Showing papers by "Paul Jackson published in 2006"
TL;DR: In this paper, the authors present measurements of the flavor-changing neutral current decays over bar decays collected with the BABAR detector at the PEP-II e(+)e(-) storage ring.
Abstract: We present measurements of the flavor-changing neutral current decays B -> K center dot(+)center dot(-) and B -> K-*center dot(+)center dot(-), where center dot(+)center dot(-) is either an e(+)e(-) or mu(+)mu(-) pair. The data sample comprises 229x10(6) Upsilon(4S)-> B (B) over bar decays collected with the BABAR detector at the PEP-II e(+)e(-) storage ring. Flavor-changing neutral current decays are highly suppressed in the standard model and their predicted properties could be significantly modified by new physics at the electroweak scale. We measure the branching fractions B(B -> K center dot(+)center dot(-))=(0.34 +/- 0.07 +/- 0.02)x10(-6), B(B -> K-*center dot(+)center dot(-))=(0.78(-0.17)(+0.19)+/- 0.11)x10(-6), the direct CP asymmetries of these decays, and the relative abundances of decays to electrons and muons. For two regions in center dot(+)center dot(-) mass, above and below m(J/psi), we measure partial branching fractions and the forward-backward angular asymmetry of the lepton pair. In these same regions we also measure the K-* longitudinal polarization in B -> K-*center dot(+)center dot(-) decays. Upper limits are obtained for the lepton-flavor-violating decays B -> Ke mu and B -> K(*)e mu. All measurements are consistent with standard model expectations.
189 citations
TL;DR: In this article, the mass dependence of the ratio of electric and magnetic form factors, G{sub E}/G{sub M}, is measured for pp masses below 3 GeV/c{sup 2], its value is significantly larger than 1 for masses up to 2.
Abstract: The e{sup +}e{sup -}{yields}pp cross section is determined over a range of pp masses, from threshold to 4.5 GeV/c{sup 2}, by studying the e{sup +}e{sup -}{yields}pp{gamma} process. The data set corresponds to an integrated luminosity of 232 fb{sup -1}, collected with the BABAR detector at the PEP-II storage ring, at an e{sup +}e{sup -} center-of-mass energy of 10.6 GeV. The mass dependence of the ratio of electric and magnetic form factors, G{sub E}/G{sub M}, is measured for pp masses below 3 GeV/c{sup 2}; its value is found to be significantly larger than 1 for masses up to 2.2 GeV/c{sup 2}. We also measure J/{psi}{yields}pp and {psi}(2S){yields}pp branching fractions and set an upper limit on Y(4260){yields}pp production and decay.
187 citations
TL;DR: In this paper, the authors search for doubly charmed baryons in e(+)e(-) annihilations at or near a center-of-mass energy of 10.58 GeV, in a data sample with an integrated luminosity of 232 fb(-1) recorded with the BABAR detector at the PEP-II storage ring at Stanford Linear Accelerator Center.
Abstract: We search for the production of doubly charmed baryons in e(+)e(-) annihilations at or near a center-of-mass energy of 10.58 GeV, in a data sample with an integrated luminosity of 232 fb(-1) recorded with the BABAR detector at the PEP-II storage ring at the Stanford Linear Accelerator Center. We search for Xi(+)(cc) baryons in the final states Lambda K-+(c)-pi(+) and Xi(0)(c)pi(+), and Xi(++)(cc) baryons in the final states Lambda K-+(c)-pi(+)pi(+) and Xi(0)(c)pi(+)pi(+). We find no evidence for the production of doubly charmed baryons.
145 citations
TL;DR: In this article, the processes e^+e^- → 3(π+π^-)γ, 2(π^+π)-π^-π^0) and K^+K^-2(π+)γ, with the photon radiated from the initial state were studied.
