Download or read book Improved Measurement of the CKM Angle Gamma in B to D K Decays with a Dalitz Plot Analysis of D Decays to K S0 Pi Pi and K S0 K K written by and published by . This book was released on 2008 with total page 22 pages. Available in PDF, EPUB and Kindle. Book excerpt: We report on an improved measurement of the Cabibbo-Kobayashi-Maskawa CP-violating phase? through a Dalitz plot analysis of neutral D meson decays to K{sub s}°??− and K{sub s}°K+K− produced in the processes B{sup {-+}} → DK{sup {-+}}, B{sup {-+}} → D* K{sup {-+}} with D* → D?°, D?, and B{sup {-+}} → DK*{sup {-+}} with K8{sup {-+}} → K{sub S}°?{sup {-+}}. Using a sample of 383 million B{bar B} pairs collected by the BABAR detector, we measure? = (76 ± 22 ± 5± 5){sup o} (mod 180{sup o}), where the first error is statistical, the second is the experimental systematic uncertainty and the third reflects the uncertainty on the description of the Dalitz plot distributions. The corresponding two standard deviation region is 29{sup o}

Download or read book Measurement of the CKM Angle Gammma With B D K0 S Pi Pi K Decays in BaBar written by and published by . This book was released on 2007 with total page 5 pages. Available in PDF, EPUB and Kindle. Book excerpt: We report on the measurement of the Cabibbo-Kobayashi-Maskawa angle? through a Dalitz analysis of neutral D decays to K-short?−? in the processes B{sup {minus_plus}} → D(*)K{sup {minus_plus}} and B{sup {minus_plus}} → DK*{sup {minus_plus}}, D* → D?°, D?, with the BaBar detector at the SLAC PEP-II e+e− asymmetric-energy collider.

Download or read book Measurement of Gamma in B to D K and B to D K Decays with a Dalitz Analysis of D to Ks Pi Pi written by J. C. Chen and published by . This book was released on 2005 with total page 22 pages. Available in PDF, EPUB and Kindle. Book excerpt: We present a measurement of the Cabibbo-Kobayashi-Maskawa CP-violating phase {gamma} with a Dalitz plot analysis of neutral D-meson decays to the K{sub S}{sup 0} {pi}{sup -}{pi}{sup +} final state from B{sup {-+}} {yields} D{sup (*)}K{sup {-+}} and B{sup {-+}} {yields} DK*{sup {-+}} decays, using a sample of 227 million B{bar B} pairs collected by the BABAR detector. We measure {gamma} = (67 {+-} 28 {+-} 13 {+-} 11){sup o}, where the first error is statistical, the second is the experimental systematic uncertainty and the third reflects the Dalitz model uncertainty. This result suffers from a two-fold ambiguity. The contribution to the Dalitz model uncertainty due to the description of the {pi}{pi} S-wave in D{sup 0} {yields} K{sub S}{sup 0}{pi}{sup -}{pi}{sup +}, evaluated using a K-matrix formalism, is found to be 3{sup o}.

Download or read book Measurement of the CKM Angle Gamma in B0 to Anti D0 D0 K 0 With a Dalitz Analysis of D0 to K S 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 the angle? of the Unitarity Triangle with a Dalitz analysis of neutral D decays to K{sub S}??− from the processes B° → {bar D}°(D°)K*° ({bar B}° → D°({bar D}°){bar K}*°) with K*° → K+?− ({bar K}*° → K−?+). Using a sample of 371 x 106 B{bar B} pairs collected with the BABAR detector at PEP II, they measure the angle? as a function of r{sub S}, the magnitude of the average ratio between b → u and b → c amplitudes. Combining this result with the available information on r{sub S}, they obtain? = (162 ± 56){sup o} or (342 ± 56){sup o} and r{sub S}

Download or read book Measurement of Gamma in B to D K Decays with a Dalitz Analysis of D to K0s Pi Pi written by and published by . This book was released on 2005 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: We report on a measurement of the Cabibbo-Kobayashi-Maskawa CP-violating phase? through a Dalitz analysis of neutral D decays to K{sub s}°?−? in the processes B{sup {-+}} → D{sup (*)} K{sup {-+}}, D* → D?°, D?

