D0 - Anti-D0 Hadronic Mixing and DCS Decays from FOCUS. PDF Download
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Author: Publisher: ISBN: Category : Languages : en Pages : 3
Book Description
The authors present an analysis of the decay D° → K?− from FOCUS. From a sample of 234 events they find a branching ratio of?(D° → K+?−)/?(D° → K−?+) = (0.430{sub -0.061}{sup +0.062} ± 0.031)% under the assumption of no mixing and no CP violation. They also present limits on charm mixing.
Author: Publisher: ISBN: Category : Languages : en Pages : 3
Book Description
The authors present an analysis of the decay D° → K?− from FOCUS. From a sample of 234 events they find a branching ratio of?(D° → K+?−)/?(D° → K−?+) = (0.430{sub -0.061}{sup +0.062} ± 0.031)% under the assumption of no mixing and no CP violation. They also present limits on charm mixing.
Author: K. T. Flood Publisher: ISBN: Category : Languages : en Pages : 3
Book Description
Based on an 87-fb{sup -1} dataset collected by the Babar detector at the PEP-II asymmetric-energy B-Factory, a search for D{sup 0}-{bar D}{sup 0} mixing has been made using the semileptonic decay modes D*{sup +} {yields} {pi}{sup +}D{sup 0}, D{sup 0} {yields} Ke{nu} (+c.c.). The use of these modes allows unambiguous flavor tagging and a combined fit of the D{sup 0} decay time and D*{sup +}-D{sup 0} mass difference ({Delta}M) distributions. The high-statistics sample of unmixed semileptonic D{sup 0} decays is used to model the {Delta}M distribution and time-dependence of mixed events directly from the data. Neural networks are used to select events and reconstruct the D{sup 0}. A result consistent with no charm mixing has been obtained, R{sub mix} = 0.0023 {+-} 0.0012 {+-} 0.0004. This corresponds to an upper limit of R{sub mix}
Author: Publisher: ISBN: Category : Languages : en Pages : 25
Book Description
We point out how, in certain models of New Physics, the same combination of couplings occurs in the amplitudes for both D°-{bar D}° mixing and the rare decays D° --> ll−. If the New Physics dominates and is responsible for the observed mixing, then a very simple correlation exists between the magnitudes of each; in fact the rates for the decay D° --> ll− are completely fixed by the mixing. Observation of D° --> l+l− in excess of the Standard Model prediction could identify New Physics contributions to D°-{bar D}° mixing.
Author: Publisher: ISBN: Category : Languages : en Pages : 4
Book Description
I discuss the results on D°-{bar D}° mixing through hadronic as well as semi-leptonic charm decays, rare flavor-changing neutral currents in the charm sector and the lepton flavor violating [tau] decaying to charged lighter leptons. The results from both BABAR and Belle are presented in this review.
Author: Publisher: ISBN: Category : Languages : en Pages : 12
Book Description
Recently, the B factory experiments BABAR and Belle as well as the CDF collaboration found evidence for mixing in the D meson system. The current status (beginning of summer 2008) of the experimental results of D° mixing is summarized. In this paper, we present an overview of D° mixing. After an introduction to the charm mixing phenomenology and analysis techniques, results of the mixing parameters and CP violation as related to mixing are summarized. They are obtained from hadronic two-body, multi-body final states and from quantum correlated D° decays of the experiments BABAR, Belle, Cleo and CDF. Mixing results from semileptonic D° decays can be found elsewhere.
Author: Publisher: ISBN: Category : Languages : en Pages : 5
Book Description
The BABAR and Belle collaborations have recently found evidence for mixing within the D meson system. We present some of the mixing search techniques used by BABAR and their status as of the beginning of the summer 2007. These have culminated in a measurement in the K[pi] decay final state of the D that is inconsistent with the no-mixing hypothesis with a significance of 3.9 standard deviations.
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Author: Michael G. Hosack
Author: K. T. Flood![Relating D0-anti-D0 Mixing and D0 -] L L- with New Physics PDF](https://books.google.com/books/content/images/frontcover/aFQDngAACAAJ?fife=w80-h100)
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Author: Arun K. Tripathi![STUDY of D exp 0 - D bar exp 0 Mixing and D exp 0 Doubly Cabibbo-Suppressed Decays [Extras] PDF](https://books.google.com/books/content/images/frontcover/LQZ8zwEACAAJ?fife=w80-h100)
Author: R. BARATE
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