Download or read book Search for D0 Anti D0 Mixing Using Semileptonic Decays written by K. T. Flood and published by . This book was released on 2005 with total page 3 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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}

Download or read book Search for D0 D0 Mixing Using Semileptonic Decays written by Arun K. Tripathi and published by . This book was released on 1997 with total page 228 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book A Search for D0 D 0 Mixing in Semileptonic Decays from Focus written by Michael G. Hosack and published by . This book was released on 2002 with total page 394 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Search for Neutral D Meson Mixing Using Semileptonic Decays written by Kevin T. Flood and published by . This book was released on 2006 with total page 178 pages. Available in PDF, EPUB and Kindle. Book excerpt: Based on a 87 fb{sup -1} dataset, a search for D{sup 0}-{bar D}{sup 0} mixing is made using the semileptonic decay modes D*{sup +} {yields} {pi}{sup +} D{sup 0}, D{sup 0} {yields} [K/K*]e{nu} (+c.c.) at the B-Factory facility at the Stanford Linear Accelerator Center. These modes offer unambiguous initial and final-state charm flavor tags, and allow the combined use of the D{sup 0} lifetime and D*{sup +}-D{sup 0} mass difference ({Delta}M) in a global likelihood fit. The high-statistics sample of reconstructed unmixed semileptonic D{sup 0} decays is used to model both the {Delta}M distribution and the time-dependence of mixed events directly from the data. Neural networks are used both to select events and to fully reconstruct the D{sup 0}. A result consistent with no charm mixing has been obtained, R{sub mix}

Download or read book Search for D0 D0bar Mixing and Rare Charm Decays written by U. Egede and published by . This book was released on 2004 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Based on a dataset acquired by the BABAR experiment running on and near the {Upsilon}(4S) resonance from 1999-2002, an upper limit is set on the rate of D{sup 0}-{bar D}{sup 0} mixing using the decay mode D*{sup +} {yields} D{sup 0}{pi}{sup +}, followed by a semi-leptonic decay of the D{sup 0}. Results are compared to previous BABAR analysis using hadronic decays. We also set limits on the flavor-changing neutral current decays D{sup 0} {yields} e{sup +}e{sup -} ({mu}{sup +}{mu}{sup -}) and the lepton-flavor violation decays D{sup 0} {yields} e{sup {+-}}{mu}{sup {-+}}.

Download or read book Search for D sup 0 bar D sup 0 Mixing Using Semileptonic Decay Modes written by and published by . This book was released on 2004 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: 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 +] --> [pi][sup +] D[sup 0][sub z] D[sup 0] --> K*[epsilon][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]

Download or read book Search for D bar D Mixing Using Semileptonic Decay Modes written by and published by . This book was released on 2004 with total page 5 pages. Available in PDF, EPUB and Kindle. Book excerpt: Based on an 87-fb−1 dataset collected by the BABAR detector at the PEP-II asymmetric-energy B-Factory, a search for D°-{bar D}° mixing has been made using the semileptonic decay modes D* -->?+ D°{sub z} D° --> K*?? (+c.c.). The use of these modes allows unambiguous flavor tagging and a combined fit of the D° decay time and D*+-D° mass difference (?M) distributions. The high-statistics sample of unmixed semileptonic D° decays is used to model the?M distribution and time-dependence of mixed events directly from the data. Neural networks are used to select events and reconstruct the D°. 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}

Download or read book Search for D0 anti D0 Mixing in the Decays D0 K Pi Pi Pi written by B. Aubert and published by . This book was released on 2006 with total page 15 pages. Available in PDF, EPUB and Kindle. Book excerpt: We present a search for D{sup 0}-{bar D}{sup 0} mixing in the decays D{sup 0} {yields} K{sup +}{pi}{sup -}{pi}{sup +}{pi}{sup -} using 230.4 fb{sup -1} of data collected with the BABAR detector at the PEP-II e{sup +}e{sup -} collider at SLAC. Assuming CP conservation, we measure the time-integrated mixing rate R{sub M} = (0.019{sub -0.015}{sup +0.016}(stat.) {+-} 0.002(syst.))%, and R{sub M}

