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Study Of Direct Cp Violation In B J Psi K Pi File Decays
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Book Synopsis Study of Direct CP Violation in B+- ---] J/psi K+- (pi+- ) File Decays by :
Download or read book Study of Direct CP Violation in B+- ---] J/psi K+- (pi+- ) File 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: The authors present a search for direct CP violation in B{sup ±} 2!J/[psi]K{sup ±}[pi]{sup ±} decays. The event sample is selected from 2.8 fb−1 of p{bar p} collisions recorded by D0 experiment in Run II of the Fermilab Tevatron Collider. The charge asymmetry A{sub CP}(B 2!J/[psi]K) = +0.0075 ± 0.0061(stat.) {+-} 0.0027(syst.) is obtained using a sample of approximately 40 thousand B{sup {+-}} 2!J/[psi]K{sup {+-}} decays. The achieved precision is of the same level as the expected deviation predicted by some extensions of the standard model. They also measured the charge asymmetry A{sub CP}(B+ 2!J/[psi][pi]+) = -0.09 {+-} 0.08(stat.){+-}0.03(syst.).
Book Synopsis Measurement of Direct CP Violation Parameters in $B\̂pm \to J/\psi K\̂pm$ and $B\̂pm \to J/\psi \pi\̂pm$ Decays with 10.4 Fb${̂-1}$ of Tevatron Data by :
Download or read book Measurement of Direct CP Violation Parameters in $B\̂pm \to J/\psi K\̂pm$ and $B\̂pm \to J/\psi \pi\̂pm$ Decays with 10.4 Fb${̂-1}$ of Tevatron Data written by and published by . This book was released on 2013 with total page 7 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book CP Violation in K and B Decays written by and published by . This book was released on 1997 with total page 16 pages. Available in PDF, EPUB and Kindle. Book excerpt: The author reviews basic aspects of the phenomenology of CP violation in the decays of K and B mesons. In particular he discusses the commonly used classification of CP violation--CP violation in the mass matrix, in the interference of mixing with decay, and in the decay amplitude itself--and the related notions of direct and indirect CP violation. These concepts are illustrated with explicit examples. The author also emphasizes the highlights of this field including the clean observables B(K{sub L} → [pi]°[nu]{anti {nu}}) and A{sub CP} (B → J/[Psi]K{sub S}). The latter quantity serves to demonstrate the general features of large, mixing induced CP violation in B decays.
Book Synopsis CP Violation in {B_s}^0 -> J/psi.phi Decays by : Sabato Leo
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.
Book Synopsis Measurement of the Branching Fraction And Search for Direct CP-Violation in the B+- --] J/Psi Pi+- Decay Mode at BaBar by : Francesco Fobozzi
Download or read book Measurement of the Branching Fraction And Search for Direct CP-Violation in the B+- --] J/Psi Pi+- Decay Mode at BaBar written by Francesco Fobozzi and published by . This book was released on 2006 with total page 139 pages. Available in PDF, EPUB and Kindle. Book excerpt: The phenomenon of CP-violation in weak interactions, discovered in 1964 in decays of neutral kaons, receives a simple and elegant explanation in the Standard Model with three generations of quarks. Indeed, in this model the common source of CP-asymmetry phenomena is represented by a simple complex phase in the unitary matrix (the Cabibbo-Kobayashi-Maskawa matrix) describing the charged weak couplings of the quarks. This simple scheme has never received an accurate validation, because the phenomenological parameters determined from measurements of CP-violation in kaons decays are related to the fundamental parameters of the theory in a complex way, sensitive to large theoretical uncertainties. On the contrary, decays of neutral B mesons like B{sup 0} {yields} J/{psi} K{sub S}{sup 0} represent a unique laboratory to test the predictions of the theory because they are expected to show significant CP-violation effects, the magnitude of which is cleanly related to the Standard Model parameters. Thus experimental facilities have been built with the purpose of performing extensive