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Determination Of The B Quark Mass And Nonperturbative Parameters In Semileptonic And Radiative Penguin Decays At Babar
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Book Synopsis Determination of the B-quark Mass and Nonperturbative Parameters in Semileptonic and Radiative Penguin Decays at BaBar by :
Download or read book Determination of the B-quark Mass and Nonperturbative Parameters in Semileptonic and Radiative Penguin Decays at BaBar written by and published by . This book was released on 2008 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Knowing the mass of the b-quark is essential to the study of the structure and decays of B mesons as well as to future tests of the Higgs mechanism of mass generation. We present recent preliminary measurements of the b-quark mass and related nonperturbative parameters from moments of kinematic distributions in charmed and charmless semileptonic and radiative penguin B decays. Their determination from charmless semileptonic B decays is the first measurement in this mode. The data were collected by the BABAR detector at the PEP-II asymmetric-energy ee−-collider at the Stanford Linear Accelerator Center at a center-of-momentum energy of 10:58 GeV.
Book Synopsis Measurement of the Hadronic Mass Spectrum in B to Xulnu Decaysand Determination of the B-Quark Mass at the BaBar Experiment by :
Download or read book Measurement of the Hadronic Mass Spectrum in B to Xulnu Decaysand Determination of the B-Quark Mass at the BaBar Experiment written by and published by . This book was released on 2008 with total page 145 pages. Available in PDF, EPUB and Kindle. Book excerpt: I present preliminary results of the measurement of the hadronic mass spectrum and its first three spectral moments in inclusive charmless semileptonic B-meson decays. The truncated hadronic mass moments are used for the first determination of the b-quark mass and the nonperturbative parameters [mu][pi]2 and [rho]D3 in this B-meson decay channel. The study is based on 383 x 106 B$\bar{B}$ decays collected with the BABAR experiment at the PEP-II e+e- storage rings, located at the Stanford Linear Accelerator Center. The first, second central, and third central hadronic mass moment with a cut on the hadronic mass mX2 6.4GeV2 and the lepton momentum p* 1 GeV are measured to be: M1 = (1.96 ± 0.34stat ± 0.53syst) GeV2; U2 = (1.92 ± 0.59stat ± 0.87syst) GeV4; and U3 = (1.79 ± 0.62stat ± 0.78syst) GeV6; with correlation coefficients [rho]12 = 0.99, [rho]23 = 0.94, and [rho]13 = 0.88, respectively. Using Heavy Quark Effective Theory-based predictions in the kinetic scheme we extract: mb = (4.60 ± 0.13stat ± 0.19syst ± 0.10theo GeV); [mu][pi]2 = (0.40 ± 0.14stat ± 0.20syst ± 0.04theo) GeV2; [rho]D3 = (0.10 ± 0.02stat ± 0.02syst ± 0.07theo) GeV3; at [mu] = 1 GeV, with correlation coefficients [rho]mb[mu][pi]2 = -0.99, [rho] [mu][pi]2[rho]D3 = 0.57, and [rho]mb[rho]D3 = -0.59. The results are in good agreement with earlier determinations in inclusive charmed semileptonic and radiative penguin B-meson decays and have a similar accuracy. Through the comparison of this result to those obtained in other channels, this provides a test of the Heavy Quark Effective Theory predictions that are used for the determination of.
Book Synopsis Measurement of the Hadronic Mass Spectrum in B[right Arrow]X[subscript U]l[nu] Decays and Determination of the B-quark Mass at the BABAR Experiment by : Kerstin Tackmann
Download or read book Measurement of the Hadronic Mass Spectrum in B[right Arrow]X[subscript U]l[nu] Decays and Determination of the B-quark Mass at the BABAR Experiment written by Kerstin Tackmann and published by . This book was released on 2008 with total page 300 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis B Decays (Revised 2nd Edition) by : Sheldon Stone
Download or read book B Decays (Revised 2nd Edition) written by Sheldon Stone and published by World Scientific. This book was released on 1994-08-01 with total page 673 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.
Book Synopsis Heavy Quark Physics by : Aneesh V. Manohar
Download or read book Heavy Quark Physics written by Aneesh V. Manohar and published by Cambridge University Press. This book was released on 2023-07-31 with total page 205 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Particles and Nuclei by : Peter D. Barnes
Download or read book Particles and Nuclei written by Peter D. Barnes and published by AIP Conference Proceedings / H. This book was released on 2006-10-04 with total page 1216 pages. Available in PDF, EPUB and Kindle. Book excerpt: This is the proceedings of the 17th International Conference on Particles and Nuclei, Santa Fe, New Mexico, USA which was concerned with new developments in experimental and theoretical particle physics, nuclear physics, and cosmology, and the intersections of these fields which will help us understand our Universe more completely. The participants reported on new developments in instrumentation, including large-scale facilities, such as accelerators, that will be essential for future work.
