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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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.

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.

High Energy Physics Index

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Author :
language : en
Publisher:
Release Date : 1987

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 1987 with Nuclear physics categories.

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.

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)%.

Analysis Of D0 K Pi Pi0 Decays

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Author : Michael Galante Wilson
language : en
Publisher:
Release Date : 2005

Analysis Of D0 K Pi Pi0 Decays written by Michael Galante Wilson 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.

Analyzing D{sup 0} {yields} K{sup +}{pi}{sup -}{pi}{sup 0} decays, herein are presented the methods and results of a search for D{sup 0}-{bar D}{sup 0} mixing, a measurement of the branching ratio R {equivalent_to} {Lambda}(D{sup 0} {yields} K{sup +}{pi}{sup -}{pi}{sup 0})/{Lambda}(D{sup 0} {yields} K{sup -}{pi}{sup +}{pi}{sup 0}), and measurements of the contributions from D{sup 0} {yields} K{sup +}{rho}{sup -}, K*{sup +}{pi}{sup -}, K*{sup 0}{pi}{sup 0}; 230.4 fb{sup -1} of data collected from the BABAR detector at the PEP-II collider during 2000-2004 (Runs 1-4) are analyzed. An event-level tagging technique is developed, which facilitates the accurate determination of doubly Cabibbo-suppressed resonance contributions by suppressing background from Cabibbo-favored decays. The branching ratio is measured as R = (0.214 {+-} 0.008 (stat) {+-} 0.008 (syst))%, with (46.1 {+-} 3.3 (stat) {+-} 2.9 (syst))% of D{sup 0} {yields} K{sup +}{pi}{sup -}{pi}{sup 0} decays proceeding through the channel D{sup 0} {yields} K*{sup +}{pi}{sup -}. The data are consistent with the null-D-mixing hypothesis at a confidence level of 10%, and the expected value of {+-} {radical}(x{sup 2} + y{sup 2}) is measured as -0.013 {+-} 0.010 (stat), indicating negative interference between mixing and doubly Cabibbo-suppressed decay. The expected value of the integrated mixing rate is (x{sup 2} + y{sup 2})/2 = (0.013 {+-} 0.013 (stat))%.

Analysis Of D 0 Bar D 0 Mixing In D 0 K Pi Decays Using The Cdf Ii Detector

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Author :
language : en
Publisher:
Release Date : 2009

Analysis Of D 0 Bar D 0 Mixing In D 0 K Pi Decays Using The Cdf Ii 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 2009 with categories.

We presented the first observation of D0-$\bar{D}$0 mixing in a single analysis. We measured the ratio of doubly Cabibbo suppressed or WS (D0 → K+[pi]-) decay rate to Cabibbo favored or RS (D0 → K-[pi]+) decay rate as a function of D0 decay time. We used an integrated luminosity of 4.0 fb-1 of proton anti-proton collisions at √s = 1.96 TeV at the collider detector at Fermilab (CDF II).

Amplitude Analysis Of The Decay D0 To K K Pi0

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Author :
language : en
Publisher:
Release Date : 2007

Amplitude Analysis Of The Decay D0 To K K Pi0 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.

Using 385 fb−1 of ee− collisions, they study the amplitudes of the singly Cabibbo-suppressed decay D° → K−K+?°. They measure the strong phase difference between the {bar D}° and D° decays to K*(892)+K− to be -35.5{sup o} ± 1.9{sup o}(stat) ± 2.2{sup o}(syst), and their amplitude ratio to be 0.599 ± 0.013(stat) ± 0.011(syst). They observe contributions from the K? and K−K+ scalar and vector amplitudes, and analyze their angular moments. They find no evidence for charged?, nor for higher spin states. They also perform a partial wave analysis of the K−K+ system in a limited mass range.

Search For D Sup 0 Bar D Sup 0 Mixing And A Measurement Of The Doubly Cabibbo Suppressed Decay Rate In D Sup 0 Yields K Pi Decays

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Author :
language : en
Publisher:
Release Date : 2003

Search For D Sup 0 Bar D Sup 0 Mixing And A Measurement Of The Doubly Cabibbo Suppressed Decay Rate In D Sup 0 Yields K Pi 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 present results of a search for D[sup 0]-[bar D][sup 0] mixing and a measurement of R[sub D], the ratio of doubly Cabibbo-suppressed decays to Cabibbo-favored decays, based on an analysis of D[sup 0][yields] K[sup+][pi][sup -] decays in 57.1 fb[sup -1] of data collected at or just below the[Upsilon](4S) resonance with the BABAR detector at the PEP-II collider. Our results are compatible with no mixing and no CP violation. At the 95% confidence level, allowing for CP violation, we find the mixing parameters x[prime][sup 2]

Measurement Of The Ratio Of Decay Amplitudes For B0bar J Psi K 0 And B0 J Psi K 0

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Author :
language : en
Publisher:
Release Date : 2004

Measurement Of The Ratio Of Decay Amplitudes For B0bar J Psi K 0 And B0 J Psi 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 2004 with categories.

We have measured the time-dependent decay rate for the process B [yields] J/[psi] K*[sup 0](892) in a sample of about 88 million [Upsilon](4S) [yields] B[bar B] decays collected with the BABAR detector at the PEP-II asymmetric-energy B Factory at SLAC. In this sample we study flavor-tagged events in which one neutral B meson is reconstructed in the J/[psi]K*[sup 0] or J/[psi] [bar K]*[sup 0] final state. We measure the coefficients of the cosine and sine terms in the time-dependent asymmetries for J/[psi]K*[sup 0] and J/[psi][bar K]*[sup 0], find them to be consistent with the Standard Model expectations, and set upper limits at 90% C.L. on the decay amplitude ratios A([bar B][sup 0] [yields] J/[psi]K*[sup 0])/A(B[sup 0] [yields] J/[psi]K*[sup 0])