studies of B decays. The BABAR experiment is operating at one of these facilities, at the Stanford Linear Accelerator Center. It is collecting data at the PEP-II asymmetric e{sup +}e{sup -} collider (E{sub e{sup -}} = 9.0 GeV; E{sub e{sup +}} = 3.1 GeV), a high-luminosity accelerator machine (L = 3 x 10{sup 33} cm{sup -2}s{sup -1}). The center-of-mass energy (10.58 GeV) of the e{sup +}e{sup -} system at PEP-II allows resonant production of the {Upsilon}(4S), a b{bar b} bound state, which decays almost exclusively in a B{sup 0}{bar B}{sup 0} or a B{sup +}B{sup -} pair. A high-acceptance detector, projected and built by a wide international collaboration, detects and characterizes the decay products of the B mesons. From the analysis of the data collected during the first two years of operation, the BABAR collaboration has established CP-violation in decays of neutral B mesons at the 4.1{sigma} level. Besides the primary goal of CP-violation studies, the high luminosity of PEP-II, coupled with the high acceptance of the BABAR detector, allows competitive studies of the properties of a wide set of B decay modes. In particular, measurements of non-leptonic decays are extremely useful to understand the dynamics of the non-perturbative strong interactions involved in these processes. In this thesis a study of the non-leptonic decay mode B{sup {+-}} {yields} J/{psi}{pi}{sup {+-}} is presented.
Book Synopsis More on Direct CP Violation in B --> DJ/[psi] Decays by : João M. Soares
Download or read book More on Direct CP Violation in B --> DJ/[psi] Decays written by João M. Soares and published by . This book was released on 1994 with total page 5 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Direct CP Violation in B --> DJ/[psi] Decays by : Isard Dunietz
Download or read book Direct CP Violation in B --> DJ/[psi] Decays written by Isard Dunietz and published by . This book was released on 1993 with total page 4 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Probing the Symmetry of Nature. (CP Violation in B-J [over Psi K Sub L] Decays) by : Kirill Korotushenko
Download or read book Probing the Symmetry of Nature. (CP Violation in B-J [over Psi K Sub L] Decays) written by Kirill Korotushenko and published by . This book was released on 2004 with total page 374 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis A Search for Direct CP Violation in K[+-]-->[pi+-][pi+-][pi+-] Decays by : Woon-Seng Choong
Download or read book A Search for Direct CP Violation in K[+-]-->[pi+-][pi+-][pi+-] Decays written by Woon-Seng Choong and published by . This book was released on 2000 with total page 338 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Observation of Direct CP Violation in Ks,l [right Arrow] [pi] [pi] Decays by : Peter S. Shawhan
Download or read book Observation of Direct CP Violation in Ks,l [right Arrow] [pi] [pi] Decays written by Peter S. Shawhan and published by . This book was released on 1999 with total page 350 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis CP Violation in the Decays B Sup 0 Yields. Psi. K Sub S and B Sup 0 Yields. Pi. Sup +. Pi. Sup Minus by :
Download or read book CP Violation in the Decays B Sup 0 Yields. Psi. K Sub S and B Sup 0 Yields. Pi. Sup +. Pi. Sup Minus written by and published by . This book was released on 1992 with total page 15 pages. Available in PDF, EPUB and Kindle. Book excerpt: We point out the strong correlation between the CP-violating asymmetries in the decays B{sup o} →?K{sub s} and B{sup o} →??− that is predicted by the Kobayashi-Maskawa model. This results in a very restricted allowed region for the asymmetries, and so their measurement will provide a powerful test of the standard model. To show how new physics may give very different results, we look at the predictions of a simple model where both the standard model and superweak contributions to the K{sup o} and B{sup o} mass matrices coexist. We find that, for possible values of the parameters, practically any values are allowed for the asymmetries.
