Download or read book Measurement of Time Dependent CP Asymmetry in B0 ccbar K 0 Decays written by and published by . This book was released on 2009 with total page 15 pages. Available in PDF, EPUB and Kindle. Book excerpt: The authors present updated measurements of time-dependent Cp asymmetries in fully reconstructed neutral B decays containing a charmonium meson. The measurements reported here use a data sample of (465 ± 5) x 106 [Upsilon](4S) 2!B{bar B} decays collected with the BABAR detector at the PEP-II asymmetric energy ee− storage rings operating at the SLAC National Accelerator Laboratory. The time-dependent CP asymmetry parameters measured from J/[psi] K{sub S}°, J/[psi]K{sub L}°, [psi](2S)K{sub S}°, [eta]{sub c}K{sub S}°, [chi]{sub c1}K{sub S}° and J/[psi] K*(892)° decays are: C{sub f} = 0.024 ± 0.020(stat) ± 0.016(syst) and -[eta]{sub f}S{sub f} = 0.687 ± 0.028(stat) ± 0.012(syst).

Download or read book Improved Measurement of CP Asymmetries in B0 to ccbar K0 Decays written by and published by . This book was released on 2005 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: We present results on time-dependent CP asymmetries in neutral B decays to several CP eigenstates. The measurements use a data sample of about 227 x 106 [Upsilon](4S) → B{bar B} decays collected by the BABAR detector at the PEP-II asymmetric-energy B Factory at SLAC. The amplitude of the CP asymmetry, sin2[beta] in the Standard Model, is derived from decay-time distributions from events in which one neutral B meson is fully reconstructed in a final state containing a charmonium meson and the other B meson is determined to be either a B° or {bar B}° from its decay products. We measure sin2[beta] = 0.722 ± 0.040(stat) ± 0.023(syst) in agreement with the Standard Model expectation.

Download or read book Measurement of Time dependent CP Asymmetries in B 0 K 0 s K 0 s K 0 s Decays written by B. Aubert and published by . This book was released on 2006 with total page 17 pages. Available in PDF, EPUB and Kindle. Book excerpt: The authors present an updated measurement of the time-dependent CP-violating asymmetry in B{sup 0} {yields} K{sub S}{sup 0}K{sub S}{sup 0}K{sub S}{sup 0} decays based on 347 million {Upsilon}(4S) {yields} B{bar B} decays collected with the BABAR detector at the PEP-II asymmetric-energy B factory at SLAC. The authors obtain the CP asymmetries S{sub f} = -0.66 {+-} 0.26 {+-} 0.08 and C{sub f} = -0.14 {+-} 0.22 {+-} 0.05, where the first uncertainties are statistical and the second systematic.

Download or read book New Measurements of CP Violation in B0 to Ccbar K 0 Decays from Babar written by and published by . This book was released on 2005 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: We present new measurements of CP asymmetries in B° → (c{bar c})K{sup 0(*)} decays recorded by the BABAR detector at the PEP-II asymmetric-energy B Factory at SLAC between 1999 and 2004. We determine sin2[beta] from decay-time distributions of 7730 signal events in a data sample of approximately 227 x 106 [Upsilon](4S) → B{bar B} decays. The measured value of sin2[beta] = 0.722 ± 0.040(stat) ± 0.023(syst) is in agreement with the value expected from the Standard Model. In a separate time-dependent angular analysis of B → J/[psi] K*° (K*° → K{sub S}°[pi]°) decays we measure cos 2[beta] to be positive at 86% CL.

