Download or read book Recent BaBar Results on B Decays written by and published by . This book was released on 2011 with total page 6 pages. Available in PDF, EPUB and Kindle. Book excerpt: Several recent key results from the BABAR experiment are presented, most using 383.6 fb−1 of data. In particular, the search for B → ?+?, inclusive and exclusive measurements of.
Download or read book Recent BaBar Results on CP Violation in B Decays written by and published by . This book was released on 2014 with total page 5 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book New Physics In B Decays written by Sheldon Stone and published by World Scientific. This book was released on 2022-04-07 with total page 232 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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.
Download or read book Recent Results in Charmless Hadronic B Decays With BaBar written by and published by . This book was released on 2014 with total page 4 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Recent Results in Electroweak B Decays from the BaBar Experiment written by Karsten Koeneke and published by . This book was released on 2006 with total page 3 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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}.
Download or read book Recent Results on Rare B Decays from BABAR and BELLE written by and published by . This book was released on 2003 with total page 5 pages. Available in PDF, EPUB and Kindle. Book excerpt: The PEP-II and KEK asymmetric B factories are providing the BaBar and BELLE collaborations large samples of B mesons, enabling high-statistics searches for rare B decays. The rates for some of these decays can be enhanced by contributions from new physics, while others can provide constraints on the Unitarity Triangle. The author reviews a variety of recent results on rare B decays from these two experiments.
Download or read book Flavor Changing Neutral Current B Decays at BaBar written by and published by . This book was released on 2004 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Recent BaBar results on rare B decays involving flavour-changing neutral currents are presented. New measurements of the CP asymmetries in b [yields] s[gamma] decays are reported as well as b [yields] sl[sup +]l[sup -] branching ratio measurements.
Download or read book New BaBar Results on Rare Leptonic B Decays written by and published by . This book was released on 2003 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: New preliminary BaBar results for rare leptonic decays B[sup -][yields] K[sup -][nu][bar[nu]] and B[sup 0][yields][ell][sup+][ell][sup -] are reported. Using data collected at the[Upsilon](4S) with the BaBar detector, no evidence for a signal was found yielding the corresponding upper limits at the 90% confidence level:[Beta](B[sup -][yields] K[sup -][nu][bar[nu]])
Download or read book Rare B Decays in BABAR written by and published by . This book was released on 2004 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Measurements and searches for rare B decays have been performed with the BaBar detector at the PEP-II e[sup +]e[sup -] asymmetric B Factory, operating at the [Upsilon](4S) resonance. The authors report some recent branching fraction measurements on hadronic and radiative B decays, occurring from b --> s/d and b --> u transitions. Most of the results presented here are based on a data sample corresponding to a luminosity of 81.9 fb[sup -1].
Download or read book Recent Results in Semileptonic B Decays with BaBar written by and published by . This book was released on 2012 with total page 8 pages. Available in PDF, EPUB and Kindle. Book excerpt: In this note, recent results of studies of semileptonic B meson decays from BABAR are discussed and preliminary results given. In particular, a recent measurement of?(B → D{sup (*)}??) and the ratio?(B → D{sup (*)}??)/?(B → D{sup (*)}l?) is presented. For the D* mode, a branching fraction of 1.79 ± 0.13(stat) ± 0.17(syst) is found, with a ratio of 0.325 ± 0.023(stat) ± 0.027(syst). For the D mode, the results are 1.04 ± 0.12(stat) ± 0.14(syst) and 0.456 ± 0.053(stat) ± 0.056(syst), respectively. In addition, a study of B{sub s} production and semileptonic decays using data collected in a center-of-mass energy region above the?(4S) resonance is discussed. The semileptonic branching fraction?(B{sub s} → l?X) is measured to be 9.9{sub -2.1}{sup +2.6}(stat){sub -2.0}{sup +1.3}(syst).