Abstract: We study the processes e^+e^- → 3(π^+π^-)γ, 2(π^+π^-π^0)γ and K^+K^-2(π^+π^-)γ, with the photon radiated from the initial state. About 20 000, 33 000 and 4000 fully reconstructed events, respectively, have been selected from 232 fb^(-1) of BABAR data. The invariant mass of the hadronic final state defines the effective e^+e^- center-of-mass energy, so that these data can be compared with the corresponding direct e^+e^- measurements. From the 3(π^+π^-), 2(π^+π^-π^0) and K^+K^-2(π^+π^-) mass spectra, the cross sections for the processes e^+e^- → 3(π^+π^-), e^+e^- → 2(π^+π^-π^0) and e^+e^- → K^+K^-2(π^+π^-) are measured for center-of-mass energies from production threshold to 4.5 GeV. The uncertainty in the cross section measurement is typically 6%–15%. We observe a structure at 1.9 GeV in both cross sections and a resonance structure with mass 1645 ± 0.008 GeV/c^2 and width 0.114 ± 0.014 GeV when the ω(782)η final state is extracted. We observe the J/ψ in all these final states and measure the corresponding branching fractions.
140 citations
TL;DR: Findings confirm that employees who experience greater dialog scripting and more intensive performance monitoring show higher levels of strain, and demonstrate the importance of considering the impact of lean working practices on employee health.
Abstract: Call centers can be considered as lean service systems, with leanness being described in terms of both dialog scripting and performance monitoring. Using data from a sample of 823 call handlers from 36 call centers, these lean characteristics are examined in relation to the prediction of call handler job-related strain. Moreover, the extent to which this relationship can be accounted for by work design characteristics are examined. Findings confirm that employees who experience greater dialog scripting and more intensive performance monitoring show higher levels of strain. These relationships are fully mediated by work design. These findings demonstrate the importance of considering the impact of lean working practices on employee health.
138 citations
TL;DR: In this article, the BaBar detector at the PEP-II asymmetric energy e^+e^- storage rings at the Stanford Linear Accelerator Center running at center-of-mass energies near 10.6 GeV.
Abstract: We observe a new D_s meson with mass (2856.6 +/- 1.5_{stat.} +/- 5.0_{syst.}) MeV/c^2 and width (48 +/- 7_{stat.} +/- 10_{syst.}) MeV decaying into D^0 K^+ and D^+K^0_S. In the same mass distributions we also observe a broad structure with mass (2688 +/- 4_{stat.} +/- 3_{syst.}) MeV/c^2 and width (112 +/- 7_{stat.} +/- 36_{syst.}) MeV. To obtain this result we use 240 fb^-1 of data recorded by the BaBar detector at the PEP-II asymmetric-energy e^+e^- storage rings at the Stanford Linear Accelerator Center running at center-of-mass energies near 10.6 GeV.
126 citations
TL;DR: In this paper, the authors studied the initial-state-radiation processes e+e-→K+Kπ+π- γ using an integrated luminosity of 232fb-1 collected at the 4S mass with the BABAR detector at SLAC.
Abstract: We study the initial-state-radiation processes e+e-→K+K-π+π- γ and e+e-→K+K-π0π0γ using an integrated luminosity of 232fb-1 collected at the Υ(4S) mass with the BABAR detector at SLAC. Even though these reactions are dominated by intermediate states with excited kaons, we are able to study for the first time the cross section for e+e-→ (1020)f0(980) as a function of center-of-mass energy. We observe a structure near threshold consistent with a 1 - resonance with mass m=2.175±0. 010±0.015GeV/c2 and width Γ=58±16±20MeV. We observe no Y(4260) signal and set a limit of BY→ π+π-•ΓeeY<0. 4eV (90% confidence level), which excludes some models. © 2006 The American Physical Society.
112 citations
TL;DR: A search for the nonconservation of lepton flavor in the decay tau+/--->e+/-gamma has been performed with 2.07x10(8) e+e--->tau+tau- events collected by the BABAR detector at the SLAC PEP II storage ring at a center-of-mass energy near 10.58 GeV.
Abstract: A search for the non-conservation of lepton flavor in the decay {tau}{sup {+-}} {yields} e{sup {+-}}{gamma} has been performed with 2.07 x 10{sup 8} e{sup +}e{sup -} {yields} {tau}{sup +}{tau}{sup -} events collected by the BABAR detector at the PEP-II storage ring at a center-of-mass energy near 10.58 GeV. They find no evidence for a signal and set an upper limit on the branching ratio of {Beta}({tau}{sup {+-}} {yields} e{sup {+-}}{gamma}) < 1.1 x 10{sup -7} at 90% confidence level.
