Measurement Of D0 Bar D 0 Mixing With A Time Dependent Amplitude Analysis Of D0 U2192 K 0

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Measurement Of D0 Bar D 0 Mixing With A Time Dependent Amplitude Analysis Of D0 U2192 K 0

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Author :
language : en
Publisher:
Release Date : 2013

Measurement Of D0 Bar D 0 Mixing With A Time Dependent Amplitude Analysis Of D0 U2192 K 0 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.

Flavor mixing of neutral mesons is a long and well known phenomenon in particle physics. Experimental evidence of mixing of the neutral kaon was obtained in 1956, followed in 1987 by the evidence of Bd mixing. In 1974, A. Pais and S. B. Treiman firstly introduced the idea of charm mixing and CP violation. Even though many searches were conducted over time, it was clear that the small scale at which both amplitude and frequency of the oscillation took place made any possible observation challenging. In 2007, both the BABAR and Belle experiments announced the first evidence of mixing in the charm sector. The analyses concerned the study of a two body decay of the D0 meson. Few months later, BABAR presented the analysis of the decay D0 → K+?-?0 . This is the main topic of this thesis.

Measurement Of D0 Bar D 0 Mixing With A Time Dependent Amplitude Analysis Of D0 2 K Pi Pi 0

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Author :
language : en
Publisher:
Release Date : 2013

Measurement Of D0 Bar D 0 Mixing With A Time Dependent Amplitude Analysis Of D0 2 K Pi Pi 0 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.

Flavor mixing of neutral mesons is a long and well known phenomenon in particle physics. Experimental evidence of mixing of the neutral kaon was obtained in 1956, followed in 1987 by the evidence of Bd mixing. In 1974, A. Pais and S.B. Treiman firstly introduced the idea of charm mixing and CP violation. Even though many searches were conducted over time, it was clear that the small scale at which both amplitude and frequency of the oscillation took place made any possible observation challenging. In 2007, both the BABAR and Belle experiments announced the first evidence of mixing in the charm sector. The analyses concerned the study of a two body decay of the D0 meson. Few months later, BABAR presented the analysis of the decay D0 2!K+[pi]-[pi]0 . This is the main topic of this thesis.

Measurement Of D 0 Bar D 0 Mixing From A Time Dependent Amplitude Analysis Of D 0 K Pi Pi0 Decays

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Author :
language : en
Publisher:
Release Date : 2008

Measurement Of D 0 Bar D 0 Mixing From A Time Dependent Amplitude Analysis Of D 0 K Pi Pi0 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.

Study Of D0 D 0 Mixing Parameters Using A Time Dependent Amplitude Analysis Of The Decay D0 K0s Pi Pi

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Author : Rolf Andreassen
language : en
Publisher:
Release Date : 2010

Study Of D0 D 0 Mixing Parameters Using A Time Dependent Amplitude Analysis Of The Decay D0 K0s Pi Pi written by Rolf Andreassen 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.

I present a measurement of the mixing parameters in the D meson system, using 473.5 inverse fb of data from the BaBar detector. A time-dependent fit to the Dalitz plot of the decay D^0 -> K_S pi+ pi-, assuming no CP violation, finds for the DDbar mixing parameters, the normalised mass and width differences x and y, x = (0.43 ± 0.25 ± 0.20)% y = (0.70 ± 0.22 ± 0.17)% where the uncertainties are statistical and systematic. For D and Dbar samples separately, we find x(D) = (0.49 ± 0.36 ± 0.20)% y(D) = (0.82 ± 0.31 ± 0.17)% x(Dbar) = (0.46 ± 0.35 ± 0.20)% y(Dbar) = (0.55 ± 0.31 ± 0.17)%.

Measurement Of D0 D0bar Mixing Using The Ratio Of D0 K Pi And K K Lifetimes

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Author :
language : en
Publisher:
Release Date : 2009

Measurement Of D0 D0bar Mixing Using The Ratio Of D0 K Pi And K K Lifetimes 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.

