Download or read book Charmed Baryon Spectroscopy and Search for CP Violation in D0 2 Ks Pi Pi at CDF written by Felix Wick and published by . This book was released on 2011 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Charmed Baryon Spectroscopy and Search for CP Violation in D 0 to K S 0 pi pi at CDF written by and published by . This book was released on 2011 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: In this thesis two different analyses are presented, namely the measurements of the properties of $\Lambda_c(2595)^+$, $\Lambda_c(2625)^+$, $\Sigma_c(2455)^{++,0}$, and $\Sigma_c(2520)^{++,0}$ baryons as well as the search for $CP$ violation in the Dalitz plot of the decay $D^0 \to K_S^0\, \pi^+\, \pi^-$. Both studies are performed using data corresponding to 5.2\, \invfb respective 6.0\, \invfb of integrated luminosity from $p\bar{p}$ collisions at a center-of-mass energy of 1.96\, TeV, collected with the CDF~II detector at the Fermilab Tevatron. The masses and decay widths of the mentioned charmed baryon resonances are measured with uncertainties comparable to the world averages for $\Sigma_c$ states, and significantly smaller uncertainties than the world averages for excited $\Lambda_c^+$ states. No hints for any $CP$ violating effects in the resonant substructure of $D^0 \to K_S^0\, \pi^+\, \pi^-$ are found.

Download or read book Charmed Baryon Spectroscopy and Search for CP Violation in D0 to K S0 pi pi at CDF written by and published by . This book was released on 2011 with total page 235 pages. Available in PDF, EPUB and Kindle. Book excerpt: In this thesis two different analyses are presented, namely the measurements of the properties of $\Lambda_c(2595)+̂$, $\Lambda_c(2625)+̂$, $\Sigma_c(2455){̂++,0}$, and $\Sigma_c(2520){̂++,0}$ baryons as well as the search for $CP$ violation in the Dalitz plot of the decay $D0̂ \to K_S0̂\,\pi+̂\,\pi-̂$. Both studies are performed using data corresponding to 5.2\,\invfb respective 6.0\,\invfb of integrated luminosity from $p\bar{p}$ collisions at a center-of-mass energy of 1.96\,TeV, collected with the CDFĨI detector at the Fermilab Tevatron. The masses and decay widths of the mentioned charmed baryon resonances are measured with uncertainties comparable to the world averages for $\Sigma_c$ states, and significantly smaller uncertainties than the world averages for excited $\Lambda_c+̂$ states. No hints for any $CP$ violating effects in the resonant substructure of $D0̂ \to K_S0̂\,\pi+̂\,\pi-̂$ are found.

Download or read book Search for CP Violation in the Decays D0 to K K and D0 to Pi Pi written by and published by . This book was released on 2007 with total page 7 pages. Available in PDF, EPUB and Kindle. Book excerpt: We measure CP-violating asymmetries of neutral charmed mesons in the modes D° → K−K and D° →?−?+ with the highest precision to date by using D° → K−?+ decays to correct detector asymmetries. An analysis of 385.8 fb−1 of data collected with the BaBar detector yields values of a{sup KK}{sub CP} = (0.00 ± 0.34 (stat.) ± 0.13 (syst.))% and a{sup?{pi}}{sub CP} = ( -0.24 ± 0.52 (stat.) ± 0.22 (syst.))%, which agree with Standard Model predictions.

Download or read book CP Violation in the D0 Pi Pi Decay at CDF written by and published by . This book was released on 2010 with total page 5 pages. Available in PDF, EPUB and Kindle. Book excerpt: We report a measurement of the CP violating asymmetry in D° →??− decays using approximately 215,000 decays reconstructed in about 5.94 fb−1 of CDF data. We use the strong D*+ → D°?+ decay ('D* tag') to identify the flavor of the charmed meson at production time and exploit CP-conserving strong c{bar c} pair-production in p{bar p} collisions. Higher statistic samples of Cabibbo-favored D° → K−?+ decays with and without D* tag are used to highly suppress systematic uncertainties due to detector effects. The result, A{sub CP}(D° →?+?−) = [0.22 ± 0.24 (stat.) ± 0.11 (syst.)]%, is the world's most precise measurement to date and it is fully consistent with no CP violation.

Download or read book Measurement of Indirect CP violating Asymmetries in D02 K and D02 pi pi Decays at CDF written by and published by . This book was released on 2014 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1995 with total page 704 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Polarization and CP Violation Measurements written by Michael Prim and published by Springer Science & Business Media. This book was released on 2014-03-28 with total page 111 pages. Available in PDF, EPUB and Kindle. Book excerpt: This thesis describes the thorough analysis of the rare B meson decay into φ K* on data taken by the Belle Collaboration at the B-meson-factory KEKB over 10 years. This reaction is very interesting, because it in principle allows the observation of CP-violation effects. In the Standard Model however, no CP violation in this reaction is expected. An observation of CP asymmetries thus immediately implies new physics. This thesis presents an amplitude analysis of this decay and the search for CP violation in detail and discusses methods to solve related problems: The quantification of multivariate dependence and the improvement of numeric evaluation speed of normalization integrals in amplitude analysis. In addition it provides an overview of the theory, experimental setup, (blind) statistical data analysis and estimation of systematic uncertainties.

