Download Free Measurement Of Gamma In B To D K Decays With A Dalitz Analysis Of D To K0s Pi Pi Book in PDF and EPUB Free Download. You can read online Measurement Of Gamma In B To D K Decays With A Dalitz Analysis Of D To K0s Pi Pi and write the review.

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}.
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}
This volume presents the peer-reviewed proceedings of the XXIII DAE-BRNS High Energy Physics Symposium 2018, which was held at the Indian Institute of Technology Madras, India, on 10-15 December 2018. Gathering selected contributions, the book highlights the latest developments and research trends in physics, detectors and instrumentation relevant to all branches of particle physics, astroparticle physics and closely related fields. The major topics covered include Standard Model physics, beyond Standard Model physics, neutrino physics, cosmology, formal theory, heavy ion physics & quantum chromodynamics (QCD), particle detectors and future experiments. Given the range of topics discussed, the book will be useful for beginners as well as advanced researchers in the field.
The CP violation is explained in the Standard Model with three quark generations with an irreducible phase in the Cabibbo-Kobayashi-Maskawa quark mixing matrix. The unitarity of this matrix can be represented in a complex plane as a triangle (called Unitarity Triangle). The measurement of the parameters of the triangle is a powerful test of the Standard Model description of the CP violation. This thesis tries to measure the weak phase 2beta+ gamma through the B0 -> D+ K0 Pi- decays. Respect to the two body decays B0 -> D(*)+ Pi- and B0 -> D+ Rho- presently used for the measurement of the same weak phase, the B0 -> D+ K0 Pi- decays should show up a larger CP asymmetry and does not rely on any theoretical assumption. After a review of all the methods for the measurement of 2beta+gamma, the thesis presents the results of a feasibility study of the measurement with the B0 -> D+ K0 Pi- decays . In a second part, the analysis performed on 316 fb-1 of data collected by the BaBar detector at the B-factory PEP2 is presented, from the selection of the events to the time-dependent Dalitz fit technique used in order to extract the weak phase 2beta+gamma as well as the amplitudes and phases of the intermediate resonances contributing to the decay. The result of the analysis gives the following estimation: 2beta+gamma = 89 +/- 53(stat) +23-14(syst) degrees with an irreducible ambiguity of 180 degrees.
This book presents the latest results on the branching fraction and phase space distribution of B0 and Bs0 decays into final states including excited neutral charm mesons. This work represents four years of research, and the book describes in detail all the necessary steps and techniques required to perform a physics analysis of the data recorded by the LHCb experiment in the years 2016–2018. Although the results presented in this book represent the first measurement of such decays, the text is written in a manner accessible to Ph.D. students and early career researchers. Thus, all the contents included in this book are described in a pedagogical way, including technical details that would allow the results to be reproduced in future. In addition to the methodology used to perform these measurements, the book also includes a description of the theoretical background required to interpret the results presented, as well as a technical description of the LHCb detector, which provided the data sample used in this study.
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.
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.
The authors report a Dalitz-plot analysis of the charmless hadronic decays of neutral B mesons to K{sup ±}?{sup {-+}}?°. With a sample of (231.8 ± 2.6) x 106?(4S) → B{bar B} decays collected by the BABAR detector at the PEP-II asymmetric-energy B Factory at SLAC, they measure the magnitudes and phases of the intermediate resonant and nonresonant amplitudes for B° and {bar B}° decays and determine the corresponding CP-averaged branching fractions and charge asymmetries. The inclusive branching fraction and CP-violating charge asymmetry are measured to be?(B° → K?−?°) = (35.7{sub -1.5}{sup +2.6} ± 2.2) x 10−6, and?{sub CP} = -0.030{sub -0.051}{sup +0.045} ± 0.055 where the first errors are statistical and the second systematic. They observe the decay B° → K*°(892)?° with the branching fraction?(B° → K*°(892)?°) = (3.6{sub -0.8}{sup +0.7} ± 0.4) x 10−6. This measurement differs from zero by 5.6 standard deviations (including the systematic uncertainties). The selected sample also contains B° → {bar D}°?° decays where {bar D}° → K+?−, and they measure?(B° → {bar D}°?°) = (2.93 ± 0.17 {+-} 0.18) x 10−4.
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}