Download or read book Preliminary Measurements of the Time Dependence of B sub D sup 0 bar B sub D sup 0 Mixing with Kaon and Charge Dipole Tags written by and published by . This book was released on 2001 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: We report two preliminary measurements of the time dependence of B[sub d][sup 0]- B[sub d][sup 0] mixing using novel techniques with a sample of 150,000 hadronic Z[sup O] decays collected by the SLD experiment at the SLC. B decay vertices are reconstructed inclusively with a topological technique and the B hadron flavor at production is determined by exploiting the large left-right forward-backward asymmetry of Z[sup O][r-arrow] b[bar b] decays in combination with a jet charge technique. Two methods are used to tag the B flavor at decay. The first uses the charge of kaons attached to the B decay vertex and identified with the Cherenkov Ring Imaging Detector. The second measurement is based on the construction of a charge dipole of the topological vertices to separate the B[sub d][sup O]/B[sub d][sup 0] decays by exploiting the B[r-arrow] D cascade charge structure. The measurement of the oscillation frequency yields[Delta]m[sub d]= 0.58[+-] 0.07(stat)[+-]0.08(syst) ps[sup -1] and 0.56[+-] 0.08(stat)[+-]0.04(syst) ps[sup[minus]1] for the kaon and dipole tags respectively.

Download or read book Preliminary Measurements of the Time Dependence of B sub D bar B sub D Mixing with Kaon and Charge Dipole Tags written by and published by . This book was released on 1996 with total page 20 pages. Available in PDF, EPUB and Kindle. Book excerpt: We report two preliminary measurements of the time dependence of B{sub d}°- B{sub d}° mixing using novel techniques with a sample of 150,000 hadronic Z{sup O} decays collected by the SLD experiment at the SLC. B decay vertices are reconstructed inclusively with a topological technique and the B hadron flavor at production is determined by exploiting the large left-right forward-backward asymmetry of Z{sup O} → b {bar b} decays in combination with a jet charge technique. Two methods are used to tag the B flavor at decay. The first uses the charge of kaons attached to the B decay vertex and identified with the Cherenkov Ring Imaging Detector. The second measurement is based on the construction of a charge dipole of the topological vertices to separate the B{sub d}{sup O}/B{sub d}° decays by exploiting the B → D cascade charge structure. The measurement of the oscillation frequency yields [Delta]m{sub d} = 0.58 ± 0.07(stat)±0.08(syst) ps−1 and 0.56 ± 0.08(stat)±0.04(syst) ps−1 for the kaon and dipole tags respectively.

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].

Download or read book Preliminary Measurement of Time dependent B sub D sup 0 B sub D sup 0 Mixing Using Topology and Charge Selected Semi leptonic B Decays written by and published by . This book was released on 2001 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The time dependence of B[sub d][sup 0]-B[sub d][sup 0] mixing has been measured using a sample of 150,000 hadronic Z[sup 0] decays collected by the SLD experiment at the SLC between 1993 and 1995. The analysis identifies the semileptonic decays of B mesons with high (p, p[sub t]) leptons and reconstructs the B meson decay length and charge by vertexing the lepton with a partially reconstructed D meson. Vertex charge is used to enrich the selection of neutral over charged B mesons. This method results in a sample of 581 neutral decays with high charge purity. The B candidate is tagged at production with a combined tag that exploits the large polarized b forward-backward asymmetry in conjunction with the opposite hemisphere b jet charge. The final state is tagged by the sign of the high (p, p[sub t]) lepton. From their preliminary analysis the authors find a mass difference between the two B[sub d][sup 0] mass eigenstates of, [Delta]m[sub d]= 0.452[+-] 0.074(stat)[+-] 0.049(syst) ps[sup[minus]1].

Download or read book Measurement of Time Dependent B sub D sup 0 bar B sub D sup 0 Mixing Parameter Using Opposite Side Lepton and D Meson in P bar P Collisions At radical written by and published by . This book was released on 2001 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: This thesis presents the results from the investigation of time dependent B[sub d][sup 0][bar B][sub d][sup 0] mixing in B[yields] lepton X, B[sub d][sup 0][yields] D*[sup -][yields][bar D][sup 0][pi][sup -], [bar D][sup 0][yields] K[sup+][pi][sup -] channel in p[bar p] collisions at[radical]s= 1.8 TeV using 110 pb[sup -1] data collected with the CDF detector at the Fermilab Tevatron Collider. The[bar D][sup 0] vertex is reconstructed. The B[sub d][sup 0] decay length is estimated using the distance from the primary vertex to the measured position of the D[sup 0] vertex. The B[sup 0] momentum is estimated using the D[sup 0] momentum and a kinematic correction factor from Monte Carlo. With the dilution floating, [Delta]M[sub d]= 0.55[+-][sub 0.16][sup 0.15] (stat)[+-] 0.06 (syst)ps[sup -1] is measured.