Download or read book Measurement of the CKM Angle with a D0 Dalitz Analysis of the B D K Decays in BABAR written by Nicola Neri and published by . This book was released on 2005 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Measurement of the CKM Angle Gamma in B to D K Decays With the BaBar Detector written by and published by . This book was released on 2007 with total page 8 pages. Available in PDF, EPUB and Kindle. Book excerpt: We report on the measurement of the CKM angle [gamma] in B{sup {+-}} → DK{sup {+-}} decays with the BABAR detector. A general overview of different methods of analysis and a critical discussion of the most sensitive methods are presented here.

Download or read book Dalitz Analysis of Ds K K Pi written by and published by . This book was released on 2011 with total page 20 pages. Available in PDF, EPUB and Kindle. Book excerpt: We perform a Dalitz plot analysis of about 100,000 D{sub s}+ decays to K+K−?+ and measure the complex amplitudes of the intermediate resonances which contribute to this decay mode. We also measure the relative branching fractions of D{sub s}+ → K+K+?− and D{sub s}+ → K+K+K−. For this analysis we use a 384 fb−1 data sample, recorded by the BABAR detector at the PEP-II asymmetric-energy e+e− collider running at center-of-mass energies near 10.58 GeV.

Download or read book Time dependent Dalitz Plot Analysis of B0 to D K0Pi Decays written by and published by . This book was released on 2008 with total page 8 pages. Available in PDF, EPUB and Kindle. Book excerpt: We present for the first time a measurement of the weak phase 2[beta] + [gamma] obtained from a time-dependent Dalitz plot analysis of B° → D{sup {-+}}K°[pi]{sup ±} decays. Using a sample of approximately 347 x 106 B{bar B} pairs collected by the BABAR detector at the PEP-II asymmetric-energy storage rings, we obtain 2[beta] + [gamma] = (83 ± 53 ± 20)° and (263 ± 53 {+-} 20){sup o} assuming the ratio r of the b → u and b → c decay amplitudes to be 0.3. The magnitudes and phases for the resonances associated with the b → c transitions are also extracted from the fit.

Download or read book Constraints on the CKM Angle gamma gamma and Strong Phases from B pi K decays pi K decays written by Andrzej J. Buras and published by . This book was released on 2000 with total page 16 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Expected Accuracy in a Measurement of the CKM Angle Alpha Using a Dalitz Plot Analysis of B0 Rho Pi Decays in the BTeV Project written by and published by . This book was released on 2005 with total page 26 pages. Available in PDF, EPUB and Kindle. Book excerpt: A precise measurement of the angle [alpha] in the CKM triangle is very important for a complete test of Standard Model. A theoretically clean method to extract [alpha] is provided by B° → [rho][pi] decays. Monte Carlo simulations to obtain the BTeV reconstruction efficiency and to estimate the signal to background ratio for these decays were performed. Finally the time-dependent Dalitz plot analysis, using the isospin amplitude formalism for tre and penguin contributions, was carried out. It was shown that in one year of data taking BTeV could achieve an accuracy on [alpha] better than 5{sup o}.

Download or read book Measurement of the CKM Angle in B DK and B D decays with D K0Sh h written by Roel Aaij and published by . This book was released on 2020 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Measuring Gamma With B0 to D0 K 0 Decays at Babar written by and published by . This book was released on 2007 with total page 4 pages. Available in PDF, EPUB and Kindle. Book excerpt: We present a feasibility study for a new analysis for extracting the angle of the Unitarity Triangle from the study of the neutral B meson decays. We reconstruct the decay channel B° → {bar D}°K*° with the K*° → K?− and the {bar D}° → K{sub S}?+?− using a D° Dalitz analysis technique. The sensitivity to the angle comes from the interference of the b → c and b → u processes contributing to the same final state and by the fact that the B°({bar B}°) can be unambiguously identified through the sign of electric charge of the kaon from K*°({bar K}*°) decay. The impact of the result of such analysis is evaluated for the actual BaBar statistics.

