Download or read book Determination of the B hadron Production Cross section and Measurement of CP Violation in B s 0 Decays at the LHCb Experiment written by Max Neuner and published by . This book was released on 2017 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Studies of CP Violation in Charmless Three Body b Hadron Decays written by Daniel O'Hanlon and published by Springer. This book was released on 2018-11-02 with total page 225 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book highlights two essential analyses of data collected during the LHCb experiment, based on the Large Hadron Collider at CERN. The first comprises the first observation and studies of matter-antimatter asymmetries in two three-body b-baryon decays, paving the way for more precise measurements of the relatively unknown decay properties of b-baryon decays. The second is an analysis of a charged B meson decay to three charged pions, where previously large matter-antimatter asymmetries were observed in a model-independent analysis. Here a model of the decay amplitude is constructed using the unitarity-conserving ‘K-matrix’ model for the scalar contributions, so as to gain an understanding of how the previously observed matter-antimatter asymmetries arise; further, the model’s construction yields the most precise and comprehensive study of this decay mode to date.
Download or read book Study of Double Charm B Decays with the LHCb Experiment at CERN and Track Reconstruction for the LHCb Upgrade written by Renato Quagliani and published by Springer. This book was released on 2018-11-04 with total page 277 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book discusses the study of double charm B decays and the first observation of B0->D0D0Kst0 decay using Run I data from the LHCb experiment. It also describes in detail the upgrade for the Run III of the LHCb tracking system and the trigger and tracking strategy for the LHCb upgrade, as well as the development and performance studies of a novel standalone tracking algorithm for the scintillating fibre tracker that will be used for the LHCb upgrade. This algorithm alone allows the LHCb upgrade physics program to achieve incredibly high sensitivity to decays containing long-lived particles as final states as well as to boost the physics capabilities for the reconstruction of low momentum particles.
Download or read book First Observation of Fully Reconstructed B0 and Bs0 Decays into Final States Involving an Excited Neutral Charm Meson in LHCb written by Arnau Brossa Gonzalo and published by Springer Nature. This book was released on 2023-01-31 with total page 241 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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.
Download or read book Measurement of CP Violation in B 0 J K 0 S Decays with the LHCb Experiment written by Julian Tarek Wishahi 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 CP Violation in B s 0 J psi phi Decays written by Sabato Leo and published by Springer. This book was released on 2014-07-24 with total page 146 pages. Available in PDF, EPUB and Kindle. Book excerpt: This thesis reports on the final measurement of the flavor-mixing phase in decays of strange-bottom mesons (B_s) into J/psi and phi mesons performed in high-energy proton-antiproton collisions recorded by the Collider Experiment at Fermilab. Interference occurs between direct decays and decays following virtual particle-antiparticle transitions (B_s-antiB_s). The phase difference between transition amplitudes (“mixing phase”) is observable and extremely sensitive to contributions from non-standard-model particles or interactions that may be very hard to detect otherwise – a fact that makes the precise measurement of the B_s mixing phase one of the most important goals of particle physics. The results presented include a precise determination of the mixing phase and a suite of other important supplementary results. All measurements are among the most precise available from a single experiment and provide significantly improved constraints on the phenomenology of new particles and interactions.
Download or read book B Physics And Cp Violation Proceedings Of The 2nd International Conference written by Thomas E Browder and published by World Scientific. This book was released on 1998-04-04 with total page 528 pages. Available in PDF, EPUB and Kindle. Book excerpt: CP violation is one of the most subtle effects in the Standard Model of particle physics and may be the first clue to the physics that lies beyond. Charge conjugation, C, and parity, P, are symmetries of particle interactions. C corresponds to the operation of replacing a particle by its antiparticle, while P is the operation of mirror reflection. Before 1956, it was believed that these were also symmetries of the interactions of elementary particles. In 1956, C S Wu found evidence for P violation in the weak interaction. Theorists proposed that the combination of CP would be a symmetry of the weak interaction. In 1964, Christenson, Cronin, Fitch and Turlay found the first evidence for the violation of CP symmetry in the decays of kaons.Although Kobayashi and Maskawa then showed how the Standard Model can accommodate the observed CP violation, Wolfenstein pointed out that it is also possible that there is a new interaction in addition to the usual four, called the superweak interaction, which is responsible for the asymmetry. To test this idea, the observation of a different type of asymmetry, called direct CP violation, is required; in the kaon sector, very precise measurements of the ratio of kaon decay rates are necessary. In B decay modes where a second order weak process whimisically named “penguin” interferes with another suppressed, first order “tree” amplitude, it may also be possible to observe these direct CP-violating effects.B physics and CP violation is now one of the major growth areas in high energy physics. Nearly every major high energy physics laboratory now has a project underway to observe the large CP asymmetries expected in the B sector and to test the consistency of the Standard Model. The unitarity of the Kobayashi-Maskawa mixing matrix in the Standard Model implies the existence of three phases, called alpha, beta and gamma, which can be determined by the measurements of CP asymmetries in B decays. About 200 participants gathered in Hawaii in March 1997 to discuss the progress in the field, and this important book constitutes the proceedings of that conference.
