Download or read book Measurement of B sup 0 Bbar sup 0 right Arrow J psi K 0 Over S Decay Asymmetry Using Same side B flavor Tagging written by and published by . This book was released on 2000 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: We present a measurement of the time-dependent asymmetry in the rate for [anti B][sup 0] versus B[sup 0] decays to J/[psi]K[sup 0][sub s]. The data sample consists of 198 [+-] 17 B[sup 0]/[anti B][sup 0] decays collected by the CDF detector in p[anti p] collisions at the Fermilab Tevatron, where the initial b flavor has been determined by a same-side flavor tagging technique. This asymmetry is interpreted in the Standard Model as a measurement of the CP-violation parameter sin(2[beta]). Our analysis results in sin(2[beta]) = 1:8 [+-] 1:1(stat) [+-] 0:3(syst).
Download or read book Measurement of B Bbar right Arrow J psi K 0 Over S Decay Asymmetry Using Same side B flavor Tagging written by and published by . This book was released on 1998 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: We present a measurement of the time-dependent asymmetry in the rate for {anti B}° versus B° decays to J/[psi]K°{sub s}. The data sample consists of 198 ± 17 B°/{anti B}° decays collected by the CDF detector in p{anti p} collisions at the Fermilab Tevatron, where the initial b flavor has been determined by a same-side flavor tagging technique. This asymmetry is interpreted in the Standard Model as a measurement of the CP-violation parameter sin(2[beta]). Our analysis results in sin(2[beta]) = 1:8 ± 1:1(stat) ± 0:3(syst).
Download or read book Measurements of the CP violation Parameter Sin 2 Beta in B superscipt 0 right Arrow J psi K 0 Over S Decays written by and published by . This book was released on 2000 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: In the 110 pb[sup -1] Run I data sample, using three complementary flavor-tagging algorithms CDF has made a new measurement of the CP-violating asymmetry sin(2[beta])=0.79[sup +0.41][sub -0.44], This corresponds to the limit sin(2[beta])>-0.08 at 95% confidence level. This result agrees well with predictions from indirect constraints based on fits of elements of the CKM matrix.
Download or read book Measurement of the Ratio of Decay Amplitudes for B0bar J psi K 0 and B0 J psi K 0 written by and published by . This book was released on 2004 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: We have measured the time-dependent decay rate for the process B [yields] J/[psi] K*[sup 0](892) in a sample of about 88 million [Upsilon](4S) [yields] B[bar B] decays collected with the BABAR detector at the PEP-II asymmetric-energy B Factory at SLAC. In this sample we study flavor-tagged events in which one neutral B meson is reconstructed in the J/[psi]K*[sup 0] or J/[psi] [bar K]*[sup 0] final state. We measure the coefficients of the cosine and sine terms in the time-dependent asymmetries for J/[psi]K*[sup 0] and J/[psi][bar K]*[sup 0], find them to be consistent with the Standard Model expectations, and set upper limits at 90% C.L. on the decay amplitude ratios A([bar B][sup 0] [yields] J/[psi]K*[sup 0])/A(B[sup 0] [yields] J/[psi]K*[sup 0])
Download or read book Rare B Decays to States Containing a J psi Meson written by and published by . This book was released on 2003 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The authors report a study of the B meson decays, B[sup+][yields] J/[psi][phi]K[sup+], B[sup 0][yields] J/[psi][phi]K[sub S][sup 0], B[sup 0][yields] J/[psi][phi], B[sup 0][yields] J/[psi][eta] and B[sup 0][yields] J/[psi][eta][prime] using 56 million B[bar B] events collected at the[Upsilon](4S) resonance with the BABAR detector at the PEP-II e[sup+]e[sup -] asymmetric-energy storage ring. They measure the branching fractions[Beta](B[sup+][yields] J/[psi][phi]K[sup+])= (4.4[+-] 1.4(stat)[+-] 0.5(syst)) x 10[sup -5] and[Beta](B[sup 0][yields] J/[psi][phi]K[sub S][sup 0])= (5.1[+-] 1.9(stat)[+-] 0.5(syst)) x 10[sup -5], and set upper limits at 90% confidence level for the branching fractions[Beta](B[sup 0][yields] J/[psi][phi])