Book Synopsis Inclusive Semileptonic B Decays at BABAR and Extraction of HQE Parameters by :
Download or read book Inclusive Semileptonic B Decays at BABAR and Extraction of HQE Parameters written by and published by . This book was released on 2004 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: A measurement of the first four moments of the hadronic mass distribution in B [yields] C[sub c][ell][bar [nu]] decays is presented for minimum lepton momenta varying between 0.9 and 1.6 GeV, using data recorded with the BABAR detector. Furthermore, a measurement of the inclusive electron energy spectrum for semileptonic B decays together with a measurement of its first, second and third moments for minimum electron energies between 0.6 and 1.5 GeV is reported. We determine the inclusive B [yields] X[sub c][ell][bar [nu]] branching fraction, [Beta][sub c[ell][nu]], the CKM matrix element V[sub cb], and other heavy-quark parameters from a simultaneous fit to the measured moments.
Download or read book B Decays written by Sheldon Stone and published by World Scientific. This book was released on 1992 with total page 502 pages. Available in PDF, EPUB and Kindle. Book excerpt: The study of b quarks has now reached a stage where it is useful to review what has been learned so far and also to look at the implications of future studies. The most important observations thus far measurement of the B lifetime, B0 B0 mixing, and the observation of b? u transitions, as well as more mundane results on hadronic and semileptonic transitions are described in detail by experimentalists who have been closely involved with the measurements. Theoretical progress in understanding b quark decays, including the mechanisms of hadronic and semileptonic decays, are described. Synthesizing the experimental and theoretical information, the authors discuss tests of the standard model and measurements of standard model parameters. Possibilities of more extensive tests using measurement of CP violation in the B system are also addressed.
Book Synopsis Inclusive Semileptonic B Decays at BABAR. by :
Download or read book Inclusive Semileptonic B Decays at BABAR. 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 report updates on two analyses of inclusive semileptonic B decays based on a dataset of 89 million B[bar B] events recorded with the BABAR detector at the [Upsilon](4S) resonance. Events are selected by fully reconstructing the decay of one B meson and identifying a charged lepton from the decay of the other [bar B] meson. IN the first analysis, the measurement of the first and second moment of the hadronic mass distribution in Cabibbo-favored [bar B] [yields] X[sub c][ell][bar [nu]] decays allows for the determination of the nonperturbative parameters [bar [Lambda]] and [lambda][sub 1] of Heavy Quark Effective Theory (HQET) and V[sub cb]. In the second analysis, the hadronic mass distribution is used to measure the inclusive charmless semileptonic branching fraction and to determine V[sub ub].
Book Synopsis Radiative Penguin Decays at the BaBar Experiment B to K*gamma, B to Rho Gamma, B to Omega Gamma and B to X_s Gamma by : E. Grauges
Download or read book Radiative Penguin Decays at the BaBar Experiment B to K*gamma, B to Rho Gamma, B to Omega Gamma and B to X_s Gamma written by E. Grauges and published by . This book was released on 2004 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: A review of the results obtained from the analysis of the B meson decays that involve Radiative Penguin processes, recorded at the BaBar experiment at the Stanford Linear Accelerator Center PEP-II B-Factory, is presented. The physics interest of these processes and their SM prediction are discussed briefly. The most relevant selection techniques used in the analysis are described before quoting the latest results made public by the BaBar collaboration as of July 2003.
