B Decays
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B Decays
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Author : Sheldon Stone
language : en
Publisher: World Scientific
Release Date : 1994
B Decays written by Sheldon Stone and has been published by World Scientific this book supported file pdf, txt, epub, kindle and other format this book has been release on 1994 with Science categories.
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.
New Physics In B Decays
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Author : Sheldon Stone
language : en
Publisher: World Scientific
Release Date : 2022-04-07
New Physics In B Decays written by Sheldon Stone and has been published by World Scientific this book supported file pdf, txt, epub, kindle and other format this book has been release on 2022-04-07 with Science categories.
The Standard Model (SM) of particle physics has withstood thus far every attempt by experimentalists to show that it does not describe data. We discuss the SM in some detail, focusing on the mechanism of fermion mixing, which represents one of its most intriguing aspects. We discuss how this mechanism can be tested in b-quark decays, and how b decays can be used to extract information on physics beyond the SM. We review experimental techniques in b physics, focusing on recent results and highlighting future prospects. Particular attention is devoted to recent results from b decays into a hadron, a lepton and an anti-lepton, that show discrepancies with the SM predictions — the so-called B-physics anomalies — whose statistical significance has been increasing steadily. We discuss these experiments in a detailed manner, and also provide theoretical interpretation of these results in terms of physics beyond the SM.
B Decays
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Author : Sheldon Stone
language : en
Publisher: World Scientific
Release Date : 1992-03-27
B Decays written by Sheldon Stone and has been published by World Scientific this book supported file pdf, txt, epub, kindle and other format this book has been release on 1992-03-27 with Science categories.
The study of b quarks has now reached a stage where it is useful to review what has been learned so far and also to look at the implications of future studies. The most important observations thus far — measurement of the “B” lifetime, B0 — B0 mixing, and the observation of b→ u transitions, as well as more mundane results on hadronic and semileptonic transitions — are described in detail by experimentalists who have been closely involved with the measurements. Theoretical progress in understanding b quark decays, including the mechanisms of hadronic and semileptonic decays, are described. Synthesizing the experimental and theoretical information, the authors discuss tests of the standard model and measurements of standard model parameters. Possibilities of more extensive tests using measurement of CP violation in the B system are also addressed.
B Decays Revised 2nd Edition
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Author : Sheldon Stone
language : en
Publisher: World Scientific
Release Date : 1994-08-01
B Decays Revised 2nd Edition written by Sheldon Stone and has been published by World Scientific this book supported file pdf, txt, epub, kindle and other format this book has been release on 1994-08-01 with Science categories.
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.
Search For B Decays To Final States With The Eta C Meson
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Author :
language : en
Publisher:
Release Date : 2015
Search For B Decays To Final States With The Eta C Meson written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2015 with categories.
We report a search for B decays to selected final states with the [eta]c meson: B" 2!K"[eta]c[pi]+[pi]-, B" 2!K"[eta]c[omega], B" 2!K"[eta]c[eta] and B" 2!K"[eta]c[pi]0. The analysis is based on 772 × 106 BB-bar pairs collected at the [Upsilon](4S) resonance with the Belle detector at the KEKB asymmetric-energy e+e- collider. We set 90% confidence level upper limits on the branching fractions of the studied B decay modes, independent of intermediate resonances, in the range (0.6-5.3) × 10-4. We also search for molecular-state candidates in the D0D*-bar0 - D-bar0D*0, D0D-bar0 + D-bar0D0 and D*0D*-bar0 + D*-bar0D*0 combinations, neutral partners of the Z(3900)" and Z(4020)", and a poorly understood state X(3915) as possible intermediate states in the decay chain, and set 90% confidence level upper limits on the product of branching fractions to the mentioned intermediate states and decay branching fractions of these states in the range (0.6-6.9) × 10-5.
Large Charmless Yield In B Decays And Inclusive B Decay Puzzles
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Author :
language : en
Publisher:
Release Date : 1996
Large Charmless Yield In B Decays And Inclusive B Decay Puzzles written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1996 with categories.
