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Radiative B to D Penguins

Radiative B to D Penguins
Author:
Publisher:
Total Pages: 6
Release: 2007
Genre:
ISBN:

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This article gives an overview of the recent searches and measurements of b → d penguin transitions with the BaBar experiment. The branching fraction of these decays in the Standard Model (SM) is expected to be a factor of 10 or more lower than the corresponding b → s penguin transitions, but a deviation from the SM prediction would be an equally striking sign of new physics. The exclusive decay B →?ll is searched by BaBar with no excess over the background found. The BaBar measurement of B → (?,?)? provides the first evidence of B →?+?, {sup c} is in good agreement with the previous Belle results and provides a measurement of.


B Decays

B Decays
Author: Sheldon Stone
Publisher: World Scientific
Total Pages: 676
Release: 1994
Genre: Science
ISBN: 9789810218362

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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.


Radiative Penguin Decays at the B Factories

Radiative Penguin Decays at the B Factories
Author:
Publisher:
Total Pages: 4
Release: 2007
Genre:
ISBN:

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In this article, I review the most recent results in radiative penguin decays from the B factories Belle and BABAR. Most notably, I will talk about the recent new observations in the decays B → ([rho]/[omega]) [gamma], a new analysis technique in b → s[gamma], and first measurements of radiative penguin decays in the B°{sub s} meson system. Finally, I will summarize the current status and future prospects of radiative penguin B physics at the B factories.


B Physics & Cp Violation '99, 3rd Intl Conf

B Physics & Cp Violation '99, 3rd Intl Conf
Author: Wei Shu Hou
Publisher: World Scientific
Total Pages: 552
Release: 2000-12-29
Genre: Science
ISBN: 9814492663

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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.


STUDIES OF RADIATIVE PENGUIN DECAYS AT BABAR.

STUDIES OF RADIATIVE PENGUIN DECAYS AT BABAR.
Author:
Publisher:
Total Pages:
Release: 2004
Genre:
ISBN:

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The electromagnetic radiative ''penguin'' decays b [yields] s[gamma], b [yields] d[gamma] are sensitive to physics beyond the Standard Model. The authors present recent studies made with the BABAR detector at the PEP-II asymmetric e[sup +]e[sup -] storage ring.


Radiative And Electroweak Penguin Decays of B.

Radiative And Electroweak Penguin Decays of B.
Author:
Publisher:
Total Pages: 6
Release: 2007
Genre:
ISBN:

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Radiative and electroweak penguin decays of B mesons are flavor-changing-neutral-current processes that provide powerful ways to test the Standard Model at the one-loop level, to search for the effects of new physics, and to extract Standard Model parameters such as CKM matrix elements and quark masses. The large data samples obtained by the B-factory experiments BaBar and Belle, together with an intensive theoretical effort, have led to significant progress towards understanding these rare decays. Recent experimental results include the measurements of the b 2!d[gamma] decays B 2![rho]([omega])[gamma], the observation of B 2!K(*)ll− decays (together with studies of the associated kinematic distributions), and improved measurements of the inclusive B 2!Xs[gamma] rate and photon energy spectrum.