Measurement Of Cp Violation Parameters In B Quark Decays To Charm Anticharm Down Quarks Exclusive Decays At The Babar Experiment
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Measurement Of Cp Violation Parameters In B Quark Decays To Charm Anticharm Down Quarks Exclusive Decays At The Babar Experiment
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Author :
language : en
Publisher:
Release Date : 2003
Measurement Of Cp Violation Parameters In B Quark Decays To Charm Anticharm Down Quarks Exclusive Decays At The Babar Experiment written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2003 with categories.
The BABAR experiment at SLAC provides an opportunity for measurement of CP violation in B decays. A measurement of time-dependent CP violating asymmetries using exclusive B meson decays where the b quark decays to c{bar c}d (including B° 2!D*D*− and B° 2!D*{sup ±}D{sup {-+}} decays) is presented here. This is the first measurement of CP violation in a mode sensitive to the Unitarity Triangle parameter sin2[beta] outside of decays containing charmonium. It provides a comparison to measurements of sin2[beta] using b 2!c{bar c}s, and permits an observation into potential new physics sources of CP violation, such as supersymmetry, via differences between these measurements and those of B° 2!J/[psi] K{sub S}° as statistics of reconstructed neutral B decays to D{sup (*)+} D{sup (*)-} increase. The measured value of the time-dependent CP violating asymmetries are: S = 0.38 ± 0.88(stat) ± 0.12(syst) and C = -0.30 ± 0.50(stat) ± 0.13(syst) for B° 2!D*− D; S = -0.43 ± 1.41(stat) ± 0.23(syst) and C = 0.53 ± 0.74(stat) ± 0.15(syst) for B° 2!D*+ D−; and S = -0.05 ± 0.45(stat) ± 0.05(syst) and C = 0.12 ± 0.30(stat) {+-} 0.05(syst) for B° 2!D*− D+; where S corresponds to CP violation in the interference of mixing and decay and C corresponds to CP violation in decay.
Dissertation Abstracts International
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language : en
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Release Date : 2003
Dissertation Abstracts International written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2003 with Dissertations, Academic categories.
Cern Courier
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language : en
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Release Date : 2012
Cern Courier written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2012 with Nuclear energy categories.
Measurement Of Cp Violation Parameters In B Ccd Exclusive Decays At The Babar Experiment
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Author : Justin E. Albert
language : en
Publisher:
Release Date : 2002
Measurement Of Cp Violation Parameters In B Ccd Exclusive Decays At The Babar Experiment written by Justin E. Albert and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2002 with categories.
Cp Violation In B Decays And The Babar Experiment
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language : en
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Release Date : 2002
Cp Violation In B Decays And The Babar Experiment written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2002 with categories.
During the first year of data taking, the 1999-2000 run, the BABAR detector at the SLAC PEP-II asymmetric collider has collected an integrated luminosity of 20.7 fb[sup -1] corresponding to 22.7 million B[bar B] pairs at the[Upsilon](4S) resonance. Using this data, we present the measurement of sin2[beta] based on samples of B[sup 0][yields] J/[psi] K[sub S][sup 0], B[sup 0][yields][psi](2S) K[sub S][sup 0] and B[sup 0][yields] J/[psi] K[sub L][sup 0] L decays. Our measured value is sin2[beta]= 0.34[+-] 0.20 (stat)[+-] 0.05 (syst). In addition we report on the measurement of branching fractions for exclusive B decays to charmonium final states, measurements of charged and neutral B meson lifetimes and also the B[sup 0][bar B][sup 0] oscillation frequency.
Searches For New Physics In Cp Violation From Babar
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language : en
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Release Date : 2015
Searches For New Physics In Cp Violation From Babar written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2015 with categories.
Results of recent searches for new physics in CP violation in charm decays from the BABAR experiment are presented. These results include a measurement of D0 - anti D0 mixing and searches for CP violation in two-body D0 decays, a search for CP violation in the charm decays D" 2!KS0K " and D s" 2!KS0K", KS0[pi]", and a search for direct CP violation in the singly-Cabibbo suppressed D" 2!K+K-[pi]"decays. These studies are based on the fi nal dataset collected by BABAR at the PEP-II B factory at SLAC in the period 1999-2008. No evidence of CP violation is found in these charm decays. The measured mixing parameter yCP = [0.72 " 0.18(stat) " 0.12(syst)]% excludes the no-mixing null hypothesis with a signifi cance of 3.3[sigma].
