Download or read book A Measurement of B0 Anti B0 Oscillations Using Fully reconstructed Hadronic B Decays at BaBar written by Benjamin Paul Brau and published by . This book was released on 2002 with total page 168 pages. Available in PDF, EPUB and Kindle. Book excerpt: Flavor oscillations of neutral B mesons have been studied with e+e- annihilation data collected at center of mass energies near the [gamma](4S) at the PEP-II asymmetric collider with the BABAR detector. One B0 is fully reconstructed in a hadronic decay to a flavor eigenstate. The flavor of the other B in the event is determined using an inclusive tagging algorithm which exploits the correlations between the flavor of the b quark and the charges of its decay products. By fitting the decay-time distribution of the observed mixed and unmixed final states, the oscillation frequency, [Delta]md, is determined to be 0.516 +/- 0.016 (stat.) +/- 0.010 (syst.) ps-l.

Download or read book A Measurement of B0 Anti B0 Oscillations Using Fully Reconstructed Hadronic 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: Flavor oscillations of neutral B mesons have been studied with e[sup +]e[sup -] annihilation data collected at center of mass energies near the [Upsilon](4S) at the PEP-II asymmetric collider with the BABAR detector. One B[sup 0] is fully reconstructed in a hadronic decay to a flavor eigenstate. The flavor of the other B in the event is determined using an inclusive tagging algorithm which exploits the correlations between the flavor of the b quark and the charges of its decay products. By fitting the decay-time distribution of the observed mixed and unmixed final states, the oscillation frequency, [Delta]m[sub d], is determined to be 0.516 [+-] 0.016(stat.) [+-] 0.010(syst.) ps[sup -1].

Download or read book Measurements of the B0 anti B0 Oscillation Frequency in Hadronic B Decays written by and published by . This book was released on 2001 with total page 5 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book A Measurement of BO Anti Bo Oscillations Using Fully Reconstructed Hadronic B Decays at BaBar written by Stanford Linear Accelerator Center and published by . This book was released on with total page 168 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Measurement of B0 anti B0 Flavor Oscillations in Hadronic B0 Decays written by and published by . This book was released on 2002 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Flavor oscillations of neutral B mesons have been studied in e[sup+]e[sup -] annihilation data collected with the BABAR detector at center-of-mass energies near the[Upsilon](4S) resonance. The data sample used for this purpose consists of events in which one B[sup 0] meson is reconstructed in a hadronic decay mode, while the flavor of the recoiling B[sup 0] is determined with a tagging algorithm that exploits the correlation between the flavor of the heavy quark and the charges of its decay products. From the time development of the observed mixed and unmixed final states we determine the B[sup 0]-[bar B][sup 0] oscillation frequency[Delta]m[sub d] to be 0.516[+-] 0.016(stat)[+-] 0.010(syst) ps[sup -1].

Download or read book Measurements of B0 and B Lifetimes and B0 anti B0 Mixing with Fully Reconstructed B Decays in BABAR written by and published by . This book was released on 2001 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Time-dependent B[sup 0][bar B][sup 0] flavor oscillations and B[sup 0] and B[sup+] lifetimes are studied in a sample of fully reconstructed B mesons collected with the BABAR detector, running at the PEP-II asymmetric e[sup+]e[sup -] B Factory with center-of-mass energies near the[Upsilon](4S) resonance. This is the first time that time-dependent mixing and lifetime measurements have been performed at[Upsilon](4S) energies.

Download or read book A Measurement of the CP Parameter Sin2 Using Fully Reconstructed B Cc Decays at the BaBar Experiment written by Eric Charles and published by . This book was released on 2002 with total page 304 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Measurement of the B0 anti B0 Oscillation Frequency with Inclusive Dilepton Events written by and published by . This book was released on 2002 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The B[sup 0]-[bar B][sup 0] oscillation frequency has been measured with a sample of 23 million B[bar B] pairs collected with the BABAR detector at the PEP-II asymmetric B Factory at SLAC. In this sample, we select events in which both B mesons decay semileptonically and use the charge of the leptons to identify the flavor of each B meson. A simultaneous fit to the decay time difference distributions for opposite- and same-sign dilepton events gives[Delta]m[sub d]= 0.493[+-] 0.012 (stat)[+-] 0.009 (syst) ps[sup -1].

Download or read book A SEARCH FOR TIME DEPENDENT B0 S ANTI B0 S OSCILLATIONS USING EXCLUSIVELY RECONSTRUCTED D S MESONS written by and published by . This book was released on 2003 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: A search for B[sub s][sup 0]-[bar B][sub s][sup 0] oscillations is performed using a sample of 400,000 hadronic Z[sup 0] decays collected by the SLD experiment. The B[sub s][sup 0] candidates are reconstructed in the B[sub s][sup 0][yields] D[sub s][sup -] X channel with D[sub s][sup -][yields][phi][pi][sup -], K*[sup 0] K[sup -]. The B[sub s][sup 0] production flavor is determined using the large forward-backward asymmetry of polarized Z[sup 0][yields] b[bar b] decays and charge information in the hemisphere opposite that of the B[sub s][sup 0] candidate. The decay flavor is tagged by the charge of the D[sub s][sup[+-]]. From a sample of 361 candidates with an average B[sub s][sup 0] purity of 40%, we exclude the following values of the oscillation frequency:[Delta]m[sub s]

Download or read book Lifetime Measurements with Exclusively Reconstructed B Decays written by and published by . This book was released on 2000 with total page 5 pages. Available in PDF, EPUB and Kindle. Book excerpt: Data collected with the BABAR detector at the PEP-II asymmetric B Factory at SLAC are used to measure the lifetimes of the B° and B mesons. The data sample consists of 8.3 fb−1 collected near the [Upsilon](4S) resonance. B° and B mesons are fully reconstructed in several exclusive hadronic decay modes to charm and charmonium final states. The B lifetimes are determined from the flight length difference between the two B mesons.