Book Synopsis A Search for Direct CP Violation in the Decay K[L,S] [right Arrow] [pi]+[pi]−[gamma] by : Michael Christopher Ronquest
Download or read book A Search for Direct CP Violation in the Decay K[L,S] [right Arrow] [pi]+[pi]−[gamma] written by Michael Christopher Ronquest and published by . This book was released on 2008 with total page 710 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Measurement of Direct CP Violation in B 2!sc$\bar{c}$ and B 2!d$\barc{c}$ Quark Transitions Using B+ 2!J/psiK+ and B+2!J/[Psi][pi]+ Decays by :
Download or read book Measurement of Direct CP Violation in B 2!sc$\bar{c}$ and B 2!d$\barc{c}$ Quark Transitions Using B+ 2!J/psiK+ and B+2!J/[Psi][pi]+ Decays written by and published by . This book was released on 2008 with total page 154 pages. Available in PDF, EPUB and Kindle. Book excerpt: This thesis describes the measurement of the direct CP violation in the b → sc$\bar{c}$ transition using the decay B+ → J/[Psi]K+, and in the b → dc$\bar{c}$ transition using the decay B+ → J/[Psi][pi]+. The decays of B+ mesons are reconstructed in approximately 2.8 fb-1 of data recorded by D0 detector in 2002-2007 during Run II of Fermilab Tevatron collider. Using the unbinned likelihood fit, a signal of 40,222 ± 242 of B+ → J/[Psi]K+ and 1,578 ± 119 of B+ → J/[Psi][pi]+ events is obtained. The corresponding direct CP violation asymmetries are measured to be ACP(B+ → J/[Psi](1S)K+) = +0.0077 ± 0.0061(stat.) ± 0.0027(syst.), and ACP(B+ → J/[Psi](1S)[pi]+) = - 0.089 ± 0.081(stat.) ± 0.028(syst.). The result on ACP (B+ → J/[Psi](1S)K+) is consistent with the 2007 world average and is the most precise measurement of this asymmetry, with uncertainty approaching the level of the Standard Model prediction. The result on ACP (B+ → J/[Psi](1S)[pi]+) constitutes the first measurement of this asymmetry at the hadron collider, with uncertainty at the level of the 2007 world average. The measurement presented in this thesis has become possible due to the sophisticated online and offline tracking/vertexing implemented at D0, and the regular reversal of the polarities of the D0 detector magnets.
Book Synopsis Observation of Direct CP Violation in B[sup 0] --] K[sup +]pi[sup -] Decays by :
Download or read book Observation of Direct CP Violation in B[sup 0] --] K[sup +]pi[sup -] Decays written by and published by . This book was released on 2004 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The authors present an updated search for direct CP violation in the decay B[sup 0] --> K[sup +]pi[sup -]. Using 227 million [Upsilon](4S) --> B[bar B] decays collected with the BaBar detector at the PEP-II asymmetric-energy E[sup +]e[sup -] collider at SLAC, the authors observe a total signal yield of n(K-pi[sup +]) + n(K[sup +]pi[sup -]) = 1606 [+-] 51 decays and measure the asymmetry [n(K[sup -]pi[sup +])-n(K[sup +]pi[sup -])]/[n(K[sup -]pi[sup +])+n(K[sup +]pi[sup -])] = 0.133 [+-] 0.030(stat) [+-] 0.009(syst). This measurement establishes direct CP violation in the B[sup 0] meson system at the level of 4.2 standard deviations.
Book Synopsis Study of CP Violation in B0s 2!J/[Psi][Phi] Decays at by :
Download or read book Study of CP Violation in B0s 2!J/[Psi][Phi] Decays at written by and published by . This book was released on 2008 with total page 143 pages. Available in PDF, EPUB and Kindle. Book excerpt: In a universe dominated by matter, the source of CP violation may explain one of the greatest mysteries in particle physics: what happened to the antimatter? The Standard Model successfully describes CP violation in the B+ and Bd0 systems, yet insufficiently accounts for the observed matter-antimatter asymmetry. The Standard Model predicts a small value of CP violation in the Bs0 meson system, which has only recently been experimentally tested. A measurement of large, anomalous CP violation in the Bs0 system would be a clear indication of new physics sources beyond the Standard Model. This dissertation describes a study of CP violation in approximately 2000 Bs0 → J/[Psi][Phi] decays reconstructed in a 2.8 fb-1 data sample collected by the D0 Run II detector at Fermi National Accelerator Laboratory in Batavia, Illinois. This data was provided by p$\bar{p}$ collisions at √s = 1.96 TeV delivered by the Tevatron accelerator between April 2002 and August 2007. Flavor-tagged Bs0 → J/[Psi]([mu]+[mu]-)[Phi](K+K-) decays and an angular analysis are used to study the time evolution of the final state angular distributions. From this analysis, we measure the width difference between the heavy and light mass eigenstates, BsL and BsH , to be [Delta][Gamma]s = 0.19 ± 0.07 and the CP-violating phase [Phi]s = -0.57-0.30+0.24.