Download or read book Measurement of Time dependent CP Violating Asymmetries in B0 K K K0L Decays written by J. C. Chen and published by . This book was released on 2005 with total page 19 pages. Available in PDF, EPUB and Kindle. Book excerpt: The authors present preliminary measurements of the Cp asymmetry parameters and CP content in B{sup 0} {yields} K{sup +}K{sup -}K{sub L}{sup 0} decays, with B{sup 0} {yields} {phi}K{sub L}{sup 0} events excluded. In a sample of 227 M B{bar B} pairs collected by the BABAR detector at the PEP-II B Factory at SLAC, they find the CP parameters to be S = 0.07 {+-} 0.28(stat){sub -0.12}{sup +0.11}(syst); C = 0.54 {+-} 0.22(stat){sub -0.09}{sup +0.08}(syst) where the first error is statistical and the second is systematic. Estimating the fraction of CP-odd final states from angular moments analysis in the K{sup +}K{sup -}K{sub S}{sup 0} CP-conjugate final state, f{sub odd}(K{sup +}K{sup -}K{sub L}{sup 0}) = 0.92 {+-} 0.07(stat) {+-} 0.06(syst), they determine sin2{beta}{sub eff} = 0.09 {+-} 0.33(stat){sub -0.14}{sup +0.13}(syst) {+-} 0.10(syst CP-cont) where the last error is due to uncertainty on the CP content.

Download or read book C r monie du centenaire de la naissance de Jean Charcot la Sorbonne le 25 mai 1925 Discours de M Charles Lallemand written by and published by . This book was released on 1925 with total page 10 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Measurement of CP Asymmetries in B0 to Phi K0 and B0 to K K Ks Decays written by and published by . This book was released on 2005 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: We measure the time-dependent CP asymmetry parameters in B° 2!KK−K° based on a data sample of approximately 227 million B-meson pairs recorded at the [Upsilon](4S) resonance with the BABAR detector at the PEP-II B-meson Factory at SLAC. We reconstruct two-body B° decays to [phi](1020)K{sub s}° and [phi](1020)K{sub L}°, and the three-body decay KK−K{sub s}° with [phi](1020)K{sub s}° excluded. For the B° 2![phi]K° decays, they measure sin 2[beta]{sub eff}([phi]K°) = +0.50 ± 0.25(stat){sub -0.04}{sup +0.07}(syst). The B° 2!K+K−K{sub s}° decays are dominated by K+K− S-wave, as determined from an angular analysis; they measure sin 2[beta]{sub eff} (K+K−K{sub s}°) = +0.55 ± 0.22(stat) ± 0.04(syst) ± 0.11(CP), where the last error is due to the uncertainty in the fraction of CP-even contributions to the decay amplitude. We find no evidence for direct CP violation.

Download or read book Time Dependent CP Violation Measurements written by Markus Röhrken and published by Springer Science & Business Media. This book was released on 2013-10-17 with total page 205 pages. Available in PDF, EPUB and Kindle. Book excerpt: This thesis describes a high-quality, high-precision method for the data analysis of an interesting elementary particle reaction. The data was collected at the Japanese B-meson factory KEKB with the Belle detector, one of the most successful large-scale experiments worldwide. CP violation is a subtle quantum effect that makes the world look different when simultaneously left and right and matter and antimatter are exchanged. This being a prerequisite for our own world to have developed from the big bang, there are only a few experimental indications of such effects, and their detection requires very intricate techniques. The discovery of CP violation in B meson decays garnered Kobayashi and Maskawa, who had predicted these findings as early as 1973, the 2008 Nobel prize in physics. This thesis describes in great detail what are by far the best measurements of branching ratios and CP violation parameters in two special reactions with two charm mesons in the final state. It presents an in-depth but accessible overview of the theory, phenomenology, experimental setup, data collection, Monte Carlo simulations, (blind) statistical data analysis, and systematic uncertainty studies.

