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Measurement Of Direct Cp Asymmetries In Charmless Hadronic B Decays
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Book Synopsis Measurement of Direct CP Asymmetries in Charmless Hadronic B Decays by : Emanuele Di Marco
Download or read book Measurement of Direct CP Asymmetries in Charmless Hadronic B Decays written by Emanuele Di Marco and published by . This book was released on 2006 with total page 7 pages. Available in PDF, EPUB and Kindle. Book excerpt: We present recent results on time integrated and time dependent CP violation for charmless hadronic B decays using BABAR detector at the PEP-II B-factory.
Download or read book רפליקציה של בקטריופאג' P1 written by and published by . This book was released on 1987 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Brief discours sur aucunes actions des Estats Généraulx des Pays-Bas, à sçavoir, sur le faict de la négociation de paix, après la surprise du chasteau & ville de Namur, l'entretiennement de la pacification de Gand, la puissante armée by :
Download or read book Brief discours sur aucunes actions des Estats Généraulx des Pays-Bas, à sçavoir, sur le faict de la négociation de paix, après la surprise du chasteau & ville de Namur, l'entretiennement de la pacification de Gand, la puissante armée written by and published by . This book was released on 1579 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis CP-Violating Asymmetries in Eta-prime K and Direct CP Violation Searches with BABAR in Charmless Hadronic B Meson Decays by :
Download or read book CP-Violating Asymmetries in Eta-prime K and Direct CP Violation Searches with BABAR in Charmless Hadronic B Meson Decays written by and published by . This book was released on 2004 with total page 7 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Measurements of Branching Fractions and CP Asymmetries in Charmless Hadronic Two-body Neutral-B Meson Decays by : 吳姿瑩
Download or read book Measurements of Branching Fractions and CP Asymmetries in Charmless Hadronic Two-body Neutral-B Meson Decays written by 吳姿瑩 and published by . This book was released on 2011 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Measurements of Direct CP Violating Asymmetries in Charmless Decays of Strange Bottom Mesons and Bottom Baryons by :
Download or read book Measurements of Direct CP Violating Asymmetries in Charmless Decays of Strange Bottom Mesons and Bottom Baryons written by and published by . This book was released on 2011 with total page 7 pages. Available in PDF, EPUB and Kindle. Book excerpt: We report measurements of direct CP-violating asymmetries in charmless decays of neutral bottom hadrons to pairs of charged hadrons with the upgraded Collider Detector at the Fermilab Tevatron. Using a data sample corresponding to 1 fb−1 of integrated luminosity, we obtain the first measurements of direct CP violation in bottom strange mesons, A{sub CP}(B{sub s}° → K−?) = +0.39 ± 0.15 (stat) ± 0.08 (syst), and botton baryons, A{sub CP}(?{sub b}° → p?−) = + 0.03 ± 0.17 (stat) ± 0.05 (syst) and A{sub CP} (?{sub b}° → pK−) = +0.37 ± 0.17 (stat) ± 0.03 (syst). In addition, they measure CP violation in B° → K+?− decays with 3.5? significance, A{sub CP} (B° → K+?−) = -0.086 ± 0.023 (stat) ± 0.009 (syst), in agreement with the current world average. Measurements of branching fractions of B{sub s}° → K+K− and B° →?+?− decays are also updated.
Book Synopsis Measurement of the Branching Fractions and CP Violating Asymmetries of Charmless Hadronic B Decays -> K*pi at BaBar by : Nicole Isabelle Chevalier
Download or read book Measurement of the Branching Fractions and CP Violating Asymmetries of Charmless Hadronic B Decays -> K*pi at BaBar written by Nicole Isabelle Chevalier and published by . This book was released on 2002 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Direct CP Violatio in Charmless Hadronic B-meson Decays at the PEP-II Asymmetric B-meson Factory by : Alexandre Valerievich Telnov
Download or read book Direct CP Violatio in Charmless Hadronic B-meson Decays at the PEP-II Asymmetric B-meson Factory written by Alexandre Valerievich Telnov and published by . This book was released on 2003 with total page 446 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Measurement of the Branching Fractions and CP Violating Asymmetries of Charmless Hadronic B Decays B [to] K*[pi] at BaBar by :
Download or read book Measurement of the Branching Fractions and CP Violating Asymmetries of Charmless Hadronic B Decays B [to] K*[pi] at BaBar written by and published by . This book was released on 2002 with total page 294 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Branching Fractions and Direct CP Asymmetries of Charmless Decay Modes at the Tevatron by : Michael Morello
Download or read book Branching Fractions and Direct CP Asymmetries of Charmless Decay Modes at the Tevatron written by Michael Morello and published by . This book was released on 2006 with total page 6 pages. Available in PDF, EPUB and Kindle. Book excerpt: The authors present new CDF results on the branching fractions and time-integrated direct CP asymmetries for B{sup 0} and B{sub s}{sup 0} decay modes into pairs of charmless charged hadrons (pion or kaon). The data set for this update amounts to 1 fb{sup -1} of {bar p}p collisions at {radical}s = 1.96 TeV. They report the first observation of the B{sub s}{sup 0} {yields} K{sup -}{pi}{sup +} mode and a measurement of its branching fraction and direct CP asymmetry. They also observe for the first time two charmless decays of b-baryon: {Lambda}{sub b}{sup 0} {yields} p{pi}{sup -} and {Lambda}{sub b}{sup 0} {yields} pK{sup -}.