We measure the rate of D°-{bar D}° mixing with the observable y{sub CP} = (?{sub K?}/?{sub KK}) - 1, where?{sub KK} and?{sub K?} are respectively the mean lifetimes of CP-even D° → KK− and CP-mixed D° → K−?+ decays, using a data sample of 384 fb−1 collected by the BABAR detector at the SLAC PEP-II asymmetric-energy B Factory. From a sample of D° and {bar D}° decays where the initial flavor of the decaying meson is not determined, we obtain y{sub CP} = [1.12 ± 0.26(stat) ± 0.22(syst)]%, which excludes the no-mixing hypothesis at 3.3?, including both statistical and systematic uncertainties. This result is in good agreement with a previous BABAR measurement of y{sub CP} obtained from a sample of D*+ → D°?+ events, where the D° decays to K−?+, K+K−, and {pi}+{pi}−, which is disjoint with the untagged D° events used here. Combining the two results taking into account statistical and systematic uncertainties, where the systematic uncertainties are assumed to be 100% correlated, we find y{sub CP} = [1.16 ± 0.22(stat) ± 0.18(syst)]%, which excludes the no-mixing hypothesis at 4.1?

Measurement Of B0 Minus Bar Bsup 0 Mixing Using Dimuons At

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Author :
language : en
Publisher:
Release Date : 1995

Measurement Of B0 Minus Bar Bsup 0 Mixing Using Dimuons At written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1995 with categories.

D0 Anti D0 Mixing Results From Babar By Analysis Of D0 K Pi Pi0 Dalitz Plot Regions

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Author : M. G. Wilson
language : en
Publisher:
Release Date : 2006

D0 Anti D0 Mixing Results From Babar By Analysis Of D0 K Pi Pi0 Dalitz Plot Regions written by M. G. Wilson 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.

We present a preliminary search for D{sup 0}-{bar D}{sup 0} mixing using the decays D{sup 0} {yields} K{sup +}{pi}{sup -}{pi}{sup 0}, additionally presenting Dalitz-plot distributions and a measurement of the branching ratio for this mode. A new tagging technique is used to produce the doubly Cabibbo-suppressed Dalitz plot, which in turn is used to motivate the method used for the D-mixing search. We analyze 230.4 fb{sup -1} of data collected from the BABAR detector at the PEP-II collider. Assuming CP conservation, we find R{sub M}

D0 D Bar 0 Mixing And Rare Charm Decays

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Author :
language : en
Publisher:
Release Date : 2003

D0 D Bar 0 Mixing And Rare Charm 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 2003 with categories.

We review the current status of flavor-changing neutral currents in the charm sector. We focus on the standard-model predictions and identify the main sources of theoretical uncertainties in both D° - {bar D}° mixing and rare charm decays. The potential of these observables for constraining short-distance physics in the standard model and its extensions is compromised by the presence of large nonperturbative effects. We examine the possible discovery windows in which short-distance physics can be tested and study the effects of various extensions of the standard model. The current experimental situation and future prospects are reviewed.

Measurement Of Cp Violation In B0d Mixing Using B0d U2192 D X Decays

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Author :
language : en
Publisher:
Release Date : 2012

Measurement Of Cp Violation In B0d Mixing Using B0d U2192 D X 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 2012 with categories.

This thesis describes the measurement of the time-integrated semileptonic charge asymmetry in B0d mixing, ad sl, using the decay chain of B0d ! D*-?+(??), D*- ! D0?-, D0 ! K+?-. Decay candidates are reconstructed from 10.4 fb-1 of data recorded by the DØ detector at Fermilab’s Tevatron p$ar{p}$ collder during the 2002- 2011 ‘RunII’ data taking period. Yields are extracted using a 2 minimising simultaneous binned fit where 490k D candidates are reconstructed. The measurements presented in this thesis was made possible due to sophisticated online and offline reconstruction software, precise tracking systems, and the first-order background asymmetry negating magnet polarity reversal of the DØ detector.

Search For D0 Anti D0 Mixing With The Babar Experiment

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Author :
language : en
Publisher:
Release Date : 2007

Search For D0 Anti D0 Mixing 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 2007 with categories.

The results of searches for D°-{bar D}° mixing in the decays D° → K?−?° and D° → K+?−?+?−, using 230 fb−1 of e+e− collisions collected from the BABAR detector at the PEP-II storage ring at SLAC, are presented. The combination of results from these analyses yields a value for the time-integrated mixing rate R{sub M} = (0.020{sub -0.010}{sup +0.011}(stat.))%, and an upper limit R{sub M}