Cp Violation And Mixing In Charm Meson Decays From Babar
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Author :
language : en
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Release Date : 2011
Cp Violation And Mixing In Charm Meson Decays From Babar written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2011 with categories.
Mixing and CP violation in charm meson decays provide a unique probe of possible physics beyond the standard model. In this paper, we give a brief review of the current measurements from the BABAR experiment.
A Measurement Of The Cp Parameter Sin2 Using Fully Reconstructed B Cc Decays At The Babar Experiment
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Author : Eric Charles
language : en
Publisher:
Release Date : 2002
A Measurement Of The Cp Parameter Sin2 Using Fully Reconstructed B Cc Decays At The Babar Experiment written by Eric Charles and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2002 with categories.
Measurement Of The Branching Fraction And Search For Direct Cp Violation In The B J Psi Pi Decay Mode At Babar
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Author : Francesco Fobozzi
language : en
Publisher:
Release Date : 2006
Measurement Of The Branching Fraction And Search For Direct Cp Violation In The B J Psi Pi Decay Mode At Babar written by Francesco Fobozzi and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2006 with categories.
The phenomenon of CP-violation in weak interactions, discovered in 1964 in decays of neutral kaons, receives a simple and elegant explanation in the Standard Model with three generations of quarks. Indeed, in this model the common source of CP-asymmetry phenomena is represented by a simple complex phase in the unitary matrix (the Cabibbo-Kobayashi-Maskawa matrix) describing the charged weak couplings of the quarks. This simple scheme has never received an accurate validation, because the phenomenological parameters determined from measurements of CP-violation in kaons decays are related to the fundamental parameters of the theory in a complex way, sensitive to large theoretical uncertainties. On the contrary, decays of neutral B mesons like B{sup 0} {yields} J/{psi} K{sub S}{sup 0} represent a unique laboratory to test the predictions of the theory because they are expected to show significant CP-violation effects, the magnitude of which is cleanly related to the Standard Model parameters. Thus experimental facilities have been built with the purpose of performing extensive studies of B decays. The BABAR experiment is operating at one of these facilities, at the Stanford Linear Accelerator Center. It is collecting data at the PEP-II asymmetric e{sup +}e{sup -} collider (E{sub e{sup -}} = 9.0 GeV; E{sub e{sup +}} = 3.1 GeV), a high-luminosity accelerator machine (L = 3 x 10{sup 33} cm{sup -2}s{sup -1}). The center-of-mass energy (10.58 GeV) of the e{sup +}e{sup -} system at PEP-II allows resonant production of the {Upsilon}(4S), a b{bar b} bound state, which decays almost exclusively in a B{sup 0}{bar B}{sup 0} or a B{sup +}B{sup -} pair. A high-acceptance detector, projected and built by a wide international collaboration, detects and characterizes the decay products of the B mesons. From the analysis of the data collected during the first two years of operation, the BABAR collaboration has established CP-violation in decays of neutral B mesons at the 4.1{sigma} level. Besides the primary goal of CP-violation studies, the high luminosity of PEP-II, coupled with the high acceptance of the BABAR detector, allows competitive studies of the properties of a wide set of B decay modes. In particular, measurements of non-leptonic decays are extremely useful to understand the dynamics of the non-perturbative strong interactions involved in these processes. In this thesis a study of the non-leptonic decay mode B{sup {+-}} {yields} J/{psi}{pi}{sup {+-}} is presented.
Cp Violation Results From B Decays At Babar
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Author :
language : en
Publisher:
Release Date : 2011
Cp Violation Results From B Decays At Babar written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2011 with categories.
In the present paper we review recent experimental results from the BABAR experiment concerning the measurement of the CKM angles. A particular highlight is given to the novel independent determination of the angle [alpha] from B° → a1(1260){sup {+-}}[pi]{sup {-+}} and to the recent full-luminosity updates of several angle [gamma] measurements.