Download or read book Rare B Decays to States Containing a J psi 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 preliminary measurements of the branching fractions for B[sup +] [yields] J/[psi][phi]K[sup +], B[sup 0] [yields] J/[psi][phi]K[sub S][sup 0], B[sup 0] [yields] J/[psi][phi], B[sup 0] [yields] J/[psi][eta] and B[sup 0] [yields] J/[psi][eta][prime] using 56 million B[bar B] events collected at the [Upsilon](4S) resonance with the BABAR detector at PEP-II. They measure branching fractions of [Beta](B[sup +] [yields] J/[psi][phi]K[sup +]) = (4.4 [+-] 1.4(stat) [+-] 0.7(syst)) x 10[sup -5] and [Beta](B[sup 0] [yields] J/[psi][phi]K[sub S][sup 0]) = (5.1 [+-] 1.9(stat) [+-] 0.9(syst)) x 10[sup -5], and set upper limits at 90% C.L. for branching fractions [Beta](B[sup 0] [yields] J/[psi][phi])
Download or read book CP Violation B Mixing and B Lifetime Results from the BaBar Experiment written by and published by . This book was released on 2001 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The BABAR detector at the PEP-II asymmetric B Factory at SLAC collected a sample of 23 x 10[sup 6] B[bar B] pairs in the years 1999 and 2000. Using this data sample, we measure the amplitude of the time-dependent CP-violating asymmetry in neutral B decays to the CP eigenstates J/[psi] K[sub S][sup 0], [psi](2S) K[sub S][sup 0] and J/[psi] K[sub L][sup 0]. We find a value of sin2[beta]= 0.34[+-] 0.20(stat)[+-] 0.05(syst). We also present preliminary measurements of the B[sup 0][bar B][sup 0] oscillation frequency and of the lifetimes of charged and neutral B mesons.
Download or read book B sup Degree sub D Mixing and CP Violation Measurements at the Tevatron written by and published by . This book was released on 2001 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The authors present six time-dependent B[sub d][sup 0] mixing measurements of[Delta]m[sub d] from the CDF Run I data. The CDF average is[Delta]m[sub d]= .494[sub[+-] 0.26][sup[+-] 0.26](ps)[sup[minus]1]. They also present a measurement of the CP-violating asymmetry sin (2[beta]) using a sample of B[sup 0]/[bar B][sup 0][r-arrow] J/[psi]K[sub s][sup 0] decays and report sin(2[beta])= .79[sub[minus].44][sup+.41].
Download or read book CP Violation in B Decays and the BaBar Experiment written by and published by . This book was released on 2002 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: 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[sup -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[sup 0][yields] J/[psi] K[sub S][sup 0], B[sup 0][yields][psi](2S) K[sub S][sup 0] and B[sup 0][yields] J/[psi] K[sub L][sup 0] 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[sup 0][bar B][sup 0] oscillation frequency.
Download or read book MEASUREMENT OF THE POLARIZATION IN THE DECAYS B SUP 0 J PSI K SUP written by F. Abe and published by . This book was released on 1995 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Measurement of B0 s Mixing Parameters from the Flavor tagged Decay B0 s J psi Phi written by and published by . This book was released on 2008 with total page 7 pages. Available in PDF, EPUB and Kindle. Book excerpt: From an analysis of the flavor-tagged decay B{sub s}° 2!J/[psi][phi] they obtain the width difference between the B{sub s}° light and heavy mass eigenstates, [Delta][Lambda]{sub s} {triple_bond} [Lambda]{sub L} - [Lambda]{sub H} = 0.19 ± 0.07(stat){sub -0.01}{sup +0.02}(syst) ps−1, and the CP-violating phase, [phi]{sub s} = -0.57{sub -0.30}{sup +0.24}(stat){sub -0.02}{sup +0.07}(syst). The allowed 90% C.L. intervals of [Delta][Lambda]{sub s} and [phi]{sub s} are 0.06
Download or read book Measurement of the Decay Amplitudes and Branching Fractions of B J Psi K and B J psi K Decays written by and published by . This book was released on 2003 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Using data taken with the CLEO II detector, we present the first full angular analysis in the color-suppressed modes B[sup 0][yields] J/[psi] K*[sup 0] and B[sup+][yields] J/[psi] K*[sup+]. This leads to a complete determination of the decay amplitudes of these modes. In addition, we update the branching fractions for B[yields] J/[psi] K and B[yields] J/[psi] K*.