Download or read book Time Dependent B sup 0 Bar B sup 0 Mixing at SLD written by and published by . This book was released on 2002 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: We report several preliminary studies of the time dependence of B[sub s][sup 0]-[bar B][sub s][sup 0] and B[sub d][sup 0]-[bar B][sub d][sup 0] mixing using a sample of 400,000 hadronic Z decays collected by the SLD experiment at the SLC. The study of B[sub d][sup 0]-[bar B][sub d][sup 0] mixing determines a value of[Delta]m[sub d]= 0.503[+-] 0.028(stat)[+-] 0.020(sys)ps[sup -1]. In the study of B[sub s][sup 0]-[bar B][sub s][sup 0] mixing, oscillation frequencies up to[Delta]m[sub s]

Download or read book Measurement of Time Dependent B sub D sup 0 bar B sub D sup 0 Mixing Parameter Using Opposite Side Lepton and D Meson in P bar P Collisions at radical s written by and published by . This book was released on 1998 with total page 177 pages. Available in PDF, EPUB and Kindle. Book excerpt: This thesis presents the results from the investigation of time dependent B{sub d}° {bar B}{sub d}° mixing in B → lepton X, B{sub d}° → D*− → {bar D}°?−, {bar D}° → K?− channel in p{bar p} collisions at √s = 1.8 TeV using 110 pb−1 data collected with the CDF detector at the Fermilab Tevatron Collider. The {bar D}° vertex is reconstructed. The B{sub d}° decay length is estimated using the distance from the primary vertex to the measured position of the D° vertex. The B° momentum is estimated using the D° momentum and a kinematic correction factor from Monte Carlo. With the dilution floating,?M{sub d} = 0.55 ±{sub 0.16}{sup 0.15} (stat) ± 0.06 (syst)ps−1 is measured.

Download or read book Measurement of Time dependent B sub D degrees bar B sub D degrees Mixing Using Inclusive Semileptonic Decays written by and published by . This book was released on 2001 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The time dependence of B[sub d][sup 0] - W[sub d][sup o] mixing has been observed in events containing high-P[sub t] leptons using a highly inclusive vertexing method to determine the B decay position. The initial state B hadron flavor was determined using the large forward-backward asymmetry provided by the highly polarized electron beam of SLC in combination with a jet charge technique. From a sample of 150,000 hadronic Z[degrees] decays observed in the SLD detector at the SLC between 1993 and 1995, a preliminary analysis of the mass difference between the two Bo mass eigenstates yields[Delta]m[sub d]= 0.520[+-] 0.072(stat)[+-] 0.035(syst) ps[sup -1].

Download or read book Measurement of Time dependent B sub D bar B sub D Mixing Using Inclusive Semileptonic Decays written by and published by . This book was released on 1996 with total page 25 pages. Available in PDF, EPUB and Kindle. Book excerpt: The time dependence of B{sub d}° - W{sub d}{sup o} mixing has been observed in events containing high-P{sub t} leptons using a highly inclusive vertexing method to determine the B decay position. The initial state B hadron flavor was determined using the large forward-backward asymmetry provided by the highly polarized electron beam of SLC in combination with a jet charge technique. From a sample of 150,000 hadronic Z° decays observed in the SLD detector at the SLC between 1993 and 1995, a preliminary analysis of the mass difference between the two Bo mass eigenstates yields [Delta]m{sub d} = 0.520 ± 0.072(stat) ± 0.035(syst) ps−1.

Download or read book Measurement of Time Dependent B D 0 Anti B D 0 Mixing at SLD written by and published by . This book was released on 2004 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The time dependence of B[sub d][sup o]-[bar B][sub d][sup o] mixing has been observed in events containing high P[sub t] leptons using a highly inclusive vertexing method to determine the B decay length and boost. The initial state B hadron flavour is determined using the large forward-backward asymmetry provided by the highly polarized electron beams of SLC in combination with a jet charge technique. From a sample of 150,000 hadronic Z[sup o] decays observed in the SLD detector at the SLC between 1993 and 1995, the mass difference between the two B[sub d][sup o] mass eigenstates has been measured to be [Delta]m[sub d] = 0.486 [+-] 0.065(stat) [+-] 0.035(syst) ps[sup -1].

