The Decay B Right Arrow D Superscript O K And Constraints On The Angle G Of The Unitarity Triangle Using The Babar Detector

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The Decay B Right Arrow D Superscript O K And Constraints On The Angle G Of The Unitarity Triangle Using The Babar Detector

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Author :
language : en
Publisher:
Release Date : 2007

The Decay B Right Arrow D Superscript O K And Constraints On The Angle G Of The Unitarity Triangle Using 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 2007 with categories.

The Decay B D0k Bioremediation And Constraints On The Angle Of The Unitary Triangle Using The Babar Detector

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Author : Paul Stephen Jackson
language : en
Publisher:
Release Date : 2007

The Decay B D0k Bioremediation And Constraints On The Angle Of The Unitary Triangle Using The Babar Detector written by Paul Stephen Jackson 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.

Suppressed Charmed B Decay

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language : en
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Release Date : 2009

Suppressed Charmed B Decay 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.

This thesis describes the measurement of the branching fractions of the suppressed charmed B0 → D*- a0+ decays and the non-resonant B0 → D*- [eta][pi]+ decays in approximately 230 million [Upsilon](4S) → B$\bar{B}$ events. The data have been collected with the BABAR detector at the PEP-II B factory at the Stanford Linear Accelerator Center in California. Theoretical predictions of the branching fraction of the B0 → D*- a0+ decays show large QCD model dependent uncertainties. Non-factorizing terms, in the naive factorization model, that can be calculated by QCD factorizing models have a large impact on the branching fraction of these decay modes. The predictions of the branching fractions are of the order of 10-6. The measurement of the branching fraction gives more insight into the theoretical models. In general a better understanding of QCD models will be necessary to conduct weak interaction physics at the next level. The presence of CP violation in electroweak interactions allows the differentiation between matter and antimatter in the laws of physics. In the Standard Model, CP violation is incorporated in the CKM matrix that describes the weak interaction between quarks. Relations amongst the CKM matrix elements are used to present the two relevant parameters as the apex of a triangle (Unitarity Triangle) in a complex plane. The over-constraining of the CKM triangle by experimental measurements is an important test of the Standard Model. At this moment no stringent direct measurements of the CKM angle [gamma], one of the interior angles of the Unitarity Triangle, are available. The measurement of the angle [gamma] can be performed using the decays of neutral B mesons. The B0 → D*- a0+ decay is sensitive to the angle [gamma] and, in comparison to the current decays that are being employed, could significantly enhance the measurement of this angle. However, the low expected branching fraction for the B0 → D*- a0+ decay channels could severely impact the measurement. A prerequisite of the measurement of the CKM angle is the observation of the B0 → D*- a0+ decay on which this thesis reports. The BABAR experiment consists of the BABAR detector and the PEP-II e+e- collider. The design of the experiment has been optimized for the study of CP violation in the decays of neutral B mesons but is also highly suitable for the search for rare B decays such as the B0 → D*- a0+ decay. The PEP-II collider operates at the [Upsilon](4S) resonance and is a clean source of B$\bar{B}$ meson pairs.

Study Of B D Sup D Sup Decays With The Babar Detector

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Author :
language : en
Publisher:
Release Date : 2004

Study Of B D Sup D Sup Decays 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 2004 with categories.

Decays of the type B [yields] D(*)[bar D](*) can be used to provide a measurement of the parameter sin2[beta] of the Unitarity Triangle that is complementary to that derived from the mode B[sup 0] [yields] J/[psi]K[sub S][sup 0]. Here we report a measurement of the branching fraction and a study of the CP parity content for the decay B[sup 0] [yields] D*[sup +]D*[sup -] with the BABAR detector. With data corresponding to an integrated luminosity of 20.7 fb[sup -1] collected at the [Upsilon](4S) resonance during 1999-2000, we determine the branching fraction to be [Beta](B[sup 0] [yields] D*[sup +]D*[sup -]) = (8.0 [+-] 1.6(stat) [+-] 1.2(syst.)) x 10[sup -4]. The measured fraction of the component with odd CP parity is 0.22 [+-] 0.18(stat) [+-] 0.03(syst). Observation of a significant number of candidates in the decay modes B[sup 0] [yields] D*[sup +]D[sup -] and B[sup +] [yields] D*[sup +]D*[sup 0] is reported. All results presented in this note are preliminary.

Study Of B D D Decays With The Babar Detector

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Author :
language : en
Publisher:
Release Date : 2004

Study Of B D D Decays 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 2004 with categories.

Decays of the type B → D(*){bar D}(*) can be used to provide a measurement of the parameter sin2? of the Unitarity Triangle that is complementary to that derived from the mode B° → J/?K{sub S}°. Here we report a measurement of the branching fraction and a study of the CP parity content for the decay B° → D*D*− with the BABAR detector. With data corresponding to an integrated luminosity of 20.7 fb−1 collected at the?(4S) resonance during 1999-2000, we determine the branching fraction to be?(B° → D*+D*−) = (8.0 ± 1.6(stat) ± 1.2(syst.)) x 10−4. The measured fraction of the component with odd CP parity is 0.22 ± 0.18(stat) ± 0.03(syst). Observation of a significant number of candidates in the decay modes B° → D*+D− and B+ → D*+D*° is reported. All results presented in this note are preliminary.