Download or read book Measurement of Time Dependent CP Asymmetry Parameters in B0 Meson Decays to OmegaKs EtaprimeKz and Pi0Ks written by and published by . This book was released on 2008 with total page 18 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Measurement of Time Dependent CP Violating Asymmetries in B 0 Meson Decays to Eta K 0 L written by J. C. Chen and published by . This book was released on 2005 with total page 15 pages. Available in PDF, EPUB and Kindle. Book excerpt: The authors present a preliminary measurement of CP-violating parameters S and C from fits of the time-dependence of B{sup 0} meson decays to {eta}'K{sub L}{sup 0}. The data were recorded with the BABAR detector at PEP-II and correspond to 232 x 10{sup 6} B{bar B} pairs produced in e{sup +}e{sup -} annihilation through the {Upsilon}(4S) resonance. By fitting the time-dependent CP asymmetry of the reconstructed B{sup 0} {yields} {eta}'K{sub L}{sup 0} events, they find S = 0.60 {+-} 0.31 {+-} 0.04 and C = 0.10 {+-} 0.21 {+-} 0.03, where the first error quoted is statistical and the second is systematic. They also perform a combined fit using both {eta}'K{sub S}{sup 0} and {eta}'K{sub L}{sup 0} data, and find S = 0.36 {+-} 0.13 {+-} 0.03 and C = -0.16 {+-} 0.09 {+-} 0.02.

Download or read book Measurement of Time Dependent CP Violating Asymmetries in B0 K 0 Gamma K 0 K0 sub S Pi0 Decays written by and published by . This book was released on 2004 with total page 8 pages. Available in PDF, EPUB and Kindle. Book excerpt: We present a measurement of the time-dependent CP-violating asymmetries in B° → K*°[gamma](K*° → K{sub S}°[pi]°) decays based on 124 million [Upsilon](4S) → B{bar B} decays collected with the BABAR detector at the PEP-II asymmetric-energy B Factory at the Stanford Linear Accelerator Center. In a sample containing 105 ± 14 signal decays, we measure S{sub K*{sub {gamma}}} = 0.25 ± 0.63 ± 0.14 and C{sub K*{sub {gamma}}} = -0.57 ± 0.32 ± 0.09, where the first error is statistical and the second systematic.

Download or read book Measurement of CP Asymmetry in B0 F0 K0 S B0 Phi K0 And B0 K K K0 S Decays written by Paul E. Kutter and published by . This book was released on 2006 with total page 4 pages. Available in PDF, EPUB and Kindle. Book excerpt: The authors present results on time-dependent CP asymmetries in f{sub 0}(980)({yields} {pi}{sup +}{pi}{sup -})K{sub S}{sup 0} and B{sup 0} {yields} K{sup +}K{sup -}K{sup 0}. The measurements use a data sample consisting of approximately 209(f{sub 0}(980)({yields} {pi}{sup +}{pi}{sup -})K{sub S}{sup 0}) and 227(B{sup 0} {yields} K{sup +}K{sup -}K{sup 0}) million B-meson pairs recorded at the {Upsilon}(4S) resonance with the BABAR detector at the PEP-II B-meson Factory at SLAC.

Download or read book Measurement of the Time Dependent CP Violating Asymmetry in B 0 to K 0 s pi 0 gamma Decays written by and published by . This book was released on 2005 with total page 8 pages. Available in PDF, EPUB and Kindle. Book excerpt: We present a measurement of the time-dependent CP-violating asymmetry in B° 2!K*°[gamma] decays with K*° 2!K{sub S}°[pi]° based on 232 million [Upsilon](4S) 2!B{bar B} decays collected with the BABAR detector at the PEP-II asymmetric-energy ee− collider at SLAC. In a sample containing 157 ± 16 signal decays, we measure S{sub K*°[gamma]} = -0.21 ± 0.40 ± 0.05 and C{sub K*°[gamma]} = -0.40 ± 0.23 ± 0.03, where the first error is statistical and the second systematic. We also explore B° 2!K{sub S}°[pi]°[gamma] decays with 1.1

