Measurements Of Direct Cp Violation And Constraints On The Ckm Triangle In B U2192 K Decays
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Measurements Of Direct Cp Violation And Constraints On The Ckm Triangle In B U2192 K Decays
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Author :
language : en
Publisher:
Release Date : 2010
Measurements Of Direct Cp Violation And Constraints On The Ckm Triangle In B U2192 K Decays written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2010 with categories.
We constrain the apex of the Cabibbo-Kobayashi-Maskawa unitarity triangle with measurements of B → K*? amplitudes from analyses of B0 → K+?-?0 and B0 → KS?+?- decays. This constraint is consistent with the world average. The B0 → K+?-?0 decay mode is reconstructed from a sample of 454 million B0$ar{B}$ 0 events collected by the BABAR detector at SLAC. We measure direct CP violation in B0 → K*+?- decays at the level of 3? when measurements from both B0 → K+?-?0 and B0 → KS?+?- decays are combined.
Measurements Of Direct Cp Violation And Constraint On The Ckm Triangle In B K Pi Decays
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Author : Andrew Phillips Wagner
language : en
Publisher:
Release Date : 2010
Measurements Of Direct Cp Violation And Constraint On The Ckm Triangle In B K Pi Decays written by Andrew Phillips Wagner and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2010 with categories.
We constrain the apex of the Cabibbo-Kobayashi-Maskawa unitarity triangle with measurements of B-> K*pi amplitudes from analyses of B0-> K+pi-pi0 and B0-> K_Spi+pi- decays. This constraint is consistent with the world average. The B0-> K+pi-pi0 decay mode is reconstructed from a sample of 454 million B0B0bar events collected by the BABAR detector at SLAC. We measure direct CP violation in B0-> K*+pi- decays at the level of 3 sigma when measurements from both B0-> K+pi-pi0 and B0-> K_Spi+pi- decays are combined.
Measurements Of Direct Cp Violation And Constraints On The Ckm Triangle In B 2 K Pi Decays
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Author :
language : en
Publisher:
Release Date : 2010
Measurements Of Direct Cp Violation And Constraints On The Ckm Triangle In B 2 K Pi Decays written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2010 with categories.
We constrain the apex of the Cabibbo-Kobayashi-Maskawa unitarity triangle with measurements of B → K*[pi] amplitudes from analyses of B0 → K+[pi]-[pi]0 and B0 → KS[pi]+[pi]- decays. This constraint is consistent with the world average. The B0 → K+[pi]-[pi]0 decay mode is reconstructed from a sample of 454 million B0$\bar{B}$ 0 events collected by the BABAR detector at SLAC. We measure direct CP violation in B0 → K*+[pi]- decays at the level of 3[sigma] when measurements from both B0 → K+[pi]-[pi]0 and B0 → KS[pi]+[pi]- decays are combined.
Measurement Of Cp Observables In B D Cpk Decays And Constraints On The Ckm Angle Gamma
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Author :
language : en
Publisher:
Release Date : 2010
Measurement Of Cp Observables In B D Cpk Decays And Constraints On The Ckm Angle Gamma written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2010 with categories.
Using the entire sample of 467 million [Upsilon](4S) 2!B{bar B} decays collected with the BABAR detector at the PEP-II asymmetric-energy B factory at SLAC, we perform a 'GLW' analysis of B{sup ±} 2!D{sup ±} decays, using decay modes in which the neutral D meson decays to either CP-eigenstates or non-CP-eigenstates. We measure the partial decay rate charge asymmetries for CP-even and CP-odd D final states to be A{sub CP+} = 0.25 ± 0.06 ± 0.02 and A{sub CP-} = -0.09 ± 0.07 ± 0.02, respectively, where the first error is the statistical and the second is the systematic uncertainty. The parameter A{sub CP+} is different from zero with a significance of 3.6 standard deviations, constituting evidence for direct CP violation. We also measure the ratios of the charged-averaged B partial decay rates in CP and non-CP decays, R{sub CP+} = 1.18 ± 0.09 ± 0.05 and R{sub CP-} = 1.07 {+-} 0.08 {+-} 0.04. We infer frequentist confidence intervals for the angle [gamma] of the (db) unitarity triangle, for the strong phase difference [delta]{sub B}, and for the amplitude ratio r{sub B}, which are related to the B− 2!D− decay amplitude by r{sub B}e{sup i({delta}{sub b-[gamma]})} = A(B− 2!{bar D}°K−)/A(B− 2!D°K°−). Including statistical and systematic uncertainties, they obtain 0.24
Time Dependent Cp Violation Measurements
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Author : Markus Röhrken
language : en
Publisher: Springer Science & Business Media
Release Date : 2013-10-17
Time Dependent Cp Violation Measurements written by Markus Röhrken and has been published by Springer Science & Business Media this book supported file pdf, txt, epub, kindle and other format this book has been release on 2013-10-17 with Science categories.