Download or read book Search for CP Violation in Singly Cabibbo Suppressed Four body D Decays written by and published by . This book was released on 2011 with total page 125 pages. Available in PDF, EPUB and Kindle. Book excerpt: We search for CP violation in a sample of 4.7 x 104 singly Cabibbo suppressed D0 2!K+ K- [pi]+[pi]- decays and 1.8(2.6) x 104 D(s)+ 2!KS0 K+ [pi]+ [pi]- decays. CP violation is searched for in the difference between the T-odd asymmetries, obtained using triple product correlations, measured for D and D decays. The measured CP violation parameters are AT(D0) = (1.0 ± 5.1(stat) ± 4.4(syst)) x 10-3, AT(D+) = ( -11.96 ± 10.04(stat) ± 4.81(syst)) x 10-3 and AT(Ds+) = ( -13.57 ± 7.67(stat) ± 4.82(syst)) x 10-3. This search for CP violation showed that the T-odd correlations are a powerful tool to measure the CP violating observable AT. The relative simplicity of an analysis based on T-odd correlations and the high quality results that can be obtained, allow to consider this tool as fundamental to search for CP violation in four-body decays. Even if the CP violation has not been found, excluding any New Physics effect to the sensitivity of about 0.5%, it is still worth to search for CP violation in D decays. The high statistics that can be obtained at the LHC or by the proposed high luminosity B-factories, make this topic to be considered in high consideration by experiments such as LHCb, SuperB or SuperBelle. The results outlined in this thesis strongly suggest to include a similar analysis into the Physics program of these experiments.

Download or read book Searches for New Physics in CP Violation from BaBar written by and published by . This book was released on 2015 with total page 9 pages. Available in PDF, EPUB and Kindle. Book excerpt: Results of recent searches for new physics in CP violation in charm decays from the BABAR experiment are presented. These results include a measurement of D0 - anti D0 mixing and searches for CP violation in two-body D0 decays, a search for CP violation in the charm decays D" 2!KS0K " and D s" 2!KS0K", KS0[pi]", and a search for direct CP violation in the singly-Cabibbo suppressed D" 2!K+K-[pi]"decays. These studies are based on the fi nal dataset collected by BABAR at the PEP-II B factory at SLAC in the period 1999-2008. No evidence of CP violation is found in these charm decays. The measured mixing parameter yCP = [0.72 " 0.18(stat) " 0.12(syst)]% excludes the no-mixing null hypothesis with a signifi cance of 3.3[sigma].

Download or read book A Search for Direct CP Violation in Two Body Cabibbo Suppressed Decays of Neutral Charmed Mesons written by and published by . This book was released on 2007 with total page 104 pages. Available in PDF, EPUB and Kindle. Book excerpt: Presented are the results of a search for direct CP violation in Cabibbo-suppressed decays of D° to two charged daughters. The analysis described was performed on ≈230 fb−1 of the BABAR data sample, recorded at the Stanford Linear Accelerator Center and using the PEP-II electron storage rings. We measure CP asymmetries for decay to the KK and [pi][pi] final states, as well as for the branching ratio, and develop a new technique for tagging-efficiency correction using the Cabibbo-favored K[pi] final state. We find some evidence for CP violation in decays to the KK final state and results that suggest CP violation in the [pi][pi] final state as well.

Download or read book Deutsche Grundkarte written by and published by . This book was released on 1989 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Measurement of Partial Widths and Search for Direct CP Violation in D0 Meson Decays to K K and Pi Pi written by and published by . This book was released on 2004 with total page 7 pages. Available in PDF, EPUB and Kindle. Book excerpt: The authors present a measurement of relative partial widths and decay rate CP asymmetries in K−K and?−?+ decays of D° mesons produced in p{bar p} collisions at √s = 1.96 TeV. They use a sample of 2 x 105 D*+ → D°?+ (and charge conjugate) decays with the D° decaying to K−?+, K−K+, and?−?+, corresponding to 123 pb−1 of data collected by the CDF II experiment at the Fermilab Tevatron collider. No significant direct CP violation is observed, they measure?(D° → K−K+)/?(D° → K−?+) = 0.0992 ± 0.0011 ± 0.0012,?(D° →?−?+)/?(D° → K−?+) = 0.03594 ± 0.00054 ± 0.00040,?(D° → K−K+)/?(D° →?−?+) = 2.760 ± 0.040 ± 0.034, A{sub CP} (K−K+) = (2.0 ± 1.2 ± 0.6)%, and A{sub CP}(?−?+) = (1.0 ± 1.3 ± 0.6)%, where, in all cases, the first uncertainty is statistical and the second is systematic.

Download or read book High Energy Physics Index written by and published by . This book was released on 1994 with total page 606 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Time Dependent CP Violation Measurements written by Markus Röhrken and published by Springer Science & Business Media. This book was released on 2013-10-17 with total page 205 pages. Available in PDF, EPUB and Kindle. Book excerpt: This thesis describes a high-quality, high-precision method for the data analysis of an interesting elementary particle reaction. The data was collected at the Japanese B-meson factory KEKB with the Belle detector, one of the most successful large-scale experiments worldwide. CP violation is a subtle quantum effect that makes the world look different when simultaneously left and right and matter and antimatter are exchanged. This being a prerequisite for our own world to have developed from the big bang, there are only a few experimental indications of such effects, and their detection requires very intricate techniques. The discovery of CP violation in B meson decays garnered Kobayashi and Maskawa, who had predicted these findings as early as 1973, the 2008 Nobel prize in physics. This thesis describes in great detail what are by far the best measurements of branching ratios and CP violation parameters in two special reactions with two charm mesons in the final state. It presents an in-depth but accessible overview of the theory, phenomenology, experimental setup, data collection, Monte Carlo simulations, (blind) statistical data analysis, and systematic uncertainty studies.

Download or read book A Search for Direct CP Violation in Two body Cabibbo suppressed Decays of Neutral Charmed Mesons written by Christian Julienne Flacco and published by . This book was released on 2006 with total page 228 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Search for CP Violation Using T odd Correlations in D0 to K K pi Pi Decays at BaBar written by and published by . This book was released on 2013 with total page 4 pages. Available in PDF, EPUB and Kindle. Book excerpt: