Study of the Rare Decay of B°->[pi]°[pi]° at BaBar
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Page : pages
File Size : 27,60 MB
Release : 2003
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Page : pages
File Size : 27,60 MB
Release : 2003
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Author : Ventzislav B. Koptchev
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Page : 368 pages
File Size : 31,69 MB
Release : 2004
Category : Beta decay
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Author : Daniel Anthony Bowerman
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Page : pages
File Size : 11,57 MB
Release : 2003
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Author : Dion C. McIntosh
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Page : 86 pages
File Size : 30,71 MB
Release : 2004
Category : B mesons
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Author : J.S. Al-Khalili
Publisher : Springer
Page : 315 pages
File Size : 30,80 MB
Release : 2008-11-14
Category : Science
ISBN : 3540858393
This is the third and ?nal volume in a series of Lecture Notes based on the highlysuccessfulEuroSummerSchoolonExoticBeamsthathasbeenrunning yearly since 1993 (apart from 1999) and is planned to continue to do so. It is the aim of the series to provide an introduction to Radioactive Ion Beam (RIB) physics at the level of graduate students and young postdocs starting out in the ?eld. Each volume contains lectures covering a range of topics from nuclear theory to experiment to applications. Our understanding of atomic nuclei has undergone a major re-orientation over the past two decades and seen the emergence of an exciting ?eld of research: the study of ‘exotic’ nuclei. The availability of energetic beams of short-lived nuclei, referred to as ‘radioactive ion beams’ (RIBs), has opened the way to the study of the structure and dynamics of thousands of nuclear species never before observed in the laboratory. This ?eld has now become one of the most important and fast-moving in physics worldwide. And it is fair to say that Europe leads the way with a number of large international projects starting up in the next few years, such as the FAIR facility at GSI in Germany. From a broader perspective, one must also highlight just how widely RIB physics impacts on other areas, from energy and the environment to medicine and materials science.
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Page : 14 pages
File Size : 28,72 MB
Release : 2002
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The authors report on the evidence for the decays B° → D{sub s}?− and B° → D{sub s}− K+ and the results of a search for the decays B° → D*{sub s}+?− and B° → D*{sub s}− K+ from a sample of 84 million?(4S) decays into B meson pairs collected with the BaBar detector at the PEP II asymmetric-energy e+e− collider. The measured B° → D{sub s}+?− yield has a probability of less than 10−3 to be a fluctuation of the background and they measure the branching fraction?(B° → D{sub s}+?−) = (3.2 ± 0.9(stat.) ± 1.0 (syst.)) x 10−5. The measured B° → D{sub s}− K+ yield has a probability of less than 5 x 10−4 to be a fluctuation of the background and they measure the branching fraction?(B° → D{sub s}− K+) = (3.2 ± 1.0(stat.) ± 1.0(syst.)) x 10−5. They also set 90% C.L. limits?(B° → D*{sub s}+?−)
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Page : 5 pages
File Size : 19,70 MB
Release : 2003
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The BABAR experiment operating at the PEP-II ee− collider is designed to study CP violation effects in the B-meson system. From May 1999 to June 2002 approximately 81 fb−1 of data have been collected at the [Upsilon](4S) resonance, containing (87.9 ± 1.4) Million BB pairs. From this data sample the branching fraction for the decay B° 2![pi]°[pi]° has been extracted using a multi-dimensional maximum likelihood technique. With an efficiency of 20.4%, we find 3614−1{sup +15+1} B° 2![pi]°[pi]° events and measure the branching fraction to be [Beta](B° 2![pi]°[pi]°) = (2.0{sub -0.8-0.2}{sup +0.9+0.3}) x 10−6 where the first error is statistical and the second systematic. The statistical significance is 3.1[sigma] and we report an upper limit of [Beta](B° 2![pi]°[pi]°)
Author : T. Inagaki
Publisher :
Page : 32 pages
File Size : 23,77 MB
Release : 1985
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Page : 19 pages
File Size : 48,14 MB
Release : 2010
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The authors report the study of the B meson decays B{sup ±} 2!J/[psi][phi]K{sup ±}, B° 2!J/[psi][phi]K° using 433 million of B{bar B} events collected at the [Upsilon](4S) resonance with the BABAR detector at the PEP-II ee− asymmetric-energy collider. They obtain the branching fraction measurements: [Beta](B{sup ±} 2!J[psi][phi]K{sup ±}) = (5.6 {+-} 0.9(stat) {+-} 0.3(sys)) x 10−5, [Beta](B{sup {+-}} 2!J[psi][phi]K°) = (5.4 {+-} 1.2(stat) {+-} 0.4(sys)) x 10−5.
Author : Hans Volker Klapdor-kleingrothaus
Publisher : World Scientific
Page : 1559 pages
File Size : 47,37 MB
Release : 2010-03-25
Category : Science
ISBN : 9814470554
In the last 20 years the disciplines of particle physics, astrophysics, nuclear physics and cosmology have grown together in an unprecedented way. A brilliant example is nuclear double beta decay, an extremely rare radioactive decay mode, which is one of the most exciting and important fields of research in particle physics at present and the flagship of non-accelerator particle physics.While already discussed in the 1930s, only in the 1980s was it understood that neutrinoless double beta decay can yield information on the Majorana mass of the neutrino, which has an impact on the structure of space-time. Today, double beta decay is indispensable for solving the problem of the neutrino mass spectrum and the structure of the neutrino mass matrix. The potential of double beta decay has also been extended such that it is now one of the most promising tools for probing beyond-the-standard-model particle physics, and gives access to energy scales beyond the potential of future accelerators.This book presents the breathtaking manner in which achievements in particle physics have been made from a nuclear physics process. Consisting of a 150-page highly factual overview of the field of double beta decay and a 1200-page collection of the most important original articles, the book outlines the development of double beta decay research — theoretical and experimental — from its humble beginnings until its most recent achievements, with its revolutionary consequences for the theory of particle physics. It further presents an outlook on the exciting future of the field.