In recent studies of inclusive $B$ decays, it has been suggested that either $B$ mesons decay much more copiously to final states with no open charm than currently assumed, or $B(D0̂ \to K-̂\pi+̂)$ has to be reduced significantly. This note takes the experimental $B(D0̂ \to K-̂\pi+̂)$ at its face value and estimates $B(b\to$ no open charm) using complementary methods: one accounts for the $c$ quark in $b\to c$ transitions, the other accounts for the $\bar c$ quark in $b\to c\bar c s$ transitions. Through cancellation of errors, the average gives our best estimate of $B(b\to$ no open charm), and the difference measures the consistency. The results of the methods are consistent with each other, strongly suggesting a much enhanced $B(b\to$ no open charm). This observation indicates that non-perturbative QCD effects are probably causing a sizable fraction of the $b\to c\bar cs$ transitions to be seen as charmless $b\to s$ processes, contrary to smaller traditional expectations. This mechanism has generally been overlooked and may explain the existing experimental data within the framework of the standard model. We then briefly discuss implications on baryon production governed by $b\to c\bar cs$ processes, rare hadronic $B$ decays and CP violation studies.
Rare Hadronic B Decays
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Author : Lars Hofer
language : en
Publisher: Sudwestdeutscher Verlag Fur Hochschulschriften AG
Release Date : 2011-04
Rare Hadronic B Decays written by Lars Hofer and has been published by Sudwestdeutscher Verlag Fur Hochschulschriften AG this book supported file pdf, txt, epub, kindle and other format this book has been release on 2011-04 with categories.
The study of rare hadronic B decays at LHCb and at the planned Super-B factories is a valueable tool in the search for new physics. The variety of hadronic decay channels allows for over-constraining measurements of flavour-changing neutral currents. The author discusses several aspects of new physics in rare hadronic B decays. In the first part of the book, the Minimal Supersymmetric Standard Model (MSSM) with Minimal Flavor Violation is analysed. In this model, large effects can occur in rare B decays due to tan(beta)-enhanced corrections which have to be resummed to all orders. The known resummation formulae are generalised beyond the decoupling limit and novel effects in couplings involving genuine supersymmetric particles are studied. In the second part of the book, the possibility of probing new physics in electroweak penguins via hadronic B decays is discussed. Such kind of new physics is suggested by puzzling data in B K, pi decays. The author shows that a measurement of the purely isospin-violating decays Bs phi, pi(rho) could shed light on this puzzle. A model-independent study and a study of concrete well-motivated new physics scenarios are performed.
Exclusive Rare B Decays To Two Light Pseudoscalar Mesons
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Author : Petr Borisovich Gaidarev
language : en
Publisher:
Release Date : 1997
Exclusive Rare B Decays To Two Light Pseudoscalar Mesons written by Petr Borisovich Gaidarev and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1997 with categories.
Limits On Rare B Decays B K Sup And B K
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Author :
language : en
Publisher:
Release Date : 1995
Limits On Rare B Decays B K Sup And B K written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1995 with categories.
The authors report on a search for flavor-changing neutral current decays of B mesons B →??−K{sup {+-}} and B →?+?−K*° using data obtained in the Collider Detector at Fermilab (CDF) 1992--1993 data taking run. To reduce the amount of background in the data the authors use precise tracking information from the CDF silicon vertex detector to pinpoint the location of the decay vertex of the B candidate, and accept only events which have a large decay time. They compare this data to a B meson signal obtained in a similar fashion, but where the muon pairs originate from? decays, and calculate the relative branching ratios. In absence of any indication of flavor-changing neutral current decays they set an upper limits of BR(B →?+?−K{sup {+-}})
B Decays In The Upsilon Expansion
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Author :
language : en
Publisher:
Release Date : 2002
B Decays In The Upsilon Expansion written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2002 with categories.
Theoretical predictions for B decay rates are rewritten in terms of the Upsilon meson mass instead of the b quark mass, using a modified perturbation expansion. The theoretical consistency is shown both at low and high orders. This method improves the behavior of the perturbation series for inclusive and exclusive decay rates, and the largest theoretical error in the predictions coming from the uncertainty in the quark mass is eliminated. Applications to the determination of CKM matrix elements, moments of inclusive decay distributions, and the[bar B][yields] X[sub s][gamma] photon spectrum are discussed.