Download or read book Bd Mixing Measurements with the Babar Detector written by and published by . This book was released on 2003 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The B[sup 0][bar B][sup 0] oscillation frequency[Delta] m[sub d] has been measured with the BABAR detector at the PEP-II asymmetric B factory with different experimental techniques. The discussion here is focused on the recent simultaneous measurement of[Delta] m[sub d] and[tau][sub B[sup 0]] with exclusively reconstructed B[sup 0][yields] D*[sup -][ell][sup+][nu][sub l] decays, based on 23 million B[bar B] pairs collected by BABAR. The measurements of[Delta] m[sub d] with fully reconstructed hadronic decays and with dilepton events are also reviewed. The average BABAR result is[Delta] m[sub d]= 0.500[+-] 0.008[+-] 0.006 ps[sup -1].

Download or read book B Mixing and Lifetime Measurements with the BaBar Detector written by and published by . This book was released on 2001 with total page 5 pages. Available in PDF, EPUB and Kindle. Book excerpt: Recent BABAR measurements on lifetime and mixing of B mesons are reported. Various techniques are used, ranging from the full reconstruction of hadronic B decays, to partial reconstruction techniques, and to a totally inclusive approach with dilepton events. The results presented are based on a data sample collected by BABAR during the 1999-2000 data taking, and should be considered as preliminary.

Download or read book A Measurement of Neutral B Mixing Using Di Lepton Events with the BaBar Detector written by and published by . This book was released on 2000 with total page 149 pages. Available in PDF, EPUB and Kindle. Book excerpt: This thesis reports on a measurement of the neutral B meson mixing parameter, [Delta]md, at the BABAR experiment and the work carried out on the electromagnetic calorimeter (EMC) data acquisition (DAQ) system and simulation software.

Download or read book 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 published by . This book was released on 2001 with total page 322 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Bd Mixing and Lifetimes from Dileptons at the BABAR Experiment written by Michael John Kay and published by . This book was released on 2002 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Measurement of the CKM Angle Alpha at the BABAR Detector Using B Meson Decays to Rho Final States written by Attila Mihalyi and published by . This book was released on 2005 with total page 198 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Evidence for D0 Anti D0 Mixing at Babar written by and published by . This book was released on 2007 with total page 6 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Proceedings of the Third International Conference on B Physics and CP Violation written by Hai-Yang Cheng and published by World Scientific. This book was released on 2000 with total page 554 pages. Available in PDF, EPUB and Kindle. Book excerpt: Proceedings of the Third International Conference on B Physics and CP Violation, held in Taipei, Taiwan, December 3-7, 1999. The main focus of the conference was to discuss the state of the art and future prospects of the field, at a high technical level. The fifth conference is to be held in May 2002 in Philadelphia. The Fourth took place in Central Japan in February 2001.zation.

Download or read book D0 Anti D0 Mixing Results From BaBar with D0 to K Pi Pi0 written by and published by . This book was released on 2007 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: We present a preliminary search for D°-{bar D}° mixing using the decays D° → K?−?°, additionally presenting Dalitz-plot distributions and a measurement of the branching ratio for this mode. A new tagging technique is used to produce the doubly Cabibbo-suppressed Dalitz plot, which in turn is used to motivate the method used for the D-mixing search. We analyze 230.4 fb−1 of data collected from the BABAR detector at the PEP-II collider. Assuming CP conservation, we find R{sub M}

Download or read book Measurements of Rates Asymmetries and Angular Distributions in Bd Kl l and Bd K l l Decays written by Jonathan Hollar and published by . This book was released on 2006 with total page 134 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Measurements of B0 and B Lifetimes and B0 anti B0 Mixing with Fully Reconstructed B Decays in BABAR written by and published by . This book was released on 2000 with total page 5 pages. Available in PDF, EPUB and Kindle. Book excerpt: Time-dependent B°{bar B}° flavor oscillations and B° and B lifetimes are studied in a sample of fully reconstructed B mesons collected with the BABAR detector, running at the PEP-II asymmetric ee− B Factory with center-of-mass energies near the [Upsilon](4S) resonance. This is the first time that time-dependent mixing and lifetime measurements have been performed at [Upsilon](4S) energies.

Download or read book Measurement of D0 overline D0 Mixing Using the Ratio of Lifetimes for the Decays D0 to K pi K K and pi pi written by and published by . This book was released on 2008 with total page 8 pages. Available in PDF, EPUB and Kindle. Book excerpt: The authors present a measurement of D°-{bar D}° mixing parameters using the ratios of lifetimes extracted from a sample of D° mesons produced through the process D* → D°?+, that decay to K−?+, I−K+, or?−?+. the Cabibbo-suppressed modes K−K+ and?−?+ are compared to the Cabibbo-favored mode K−?+ to obtain a measurement of ycp, which in the limit of CP conservation corresponds to the mixing parameter y. The analysis is based on a data sample of 384 fb−1 collected by the BABAR detector at the PEP-II asymmetric-energy e+e− collider. They obtain ycp = [1.24 ± 0.39(stat) ± 0.13(syst)]%, which is evidence of D°-{bar D}° mixing at the 3? level, and?Y = [-0.26 ± 0.36(stat) ± 0.08(syst)]%, where?Y constrains possible CP violation. Combining this result with a previous BABAR measurement of ycp obtained from a separate sample of D° → K−K+ events, they obtain ycp = [1.03 ± 0.33(stat) ± 0.19(syst)]%.