Book Synopsis Observation of Direct CP Violation in B° --] Kpi− Decays by :
Download or read book Observation of Direct CP Violation in B° --] Kpi− Decays written by and published by . This book was released on 2004 with total page 5 pages. Available in PDF, EPUB and Kindle. Book excerpt: The authors present an updated search for direct CP violation in the decay B° --> Kpi−. Using 227 million [Upsilon](4S) --> B{bar B} decays collected with the BaBar detector at the PEP-II asymmetric-energy Ee− collider at SLAC, the authors observe a total signal yield of n(K-pi+) + n(K+pi−) = 1606 ± 51 decays and measure the asymmetry [n(K−pi+)-n(K+pi−)]/[n(K−pi+)+n(K+pi−)] = 0.133 ± 0.030(stat) ± 0.009(syst). This measurement establishes direct CP violation in the B° meson system at the level of 4.2 standard deviations.
Download or read book Cp Violation written by Cecilia Jarlskog and published by World Scientific. This book was released on 1989-01-01 with total page 733 pages. Available in PDF, EPUB and Kindle. Book excerpt: Contents:CP Phenomenology:Introduction to CP Violation (C Jarlskog)CP-Violation in the K0-K0-System (K Kleinknecht)The Quark Mixing Matrix, Charm Decays and B Decays (S Stone)The Question of CP Noninvariance — As Seen through the Eyes of Neutral Beauty (I I Bigi et al.)In Search of CP Noninvariance in Heavy Quark Systems (L-L Chau)CP Violation at High Energy e+e- Colliders (J Bernabéu & M B Gavela)CP Violation in the Standard Model with Four Families (A Datta & E A Paschos)CP Effects When Neutrinos are their Own Antiparticles (B Kayser)On Spontaneous CP Violation Triggered by Scalar Bosons (I I Bigi & A I Sanda)CP Violation and Left-Right Symmetry (R N Mohapatra)CP Violation and Supersymmetry (R N Mohapatra)Electric Dipole Moments (S M Barr & W H Marciano)Special Topics: The Strong CP Problem (R D Peccei)CP Violation and Cosmology (P Langacker)Nonleptonic Interactions:The 1/N Approach to Nonleptonic Weak Interactions (A J Buras)Chiral Perturbation Theory Approach to Weak Amplitudes (E de Rafael)What We Learnt from Weak Decays of Heavy Quarks (B Stech)Weak Hamiltonian on the Lattice (G Martinelli) Readership: High energy physicists. Keywords:CP Violation;Quark Mixing Matrix;Charm Decays;B Decays;Nonleptic Interactions;Heavy QuarksReview: “Similar material is most often available in journals, but the book accomplishes a valuable service in drawing it together … the one that will probably have the greatest utility and longest lifespan is the survey of B meson physics by I Bigi, V Khoze, N Uraltsev and A Sanda … Bigi et al. here provide the most thorough and readable account of the issues that I know of. I have seen no review comparable to the excellent summary of electric dipole moments by S Barr and W Marciano … the volume offers a generally readable entry into this field for a reader who has a basic background in particle physics.” John F Donoghue Science “… this book performs a very useful service for anyone active or interested in CP violation, both as a source of primary information and as a work of reference.” K J Peach J Phys. G: Nucl. Part. Phys.
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