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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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]
Scientific And Technical Aerospace Reports
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Author :
language : en
Publisher:
Release Date : 1995
Scientific And Technical Aerospace Reports 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 Aeronautics categories.
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))%.
Government Reports Announcements Index
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Author :
language : en
Publisher:
Release Date : 1995
Government Reports Announcements 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 1995 with Science categories.
Inis Atomindex
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Author :
language : en
Publisher:
Release Date : 1988
Inis Atomindex written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1988 with Nuclear energy categories.
Charm Mixing At Babar
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Author : Ray F. Cowan
language : en
Publisher:
Release Date : 2006
Charm Mixing At Babar written by Ray F. Cowan 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 report on searches for D{sup 0}-{bar D}{sup 0} mixing using decay-time distributions of D{sup 0} {yields} K{pi} and D{sup 0} {yields} K{sup (*)}e{nu} decays and a lifetime ratio analysis of D{sup 0} {yields} K{sup +}K{sup -}, {pi}{sup +}{pi}{sup -} decays using 91 fb{sup -1} of e{sup +}e{sup -} data taken at the PEP-II asymmetric-energy storage ring at energies near 10.6 GeV. Searches for CP-violation in D{sup 0} mixing and decay are also reported, as well as a measurement of R{sub D}, the ratio of the doubly Cabibbo-suppressed decay rate to the Cabibbo-allowed decay rate.
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.
D Sup 0 Anti D Sup 0 Mixing And Doubly Cabibbo Suppressed Decays Of The D Sup
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Author :
language : en
Publisher:
Release Date : 2005
D Sup 0 Anti D Sup 0 Mixing And Doubly Cabibbo Suppressed Decays Of The 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 2005 with categories.
This report summarizes results from Fermilab experiment E791 on D[sup 0]-[anti D][sup 0] mixing and doubly Cabibbo-suppressed decays of the D[sup +] meson. In order to search for D[sup 0]-[anti D][sup 0] mixing, the authors use only D[sup 0] mesons from D[sup *+] decays in which case the charge of the pion from the D[sup *+] decay identifies the charm quantum number of the D[sup 0] at birth. When the D[sup 0] decays, the charge of the kaon identifies the charm quantum number and this way one can tell if mixing has occurred. This kind of search can be carried out by CLEO II as well and their conclusion was that there is some evidence of a wrong sign signal (0.77 [+-] 0.25 [+-] 0.25)% of the right sign signal. However, because of a lack of lifetime information, they cannot distinguish between doubly Cabibbo-suppressed decays which are expected at the level of the observed signal and mixing. They use their excellent lifetime sensitivity to obtain separate limits. During the past year, the authors have been working on extracting D[sup +] doubly Cabibbo-suppressed decay signals from E791's data sample. These decays are interesting both because they have never been observed and because definite predictions have been made about their rates, based on models of D mesons and their decay mechanisms. Preliminary analyses of 1/3 of the data have now been completed. Figure 3 shows the Cabibbo-favored signal D[sup +] [yields] K[sup [minus]][pi][sup +][pi][sup +] and the next figure shows the signal in the doubly Cabibbo-suppressed mode D[sup +] [yields] K[sup +][pi][sup [minus]][pi][sup [minus]].
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.
D Sup 0 Anti D Sup 0 Mixing And Doubly Cabibbo Suppressed Decays Of The Dsup
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Author :
language : en
Publisher:
Release Date : 1994
D Sup 0 Anti D Sup 0 Mixing And Doubly Cabibbo Suppressed Decays Of The Dsup written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1994 with categories.