Determination Of The Wrong Sign Decay Rate D0 K Pi And The Sensitivity To D0 D0bar Mixing

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Determination Of The Wrong Sign Decay Rate D0 K Pi And The Sensitivity To D0 D0bar Mixing

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Author :
language : en
Publisher:
Release Date : 2002

Determination Of The Wrong Sign Decay Rate D0 K Pi And The Sensitivity To D0 D0bar Mixing 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 D[sup 0] meson can decay to the wrong sign K[sup+][pi][sup -] state either through a doubly Cabibbo suppressed decay or via mixing to the[bar D][sup 0] state followed by the Cabibbo favoured decay[bar D][sup 0][yields] K[sup+][pi][sup -]. We measure the rate of wrong sign decays relative to the Cabibbo favoured decay to (0.383[+-] 0.044[+-] 0.022)% and give our sensitivity to a mixing signal.

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))%.

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?

Search For D0d0 Mixing With The Babar Detector Using The Hadronic Decay D0 Yields K Pi And Measurement Of The Doubly Cabibbo Suppressed Decay Rate Of D0 Yields K Pi

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Author : Massimiliano Turri
language : en
Publisher:
Release Date : 2001

Search For D0d0 Mixing With The Babar Detector Using The Hadronic Decay D0 Yields K Pi And Measurement Of The Doubly Cabibbo Suppressed Decay Rate Of D0 Yields K Pi written by Massimiliano Turri and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2001 with Hadrons categories.

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).

A Measurement Of D Mixing In Wrong Sign D K Decays To Provide Input To A Model Independent Determination Of The Ckm Phase

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Author : Samuel T. Harnew
language : en
Publisher:
Release Date : 2015

A Measurement Of D Mixing In Wrong Sign D K Decays To Provide Input To A Model Independent Determination Of The Ckm Phase written by Samuel T. Harnew and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2015 with categories.

Search For Wrong Sign Meson Decays With The Hrs Detector

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Author : S. Abachi
language : en
Publisher:
Release Date : 1986

Search For Wrong Sign Meson Decays With The Hrs Detector written by S. Abachi and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1986 with categories.

Search For D Bar D Mixing And A Measurement Of The Doubly Cabibbo Suppressed Decay Rate In D 2 K Pi Decays

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Author :
language : en
Publisher:
Release Date : 2003

Search For D Bar D Mixing And A Measurement Of The Doubly Cabibbo Suppressed Decay Rate In D 2 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.

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]

Preliminary Study Of D0 K Pi Pi0 Decays With Dalitz Plots

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Author :
language : en
Publisher:
Release Date : 2002

Preliminary Study Of D0 K Pi Pi0 Decays With Dalitz Plots 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.

Particle physicists study the smallest particles and most basic rules of their interactions in humankind's current scope. The Charm Analysis Working Group (CWG) of the BaBar Collaboration studies decays involving the charm quark. They currently study mixing in D decays, an interesting and poorly understood phenomenon in current physics models. We, as part of the CWG, investigated the plausibility of using Dalitz plots and the BaBar analysis framework to study mixing in Wrong Sign (WS) D° 2!K[pi][pi]° decays. Others in the CWG have studied mixing in the 2-body decay, D° 2!K[pi]. The 3-body decay analyzed with the RooFitDalitz analysis package and Dalitz plots provides more information and another way of separating Doubly Cabibbo Suppressed Decays (DCSD) from mixing--which share the same end products. Through doing many simulations, we have demonstrated the usefulness of this approach. We selected D° 2!K[pi][pi]° events from Simulation Production run No. 4 (SP4) and BaBar's run 1 and run 2. We made Dalitz plots with this data. Now that we better understand Dalitz plots and software, we plan to select WS D° 2!K[pi][pi]° events and perform rate fits as discussed in BaBar Analysis Document (BAD) No. 443, as well as fits for several different decay times and resonances, in order to further distinguish DCSD from mixing.