Book Synopsis Measurement of CP Violation Parameters in B Quark Decays to Charm Anticharm Down Quarks, Exclusive Decays at the BABAR Experiment by :
Download or read book Measurement of CP Violation Parameters in B Quark Decays to Charm Anticharm Down Quarks, Exclusive Decays at the BABAR Experiment written by and published by . This book was released on 2003 with total page 5 pages. Available in PDF, EPUB and Kindle. Book excerpt: The BABAR experiment at SLAC provides an opportunity for measurement of CP violation in B decays. A measurement of time-dependent CP violating asymmetries using exclusive B meson decays where the b quark decays to c{bar c}d (including B° 2!D*D*− and B° 2!D*{sup ±}D{sup {-+}} decays) is presented here. This is the first measurement of CP violation in a mode sensitive to the Unitarity Triangle parameter sin2[beta] outside of decays containing charmonium. It provides a comparison to measurements of sin2[beta] using b 2!c{bar c}s, and permits an observation into potential new physics sources of CP violation, such as supersymmetry, via differences between these measurements and those of B° 2!J/[psi] K{sub S}° as statistics of reconstructed neutral B decays to D{sup (*)+} D{sup (*)-} increase. The measured value of the time-dependent CP violating asymmetries are: S = 0.38 ± 0.88(stat) ± 0.12(syst) and C = -0.30 ± 0.50(stat) ± 0.13(syst) for B° 2!D*− D; S = -0.43 ± 1.41(stat) ± 0.23(syst) and C = 0.53 ± 0.74(stat) ± 0.15(syst) for B° 2!D*+ D−; and S = -0.05 ± 0.45(stat) ± 0.05(syst) and C = 0.12 ± 0.30(stat) {+-} 0.05(syst) for B° 2!D*− D+; where S corresponds to CP violation in the interference of mixing and decay and C corresponds to CP violation in decay.
Book Synopsis Testing the Standard Model with Radiative Penguin Decays at BaBar by :
Download or read book Testing the Standard Model with Radiative Penguin Decays at BaBar written by and published by . This book was released on 2008 with total page 5 pages. Available in PDF, EPUB and Kindle. Book excerpt: The author discusses two recent results in b → s[gamma] decays from BABAR. The first is a measurement of the branching fraction and photon energy spectrum in the B meson frame of the decay B → X{sub s[gamma]}. The second result probes the photon polarization via time-dependent CP violation in neutral B decays to K*°{gamma}.
Download or read book "Henri IV" de Luigi Pirandelo written by and published by . This book was released on 1950 with total page 53 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Semi-inclusive Measurement of [bottom Quark Decaying to Downquark-gamma] at BABAR with Runs 1-5 Data by : Timothy Beck
Download or read book Semi-inclusive Measurement of [bottom Quark Decaying to Downquark-gamma] at BABAR with Runs 1-5 Data written by Timothy Beck and published by . This book was released on 2008 with total page 318 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Measurement of Exclusive Electromagnetic Penguin Decays of the B Meson by : Christopher Duncan Jones
Download or read book Measurement of Exclusive Electromagnetic Penguin Decays of the B Meson written by Christopher Duncan Jones and published by . This book was released on 1996 with total page 454 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Measurement of Inclusive Radiative B -Meson Decay B -] X_s Gamma by :
Download or read book Measurement of Inclusive Radiative B -Meson Decay B -] X_s Gamma written by and published by . This book was released on 2006 with total page 206 pages. Available in PDF, EPUB and Kindle. Book excerpt: Radiative decays of the B meson, B 2!X{sub s}[gamma], proceed via virtual flavor changing neutral current processes that are sensitive to contributions from high mass scales, either within the Standard Model of electroweak interactions or beyond. In the Standard Model, these transitions are sensitive to the weak interactions of the top quark, and relatively robust predictions of the inclusive decay rate exist. Significant deviation from these predictions could be interpreted as indications for processes not included in the minimal Standard Model, like interactions of charged Higgs or SUSY particles. The analysis of the inclusive photon spectrum from B 2!X{sub s}[gamma] decays is rather challenging due to high backgrounds from photons emitted in the decay of mesons in B decays as well as ee− annihilation to low mass quark and lepton pairs. Based on 88.5 million B{bar B} events collected by the BABAR detector, the photon spectrum above 1.9 GeV is presented. By comparison of the first and second moments of the photon spectrum with QCD predictions (calculated in the kinetic scheme), QCD parameters describing the bound state of the b quark in the B meson are extracted: m{sub b} = (4.45 ± 0.16) GeV/c2; [mu]{sub {pi}}2 = (0.65 ± 0.29) GeV2. These parameters are useful input to non-perturbative QCD corrections to the semileptonic B decay rate and the determination of the CKM parameter.
Book Synopsis Radiative Penguin Decays of B Mesons by :
Download or read book Radiative Penguin Decays of B Mesons written by and published by . This book was released on 2005 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Electromagnetic radiative penguin decays of the B meson were studied with the BaBar detector at SLAC's PEP-II asymmetric-energy B Factory. Branching fractions and isospin asymmetry of the decay B → K*[gamma], branching fractions of B → K*2(1430)[gamma], and a search for B° → [phi][gamma] are presented. The decay rates may be enhanced by contributions from non-standard model processes.
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