110 citations
TL;DR: In this paper, the authors measured the product of branching fractions BF(B+ --> X(3872) K+ and BF(X( 3872) --> J/psi gamma) with a statistical significance of 3.4 sigma.
Abstract: In a study of B+ --> J/psi gamma K+ decays, we find evidence for the radiative decay X(3872) --> J/psi gamma with a statistical significance of 3.4 sigma. We measure the product of branching fractions BF(B+ --> X(3872) K+).BF(X(3872) --> J/psi gamma) = (3.3 +/- 1.0 +/- 0.3) x 10^-6, where the uncertainties are statistical and systematic, respectively. We also measure the branching fraction BF(B+ --> chi_c1 K+) = (4.9 +/- 0.2 +/- 0.4) x 10^-4. These results are obtained from (287+/-3) million BBar decays collected at the Y(4S) resonance with the BaBar detector at the PEP-II B Factory at SLAC.
98 citations
TL;DR: In this paper, the authors presented results of a search for the X(3872) in B{sup 0,yields}X( 3872)K{sub S}{sup 0},X(38 72),Y(4260),J/{psi}{pi}{pi,sup +}{pi-sup -}) < 2.3.
Abstract: We present results of a search for the X(3872) in B{sup 0}{yields}X(3872)K{sub S}{sup 0},X(3872){yields}J/{psi}{pi}{sup +}{pi}{sup -}, improved measurements of B{sup -}{yields}X(3872)K{sup -}, and a study of the J/{psi}{pi}{sup +}{pi}{sup -} mass region above the X(3872). We use 232x10{sup 6} BB pairs collected at the {upsilon}(4S) resonance with the BABAR detector at the PEP-II e{sup +}e{sup -} asymmetric-energy storage rings. The results include the 90% confidence interval 1.34x10{sup -6}
84 citations
TL;DR: In this article, the first observation of an excited singly-charm baryon OmegaC* (css) in the radiative decay OmegaC0 Gamma was reported.
Abstract: We report the first observation of an excited singly-charm baryon OmegaC* (css) in the radiative decay OmegaC0 Gamma, where the OmegaC0 baryon is reconstructed in the decays to the final states Omega-pi+, Omega-pi+pi0, Omega-pi+pi-pi+, and Cascade-K-pi+pi+. This analysis is performed using a dataset of 230.7 fb$-1} collected by the BABAR detector at the PEP-II asymmetric-energy B Factory at the Stanford Linear Accelerator Center. The mass difference between the OmegaC* and the OmegaC0 baryons is measured to be 70.8 +/- 1.0 (stat) +/- 1.1 (syst) MeV/c2. We also measure the ratio of inclusive production cross sections of OmegaC* and OmegaC0 in e+e- annihilation.
TL;DR: In this article, the authors studied the two-body decays of mesons to a charmonium state and showed that the lower bound of the decays is l3.2 at 90% C.L.
Abstract: We study the two-body decays of ${B}^{\ifmmode\pm\else\textpm\fi{}}$ mesons to ${K}^{\ifmmode\pm\else\textpm\fi{}}$ and a charmonium state ${X}_{c\overline{c}}$ in a sample of $210.5\text{ }\text{ }{\mathrm{fb}}^{\ensuremath{-}1}$ of data from the BABAR experiment. We perform measurements of absolute branching fractions $\mathcal{B}({B}^{\ifmmode\pm\else\textpm\fi{}}\ensuremath{\rightarrow}{K}^{\ifmmode\pm\else\textpm\fi{}}{X}_{c\overline{c}})$ using a missing mass technique, and report several new or improved results. In particular, the upper limit $\mathcal{B}\mathbf{(}{B}^{\ifmmode\pm\else\textpm\fi{}}\ensuremath{\rightarrow}{K}^{\ifmmode\pm\else\textpm\fi{}}X(3872)\mathbf{)}l3.2\ifmmode\times\else\texttimes\fi{}{10}^{\ensuremath{-}4}$ at 90% C.L. and the inferred lower limit $\mathcal{B}\mathbf{(}X(3872)\ensuremath{\rightarrow}J/\ensuremath{\psi}{\ensuremath{\pi}}^{+}{\ensuremath{\pi}}^{\ensuremath{-}}\mathbf{)}g4.2%$ will help in understanding the nature of the recently discovered $X(3872)$.