Download or read book RICH Detector Time Alignment and Studies of CP Violation in the Decay B0s at the LHCb Experiment written by Nicholas A. Styles and published by . This book was released on 2010 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: LHCb is a high-precision experiment dedicated to measuring the decays of B hadrons. Particle identification at LHCb relies upon two Ring Imaging Cherenkov (RICH) detectors, and this thesis describes work carried out relating to these detectors. It includes an analysis performed to investigate ion feedback in the Hybrid Photon Detectors (HPDs) used as photosensors for the RICH system, and studies of the performance of a RICH prototype in test beam conditions. A time alignment system for the RICH detectors has been designed and implemented, and this work is presented here. Excellent particle identification performance is required for efficient reconstruction of the b → s penguin decay B0s → ØØ a channel in which visible New Physics effects are possible. An analysis of this decay has been performed, encompassing event selection at trigger and offline levels, resolution, tagging and acceptance studies, and toy monte carlo experiments on sensitivity and systematic errors in measuring the total weak phase. The results are discussed within.
Download or read book BCP4 written by A. Ichiro Sanda and published by World Scientific. This book was released on 2001 with total page 388 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book offers the first strong evidence of the existence of CP violation in neutral B decays extracted from sophisticated B factories in the US and Japan. It also holds out the expectation of rare B decays and D, K physics in the near future. In addition, new physics beyond the Standard Model is described. Both experimental and theoretical points of view are given.
Download or read book Time dependent Measurement of CP Violation and Determination of the CKM Angle Gamma Using Bs DsKpipi Decays with the LHCb Experiment written by Matthieu Kecke and published by . This book was released on 2019* with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
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 CP Violation written by Gustavo C. Branco and published by Oxford University Press. This book was released on 1999 with total page 546 pages. Available in PDF, EPUB and Kindle. Book excerpt: The violation of charge-conjugation and parity symmetries is a leading area of research in particle and nuclear physics, with important implications for understanding the generation of matter in the universe. This book provides a self-contained introduction and is designed to bring beginning researchers to the forefront of the field.
Download or read book A Study of Direct CP violation in Charged B meson Decays with the LHCb Experiment written by Gareth James Rogers and published by . This book was released on 2012 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Experimental Possibilities for Observation of CP Violation in B Decay written by and published by . This book was released on 1988 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The detection and the measurement of CP violation in the decays of B hadrons will require the accumulation of large numbers of B decays in particular exclusive modes. The potential of beauty hadroproduction experiments for obtaining these large data samples is examined in the context of various trigger and analysis strategies. The possibilities for doing such experiments at present hadron machines is compared with the potential for such experiments at the SSC. 3 refs., 3 figs., 4 tabs.
Download or read book Observation of CP Violation in the B sup 0 Meson System written by and published by . This book was released on 2001 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: We present an updated measurement of time-dependent CP-violating asymmetries in neutral B decays with the BABAR detector at the PEP-II asymmetric B Factory at SLAC. This result uses an additional sample of[Upsilon](4S) decays collected in 2001, bringing the data available to 32 million B[bar B] pairs. We select events in which one neutral B meson is fully reconstructed in final state containing charmonium and the flavor of the other neutral B meson is determined from its decay products. The amplitude of the CP-violating asymmetry, which in the Standard Model is proportional to sin2[beta], is derived from the decay time distributions in such events. The result sin2[beta]= 0.59[+-] 0.14 (stat)[+-] 0.05 (syst) establishes CP violation in the B[sup 0] meson system. We also determine[lambda]= 0.93[+-] 0.09 (stat)[+-] 0.03 (syst), consistent with no direct CP violation.
Download or read book Measurement of CP Violation in B DK Decays with the LHCb Experiment written by Edmund Robert Henry Smith 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 Measurement of the B Hadron Production Cross Section Using Decays to MU D0 X Final States in P Anti p Collisions at S written by and published by . This book was released on 2009 with total page 26 pages. Available in PDF, EPUB and Kindle. Book excerpt: We report a measurement of the production cross section for b hadrons in p{bar p} collisions at √s = 1.96 TeV. Using a data sample derived from an integrated luminosity 83 pb−1 collected with the upgraded Collider Detector (CDF II) at the Fermilab Tevatron, we analyze b hadrons, H{sub b}, partially reconstructed in the semileptonic decay mode H{sub b} →?− D° X. Our measurement of the inclusive production cross section for b hadrons with transverse momentum p{sub T}> 9 GeV/c and rapidity.