Download or read book Measurements of the CKM Angle Phi3 gamma written by and published by . This book was released on 2007 with total page 11 pages. Available in PDF, EPUB and Kindle. Book excerpt: We present a review on the measurements of the CKM angle [gamma] ([phi]3)1 as performed by the BABAR and Belle experiments at the asymmetric-energy ee− B factories colliders PEP-II and KEKB. These measurements are using either charged or neutral B decays. For charged B decays the modes {tilde D}°K−, {tilde D}*°K−, and {tilde D}°K*− are employed, where {tilde D}° indicates either a D° or a {bar D}° meson. Direct CP violation is exploited. It is caused by interferences between V{sub ub} and V{sub cb} accessible transitions that generate asymmetries in the final states. For these decays various methods exist to enhance the sensitivity to the V{sub ub} transition, carrying the weak phase [gamma]. For neutral B decays, the modes D{sup (*){+-}}[pi]{sup {-+}} and D{sup {+-}}[rho]{sup {-+}} are used. In addition to the V{sub ub} and V{sub cb} interferences, these modes are sensitive to the B°-{bar B}° mixing, so that time dependent analyses are performed to extract sin(2[beta] + [gamma]). An alternative method would use the lower branching ratios decay modes {tilde D}{sup (*)0}{bar K}{sup (*)0} where much larger asymmetries are expected. The various available methods are mostly ''theoretically clean'' and always free of penguins diagrams. In some cases a high sensitivity to [gamma] is expected and large asymmetries may be seen. But these measurements are always experimentally difficult as one has to face with either low branching ratios, or small asymmetries, or additional technical/theoretical difficulties due to Dalitz/SU(3) and re-scattering models needed to treat/estimate nuisance parameters such as unknown strong phases and the relative magnitude of the amplitude of the interfering ''V{sub ub}'' transitions. Thus at the present time only a relatively limited precision on [gamma] can be extracted from these measurements. The current world average is [gamma] = (7826{sup +19}){sup o} [1]. For other methods and long term perspectives, as discussed in details, the reader is invited to consult the proceedings of the recent CKM workshop that was held in Nagoya (Japan) in December 2006 [2].

Download or read book B Decays written by Sheldon Stone and published by World Scientific. This book was released on 1994 with total page 676 pages. Available in PDF, EPUB and Kindle. Book excerpt: This 2nd edition is an extensive update of "B Decays?. The revisions are necessary because of the extensive amount of new data and new theoretical ideas. This book reviews what is known about b-quark decays and also looks at what can be learned in the future.The importance of this research area is increasing, as evidenced by the approval of the luminosity upgrade for CESR and the asymmetric B factories at SLAC and KEK, and the possibility of experiments at hadron colliders.The key experimental observations made thus far, measurement of the lifetimes of the different B species, B0-B0 mixing, the discovery of ?Penguin? mediated decays, and the extraction of the CKM matrix elements Vub and Vcb from semileptonic decays, as well as more mundane results, are described in great detail by the experimentalists who have been closely involved with making the measurements. Theoretical progress in understanding b-quark decays using HQET and lattice gauge techniques are described by theorists who have developed and used these techniques.Synthesizing the experimental and theoretical information, several articles discuss the implications for the ?Standard Model? and how further tests can be done using measurements of CP violation in the B system.

Download or read book Dalitz Plot Analysis of D0 Hadronic Decays D0 K0K pi D0 antiK0K pi and D0 antiK0K K written by and published by . This book was released on 2002 with total page 5 pages. Available in PDF, EPUB and Kindle. Book excerpt: A Dalitz plot analysis of the D° hadronic decays D° → K°K−?, D° → {bar K}° K+?− and D° → {bar K}° K+ K− is presented. This analysis is based on a data sample of 22 fb−1 collected with the BABAR detector at the PEP-II asymmetric-energy B Factory at SLAC running on or near the?(4S) resonance. The events are selected from continuum e+e− annihilations using the decay D*+ → D°?+. Preliminary measurements of the branching fractions of the above hadronic decays are obtained. Preliminary estimates of fractions and phases for resonant and nonresonant contributions to the Dalitz plot are also presented.

Download or read book Constraints on the CKM Angle gamma gamma and Strong Phases from B PK pi K Decays written by Andrzej J. Buras and published by . This book was released on 2000 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: