A Measurement Of The Cp Parameter Sin2 Using Fully Reconstructed B Cc Decays At The Babar Experiment

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A Measurement Of The Cp Parameter Sine Two Beta Using Fully Reconstructed B To Ccbar Decays At The Babar Experiment

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Author :
language : en
Publisher:
Release Date : 2003

A Measurement Of The Cp Parameter Sine Two Beta Using Fully Reconstructed B To Ccbar 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.

This dissertation presents a measurement of the time-dependent CP-violating asymmetries in the neutral B-meson system performed with data collected with the BABAR detector at the PEP-II asymmetric-energy B Factory at the Stanford Linear Accelerator Center. The data sample used consists of 29.7 fb−1 collected at the [Upsilon](4S) resonance and 3.9 fb−1 collected off-resonance. We analyze three samples of fully-reconstructed B-meson decays: a sample of decays to CP eigenstates in the modes J/[psi] K{sub s}°, [psi](2S) K{sub s}°, [chi]{sub cl} K{sub s}°, and J/[psi] K*° (822 events); as well as both charged (14304 events) and neutral (10457 events) B decays to flavor-eigenstates including D{sup (*)} and [pi]/[rho]/[alpha]1. In all cases, the proper decay time difference between the reconstructed B-meson and the recoiling B-meson is determined by measuring the separation of the two decay vertices. Furthermore, the flavor of the recoiling B-meson is tagged using a neural network algorithm. We use the flavor-eigenstate samples to calibrate both the vertexing and tagging performance. We measure the amplitude of the CP asymmetry, sin2[beta] = 0.61 ± 0.14(stat) ± 0.06(syst). These results indicate the existence of indirect CP violation in the B-meson system.

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 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.

Measurement Of Cp Violating Parameters In Fully Reconstructed B To D Pi And B To D Rho Decays

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

Measurement Of Cp Violating Parameters In Fully Reconstructed B To D Pi And B To D Rho 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 a preliminary measurement of the CP-violating parameters in fully reconstructed B{sup 0} {yields} D{sup (*){+-}}{pi}{sup {-+}} and B{sup 0} {yields} D{sup {+-}}{rho}{sup {-+}} decays in approximately 232 million {Upsilon}(4S) {yields} B{bar B} decays collected with the BABAR detector at the PEP-II asymmetric-energy B factory at SLAC.

Cp Violation In B Decays And The Babar Experiment

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Author :
language : en
Publisher:
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.

Measurement Of Cp Violating Parameters In Fully Reconstructed B D Pi And B Drho Decays

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Author :
language : en
Publisher:
Release Date : 2004

Measurement Of Cp Violating Parameters In Fully Reconstructed B D Pi And B Drho 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 2004 with categories.

While the measurement of sin2[beta] is now a precision measurement, the constraints on the other two angles of the Unitarity Triangle, [alpha] and [gamma], are still limited by statistics and/or by theoretical uncertainties. This paper reports on the measurement of CP-violating asymmetries in B[sup 0] --> D(*)[sup [+-]][pi][sub [-+]] and B[sup 0] --> D[sup [+-]][rho][sup [-+]] decays in [Upsilon](4S) --> B[bar B] decays, asymmetries which are rleated to sin(2[beta] + [gamma]). This analysis updates the results already published by including a new decay mode (B[sup 0] --> D[sup [+-]][rho][sup [-+]]) and a larger data sample (110 instead of 88 million [Upsilon](4S) --> B[bar B] decays).

Measurement Of Cp Violating Asymmetry Sin2beta With The Babar Detector

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Author :
language : en
Publisher:
Release Date : 2002

Measurement Of Cp Violating Asymmetry Sin2beta With The Babar Detector 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.

The Standard Model of electroweak interactions describes CP violation in weak interactions as a consequence of a complex phase in the three-generation Cabibbo-Kobayashi-Maskawa (CKM) quark-mixing matrix. In this framework, measurements of CP-violating asymmetries in the time distribution of neutral B decays to charmonium final states provide a direct measurement of sin2[beta][2], where[beta][triple-bond] arg[-V[sub cd]V*[sub cb]/V[sub td]V*[sub tb]]. The authors report an updated measurement of time-dependent CP-asymmetries in samples of fully reconstructed B decays to charmonium-containing CP eigenstates (b[yields] c[bar c]s). The data for these studies were recorded at the[Upsilon](4S) resonance with the BABAR detector at the PEP-II asymmetric-energy e[sup+]e[sup -] collider at the Stanford Linear Accelerator Center.

Die Zauberfl Te Op Ra En Deux Actes De Wolfgang Amadeus Mozart Th Tre Du Ch Telet

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Author :
language : en
Publisher:
Release Date : 2009

Die Zauberfl Te Op Ra En Deux Actes De Wolfgang Amadeus Mozart Th Tre Du Ch Telet 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.

Measurement Of Sin 2 Beta In B0 Phi K0 S

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Author :
language : en
Publisher:
Release Date : 2002

Measurement Of Sin 2 Beta In B0 Phi K0 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 2002 with categories.

We present a preliminary measurement of the time-dependent CP-violating asymmetry in the neutral B decay B° →?K{sub s}°, with? → KK− and K{sub s}° →?+?−. The measurement uses a data sample of about 87 million?(4S) → B{bar B} decays collected between 1999 and 2002 with the BABAR detector at the PEP-II asymmetric-energy B Factory at SLAC. In this sample we study events in which the CP final state is fully reconstructed and the flavor of the other neutral B meson is determined from its decay products. The amplitude of the CP-violating asymmetry sin2? is derived from the decay-time distributions. We measure sin2? = -0.19{sub -0.50}{sup +0.52}(stat) ± 0.09(syst).

Babar Explores Cp Violation

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Author :
language : en
Publisher:
Release Date : 2003

Babar Explores 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 2003 with categories.

The most recent results obtained by the BABAR experiment at the PEP-II asymmetric-energy B Factory at SLAC on CP-violating asymmetries and branching fractions for neutral and charged B decays are presented here. The analysis was performed on a data sample of ≈ 88 million?(4S) → B{bar B} decays collected between 1999 and 2002. Using b → c{bar c}s decays, we measure sin2? = 0.741 ± 0.067(stat) ± 0.034(syst). We also present sin2? measurements from, b → s{bar s}s and b → c{bar c}d processes. From neutral B meson decays to two-body final states of charged pions and kaons, we derive for the CP violating parameters, S{sub??} = 0.02 ± 0.34 ± 0.05 [-0.54, +0.58] and C{sub??} = -0.30 ± 0.25 ± 0.04 [-0.72, +0.12]. First results for B →??−?° and K{sup {+-}}{pi}{sup {-+}}{pi}° final states dominated by the?{sup {+-}} resonance, are also presented.