Download or read book Measurement of Time Dependent B D 0 Anti B D 0 Mixing at SLD written by Ming Xiong Liu and published by . This book was released on 2003 with total page 15 pages. Available in PDF, EPUB and Kindle. Book excerpt: The time dependence of B{sub d}{sup o}-{bar B}{sub d}{sup o} mixing has been observed in events containing high P{sub t} leptons using a highly inclusive vertexing method to determine the B decay length and boost. The initial state B hadron flavour is determined using the large forward-backward asymmetry provided by the highly polarized electron beams of SLC in combination with a jet charge technique. From a sample of 150,000 hadronic Z{sup o} decays observed in the SLD detector at the SLC between 1993 and 1995, the mass difference between the two B{sub d}{sup o} mass eigenstates has been measured to be {Delta}m{sub d} = 0.486 {+-} 0.065(stat) {+-} 0.035(syst) ps{sup -1}.

Download or read book Measurement of Time dependent B sup 0 anti B sup 0 Flavor Oscillation at CDF written by and published by . This book was released on 2001 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The time dependence of B[sup 0]-[anti B][sup 0] oscillations has been studied using several techniques by the CDF experiment at Fermilab. The data comprise 110 pb[sup[minus]1] of p[anti p] collisions at[radical]s= 1.8 TeV. Preliminary measurements of the B[sup 0]-[anti B][sup 0] oscillation frequency ([Delta]m[sub d]) will be presented.

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 Search for Time Dependent B0s B0s bar Oscillations Using a Vertex Charge Dipole Technique written by and published by . This book was released on 2002 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: We report a search for B[sub s][sup 0] -[bar B][sub s][sup 0] oscillations using a sample of 400,000 hadronic Z[sup 0] decays collected by the SLD experiment. The analysis takes advantage of the electron beam polarization as well as information from the hemisphere opposite that of the reconstructed B decay to tag the B production flavor. The excellent resolution provided by the pixel CCD vertex detector is exploited to cleanly reconstruct both B and cascade D decay vertices, and tag the B decay flavor from the charge difference between them. We exclude the following values of the B[sub s][sup 0] -[bar B][sub s][sup 0] oscillation frequency:[Delta]m[sub s]

Download or read book Time Dependent B sub S sup 0 bar B sub S sup 0 Mixing Using Inclusive and Semileptonic B Decays at SLD written by and published by . This book was released on 2004 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: We set a preliminary 95% C.L. exclusion on the oscillation frequency of B[sub s][sup 0]-[bar B][sub s][sup 0] mixing using a sample of 350,000 hadronic Z[sup 0] decays collected by the SLD experiment at the SLC during the 1997-98 run. The analyses determine the b-hadron flavor at production by exploiting the large forward-backward asymmetry of polarized Z[sup 0][yields] b[bar b] decays as well as information from the hemisphere opposite that of the reconstructed B decay. In one analysis, B decay vertices are reconstructed inclusively with a new topological technique, and separation between B[sub s][sup 0] and[bar B][sub s][sup 0] decays exploits the B[sub s][sup 0][yields] D[sub s][sup -] cascade charge structure. In the other analysis, semileptonic decays are selected and the B decay point is reconstructed by intersecting a lepton track with the trajectory of a topologically reconstructed D meson. The two analyses are combined with a third analysis described elsewhere to exclude the following values of the B[sub s][sup 0]-[bar B][sub s][sup 0] mixing oscillation frequency:[Delta]m[sub s]

Download or read book A Proper Time Dependent Measurement of Delta M sup D Using Jet Charge and Soft Lepton Flavor Tagging written by and published by . This book was released on 2003 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: This thesis presents a proper time dependent measurement of the B[sup 0][sub d] mixing frequency[Delta]m[sub d] using jet charge and soft lepton flavor tagging in p-[anti p] collisions at[radical]s=1.8 TeV. The measurement uses the inclusive e and[mu] trigger data of the CDF detector from an integrated luminosity of 91 pb[sup -1]. The proper time at decay is measured from a partial reconstruction of the B associated with the trigger lepton. The measurement of[Delta]m[sub d] yields[Delta]m[sub d]=0.50[+-]0.05[+-]0.05[h-bar] ps[sup -1] where the first error is statistical and the second systematic. The flavor tagging methods used give a measured effective efficiency[epsilon]D[sup 2] of - Jet Charge:[epsilon]D[sup 2]= (0.78[+-] 0.12[+-] 0.09)% - Soft Lepton:[epsilon]D[sup 2]= (1.07[+-] 0.09[+-] 0.10)% where the first error is statistical and the second systematic.

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.