TL;DR: In this article, a study of the processes e+e^-→ηγ and e^+e−γ at a center-of-mass energy of 10.58 GeV, using a 232 fb^(-1) data sample collected with the BABAR detector at the PEP-II collider at SLAC was performed.
Abstract: We report a study of the processes e^+e^-→ηγ and e^+e^-→η′γ at a center-of-mass energy of 10.58 GeV, using a 232 fb^(-1) data sample collected with the BABAR detector at the PEP-II collider at SLAC. We observe 20_(-5)^(+6)ηγ and 50_(-7)^(+8)η′γ events over small backgrounds, and measure the cross sections σ(e^+e^-→ηγ)=4.5_(-1.1)^(+1.2)±0.3 fb and σ(e^+e^-→η′γ)=5.4±0.8±0.3 fb. The corresponding transition form factors at q^2=112 GeV^2 are q^2|F_η(q^2)|=0.229±0.030±0.008 GeV, and q^2|F_η′(q^2)|=0.251±0.019±0.008 GeV, respectively.
TL;DR: In this paper, the photon spectrum in B → X-s gamma decay was studied using a data sample of 88.5x10(6) e(+)e(-)->Upsilon(4S)->B(B) over bar decays collected by the BABAR experiment at the Stanford Linear Accelerator Center.
Abstract: The photon spectrum in B -> X-s gamma decay, where X-s is any strange hadronic state, is studied using a data sample of 88.5x10(6) e(+)e(-)->Upsilon(4S)-> B(B) over bar decays collected by the BABAR experiment at the Stanford Linear Accelerator Center. The partial branching fraction, Delta B(B -> X-s gamma)=(3.67 +/- 0.29(stat)+/- 0.34(syst)+/- 0.29(model))x10(-4), the first moment =2.288 +/- 0.025 +/- 0.017 +/- 0.015 GeV, and the second moment =0.0328 +/- 0.0040 +/- 0.0023 +/- 0.0036 GeV2 are measured for the photon energy range 1.9 GeV 1.6 GeV. In addition, the direct CP asymmetry A(CP)(B -> Xs+d gamma) is measured to be -0.110 +/- 0.115(stat)+/- 0.017(syst).
TL;DR: In this paper, the authors performed an analysis of the three-body charmless decay B{sup {+-}} {yields} K{sup,+-}K{sup ],+-]K{Sup,+ − − K{Sup {-+}} using a sample of 226.5 million B{bar B} pairs collected by the BABAR detector and measured the total branching fraction and Cp asymmetry to be {beta} = (35.2 {+)- 0.9 {+ − 1.6 {+ -} 1.0
Abstract: The authors perform an analysis of the three-body charmless decay B{sup {+-}} {yields} K{sup {+-}}K{sup {+-}}K{sup {-+}} using a sample of 226.0 {+-} 2.5 million B{bar B} pairs collected by the BABAR detector and measure the total branching fraction and Cp asymmetry to be {beta} = (35.2 {+-} 0.9 {+-} 1.6) x 10{sup -6} and A{sub CP} = (-1.7 {+-} 2.6 {+-} 1.5)%. They fit the Dalitz plot distribution using an isobar model and report the measured values of magnitudes and phases of the production coefficients. The decay dynamics is dominated by the K{sup +}K{sup -} S-wave, for which we perform a partial-wave analysis in the region m(K{sup +}K{sup -}) < 2 GeV/c{sup 2}. They find no evidence of CP violation for individual components of the isobar model.
TL;DR: Using a vertexing technique previously employed in several analyses of all-neutral final states containing kaons, the first measurement of time-dependent CP-violating asymmetries in B0 --> K0K(S)0 is reported, obtaining S = -1.28(-0.73-0.16) and C = -0.40+/-0.06.