Book Synopsis Charmless Hadronic B Decays at Belle and BaBar by :
Download or read book Charmless Hadronic B Decays at Belle and BaBar written by and published by . This book was released on 2011 with total page 4 pages. Available in PDF, EPUB and Kindle. Book excerpt: I report on recent measurements from the Belle and BABAR collaborations on the decay of the B meson to hadronic final states without a charm quark. The study of the branching fractions and angular distributions of B meson decays to hadronic final states without a charm quark probes the dynamics of both the weak and strong interactions, and plays an important role in understanding CP Violation (CPV) in the quark sector. CP Violation at the B factories is described graphically by a triangle with sides formed from the CKM matrix elements V{sub qd}V*{sub qb} (q = u, c, t) and internal angles [alpha], [beta] [gamma] (or [phi]2, [phi]1, [phi]3). Discrepancies in the measured values of the sides and angles could be an indication of New Physics beyond the Standard Model (SM) due to enhanced branching fractions or modified CP asymmetries. The experimental measurements of branching fractions, CP asymmetries, polarization and phases (both weak and strong) can be compared to theoretical models based on, for example, QCD factorization, SU(3) symmetry and Lattice QCD.
Book Synopsis B Physics And Cp Violation: Proceedings Of The 2nd International Conference by : Thomas E Browder
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.
Book Synopsis Measurements of CP Asymmetries and Branching Fractions of Two-body Charmless Decays of B0 and B$0\atop{s}$ Mesons by :
Download or read book Measurements of CP Asymmetries and Branching Fractions of Two-body Charmless Decays of B0 and B$0\atop{s}$ Mesons written by and published by . This book was released on 2007 with total page 301 pages. Available in PDF, EPUB and Kindle. Book excerpt: The thesis is organized as follows: Chapter 1 describes the theoretical framework of non-leptonic B$0top{s}$ → H+h'- decays, with a simple overview of the CP violation mechanism within the Standard Model and of the most used phenomenological approaches in the evaluation of strong interaction contributions. The chapter contains also a review of the theoretical expectations and the current experimental measurements along with a discussion about the importance of studying such decays. Chapter 2 contains a general description of the Tevatron collider and of the CDF II detector. Chapter 3 is devoted to the description of the data sample used for the measurement and the method used in extracting the signal from the background. Particular attention is dedicated to the on-line trigger selection, which is crucial to collect a sample enriched in B$0top{s}$ → h+h'- decays. Chapter 4 shows how the information from kinematics and particle identification was used to achieve a statistical discrimination amongst modes to extract individual measurements. The available resolutions in mass or in particle identification are separately insufficient for an event-by-event separation of B$0top{s}$ → h+h'- modes. The choice of observables and the technique used to combine them is an important and innovative aspect of the analysis described in this thesis. Chapter 5 is devoted to the accurate determination of the invariant mass lineshape. This is a crucial ingredient for resolving overlapping mass peaks. This chapter details all resolution effects with particular attention at the tails due to the emission of low-energy photons from charged kaons and pions in the final state (FSR). For the first time the effect of FSR has been accurately accounted for in a CDF analysis. Chapter 6 describes how kinematic and PID information, discussed in chap. 4 and chap. 5 were combined in a maximum Likelihood fit to statistically determine the composition of the B$0top{s}$ → h+h'- sample. This kinematics-PID combined fit has been developed and performed for the first time at CDF in the analysis presented in this thesis and this methodology was later inherited by several other analyses. Chapter 7 is devoted to the study of the isolation variable, which is a crucial handle to enhance the signal-to-background ratio in the off-line selection. It exploits the property that the b-hadrons tend to carry a larger fraction of the transverse momentum of the particles produced in the fragmentation, with respect to lighter hadrons. Since the simulators do not accurately reproduce the fragmentation processes, this chapter is devoted to the study of the control data sample of B$0top{s}$ → J/?X decays to probe the characteristics of this variable. Chapter 8 describes an innovative procedure used to optimize the selection to minimize the statistical uncertainty on the quantities one wishes to measure. The procedure is based on the fit of composition described in chap. 6. Chapter 9 reports the results of the fit of composition described in chap. 6 and the cross-checks performed to verify the goodness of the fit of composition. In order to translate the parameters returned from the fit into physics measurements the relative efficiency corrections between the various decay modes need to be applied. Chapter 10 is devoted to the description of these corrections. Chapter 11 describes the measurement of the detector-induced charge asymmetry between positively and negatively charged kaons and pions, due to their different probability of strong interaction in the tracker material using the real data. This allows to extract the acceptance correction factor for the CP asymmetries measurement without any external inputs from the simulation, and to perform a powerful check of whole analysis. Chapter 12 describes the main sources of systematic uncertainties and the method used to evaluate the signifi...