Hadronic B Decays To Open Charm At The Babar Experiment

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Author :
language : en
Publisher:
Release Date : 2002

Hadronic B Decays To Open Charm 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 2002 with categories.

Using about 23M B[bar B] events collected in 1999-2000 with the BABAR detector, they report on the decays B[yields] D(*)[bar D](*)K and B[sup 0][yields] D*[sup+]D*[sup -]. The branching fractions of the low background decay modes B[sup 0][yields] D*[sup -] D(*)[sup 0]K[sup+] are determined to be[Beta](B[sup 0][yields] D*[sup -] D[sup 0]K[sup+])= (2.8[+-] 0.7[+-] 0.5) x 10[sup -3] and[Beta](B[sup 0][yields] D*[sup -]D*[sup 0]K[sup+])= (6.8[+-] 1.7[+-] 1.7) x 10[sup -3], where the first error quoted is statistical and the second systematic. Observation of a significant number of candidates in the color-suppressed decay mode B[sup+][yields] D*[sup+]D*[sup -] K[sup+] is reported with a branching fraction[Beta](B[sup+][yields] D*[sup+]D*[sup -] K[sup+])= (3.4[+-] 1.6[+-] 0.9) x 10[sup -3]. Decays of the type B[yields] D(*)[bar D](*) can be used to provide a measurement of the parameter sin2[beta] of the Unitarity Triangle. For this decay mode they measure a branching fraction of[Beta](B[sup 0][yields] D*[sup+]D*[sup -])= (8.0[+-] 1.6[+-] 1.2) x 10[sup -4].

Measurement Of The Branching Fraction For The Decay B Sup 0 D Sup D Sup

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Author :
language : en
Publisher:
Release Date : 2001

Measurement Of The Branching Fraction For The Decay B Sup 0 D Sup D Sup written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2001 with categories.

Decays of the type B[yields] D[sup (*)][bar D](*) can be used to provide a measurement of the parameter sin2[beta] of the Unitarity Triangle that is complementary to the measurement derived from the mode B[sup 0][yields]/K[sub S][sup 0]. In this document we report a measurement of the branching fraction for the decay B[sup 0][yields] D*[sup+]D*[sup -] with the BABAR detector. With data corresponding to an integrated luminosity of 20.7 fb[sup -1] collected at the[Upsilon](4S) resonance during 1999-2000, we have reconstructed 38 candidate signal events in the mode B[sup 0][yields] D*[sup+]D*[sup -] with an estimated background of 6.2[+-] 0.5 events. From these events, we determine the branching fraction to be[Beta](B[sup 0][yields] D*[sup+]D*[sup -])= (8.0[+-] 1.6(stat)[+-] 1.2(syst)) x 10[sup -4] (preliminary). The measured fraction of the component with odd CP parity is 0.27[+-] 0.17(stat)[+-] 0.02(syst).

Investigation Of The Charmless Decay B Superscript Pm Right Pointing Horizontal Arrow K Superscript Pm Pi Superscript Pm Pi Superscript Mp Using A Dalitz Plot Analysis At Babar

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Author :
language : en
Publisher:
Release Date : 2005

Investigation Of The Charmless Decay B Superscript Pm Right Pointing Horizontal Arrow K Superscript Pm Pi Superscript Pm Pi Superscript Mp Using A Dalitz Plot Analysis 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 2005 with categories.

A Study Of B To C And B To U Interference In The Decay B To K Pi D K

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

A Study Of B To C And B To U Interference In The Decay B To K Pi D K 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.

Using a sample of 232 x 10{sup 6} {Upsilon}(4S) {yields} B{bar B} events collected with the BABAR detector at the PEP-II B-factory we study the decay B{sup -} {yields} [K{sup +}{pi}{sup -}]{sub D}K*{sup -} where the K{sup +}{pi}{sup -} is either from a Cabibbo-favored {bar D}{sup 0} decay or doubly-suppressed D{sup 0} decay. We measure two observables that are sensitive to the CKM angle {gamma}; the ratio R of the charge-averaged branching fractions for the suppressed and favored decays; and the charge asymmetry A of the suppressed decays: R = 0.046 {+-} 0.031(stat.) {+-} 0.008(syst.); A = -0.22 {+-} 0.61(stat.) {+-} 0.17(syst.).

Study Of The Decay B0 Anti B0 Rho Rho And Constraints On The Ckm Angle Alpha

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Author :
language : en
Publisher:
Release Date : 2004

Study Of The Decay B0 Anti B0 Rho Rho And Constraints On The Ckm Angle Alpha 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.

Using a data sample of 89 million [Upsilon](4S) [yields] B[bar B] decays collected with the BABAR detector at the PEP-II asymmetric B Factory at SLAC, the authors measure the B[sup 0]([bar B][sup 0]) [yields] [rho][sup +][rho][sup -] branching fraction as (30 [+-] 4(stat) [+-] 5(syst)) x 10[sup -6] and a longitudinal polarization fraction of f[sub L] = 0.99 [+-] 0.03(stat)[sub -0.03][sup +0.04](syst). They measure the time-dependent-asymmetry parameters of the longitudinally polarized component of this decay as C[sub L] = -0.17 [+-] 0.27(stat) [+-] 0.14(syst) and S[sub L] = -0.42(stat) [+-] 0.14(syst). They present constraints on the CKM angle [alpha].