Abstract: The authors report observations of the b {yields} d penguin-dominated decays B{sup +} {yields} {bar K}{sup 0}K{sup +} and B{sup 0} {yields} K{sup 0}{bar K}{sup 0} in approximately 350 million {Upsilon}(4S) {yields} B{bar B} decays collected with the BABAR detector. They measure the branching fractions {Beta}(B{sup +} {yields} {bar K}{sup 0}K{sup +}) = (1.61 {+-} 0.44 {+-} 0.09) x 10{sup -6} and {Beta}(B{sup 0} {yields} K{sup 0}{bar K}{sup 0}) = (1.08 {+-} 0.28 {+-} 0.11) x 10{sup -6}, and the CP-violating charge asymmetry {Alpha}{sub CP} ({bar K}{sup 0} K{sup +}) = 0.10 {+-} 0.26 {+-} 0.03. Using a vertexing technique previously employed in several analyses of all-neutral final states containing kaons, they report the first measurement of time-dependent CP-violating asymmetries in B{sup 0} {yields} K{sub S}{sup 0}K{sub S}{sup 0}, obtaining S = -1.28{sub -0.73 -0.16}{sup +0.80 +0.11} and C = -0.40 {+-} 0.41 {+-} 0.06. They also report improved measurements of the branching fraction {Beta}(B{sup +} {yields} K{sup 0} {pi}{sup +}) = (23.9 {+-} 1.1 {+-} 1.0) x 10{sup -6} and CP-violating charge asymmetry {Alpha}{sub CP} (K{sup 0} {pi}{sup +}) = -0.029 {+-} 0.039 {+-} 0.010.
TL;DR: In this article, a measurement of the inclusive electron spectrum in B → X_ueν decays near the kinematic limit was presented, using a sample of 88 × 10^6 BB pairs recorded by the BABAR detector at the 4S resonance.
Abstract: We present a measurement of the inclusive electron spectrum in B → X_ueν decays near the kinematic limit for B → X_ceν transitions, using a sample of 88 × 10^6 BB pairs recorded by the BABAR detector at the Υ (4S resonance. Partial branching fraction measurements are performed in five overlapping intervals of the electron momentum; for the interval of 2.0 – 2.6 GeV/c we obtain ΔB (B → X_ueν) = (0.572 ± 0.041_(stat) ± 0.065_(syst)) × 10^(−3). Combining this result with shape function parameters extracted from BABAR measurements of moments of the inclusive photon spectrum in B → X_sγ decays and moments of the hadron-mass and lepton-energy spectra in B → X_clν decays we determine │Vub|= (4.44 ± 0.25 + 0.4_( exp−0.38SF) ± 0.22_(theory)) × 10^(−3). Here the first error represents the combined statistical and systematic experimental uncertainties of the partial branching fraction measurement, the second error refers to the uncertainty of the determination of the shape function parameters, and the third error is due to theoretical uncertainties in the QCD calculations.
TL;DR: In this article, the results of a search for T, CP and CPT violation in B{sup 0}-{bar B} mixing using an inclusive dilepton sample collected by the BABAR experiment at the PEP-II B Factory were reported.
Abstract: The authors report the results of a search for T, CP and CPT violation in B{sup 0}-{bar B}{sup 0} mixing using an inclusive dilepton sample collected by the BABAR experiment at the PEP-II B Factory. Using a sample of 232 million B{bar B} pairs, with a simultaneous likelihood fit of the same-sign and opposite-sign dileptons, they measure the T and Cp violation parameter |q/p|-1 = (-0.8 {+-} 2.7(stat.) {+-} 1.9(syst.)) x 10{sup -3}, and the CPT and CP parameters Im z = (-13.9 {+-} 7.3(stat.) {+-} 3.2(syst.)) x 10{sup -3} and {Delta}{Lambda} x Re z = (-7.1 {+-} 3.9(stat.) {+-} 2.0(syst.)) x 10{sup -3} ps{sup -1}. The statistical correlation between the measurements of Im z and {Delta}{Lambda} x Re z is 76%.
TL;DR: It was found that the totality of the modes of power relations operating upon virtual knowledge workers in this case study comprises a complex and sophisticated ensemble of control and constraint.
Abstract: Purpose – This paper seeks to develop insights into control, power, consent and commitment with virtual knowledge workers who are removed from the immediate sphere of influence of management and co‐workers.Design/methodology/approach – This research is a detailed case study of a highly successful Scandinavian engineering company. A post‐structuralist approach is used to understand how the modes of influence on knowledge worker productivity within the organisation come into being and operate across boundaries of time, space and organisational structure. The notion of the panopticon is used to identify and characterise forms of control and undertake interpretive and critical analysis of interview data and staff behaviour.Findings – It was found that the totality of the modes of power relations operating upon virtual knowledge workers in this case study comprises a complex and sophisticated ensemble of control and constraint. Whilst initial observations indicate that control is restricted to a small set of d...