Download or read book BABAR Results on the Decays B K L L and B K L L written by and published by . This book was released on 2003 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The authors present preliminary results on a search for the rare decays B[yields] K[ell][sup+][ell][sup -] and B[yields] K*[ell][sup+][ell][sup -] performed with the BABAR experiment at the PEP-II B Factory. The data set consists of approximately 60 million[Upsilon](4S)[yields] B[bar B] decays.
Download or read book Rare Radiative and Leptonic B Decays Recent Results from BaBar and Belle written by and published by . This book was released on 2003 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Recent BABAR and Belle results on rare B decays involving photons or lepton pairs are reviewed. New preliminary limits from both experiments for B[yields][rho][gamma] and B[sup 0][yields][Omega][gamma], and from BABAR for B[sup -][yields] K[sup -][nu][bar[nu]] and B[sup+][yields][tau][sup+][nu][sub[tau]] are presented. Also summarized from the past year are Belle measurements of B[yields] X[sub s][ell][sup+][ell][sup -] and B[sup 0][yields] K*[sub 2](1430)[sup 0][gamma], preliminary BABAR measurements of B[yields] X[sub s][gamma], and preliminary results from BABAR and Belle on B[yields] K[sup (*)][ell][sup+][ell][sup -]. No significant deviations from Standard Model predictions have yet been found.
Download or read book Two and Three Body Charmless B Decays at BaBar written by and published by . This book was released on 2012 with total page 6 pages. Available in PDF, EPUB and Kindle. Book excerpt: We report recent measurements of rare charmless B decays performed by BaBar. The results are based on the final BaBar dataset of 424 fb−1 collected at the PEP-II B-factory based at the SLAC National Accelerator Laboratory. The study of rare B decays is a key ingredient to meet two of the main goals of the B-factories: assessing the validity of the Cabibbo-Kobayashi-Maskawa (CKM) picture of CP-violation by precisely measuring the elements of the Unitarity Triangle (UT), and searching for hints of New Physics (NP), or otherwise constraining NP scenarios, in processes which are suppressed in the Standard Model (SM). In loop processes, in particular, NP at some higher energy scale may manifest itself in the low energy effective theory as new couplings, such as those introduced by new very massive virtual particles in the loop. In NP searches hadronic uncertainties can play a major role, expecially for branching fraction measurements. Many theoretical uncertainties cancel in ratios of amplitudes, and most NP probes are therefore of this kind. In the following sections we report recent measurements, performed by the BaBar Collaboration, that are relevant to NP searches in charmless hadronic B decays.
Download or read book BABAR Results on CP Violation in B Decays written by and published by . This book was released on 2013 with total page 7 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Leptonic B Decays at BaBar written by and published by . This book was released on 2011 with total page 5 pages. Available in PDF, EPUB and Kindle. Book excerpt: We will present the most recent results on leptonic B decays B{sup {+-}(0)} 2!K*{sup {+-}(0)}[nu]{bar [nu]} and B{sup {+-}} 2![mu]{sup {+-}}{nu}, based on the data collected by the BaBar detector at PEP-II, an asymmetric ee− collider at the center of mass energy of the [Upsilon](4S) resonance. Rare B decays have always been a standard probe for New Physics (NP) searches. The very low Standard Model (SM) rate of these decays often make them unaccessible with the present experimental datasets, unless NP effects enhance the rate up to the current experimental sensitivity. Moreover, as NP effects can modify the decay kinematic, particular attention must be paid in order to perform a model independent analysis. A B-Factory provides an unique environment to investigate these processes. The high number of B{bar B} pairs produced by a B-Factory often allows to approach the needed experimental sensitivity. Moreover, the clean environment and the closed kinematic of the initial state enable to obtaining a very pure sample where to look for these decays.
Download or read book B Decays at BaBar written by and published by . This book was released on 2003 with total page 10 pages. Available in PDF, EPUB and Kindle. Book excerpt: We present branching fraction and CP asymmetry results for a variety of B decays based on up to 56.4 fb1 collected by the BABAR experiment running near the [Upsilon](4S) resonance at the PEP-II ee− B-factory.