Download or read book Measurement of the Time Dependence of B0 B0 bar Oscillations Using Inclusive Dilepton Events written by and published by . This book was released on 2001 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: A preliminary study of time dependence of B[sup 0][bar B][sup 0] oscillations using dilepton events is presented. The flavor of the B meson is determined by the charge sign of the lepton. To separate signal leptons from cascade and fake leptons we have used a method which combines several discriminating variables in a neural network. The time evolution of the oscillations is studied by reconstructing the time difference between the decays of the B mesons produced by the[Upsilon](4S) decay. With an integrated luminosity of 7.7 fb[sup -1] collected on resonance by BABAR at the PEP-II asymmetric B Factory, we measure the difference in mass of the neutral B eigenstates, [Delta]m[sub B[sup 0]], to be (0.507[+-] 0.015[+-] 0.022) x 10[sup 12][Dirac-h] s[sup -1].

Download or read book Measurement of the BoBo Oscillation Frequency Using Fully reconstructed Semileptonic Decays written by Christopher Mark Le Clerc and published by . This book was released on 2002 with total page 578 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book The Search for Rare Non hadronic B meson Decays with Final state Neutrinos Using the BaBar Detector written by Dana Lindemann and published by . This book was released on 2012 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: "This thesis presents the searches for two rare B meson decays: the radiative leptonic decay B+ -> l+ nu gamma (l = e, mu) and the flavor-changing neutral current B -> K(*) nu nubar. These searches use the full dataset collected by the BaBar experiment, which corresponds to almost 500 million BB pairs. After fully reconstructing the hadronic decay of one of the B mesons in Upsilon(4S) -> BB decays, evidence of B+ -> l+ nu gamma or B -> K(*) nu nubar is looked for in the rest of the event. No significant evidence of either signal decay is observed. Model-independent branching-fraction upper limits are set at BR(B ->e nu gamma)17 x10 {-6}, BR(B -mu nu gamma)24 x10 {-6}, and BR(B -l nu gamma)15.6 x10 {-6}, all at the 90% confidence level. These are currently the most stringent published upper limits for B+ - l+ nu gamma. In addition, branching-fraction upper limits are set at BR(B -> K+ nu nubar)3.7 x10 {-5}, BR(B - K0 nu nubar)8.0 x10 {-5}, BR(B - K*+ nu nubar)11.5 x10 {-5}, and BR(B - K*0 nu nubar)9.2 x10 {-5}, all at the 90% confidence level. For additional sensitivity to New Physics contributions, partial B - K(*) nu nubar branching-fraction upper limits are also determined over the full kinematic range." --

Download or read book Bd Mixing Measurements with the Babar Detector written by and published by . This book was released on 2002 with total page 5 pages. Available in PDF, EPUB and Kindle. Book excerpt: The B°{bar B}° oscillation frequency [Delta] m{sub d} has been measured with the BABAR detector at the PEP-II asymmetric B factory with different experimental techniques. The discussion here is focused on the recent simultaneous measurement of [Delta] m{sub d} and [tau]{sub B°} with exclusively reconstructed B{sup 0} 2!D*− l [nu]{sub l} decays, based on 23 million B {bar B} pairs collected by BABAR. The measurements of [Delta] m{sub d} with fully reconstructed hadronic decays and with dilepton events are also reviewed. The average BABAR result is [Delta] m{sub d} = 0.500 ± 0.008 ± 0.006 ps−1.

Download or read book Observation of B0s B 0s Oscillations Using Partially Reconstructed Hadronic Bs Decays written by Jeffrey Robert Miles and published by . This book was released on 2008 with total page 241 pages. Available in PDF, EPUB and Kindle. Book excerpt: (Cont.) The discovery threshold would not be achieved without inclusion of the partially reconstructed hadronic decays. We measure ... consistent with the Standard Model expectation.

Download or read book Measurement of the B0 Lifetime and Oscillation Frequency Using Partially Reconstructed B0 D l vl Decays written by Marcello Rotondo and published by . This book was released on 2001 with total page 121 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book B Mixing and Lifetime Measurements with the BaBar Detector written by and published by . This book was released on 2001 with total page 5 pages. Available in PDF, EPUB and Kindle. Book excerpt: Recent BABAR measurements on lifetime and mixing of B mesons are reported. Various techniques are used, ranging from the full reconstruction of hadronic B decays, to partial reconstruction techniques, and to a totally inclusive approach with dilepton events. The results presented are based on a data sample collected by BABAR during the 1999-2000 data taking, and should be considered as preliminary.