Download or read book Observation of the Decay B Jpsi Eta K and Search for the X 3872 Jpsi Eta 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 the observation of the B meson decay B[sup [+-]] [yields] J/[psi][eta]K[sup [+-]] and evidence for the decay B[sup 0] [yields] J/[psi][eta]K[sub S][sup 0], using 90 million B[bar B] events collected at the [Upsilon](4S) resonance with the BABAR detector at the PEP-II e[sup +]e[sup -] asymmetric-energy storage ring. They obtain branching fractions of [Beta](B[sup [+-]] [yields] J/[psi][eta]K[sup [+-]]) = (10.8 [+-] 2.3(stat.) [+-] 2.4(syst.)) x 10[sup -5] and [Beta](B[sup 0] [yields] J/[psi][eta]K[sub S][sup 0]) = (8.4 [+-] 2.6(stat.) [+-] 2.7(syst.)) x 10[sup -5]. They search for the new narrow mass state, the X(3872), recently reported by the Belle Collaboration, in the decay B[sup [+-]] [yields] X(3872)K[sup [+-]], X(3872) [yields] J/[psi][eta] and determine an upper limit of [Beta](B[sup [+-]] [yields] X(3872)K[sup [+-]]) [yields] (J/[psi][eta]K[sup [+-]])
Download or read book Documents concernant Jane Bryan vedette de cin ma written by and published by . This book was released on with total page 10 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Measurements of the Branching Fraction and Time Dependent CP Asymmetries of B0 to J Psi Pi0 Decays written by K. George and published by . This book was released on 2006 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: We present measurements of the branching fraction and time-dependent CP asymmetries in B{sup 0} {yields} J/{psi}{pi}{sup 0} decays based on (231.8 {+-} 2.6) x 10{sup 6} {Upsilon}(4S) {yields} B{bar B} decays collected with the BABAR detector at the SLAC PEP-II asymmetric-energy B factory. We obtain a branching fraction {Beta}(B{sup 0} {yields} J/{psi}{pi}{sup 0}) = (1.94 {+-} 0.22 (stat) {+-} 0.17 (syst)) x 10{sup -5}. We also measure the CP asymmetry parameters C = -0.21 {+-} 0.26 (stat) {+-} 0.06 (syst) and S = -0.68 {+-} 0.30 (stat) {+-} 0.04 (syst).
Download or read book A Measurement of the Time Dependence of B sub D bar B sub D Mixing with Kaon Tagging written by and published by . This book was released on 2002 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The time dependence of B[sub d] -[bar B][sub d] mixing has been measured in b[bar b] events containing one or more kaons at the SLD experiment at the Stanford Linear Accelerator Center. A simultaneous measurement of the ''right sign production fraction'' of kaons from B[sub d] decays has also been made. The initial state B hadron flavor was determined using the large forward-backward asymmetry provided by the polarized electron beam of the SLC in combination with a jet charge technique and information from the opposite hemisphere. From a sample of 400,000 Z[sup 0] events collected by the SLD experiment at SLC from 1996 to 1998, the kaon right sign production fraction has been measured to be 0.797[+-] 0.022 and the mass difference between the two B[sub d] eigenstates has been measured to be[Delta]m[sub d]= 0.503[+-] 0.028[+-] 0.020 ps[sup -1].