This thesis describes a high-quality, high-precision method for the data analysis of an interesting elementary particle reaction. The data was collected at the Japanese B-meson factory KEKB with the Belle detector, one of the most successful large-scale experiments worldwide. CP violation is a subtle quantum effect that makes the world look different when simultaneously left and right and matter and antimatter are exchanged. This being a prerequisite for our own world to have developed from the big bang, there are only a few experimental indications of such effects, and their detection requires very intricate techniques. The discovery of CP violation in B meson decays garnered Kobayashi and Maskawa, who had predicted these findings as early as 1973, the 2008 Nobel prize in physics. This thesis describes in great detail what are by far the best measurements of branching ratios and CP violation parameters in two special reactions with two charm mesons in the final state. It presents an in-depth but accessible overview of the theory, phenomenology, experimental setup, data collection, Monte Carlo simulations, (blind) statistical data analysis, and systematic uncertainty studies.
Measurement Of Direct Cp Violation Parameters In B Pm To J Psi K Pm And B Pm To J Psi Pi Pm Decays With 10 4 Fb 1 Of Tevatron Data
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Author :
language : en
Publisher:
Release Date : 2013
Measurement Of Direct Cp Violation Parameters In B Pm To J Psi K Pm And B Pm To J Psi Pi Pm Decays With 10 4 Fb 1 Of Tevatron Data written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2013 with categories.
The Ckm Matrix And Cp Violation
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Author :
language : en
Publisher:
Release Date : 2004
The Ckm Matrix And Cp Violation written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2004 with categories.
The status of CP violation and the CKM matrix is reviewed. Direct CP violation in B decay has been established and the measurement of sin 2[beta] in [psi]K modes reached 5% accuracy. I discuss the implications of these, and of the possible deviations of the CP asymmetries in b → s modes from that in [psi]K. The first meaningful measurements of [alpha] and [gamma] are explained, together with their significance for constraining both the SM and new physics in B-{bar B} mixing. I also discuss implications of recent developments in the theory of nonleptonic decays for B → [pi]K rates and CP asymmetries, and for the polarization in charmless B decays to two vector mesons.
Measurement Of Cp Violation In B0 To K0 And Of Branching Fraction And Cp Violation In B0 U2192 F0 980 K 0 Atop S
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Author :
language : en
Publisher:
Release Date : 2006
Measurement Of Cp Violation In B0 To K0 And Of Branching Fraction And Cp Violation In B0 U2192 F0 980 K 0 Atop S written by 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 authors measure the time-dependent CP asymmetry parameters in B0 → K+K-K0 based on a data sample of approximately 277 million B-meson pairs recorded at the Y(4S) resonance with the BABAR detector at the PEP-II B-meson Factory at SLAC. They reconstruct two-body B0 decays to ?(1020)K$0top{S}$ and ?(1020)K$0top{L}$. Using a time-dependent maximum-likelihood fit, they measure sin2?eff(?K0) = 0.48 ± 0.28 ± 0.10, and C(?K0) = 0.16 ± 0.25 ± 0.09, where the first error is statistical, and the second is systematic. They also present measurements of the CP-violating asymmetries in the decay B0 → f0(→ ?+?-)K$0top{S}$. The results are obtained from a data sample of 209 x 106 Y(4S) → B$ar{B}$ decays, also collected with the BABAR detector at the PEP-II asymmetric-energy B Factory at SLAC. From a time-dependent maximum-likelihood fit they measure the mixing-induced CP violation parameter S(f0(980)K$0top{S}$) = - sin 2?efff0(980)K$0top{S}$ = -0.95$+0.32top{-0.23}$ ± 0.10 and the direct CP violation parameter C(f0(980)K$0top{S}$) = - 0.24 ± 0.31 ± 0.15, where the first errors are statistical and the second systematic. Finally, they present a measurement of the branching fraction of the decay B0 → f0(→ ?+?-)K$0top{S}$. From a time-dependent maximum likelihood fit to a data sample of 123 x 106 Y(4S) → B$ar{B}$ decays they find 93.6 ± 13.6 ± 6.4 signal events corresponding to a branching fraction of ?(B0 → f0(980)(→ ?+?-)K0) = (6.0 ± 0.9 ± 0.6 ± 1.2) x 10-6, where the first error is statistical, the second systematic, and the third due to model uncertainties.
Observation Of Direct Cp Violation In The Measurement Of The Cabibbo Kobayashi Maskawa Angle Gamma With B To D K Decays
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Author :
language : en
Publisher:
Release Date : 2013
Observation Of Direct Cp Violation In The Measurement Of The Cabibbo Kobayashi Maskawa Angle Gamma With B To D K Decays written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2013 with categories.
Measurements Of The Cp Violation Parameter Sin 2 Beta In B Superscipt 0 Right Arrow J Psi K 0 Over S Decays
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Author :
language : en
Publisher:
Release Date : 2000
Measurements Of The Cp Violation Parameter Sin 2 Beta In B Superscipt 0 Right Arrow J Psi K 0 Over S Decays written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2000 with categories.
In the 110 pb[sup -1] Run I data sample, using three complementary flavor-tagging algorithms CDF has made a new measurement of the CP-violating asymmetry sin(2[beta])=0.79[sup +0.41][sub -0.44], This corresponds to the limit sin(2[beta])>-0.08 at 95% confidence level. This result agrees well with predictions from indirect constraints based on fits of elements of the CKM matrix.