Download or read book Measurement of CP Violation in B Anti B Mixing on the Recoil of Partially Reconstructed Anti B0 to D L Anti Nu L Using Kaon Tags written by and published by . This book was released on 2011 with total page 194 pages. Available in PDF, EPUB and Kindle. Book excerpt: After its formulation in 1960's the Standard Model of Fundamental Interactions has gone through an impressive series of successes, begun with the discovery of neutral weak currents [1] and the experimental observations of the massive carriers of weak interactions, the W± and Z0 bosons [2], [3]. High precision measurements performed at LEP and SLAC test the validity of the theory to an unprecedented level of accuracy and do not show any significant deviations with respect to the Standard Model predictions. One of the attractive features of the Standard Model is the description of the phenomena which violate the matter-antimatter symmetry (CP), and this violation uniquely depends (in the quark sector) on a weak phase in the matrix describing the couplings among different quark flavors. CP-violation was discovered in 1964 as a tiny effect in the mixing of the K0 - $\bar{K}$0 system [12] but, after a few decades of study of the physics of K mesons, no strong confirmation of the Standard Model can be obtained on the mechanism which generates CP-violation. On the other hand the physics of B mesons is suitable for a pretty large number of measurements which can confirm or disprove this aspect of the theory. The main goal of the BABAR and Belle experiments physics program is to test the description of CP-violation and flavor physics mainly from the decays of Bu and Bd mesons. Soon after the beginning of data-taking in 1999, CP-violation was discovered in the interference between mixing and decay in the golden channel B0 → J/[Psi]}K0 [17] [18], while in 2004 a large direct charge asymmetry was observed in the B0 → K+[pi]- channel [16]. There is a third kind of CP-violation which can be exhibited by the Bd - $\bar{B}$d system, the so called CP-violation in mixing. The Standard Model predicts this asymmetry to be small, possibly out of reach of current experiments, but several New Physics models contain new particles and couplings which can enhance it up to detectable levels. In this thesis we search for CP-violation in Bd - $\bar{B}$d mixing at the BABAR experiment. We reconstruct one of the two B mesons produced at the PEP-II electromagnetic collider using the partial reconstruction technique, while the flavor of the other B is inferred by the charge of a kaon identified among its decay products. Given the smallness of the physical asymmetry we want to measure, a crucial aspect of this analysis is the control of spurious charge asymmetries arising from the interaction of particles with the detector material. We accomplish this by using a control sample of charged kaons on the same data we use in our analysis. After a brief introduction of the theoretical framework and the phenomenology of the decays of B mesons at a B-factory (chapters 1 and 2), we will review in chapter 3 the current experimental results on this topic. We will then describe the characteristics of the collider and the experimental apparatus (chapter 4) used to perform our measurement. The available dataset and the event pre-selection techniques are treated in chapter 5, while the analysis method is discussed in detail in the following one. In chapters 7 and 8 the definitions of the probability density functions used to model each component of our sample are given and then they are tested in samples of simulated data. Toy and reweighted Monte Carlo data are used in chapter 9 to test the sensitivity of our fitting procedure to the physical parameters related to CP violation; chapter 10 discusses the possibility of modeling some of the components of our sample directly on the data. Finally the fit on the real data sample is described in chapter 11 and the treatment of systematic uncertainties is done in chapter 12, while the final result is given in chapter 13.

Download or read book Measurement of D 0 bar D 0 Mixing From a Time Dependent Amplitude Analysis of D 0 K pi pi0 Decays written by and published by . This book was released on 2008 with total page 7 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book D0 Anti D0 Mixing Results From BaBar By Analysis of D0 K Pi Pi0 Dalitz Plot Regions written by M. G. Wilson and published by . This book was released on 2006 with total page 5 pages. Available in PDF, EPUB and Kindle. Book excerpt: We present a preliminary search for D{sup 0}-{bar D}{sup 0} mixing using the decays D{sup 0} {yields} K{sup +}{pi}{sup -}{pi}{sup 0}, additionally presenting Dalitz-plot distributions and a measurement of the branching ratio for this mode. A new tagging technique is used to produce the doubly Cabibbo-suppressed Dalitz plot, which in turn is used to motivate the method used for the D-mixing search. We analyze 230.4 fb{sup -1} of data collected from the BABAR detector at the PEP-II collider. Assuming CP conservation, we find R{sub M}

Download or read book Heavy Flavour Physics Theory and Experimental Results in Heavy Quark Physics written by C.T.H Davies and published by CRC Press. This book was released on 2019-03-29 with total page 415 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book provides a thorough introduction to the phenomenology of heavy flavour physics, those working on the B-factories, LHCb, BTeV, HERA and the Tevatron. It explains how heavy quark theory could be implemented on the lattice, and discusses the status of CP-violation in the neutral kaon system.

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}