanlon
Publisher: Springer
ISBN: 3030022064
Category : Science
Languages : en
Pages : 225
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Book Description
This book highlights two essential analyses of data collected during the LHCb experiment, based on the Large Hadron Collider at CERN. The first comprises the first observation and studies of matter-antimatter asymmetries in two three-body b-baryon decays, paving the way for more precise measurements of the relatively unknown decay properties of b-baryon decays. The second is an analysis of a charged B meson decay to three charged pions, where previously large matter-antimatter asymmetries were observed in a model-independent analysis. Here a model of the decay amplitude is constructed using the unitarity-conserving ‘K-matrix’ model for the scalar contributions, so as to gain an understanding of how the previously observed matter-antimatter asymmetries arise; further, the model’s construction yields the most precise and comprehensive study of this decay mode to date.
Author: O. Schneider
Publisher:
ISBN:
Category :
Languages : en
Pages : 130
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Book Description
This article reports world averages for measurements on b-hadron properties obtained by the Heavy Flavor Averaging Group (HFAG) using the available results as of at the end of 2005. In the averaging, the input parameters used in the various analyses are adjusted (rescaled) to common values, and all known correlations are taken into account. The averages include lifetimes, neutral meson mixing parameters, parameters of semileptonic decays, branching fractions of B decays to final states with open charm, charmonium and no charm, and measurements related to CP asymmetries.
Author: Wei Shu Hou
Publisher: World Scientific
ISBN: 9814492663
Category : Science
Languages : en
Pages : 552
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Book Description
CP violation was first observed in 1964, but only in 1999 did we gain much greater experimental insight. Direct CP violation finally appeared in the form of ε′/ε in the K system. Indirect CP violation in B → J/Ψ Ks decay, the raison d'être for construction of e+e- B factories, was first sniffed out at the proton-antiproton collider. The asymmetric B factories — BABAR at SLAC and BELLE at KEK — were completed, while the symmetric B factory at Cornell was upgraded to CLEO-III. It seems that everyone is positioning himself for the great competition on “B Physics and CP Violation”, racing to unravel the Kobayashi-Maskawa matrix, especially the size and origin of CP phases. The change of millennium provides a dramatic backdrop.To have intensive discussions at the technical level, to create broader interest in the subject, and to maximize interaction between experimenters and theorists, this book starts with the status of B factories: accelerator, detector and physics analysis. Following an overview of B physics and the CKM matrix, it delves into the details of lifetime, spectroscopy and decays, with even more specialized discussions on rare decays, direct and indirect CP violation, factorization and final state interactions, determination of unitarity phases, etc. Topics on ε′/ε, rare K decay, charm and hyperon systems, and various T, CP and CPT tests are also discussed at length. The book closes with the outlook for hadron machines and the prospects for new physics. A special feature is that there are two summary talks, one on experiment and the other on theory. The book is further augmented by two dozen excellent contributed talks.
Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 338
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Book Description
This article reports world averages of measurements of b-hadron, c-hadron, and tau-lepton properties obtained by the Heavy Flavor Averaging Group (HFAG) using results available through the end of 2011. In some cases results available in the early part of 2012 are included. For the averaging, common input parameters used in the various analyses are adjusted (rescaled) to common values, and known correlations are taken into account. The averages include branching fractions, lifetimes, neutral meson mixing parameters, CP violation parameters, parameters of semileptonic decays and CKM matrix elements.
Author: Markus Moch
Publisher:
ISBN:
Category :
Languages : de
Pages : 101
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Book Description
