Measurement Of Partial Widths And Search For Direct Cp Violation In D0 Meson Decays To K K And Pi Pi

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Measurement Of Partial Widths And Search For Direct Cp Violation In D0 Meson Decays To K K And Pi Pi

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Author :
language : en
Publisher:
Release Date : 2004

Measurement Of Partial Widths And Search For Direct Cp Violation In D0 Meson Decays To K K And Pi Pi 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 authors present a measurement of relative partial widths and decay rate CP asymmetries in K−K and?−?+ decays of D° mesons produced in p{bar p} collisions at √s = 1.96 TeV. They use a sample of 2 x 105 D*+ → D°?+ (and charge conjugate) decays with the D° decaying to K−?+, K−K+, and?−?+, corresponding to 123 pb−1 of data collected by the CDF II experiment at the Fermilab Tevatron collider. No significant direct CP violation is observed, they measure?(D° → K−K+)/?(D° → K−?+) = 0.0992 ± 0.0011 ± 0.0012,?(D° →?−?+)/?(D° → K−?+) = 0.03594 ± 0.00054 ± 0.00040,?(D° → K−K+)/?(D° →?−?+) = 2.760 ± 0.040 ± 0.034, A{sub CP} (K−K+) = (2.0 ± 1.2 ± 0.6)%, and A{sub CP}(?−?+) = (1.0 ± 1.3 ± 0.6)%, where, in all cases, the first uncertainty is statistical and the second is systematic.

High Energy Physics Index

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Author :
language : en
Publisher:
Release Date : 1989

High Energy Physics Index written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1989 with Particles (Nuclear physics) categories.

Inis Atomindeks

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Author :
language : en
Publisher:
Release Date : 1986

Inis Atomindeks written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1986 with Nuclear energy categories.

Dissertation Abstracts International

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language : en
Publisher:
Release Date : 1986

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 1986 with Dissertations, Academic categories.

Measurement Of Mixing And Cp Violation In The Two Body D0 Decays To Kk Pipi And Kpi With The Babar Experiment

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Author :
language : en
Publisher:
Release Date : 2012

Measurement Of Mixing And Cp Violation In The Two Body D0 Decays To Kk Pipi And Kpi With 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 2012 with categories.

In this thesis we present the measurement of D0 - $\bar{D}$0 mixing parameter yCP using the full BABAR data sample. We also searched for CP violation in the D0 → K+K-, [pi]+[pi]- channels, finding the parameter [Delta]Y compatible with zero. In Chapter 1, we briefly review the SM and introduce the theoretical framework of neutral meson mixing and CP violation. The BABAR detector and the performance of each sub-detector are described in Chapter 2. In Chapter 3, we present an overview of the analysis including a brief description of the previous similar BABAR analyses and the expected improvements in the present analysis. The candidate reconstruction and selection are described in Chapter 4, together with the optimization of the signal region. The signal and background event classes are described in Chapter 5, where we also provide the probability density functions used to extract the mixing and CP violating parameter. In Chapter 6 we describe the various crosschecks performed to validate the analysis and the evaluation of the systematic error. Finally in Chapter 7 we present the final results and their interpretation.

Observation Of Direct Cp Violation In B Sup 0 K Sup Pi Sup Decays

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Author :
language : en
Publisher:
Release Date : 2004

Observation Of Direct Cp Violation In B Sup 0 K Sup Pi Sup 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.

The authors present an updated search for direct CP violation in the decay B[sup 0] --> K[sup +]pi[sup -]. Using 227 million [Upsilon](4S) --> B[bar B] decays collected with the BaBar detector at the PEP-II asymmetric-energy E[sup +]e[sup -] collider at SLAC, the authors observe a total signal yield of n(K-pi[sup +]) + n(K[sup +]pi[sup -]) = 1606 [+-] 51 decays and measure the asymmetry [n(K[sup -]pi[sup +])-n(K[sup +]pi[sup -])]/[n(K[sup -]pi[sup +])+n(K[sup +]pi[sup -])] = 0.133 [+-] 0.030(stat) [+-] 0.009(syst). This measurement establishes direct CP violation in the B[sup 0] meson system at the level of 4.2 standard deviations.

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.

Search For Cp Violation In The Decays D0 To K K And D0 To Pi Pi

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Author :
language : en
Publisher:
Release Date : 2007

Search For Cp Violation In The Decays D0 To K K And D0 To Pi Pi 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.

We measure CP-violating asymmetries of neutral charmed mesons in the modes D° → K−K and D° →?−?+ with the highest precision to date by using D° → K−?+ decays to correct detector asymmetries. An analysis of 385.8 fb−1 of data collected with the BaBar detector yields values of a{sup KK}{sub CP} = (0.00 ± 0.34 (stat.) ± 0.13 (syst.))% and a{sup?{pi}}{sub CP} = ( -0.24 ± 0.52 (stat.) ± 0.22 (syst.))%, which agree with Standard Model predictions.

A Search For Direct Cp Violation In Two Body Cabibbo Suppressed Decays Of Neutral Charmed Mesons

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Author :
language : en
Publisher:
Release Date : 2007

A Search For Direct Cp Violation In Two Body Cabibbo Suppressed Decays Of Neutral Charmed Mesons 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.

Presented are the results of a search for direct CP violation in Cabibbo-suppressed decays of D° to two charged daughters. The analysis described was performed on ≈230 fb−1 of the BABAR data sample, recorded at the Stanford Linear Accelerator Center and using the PEP-II electron storage rings. We measure CP asymmetries for decay to the KK and [pi][pi] final states, as well as for the branching ratio, and develop a new technique for tagging-efficiency correction using the Cabibbo-favored K[pi] final state. We find some evidence for CP violation in decays to the KK final state and results that suggest CP violation in the [pi][pi] final state as well.

Deutsche Grundkarte

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Author :
language : en
Publisher:
Release Date : 1989

Deutsche Grundkarte written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1989 with categories.