Measurement Of Cp Content And Time Dependent Cp Violation In B0 U2192 D D Decays

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Measurement Of Cp Content And Time Dependent Cp Violation In B0 U2192 D D Decays

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Author :
language : en
Publisher:
Release Date : 2008

Measurement Of Cp Content And Time Dependent Cp Violation In B0 U2192 D D 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 2008 with categories.

This dissertation presents the measurement of the Cp-odd fraction and time-dependent CP violation parameters for the B0 → D*+ D*- decay. These results are based on the full BABAR dataset of (467 ± 5) x 106 B$ar{B}$ pairs collected at the PEP-II B Factory at the Stanford Linear Accelerator Center. An angular analysis finds that the CP-odd fraction of the B0 →D*+ D*- decay is Rperpendicular = 0.158 ± 0.028 ± 0.006, where the first uncertainty is statistical, and the second is systematic. A fit to the flavor-tagged, time-dependent, angular decay rate yields C+ = 0.02 ± 0.12 ± 0.02; Cperpendicular = 0.41 ± 0.50 ± 0.08; S+ = -0.76 ± 0.16 ± 0.04; S perpendicular = -1.81 ± 0.71 ± 0.16, for the CP-odd (perpendicular) and CP-even (plus) contributions. Constraining these two contributions to be the same results in C = 0.047 ± 0.091 ± 0.019; S = -0.71 ± 0.16 ± 0.03. These measurements are consistent with the Standard Model and with measurements of sin2? from B0 → (c$ar{c}$)K0 decays.

Measurement Of Cp Content And Time Dependent Cp Violation In B0 D D Decays

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Author :
language : en
Publisher:
Release Date : 2009

Measurement Of Cp Content And Time Dependent Cp Violation In B0 D D 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 2009 with categories.

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 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.

Time Dependent Cp Violation Measurements

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Author : Markus Rohrken
language : en
Publisher:
Release Date : 2013-10-31

Time Dependent Cp Violation Measurements written by Markus Rohrken and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2013-10-31 with categories.

Meaurement Of Cp Content And Time Dependent Cp Violation In B0 D D Decays

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Author : Jacob M. Anderson
language : en
Publisher:
Release Date : 2008

Meaurement Of Cp Content And Time Dependent Cp Violation In B0 D D Decays written by Jacob M. Anderson and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2008 with categories.

Measurement Of Time Dependent Cp Violation In B 0 D D Decays

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Author : Saša Fratina
language : en
Publisher:
Release Date : 2007

Measurement Of Time Dependent Cp Violation In B 0 D D Decays written by Saša Fratina and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2007 with categories.

Measurement Of Time Dependent Cp Violation In B0 2 Eta K0 Decays

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Author :
language : en
Publisher:
Release Date : 2014

Measurement Of Time Dependent Cp Violation In B0 2 Eta K0 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 2014 with categories.

We present a measurement of the time-dependent CP violation parameters in B0 2![eta]'K0 decays. The measurement is based on the full data sample containing 772×106 BB-bar pairs collected at the [Upsilon](4S) resonance using the Belle detector at the KEKB asymmetric-energy e+e- collider. The measured values of the mixing-induced and direct CP violation parameters are: sin 2[phi]1eff = +0.68 " 0.07 " 0.03, A[eta]'K0 = +0.03 " 0.05 " 0.04, where the first uncertainty is statistical and the second is systematic. The values obtained are the most accurate to date. Furthermore, these results are consistent with our previous measurements and with the world-average value of sin 2[phi]1 measured in B0 2!J/[psi]K0 decays.

Measurement Of Time Dependent Cp Violating Asymmetries In B0 K K K0l Decays

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Author : J. C. Chen
language : en
Publisher:
Release Date : 2005

Measurement Of Time Dependent Cp Violating Asymmetries In B0 K K K0l Decays written by J. C. Chen and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2005 with categories.

The authors present preliminary measurements of the Cp asymmetry parameters and CP content in B{sup 0} {yields} K{sup +}K{sup -}K{sub L}{sup 0} decays, with B{sup 0} {yields} {phi}K{sub L}{sup 0} events excluded. In a sample of 227 M B{bar B} pairs collected by the BABAR detector at the PEP-II B Factory at SLAC, they find the CP parameters to be S = 0.07 {+-} 0.28(stat){sub -0.12}{sup +0.11}(syst); C = 0.54 {+-} 0.22(stat){sub -0.09}{sup +0.08}(syst) where the first error is statistical and the second is systematic. Estimating the fraction of CP-odd final states from angular moments analysis in the K{sup +}K{sup -}K{sub S}{sup 0} CP-conjugate final state, f{sub odd}(K{sup +}K{sup -}K{sub L}{sup 0}) = 0.92 {+-} 0.07(stat) {+-} 0.06(syst), they determine sin2{beta}{sub eff} = 0.09 {+-} 0.33(stat){sub -0.14}{sup +0.13}(syst) {+-} 0.10(syst CP-cont) where the last error is due to uncertainty on the CP content.

Measurement Of The Cp Odd Fraction And Time Dependent Cp Violation In The Decay B0 D D At Belle

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Author : Kim Vervink
language : en
Publisher:
Release Date : 2008

Measurement Of The Cp Odd Fraction And Time Dependent Cp Violation In The Decay B0 D D At Belle written by Kim Vervink and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2008 with categories.