Author: S. FukaePublisher:
ISBN:
Category :
Languages : en
Pages : 31
Book Description
A Model Independent Analysis of the Rare B Decay B → Xsl+l-
Author: S. FukaeB Physics: Physics Beyond The Standard Model At The B Factory - Proceedings Of The 1994 International Workshop
Author: S SuzukiPublisher: World Scientific
ISBN: 9814549398
Category :
Languages : en
Pages : 494
Book Description
This volume reviews the recent progress of B physics, and discusses theoretical and experimental aspects of the physics which will be explored at the B factory. CP violation and new physics beyond the Standard Model are the main issues of the discussion.
Heavy Quark Physics
Author: David BlaschkePublisher: Springer Science & Business Media
ISBN: 9783540219217
Category : Science
Languages : en
Pages : 468
Book Description
This volume covers the main topics in heavy flavour physics in a comprehensive yet accessible way. The material is presented as a combination of extensive introductory lectures and more typical contributions. This book will benefit postgraduate students and reseachers alike.
Improved Model Independent Analysis of Semileptonic and Radiative Rare B Decays
Author: Flavor Physics, Proceedings Of Icfp2001
Author: Yue-liang WuPublisher: World Scientific
ISBN: 9814488488
Category : Science
Languages : en
Pages : 505
Book Description
This volume contains many excellent articles presenting the most recent progress in high energy physics and the current interesting problems concerning flavor physics. The reader will see how flavor physics has become a central area of particle physics, with the Standard Model (SM) being subjected to increasingly precise experiments, and why the remaining puzzles in the SM, such as the mechanisms of symmetry breaking and CP violation, as well as fermion mass and mixing generation, all are mysteries hidden in the physics of flavor. The book also shows that flavor physics is likely to be a window for probing new physics beyond the SM for many years to come.
International Conference on Flavor Physics
Author: Yueliang WuPublisher: World Scientific
ISBN: 9812380116
Category : Science
Languages : en
Pages : 505
Book Description
This volume contains many excellent articles presenting the most recent progress in high energy physics and the current interesting problems concerning flavor physics. The reader will see how flavor physics has become a central area of particle physics, with the Standard Model (SM) being subjected to increasingly precise experiments, and why the remaining puzzles in the SM, such as the mechanisms of symmetry breaking and CP violation, as well as fermion mass and mixing generation, all are mysteries hidden in the physics of flavor. The book also shows that flavor physics is likely to be a window for probing new physics beyond the SM for many years to come.
Inclusive Rare B Decays Using Effective Field Theories
Author: Christian BauerPublisher:
ISBN:
Category :
Languages : en
Pages : 0
Book Description
In this thesis we will discuss several properties of rare decays of ' B' mesons. First we discuss properties of the inclusive radiative decay 'B¢' [right arrow] 'Xs'ã, where 'Xs' stands for any hadronic state containing an 's' quark. We extend previous studies of this decay, which included perturbative corrections to order Ã's' and nonperturbative contributions up to order ([Lambda]QCD/' mb')2 and calculate the O ([Lambda]QCD/'mb')3 contributions to this decay. The values of the nonperturbative parameters entering at this order are unknown, leading to uncertainties in the standard model prediction of this decay. We estimate the size of these nonperturbative uncertainties by varying these parameters in the range suggested by dimensional analysis. We also estimate uncertainties arising from a cut on the photon energy which is required experimentally. Another decay mode investigated is 'B¢' [right arrow] ' Xs'3⁄4+3⁄4-. We study the O ([Lambda]QCD/'mb')3 contributions to the leptonic invariant mass spectrum, the forward-backward asymmetry and hadronic invariant mass moments and estimate the resulting uncertainties. We calculate how the size of these uncertainties depend on the value of an experimental cut that has to be applied to eliminate the large background from other 'B' decays. A model independent way to determinate the CKM matrix element @' Vub'@ from the dilepton invariant mass spectrum of the inclusive decay B[right arrow]Xu3⁄4+ n is presented next. We show that cuts required to eliminate the charm background still allow for a theoretically clean way to determine the CKM matrix element @'Vub'@. We also discuss the utility of the 'B¢' [right arrow] 'Xs'3⁄4 +3⁄4- decay rate above the y (2'S') resonance to reduce the resulting uncertainties. Finally, we introduce a novel effective theory valid for highly energetic particles. In decays where the phase space is sufficiently restricted such that final state particles have very high energies compared to their mass, the perturbative as well as nonperturbative series diverge. The effective theory presented allows to sum perturbative Sudakov logarithms in a framework that also incorporates the nonperturbative physics in such limits of phase space.
Study of the Rare Decay B --> Xs L L− at BaBar
Author: Ventzislav B. KoptchevPublisher:
ISBN:
Category : Beta decay
Languages : en
Pages : 368
Book Description
The Search for Rare Non-hadronic B-meson Decays with Final-state Neutrinos Using the BaBar Detector
Author: Dana LindemannPublisher:
ISBN:
Category :
Languages : en
Pages :
Book Description
"This thesis presents the searches for two rare B meson decays: the radiative leptonic decay B+ -> l+ nu gamma (l = e, mu) and the flavor-changing neutral current B -> K(*) nu nubar. These searches use the full dataset collected by the BaBar experiment, which corresponds to almost 500 million BB pairs. After fully reconstructing the hadronic decay of one of the B mesons in Upsilon(4S) -> BB decays, evidence of B+ -> l+ nu gamma or B -> K(*) nu nubar is looked for in the rest of the event. No significant evidence of either signal decay is observed. Model-independent branching-fraction upper limits are set at BR(B ->e nu gamma)17 x10 {-6}, BR(B -mu nu gamma)24 x10 {-6}, and BR(B -l nu gamma)15.6 x10 {-6}, all at the 90% confidence level. These are currently the most stringent published upper limits for B+ - l+ nu gamma. In addition, branching-fraction upper limits are set at BR(B -> K+ nu nubar)3.7 x10 {-5}, BR(B - K0 nu nubar)8.0 x10 {-5}, BR(B - K*+ nu nubar)11.5 x10 {-5}, and BR(B - K*0 nu nubar)9.2 x10 {-5}, all at the 90% confidence level. For additional sensitivity to New Physics contributions, partial B - K(*) nu nubar branching-fraction upper limits are also determined over the full kinematic range." --
Background Suppression in the Study of the Rare Decay B->Xs̳ll− Using Multi-variable Data Analysis
Author: Dion C. McIntoshPublisher:
ISBN:
Category : B mesons
Languages : en
Pages : 86
Book Description