Download or read book Measurements of Time dependent CP Asymmetries in B0 D D Decays written by and published by . This book was released on 2009 with total page 13 pages. Available in PDF, EPUB and Kindle. Book excerpt: We present new measurements of time-dependent CP asymmetries for B° --> D{sup (*)+}d{sup (*)-} decays using (467 ± 5) x 106 B{bar B} pairs collected with the BABAR detector located at the PEP-II B Factory at the Stanford Linear Accelerator Center. We determine the CP-odd fraction of the B° --> D*D*− decays to be R(up tack) = 0.158 ± 0.028 ± 0.006 and find CP asymmetry parameters for the CP-even component of the decay S+ = -0.76 ± 0.16 ± 0.04 and C+ = 0.00 ± 0.12 ± 0.02. We measure S = -0.63±0.36±0.05 and C = -0.07±0.23±0.03 for B° --> DD−, S = -0.62±0.21±0.03 and C = 0.08 ± 0.17 ± 0.04 for B° --> D*+D−, and S = -0.73 ± 0.23 ± 0.05 and C = 0.00 ± 0.17 ± 0.03 for B° --> D+D*−. For the B° --> D*{sup ±}D{sup {-+}} decays, we also determine the CP-violating asymmetry A = 0.008 ± 0.048 {+-} 0.013. In each case, the first uncertainty is statistical and the second is systematic. The measured values for the asymmetries are all consistent with the Standard Model.

Download or read book Measurement of Time dependent CP Violating Asymmetries in B0 KsKsKs Decays written by J. C. Chen and published by . This book was released on 2005 with total page 15 pages. Available in PDF, EPUB and Kindle. Book excerpt: The authors present preliminary measurements of the CP asymmetry parameters in B{sup 0} {yields} K{sub S}{sup 0}K{sub S}{sup 0}K{sub S}{sup 0} decays, reconstructing two of the K{sub S}{sup 0} into {pi}{sup +}{pi}{sup -} and one into {pi}{sup 0}{pi}{sup 0}. In a sample of 227 M B{bar B} pairs collected by the BABAR detector at the PEP-II B Factory at SLAC, they find the CP parameters to be S = -0.25{sub -0.61}{sup +0.68}(stat) {+-} 0.05(syst) and C = 0.56{sub -0.43}{sup +0.34}(stat) {+-} 004(syst). Combining this result with the previous BABAR measurement, obtained from events with three K{sub S}{sup 0} decaying into {pi}{sup +}{pi}{sup -}, they get S = -0.63{sub -0.28}{sup +0.32}(stat) {+-} 0.04(syst); C = -0.10 {+-} 0.25(stat) {+-} 0.05, (syst).

Download or read book Update of Time Dependent CP Asymmetry Measurements in B to C cbar s Decays written by and published by . This book was released on 2008 with total page 19 pages. Available in PDF, EPUB and Kindle. Book excerpt: We present updated measurements of time-dependent CP asymmetries in fully reconstructed neutral B decays containing a charmonium meson. The measurements reported here use a data sample of (465 ± 5) x 106 [Upsilon](4S) → B{bar B} decays collected with the BABAR detector at the PEP-II B factory. The time-dependent CP asymmetry parameters measured from J/[psi]K{sub S}°, J/[psi]K{sub L}°, [psi](2S)K{sub S}°, [chi]{sub c1}K{sub S}°, [eta]{sub c}K{sub S}°, and J/[psi]K*° decays are: (1) C{sub f} = 0.026 ± 0.020(stat) ± 0.016(syst); and (2) S{sub f} = 0.691 ± 0.029(stat) ± 0.014(syst).

Download or read book Measurement of Time Dependent CP Asymmetry in B0 KS Pi0 Gamma 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 measure the time-dependent CP asymmetry in B° 2!K{sub S}°[pi]°[gamma] decays for two regions of K{sub S}°-[pi]° invariant mass, m(K{sub S}°[pi]°), using the final BABAR data set of 467 x 106 B{bar B} pairs collected at the PEP-II ee− collider at SLAC. They find 339 ± 24 B° 2!K*°[gamma] candidates and measure S{sub K*[gamma]} = -0.03 ± 0.29 ± 0.03 and C{sub K*[gamma]} = -0.14 ± 0.16 ± 0.03. In the range 1.1