TL;DR: In this article, a study of the mass and limits on the width of the BaBar experiment is presented using 232~${\rm fb}^{-1}$ of data collected by the Ba-Bar experiment near 10.6$~\gev.
Abstract: A study of the $D_{sJ}^*(2317)^+$ and $D_{sJ}(2460)^+$ mesons in inclusive $c\bar{c}$ production is presented using 232~${\rm fb}^{-1}$ of data collected by the BaBar experiment near $\sqrt{s} = 10.6$~\gev. Final states consisting of a $D_s^+$ meson along with one or more $\pi^0$, $\pi^\pm$, or $\gamma$ particles are considered. Estimates of the mass and limits on the width are provided for both mesons and for the $D_{s1}(2536)^+$ meson. A search is also performed for neutral and doubly-charged partners of the $D_{sJ}^*(2317)^+$ meson.
TL;DR: In this paper, the authors presented the results of a search for the decay B^0→τ^+τ^- in a data sample of (232±3)×10^6 Υ(4S)→BB decays using the BABAR detector.
Abstract: We present the results of a search for the decay B^0→τ^+τ^- in a data sample of (232±3)×10^6 Υ(4S)→BB decays using the BABAR detector. Certain extensions of the standard model predict measurable levels of this otherwise rare decay. We reconstruct fully one neutral B meson and seek evidence for the signal decay in the rest of the event. We find no evidence for signal events and obtain B(B^0→τ^+τ^-)<4.1×10^(-3) at the 90% confidence level.
TL;DR: In this paper, the first measurement of Υ(4S) decays to π+π-Υ(1S) and π +π −Υ (2S) is presented, based on a sample of 230×106 Υ4S mesons collected with the BABAR detector.
Abstract: We present the first measurement of Υ(4S) decays to π+π-Υ(1S) and π+π-Υ(2S) based on a sample of 230×106Υ(4S) mesons collected with the BABAR detector. We measure the product branching fractions B(Υ(4S)→π+π-Υ(1S))×B(Υ(1S)→μ+μ-)=(2.23±0.25stat±0.27syst)×10-6 and B(Υ(4S)→π+π-Υ(2S))×B(Υ(2S)→μ+μ-)=(1.69±0.26stat±0.20syst)×10-6, from which we derive the partial widths Γ(Υ(4S)→π+π-Υ(1S))=(1.8±0.4) keV and Γ(Υ(4S)→π+π-Υ(2S))=(2.7±0.8) keV.
TL;DR: In this article, the B-0 and B+ mesons tagged by a second B meson reconstructed in a semileptonic or hadronic decay were used to obtain B(B-0 ->pi(-)center dot(+)nu)=(1.33 +/- 0.17(stat)+/- 0.11(syst))x10(-4), where the last error is due to the normalization of the form factor.
Abstract: We report a measurement of the B ->pi center dot nu branching fraction based on 211 fb(-1) of data collected with the BABAR detector. We use samples of B-0 and B+ mesons tagged by a second B meson reconstructed in a semileptonic or hadronic decay and combine the results assuming isospin symmetry to obtain B(B-0 ->pi(-)center dot(+)nu)=(1.33 +/- 0.17(stat)+/- 0.11(syst))x10(-4). We determine the magnitude of the Cabibbo-Kobayashi-Maskawa matrix element vertical bar V-ub vertical bar by combining the partial branching fractions measured in ranges of the momentum transfer squared and theoretical calculations of the form factor. Using a recent lattice QCD calculation, we find vertical bar V-ub vertical bar=(4.5 +/- 0.5(stat)+/- 0.3(syst)0.7/0.5(FF))x10(-3), where the last error is due to the normalization of the form factor.
TL;DR: In this article, branching fraction measurements of twelve B meson decays of the form B --> D^(*)D_s(J)^*) were presented based on Y(4S) decays in BBbar pairs.