Download or read book D0 Anti D0 Hadronic Mixing and DCS Decays from FOCUS written by and published by . This book was released on 2005 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: We present an analysis of the decay D[sup 0] [yields] K[sup +][pi][sup -] from FOCUS. From a sample of 234 events we find a branching ratio of [Lambda](D[sup 0] [yields] K[sup +][pi][sup -])/[Lambda](D[sup 0] [yields] K[sup -][pi][sup +]) = (0.430[sub -0.061][sup +0.062] [+-] 0.031)% under the assumption of no mixing and no CP violation. We also present limits on charm mixing.

Download or read book Search for D0 D 0 Mixing in D0 K pi pi pi Decays written by Yi Zheng (Ph. D.) and published by . This book was released on 2008 with total page 196 pages. Available in PDF, EPUB and Kindle. Book excerpt: We present results of a search for D0-D̄0 mixing by analyzing D0 --> K [pi]− [pi]− [pi]+ decays from events in 230.4 fb-1 e+e- data recorded by BABAR. Assuming CP conservation, we measure the time-integrated mixing rate RM = (0.0019 ... (stat.) ± 0.002 (syst.))%, and RM

Download or read book Searches for D0 Anti D0 Mixing Rare Charm And Tau Decays written by and published by . This book was released on 2007 with total page 4 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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.

Download or read book Measurement of D0 bar D 0 Mixing With a Time Dependent Amplitude Analysis of D0 2 K pi pi 0 written by and published by . This book was released on 2013 with total page 216 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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.

Download or read book Analysis of D 0 bar D 0 Mixing in D 0 K pi Decays Using the CDF II Detector written by and published by . This book was released on 2009 with total page 103 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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).

Download or read book Measurement of D0 bar D 0 Mixing With a Time Dependent Amplitude Analysis of D0 u2192 K 0 written by and published by . This book was released on 2013 with total page 216 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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.

Download or read book Search for D0 anti D0 Mixing with the BaBar Experiment written by and published by . This book was released on 2007 with total page 4 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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}

Download or read book Limits on D0 Anti D0 Mixing and CP Violation from the Ratio of Lifetimes for Decay to K Pi K K and Pi Pi written by and published by . This book was released on 2003 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: We present a measurement of D[sup 0]-[bar D][sup 0] mixing parameters using the ratios of lifetimes extracted from samples of D[sup 0] mesons decaying to K[sup -][pi][sup+], K[sup -]K[sup+], and[pi][sup -][pi][sup+]. Using 91 fb[sup -1] of data collected by the BABAR detector at the PEP-II asymmetric-energy B Factory, we obtain a value Y= (0.8[+-] 0.4(stat.)[sub -0.4][sup+0.5](syst.))%, which, in the limit of CP conservation, corresponds to the mixing parameter y=[Delta][Lambda]/2[Lambda]. Using the difference in lifetimes of D[sup 0] and[bar D][sup 0] mesons, we obtain the CP-violation parameter[Delta][Lambda]= ( -0.8[+-] 0.6(stat.)[+-] 0.2(syst.))%.

Download or read book Particle Physics Reference Library written by Herwig Schopper and published by Springer Nature. This book was released on 2020 with total page 632 pages. Available in PDF, EPUB and Kindle. Book excerpt: This first open access volume of the handbook series contains articles on the standard model of particle physics, both from the theoretical and experimental perspective. It also covers related topics, such as heavy-ion physics, neutrino physics and searches for new physics beyond the standard model. A joint CERN-Springer initiative, the "Particle Physics Reference Library" provides revised and updated contributions based on previously published material in the well-known Landolt-Boernstein series on particle physics, accelerators and detectors (volumes 21A, B1,B2,C), which took stock of the field approximately one decade ago. Central to this new initiative is publication under full open access