Search For Cp Violation In B Pi H Decays And B Rho H Decays With Babar Experiment
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Gautschlieder
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Author :
language : en
Publisher:
Release Date : 1922
Gautschlieder written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1922 with categories.
Search For Cp Violation In B Pi H Decays And B Rho H Decays With Babar Experiment
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Author : C. Yeche
language : en
Publisher:
Release Date : 2003
Search For Cp Violation In B Pi H Decays And B Rho H Decays With Babar Experiment written by C. Yeche and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2003 with categories.
The authors present BABAR experiment studies to observe CP violation in the two-body decays ({pi}K and {pi}{pi}) and the quasi two-body decays ({rho}K and {rho}{pi}) of B mesons. The results are obtained from data samples of about 89(123) million {Upsilon}(4S) {yields} B{bar B} decays collected between 1999 and 2002(2003) with the BABAR detector at the PEP-II asymmetric-energy B Factory at SLAC.
Rare B Decays And Direct Cp Violation At Babar
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Author :
language : en
Publisher:
Release Date : 2003
Rare B Decays And Direct Cp Violation At Babar written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2003 with categories.
The search for rare B decays and direct CF violation at BABAR is described. The following measurements (based on integrated luminosities ranging from 56.4 to 81.9 fb[sup -1]) are summarized: the inclusive branching fractions and direct CF asymmetries of B[sup+][yields] h[sup+]h[sup -]H[sup+] (h=[pi], K), the exclusive branching fractions of B[sup+][yields] K[sup+][pi][sup -][pi][sup+] (where significant signals are observed in the B[sup+][yields] K*[sup 0](892)[pi][sup+], B[sup+][yields] f[sub 0](98)K[sup+], B[sup+][yields][chi][sub c0]K[sup+], B[sup+][yields][bar D][sup 0][pi][sup+] and B[sup+][yields] higher K*[sup 0][pi][sup+] channels), the branching fractions of B[sup+][yields][rho][sup 0][rho][sup+] and B[sup+][yields][rho][sup 0] K*[sup+], and finally, the branching fractions, the longitudinal components, and the direct CF asymmetries in B[yields][phi]K*.
Searches For New Physics In Cp Violation From Babar
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language : en
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Release Date : 2015
Searches For New Physics In Cp Violation From Babar written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2015 with categories.
Results of recent searches for new physics in CP violation in charm decays from the BABAR experiment are presented. These results include a measurement of D0 - anti D0 mixing and searches for CP violation in two-body D0 decays, a search for CP violation in the charm decays D" 2!KS0K " and D s" 2!KS0K", KS0[pi]", and a search for direct CP violation in the singly-Cabibbo suppressed D" 2!K+K-[pi]"decays. These studies are based on the fi nal dataset collected by BABAR at the PEP-II B factory at SLAC in the period 1999-2008. No evidence of CP violation is found in these charm decays. The measured mixing parameter yCP = [0.72 " 0.18(stat) " 0.12(syst)]% excludes the no-mixing null hypothesis with a signifi cance of 3.3[sigma].
Babar Explores Cp Violation
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Author :
language : en
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Release Date : 2003
Babar Explores Cp Violation written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2003 with categories.
The most recent results obtained by the BABAR experiment at the PEP-II asymmetric-energy B Factory at SLAC on CP-violating asymmetries and branching fractions for neutral and charged B decays are presented here. The analysis was performed on a data sample of[approx] 88 million[Upsilon](4S)[yields] B[bar B] decays collected between 1999 and 2002. Using b[yields] c[bar c]s decays, we measure sin2[beta]= 0.741[+-] 0.067(stat)[+-] 0.034(syst). We also present sin2[beta] measurements from, b[yields] s[bar s]s and b[yields] c[bar c]d processes. From neutral B meson decays to two-body final states of charged pions and kaons, we derive for the CP violating parameters, S[sub[pi][pi]]= 0.02[+-] 0.34[+-] 0.05[-0.54,+0.58] and C[sub[pi][pi]]= -0.30[+-] 0.25[+-] 0.04[-0.72,+0.12]. First results for B[yields][pi][sup+][pi][sup -][pi][sup 0] and K[sup[+-]][pi][sup[-+]][pi][sup 0] final states dominated by the[rho][sup[+-]] resonance, are also presented.
Measurement Of The Branching Fraction And Search For Direct Cp Violation In The B J Psi Pi Decay Mode At Babar
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Author : Francesco Fobozzi
language : en
Publisher:
Release Date : 2006
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 has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2006 with categories.
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.
Cp Violation In B Decays And The Babar Experiment
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Author :
language : en
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Release Date : 2001
Cp Violation In B Decays And The Babar Experiment written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2001 with categories.
During the first year of data taking, the 1999-2000 run, the BABAR detector at the SLAC PEP-II asymmetric collider has collected an integrated luminosity of 20.7 fb−1 corresponding to 22.7 million B{bar B} pairs at the [Upsilon](4S) resonance. Using this data, we present the measurement of sin2[beta] based on samples of B° → J/[psi] K{sub S}°, B° → [psi](2S) K{sub S}° and B° → J/[psi] K{sub L}° L decays. Our measured value is sin2[beta] = 0.34 ± 0.20 (stat) ± 0.05 (syst). In addition we report on the measurement of branching fractions for exclusive B decays to charmonium final states, measurements of charged and neutral B meson lifetimes and also the B°{bar B}° oscillation frequency.
Deutsche Grundkarte
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Author :
language : en
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Release Date : 1989
Deutsche Grundkarte written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1989 with categories.
Search For Cp Violation In B0
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Author :
language : en
Publisher:
Release Date : 2003
Search For Cp Violation In B0 written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2003 with categories.
We present preliminary measurements of direct and indirect CP-violating asymmetries in the decays of neutral B mesons to[pi][sup+][pi][sup -][pi][sup 0] and K[sup[+-]][pi][sup[-+]][pi][sup 0] final states dominated by the[rho][sup[+-]] resonance, using a time-dependent maximum likelihood analysis. The data sample comprises 88 x 10[sup 6][Upsilon](4S)[yields] B[bar B] decays (80.8 fb[sup -1]) collected with the BABAR detector at the PEP-II asymmetric-energy B Factory at SLAC.
Search For Cp Violation In Tau Decays At Babar
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Author : Hervé Hiu Fai Choi
language : en
Publisher:
Release Date : 2011
Search For Cp Violation In Tau Decays At Babar written by Hervé Hiu Fai Choi and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2011 with categories.
According to the Big Bang Theory, matter and antimatter were produced in equal amounts at the beginning. Over time the antimatter disappeared, leaving galactic struc- tures composed only of matter. Therefore, there is some process in nature that proceeds at different rates for matter and antimatter due to the violation of the CP symmetry. CP violation has been observed in strange and bottom quark meson decays. However, a direct CP violation is predicted in the? lepton sector. Specifically, the charge asymmetry due to CP violation in the decay?????K0S (? 0?0)?? is predicted to be (+0.33 ± 0.01)%. In this work the charge asymmetry of the decay?????K0S (? 0?0) v? is measured using a dataset of 437 million? lepton pairs collected by the BABAR experiment at the SLAC National Accelerator Laboratory. The charge asymmetry induced by CP violation is found to be A = ( -0.45 ± 0.24 ± 0.11) %, consistent with prediction.