Abstract: We present branching fraction measurements of twelve B meson decays of the form B --> D^(*)D_s(J)^(*). The results are based on Y(4S) decays in BBbar pairs. One of the B mesons is fully reconstructed and the other decays to two charm mesons, of which one is reconstructed, and the mass and momentum of the other is inferred by kinematics. Combining these results with previous exclusive branching fraction measurements, we determine BR(D_s^- --> phi pi^-) = (4.62 +/- 0.36_stat. +/- 0.51_syst.)%, BR(D_sJ(2460)^- --> D_s^*- pi^0) = (56 +/- 13_stat. +/- 9_syst.)% and BR(D-sJ(2460)^- --> D_s^- gamma) = (16 +/- 4_stat. +/- 3_syst.)%.
TL;DR: Two novel determinations of /|Vub/ with reduced model dependence are reported, based on measurements of the mass distribution of the hadronic system in semileptonic B decays, based in part on fully reconstructing the decay of one B meson and identifying a charged lepton from the decay from Upsilon(4S)-->BB events.
Abstract: We report two novel determinations of |V{sub ub}| with reduced model dependence, based on measurements of the mass distribution of the hadronic system in semileptonic B decays. Events are selected by fully reconstructing the decay of one B meson and identifying a charged lepton from the decay of the other B meson from {Upsilon}(4S) {yields} (B{bar B}) events. In one approach, we combine the inclusive {bar B} {yields} X{sub u}{ell}{bar {nu}} rate with a measurement of the inclusive B {yields} X{sub s}{gamma} photon energy spectrum. We obtain |V{sub ub}| = (4.43 {+-} 0.38{sub stat} {+-} 0.25{sub syst} {+-} 0.29{sub theo}) x 10{sup -3}. In another approach we measure the total {bar B} {yields} X{sub u} {ell}{bar {nu}} rate over the full phase space and find |V{sub ub}| = (3.84 {+-} 0.70{sub stat} {+-} 0.30{sub syst} {+-} 0.10{sub theo}) x 10{sup -3}.
TL;DR: In this article, the BaBar detector was used to detect the branching fractions of the decays to multi-body final states containing protons, based on 232 million BaBar decays collected with the SLAC PEP-II asymmetric-energy $B$ factory.
Abstract: We present measurements of branching fractions of $B^0$ decays to multi-body final states containing protons, based on 232 million $\Upsilon(4S)\to B\bar{B}$ decays collected with the BaBar detector at the SLAC PEP-II asymmetric-energy $B$ factory. We measure the branching fractions ${\cal B}(B^0 \to \bar{D}^0\proton\antiproton)=(1.13\pm0.06\pm0.08)\times 10^{-4}$, ${\cal B}(B^0 \to \bar{D}^{*0}\proton\antiproton)=(1.01\pm0.10\pm0.09)\times 10^{-4}$, ${\cal B}(B^0 \to D^{-}\proton\antiproton\pi^+)=(3.38\pm0.14\pm0.29)\times 10^{-4}$, and ${\cal B}(B^0 \to D^{*-}\proton\antiproton\pi^+)=(4.81\pm0.22\pm0.44)\times 10^{-4}$ where the first error is statistical and the second systematic. We present a search for the charmed pentaquark state, $\Theta_c(3100)$ observed by H1 and put limits on the branching fraction ${\cal B} (B^0 \to \Theta_c \antiproton\pi^+)\times{\cal B}(\Theta_c \to D^{*-}\proton)<14\times10^{-6}$ and ${\cal B}(B^0 \to \Theta_c \antiproton\pi^+)\times{\cal B}(\Theta_c\to D^-\proton)<9\times10^{-6}$. Upon investigation of the decay structure of the above four $B^{0}$ decay modes, we see an enhancement at low $p\bar{p}$ mass and deviations from phase-space in the $\bar{D}\bar{p}$ and $\bar{D}p$ invariant mass spectra.
TL;DR: A measurement of the spin of the Omega- hyperon produced through the exclusive process Xi_c^0 --> Omega^- K^+ is presented using a total integrated luminosity of 116 fb^-1 recorded with the BABAR detector at the e^+ e^- asymmetric energy B-Factory at SLAC as discussed by the authors.
