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Radiative Penguin Decays from Babar

Radiative Penguin Decays from Babar
Author:
Publisher:
Total Pages: 6
Release: 2003
Genre:
ISBN:

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Electroweak penguin decays provide a promising hunting ground for Physics beyond the Standard Model (SM). The decay B 2!X{sub s}[gamma], which proceeds through an electromagnetic penguin loop, already provides stringent constraints on the supersymmetric (SUSY) parameter space. The present data samples of H" x 108 B{bar B} events allow to explore radiative penguin decays with branching fractions of the order of 10−6 or less. In this brief report they discuss a study of B 2!K*ll− decay modes and a search for B 2![rho]([omega])[gamma] decays.


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.


Electroweak Penguin and Leptonic Decays at BaBar

Electroweak Penguin and Leptonic Decays at BaBar
Author: F. Bucci
Publisher:
Total Pages: 5
Release: 2005
Genre:
ISBN:

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Recent BABAR results on electroweak penguin and leptonic decays are reviewed. In particular, the measurements of B {yields} K{sup (*)}l{sup +}l{sup -} and the preliminary results on B {yields} X{sub s}l{sup +}l{sup -} are presented. Also summarized are the preliminary limits on B{sup +} {yields} l{sup +}{nu} (l = e, {mu}) and B{sup +} {yields} K{sup +}{nu}{bar {nu}}.


Search for Exclusive Electroweak Penguin Decays at BABAR.

Search for Exclusive Electroweak Penguin Decays at BABAR.
Author:
Publisher:
Total Pages: 5
Release: 2003
Genre:
ISBN:

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This dissertation describes the search for the flavor-changing neutral current decays B → Kll− and B → K*(892)l+l−, performed using a sample of (22.7 ± 0.4) x 106?(4S) → B {bar B} decays collected with the BABAR detector at the PEP-II B Factory. The following final states have been reconstructed: B+ → K+l+l−, B° → K°l+l− (K{sub s}° →?+?−), B+ → K*+l+l− (K*+ → K{sub s}°?+), and B° → K*°l+l− (K*° → K+?−), where l+l−is either an e+e− or?+?− pair. The established 90% C.L. upper limits are:?(B → Kl+l−)


Fundamental Interactions

Fundamental Interactions
Author: A. Astbury
Publisher: World Scientific
Total Pages: 397
Release: 2006
Genre: Science
ISBN: 9812772545

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This proceedings volume contains the latest developments in particle physics in collider experiments. The contributions cover new results such as the production of quark-gluon plasma in the heavy-ion collider, the new techniques for precision measurement at low energies, and the status of neutrino physics at various laboratories including the new facilities that are at the planning stage. Sample Chapter(s). Chapter 1: Making Precision Measurements at Hadron Colliders: Two Lectures (1,408 KB). Contents: Making Precision Measurements at Hadron Colliders: Two Lectures (H J Frisch); Evidence for a QuarkOCoGluon Plasma at RHC (J Harris); Neutrino Physics: A Selective Overview (S Oser); Low-Energy Tests of the Standard Model (M Pospelov); Leptonic B Decays (M-C Chang); Cosmic Neutrinos Beyond the Standard Model (U Harbach); Proton Structure from HERA (K Nagano); New Phenomena Searches at CDF (A Soha); Electroweak Results at LEP2 (P Spagnolo); and other papers. Readership: Graduate students, academics and researchers in particle and nuclear physics."


Fundamental Interactions - Proceedings Of The 21st Lake Louise Winter Institute

Fundamental Interactions - Proceedings Of The 21st Lake Louise Winter Institute
Author: Alan Astbury
Publisher: World Scientific
Total Pages: 397
Release: 2006-12-29
Genre: Science
ISBN: 9814476633

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This proceedings volume contains the latest developments in particle physics in collider experiments. The contributions cover new results such as the production of quark-gluon plasma in the heavy-ion collider, the new techniques for precision measurement at low energies, and the status of neutrino physics at various laboratories including the new facilities that are at the planning stage.


Recent Results in Electroweak B Decays from the BaBar Experiment

Recent Results in Electroweak B Decays from the BaBar Experiment
Author: Karsten Koeneke
Publisher:
Total Pages: 3
Release: 2006
Genre:
ISBN:

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A review of the most recent BABAR results on electroweak penguin B decays is presented. The focus of this paper is on the measurement of observables in the decays B {yields} X{sub s}{gamma}, B {yields} K{sup (*)}l{sup +}l{sup -} B {yields} K{sub s}{sup 0}{pi}{sup 0}{gamma} (time-dependent analysis) and B {yields} ({rho}/{omega}){gamma}.