Book Synopsis Charmless B-hadrons Decays at CDF. by :
Download or read book Charmless B-hadrons Decays at CDF. written by and published by . This book was released on 2008 with total page 4 pages. Available in PDF, EPUB and Kindle. Book excerpt: We present CDF results on the branching fractions and time-integrated direct CP asymmetries for Bd, Bs and Lb decay modes into pairs of charmless charged hadrons (pions, kaons and protons). The data-set for these measurements amounts to 1fb−1 of p{bar p} collisions at a center of mass energy 1.96TeV. We report on the first observation of the Bs->Kpi, Lb-ppi and Lb->pK decay modes and on the measurement of their branching fractions and direct CP asymmetries.
Book Synopsis Measurements of Direct CP-Violating Asymmetries in Charmless Decays of Bottom Baryons by :
Download or read book Measurements of Direct CP-Violating Asymmetries in Charmless Decays of Bottom Baryons written by and published by . This book was released on 2014 with total page 8 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Studies of CP-Violation in Charmless Three-Body b-Hadron Decays by : Daniel O'Hanlon
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.
Book Synopsis Measurements of CP Asymmetries and Branching Fractions of Two-body Charmless Decays of B^0 and B^0_s Mesons by :
Download or read book Measurements of CP Asymmetries and Branching Fractions of Two-body Charmless Decays of B^0 and B^0_s Mesons written by and published by . This book was released on 2007 with total page 301 pages. Available in PDF, EPUB and Kindle. Book excerpt: The thesis is organized as follows: Chapter 1 describes the theoretical framework of non-leptonic B$0\atop{s}$ → H+h'- decays, with a simple overview of the CP violation mechanism within the Standard Model and of the most used phenomenological approaches in the evaluation of strong interaction contributions. The chapter contains also a review of the theoretical expectations and the current experimental measurements along with a discussion about the importance of studying such decays. Chapter 2 contains a general description of the Tevatron collider and of the CDF II detector. Chapter 3 is devoted to the description of the data sample used for the measurement and the method used in extracting the signal from the background. Particular attention is dedicated to the on-line trigger selection, which is crucial to collect a sample enriched in B$0\atop{s}$ → h+h'- decays. Chapter 4 shows how the information from kinematics and particle identification was used to achieve a statistical discrimination amongst modes to extract individual measurements. The available resolutions in mass or in particle identification are separately insufficient for an event-by-event separation of B$0\atop{s}$ → h+h'- modes. The choice of observables and the technique used to combine them is an important and innovative aspect of the analysis described in this thesis. Chapter 5 is devoted to the accurate determination of the invariant mass lineshape. This is a crucial ingredient for resolving overlapping mass peaks. This chapter details all resolution effects with particular attention at the tails due to the emission of low-energy photons from charged kaons and pions in the final state (FSR). For the first time the effect of FSR has been accurately accounted for in a CDF analysis. Chapter 6 describes how kinematic and PID information, discussed in chap. 4 and chap. 5 were combined in a maximum Likelihood fit to statistically determine the composition of the B$0\atop{s}$ → h+h'- sample. This kinematics-PID combined fit has been developed and performed for the first time at CDF in the analysis presented in this thesis and this methodology was later inherited by several other analyses. Chapter 7 is devoted to the study of the isolation variable, which is a crucial handle to enhance the signal-to-background ratio in the off-line selection. It exploits the property that the b-hadrons tend to carry a larger fraction of the transverse momentum of the particles produced in the fragmentation, with respect to lighter hadrons. Since the simulators do not accurately reproduce the fragmentation processes, this chapter is devoted to the study of the control data sample of B$0\atop{s}$ → J/[Psi]X decays to probe the characteristics of this variable. Chapter 8 describes an innovative procedure used to optimize the selection to minimize the statistical uncertainty on the quantities one wishes to measure. The procedure is based on the fit of composition described in chap. 6. Chapter 9 reports the results of the fit of composition described in chap. 6 and the cross-checks performed to verify the goodness of the fit of composition. In order to translate the parameters returned from the fit into physics measurements the relative efficiency corrections between the various decay modes need to be applied. Chapter 10 is devoted to the description of these corrections. Chapter 11 describes the measurement of the detector-induced charge asymmetry between positively and negatively charged kaons and pions, due to their different probability of strong interaction in the tracker material using the real data. This allows to extract the acceptance correction factor for the CP asymmetries measurement without any external inputs from the simulation, and to perform a powerful check of whole analysis. Chapter 12 describes the main sources of systematic uncertainties and the method used to evaluate the signifi...
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