Abstract: A measurement of the spin of the Omega^- hyperon produced through the exclusive process Xi_c^0 --> Omega^- K^+ is presented using a total integrated luminosity of 116 fb^-1 recorded with the BABAR detector at the e^+ e^- asymmetric-energy B-Factory at SLAC. Under the assumption that the Xi_c^0 has spin 1/2, the angular distribution of the Lambda from Omega^- --> Lambda K^- decay is inconsistent with all half-integer Omega^- spin values other than 3/2. Lower statistics data for the process Omega_c^0 --> Omega^- pi^+ from a 230 fb^-1 sample are also found to be consistent with Omega^- spin 3/2. If the Xi_c^0 spin were 3/2, an Omega^- spin of 5/2 cannot be excluded.
TL;DR: In this paper, a time-dependent maximum-likelihood fit was obtained for the parameters related to the CP violation angle 2 beta+gamma: a(D pi)=-0.010 +/- 0.010, c(lep)(D*)pi=0.040 +/-0.
Abstract: We present updated results on time-dependent CP asymmetries in fully reconstructed B-0 -> D-(*)+/-pi(-/+) and B-0 -> D-+/-rho(-/+) decays in approximately 232x10(6) Upsilon(4S)-> B (B) over bar events collected with the BABAR detector at the PEP-II asymmetric-energy B factory at SLAC. From a time-dependent maximum-likelihood fit we obtain for the parameters related to the CP violation angle 2 beta+gamma: a(D pi)=-0.010 +/- 0.023 +/- 0.007, c(lep)(D pi)=-0.033 +/- 0.042 +/- 0.012, a(D*)pi=-0.040 +/- 0.023 +/- 0.010, c(lep)(D*)pi=0.049 +/- 0.042 +/- 0.015,a(D rho)=-0.024 +/- 0.031 +/- 0.009, c(lep)(D rho)=-0.098 +/- 0.055 +/- 0.018, where the first error is statistical and the second is systematic. Using other measurements and theoretical assumptions, we interpret the results in terms of the angles of the Cabibbo-Kobayashi-Maskawa unitarity triangle and find parallel to sin(2 beta+gamma)parallel to > 0.64 (0.40) at 68% (90%) confidence level.
TL;DR: In this article, the authors analyzed the decay of the BABAR detector at the SLAC PEP-II asymmetric-energy B factory with a sample of 232 × 10^6 Υ(4S) → BB decays.
Abstract: We analyze the decay B^0 → K^0_Sπ^+π^- using a sample of 232 × 10^6 Υ(4S) → BB decays collected with the BABAR detector at the SLAC PEP-II asymmetric-energy B factory. A maximum likelihood fit finds the following branching fractions: B(B^0 → K^0π^+π^-)=(43.0 ± 2.3 ± 2.3) × 10^(-6), B(B^0 → f_0(→ π^+π^-)K^0)=(5.5 ± 0.7 ± 0.5 ± 0.3)×10^(-6) and B(B^0→K^(*+)π^-)=(11.0 ± 1.5 ± 0.5 ± 0.5)×10^(-6). For these results, the first uncertainty is statistical, the second is systematic, and the third (if present) is due to the effect of interference from other resonances. We also measure the CP-violating charge asymmetry in the decay B^0 → K^(*+)π^-, A_(K*π) = -0.11 ± 0.14 ± 0.05.
TL;DR: In this paper, the authors measured the branching fractions and charge asymmetries for the decays B-->etaK*, where K* indicates a spin 0, 1, or 2 Kpi system.
Abstract: We present measurements of branching fractions and charge asymmetries for the decays B-->etaK*, where K* indicates a spin 0, 1, or 2 Kpi system. The data sample corresponds to 344x10(6) BB pairs collected with the BABAR detector at the PEP-II asymmetric-energy e+ e- collider at SLAC. We measure the branching fractions (in units of 10(-6): B(B0-->etaK*0(892))=16.5+/-1.1+/-0.8, B(B+-->etaK*+(892))=18.9+/-1.8+/-1.3, B(B0-->eta(Kpi)0*0)=11.0+/-1.6+/-1.5, B(B+-->eta(Kpi)0*+)=18.2+/-2.6+/-2.6, B(B0-->etaK2*0(1430))=9.6+/-1.8+/-1.1, and B(B+-->etaK2*+(1430))=9.1+/-2.7+/-1.4. We also determine the charge asymmetries for all decay modes.