96 research outputs found

    Search for the lepton-flavor-violating decays Bs0→e±μ∓ and B0→e±μ∓

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    A search for the lepton-flavor-violating decays Bs0→e±μ∓ and B0→e±μ∓ is performed with a data sample, corresponding to an integrated luminosity of 1.0  fb-1 of pp collisions at √s=7  TeV, collected by the LHCb experiment. The observed number of Bs0→e±μ∓ and B0→e±μ∓ candidates is consistent with background expectations. Upper limits on the branching fractions of both decays are determined to be B(Bs0→e±μ∓)101  TeV/c2 and MLQ(B0→e±μ∓)>126  TeV/c2 at 95% C.L., and are a factor of 2 higher than the previous bounds

    Search for the standard model Higgs boson at LEP

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    Measurement of cos2β\cos{2\beta} in B0D()h0B^{0} \to D^{(*)} h^{0} with DKS0π+πD \to K_{S}^{0} \pi^{+} \pi^{-} decays by a combined time-dependent Dalitz plot analysis of BaBar and Belle data

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    We report measurements of sin2β\sin{2\beta} and cos2β\cos{2\beta} from a time-dependent Dalitz plot analysis of B0D()h0B^{0} \to D^{(*)} h^{0} with DKS0π+πD \to K_{S}^{0} \pi^{+} \pi^{-} decays, where the light unflavored and neutral hadron h0h^{0} is a π0\pi^{0}, η\eta, or ω\omega meson. The analysis is performed with a combination of the final data sets of the \babar\ and Belle experiments containing 471×106471 \times 10^{6} and 772×106772 \times 10^{6} BBˉB\bar{B} pairs collected at the Υ(4S)\Upsilon\left(4S\right) resonance at the asymmetric-energy B factories PEP-II at SLAC and KEKB at KEK, respectively. We measure sin2β=0.80±0.14(stat.)±0.06(syst.)±0.03(model)\sin{2\beta} = 0.80 \pm 0.14 \,(\rm{stat.}) \pm 0.06 \,(\rm{syst.}) \pm 0.03 \,(\rm{model}) and cos2β=0.91±0.22(stat.)±0.09(syst.)±0.07(model)\cos{2\beta} = 0.91 \pm 0.22 \,(\rm{stat.}) \pm 0.09 \,(\rm{syst.}) \pm 0.07 \,(\rm{model}). The result for the direct measurement of the angle is β=(22.5±4.4(stat.)±1.2(syst.)±0.6(model))\beta = \left( 22.5 \pm 4.4 \,(\rm{stat.}) \pm 1.2 \,(\rm{syst.}) \pm 0.6 \,(\rm{model}) \right)^{\circ}. The last quoted uncertainties are due to the composition of the D0KS0π+πD^{0} \to K_{S}^{0} \pi^{+} \pi^{-} decay amplitude model, which is newly established by a Dalitz plot amplitude analysis of a high-statistics e+eccˉe^{+}e^{-} \to c\bar{c} data sample as part of this analysis. We find the first evidence for cos2β>0\cos2\beta>0 at the level of 3.73.7 standard deviations. The measurement excludes the trigonometric multifold solution π/2β=(68.1±0.7)\pi/2 - \beta = (68.1 \pm 0.7)^{\circ} at the level of 7.37.3 standard deviations and therefore resolves an ambiguity in the determination of the apex of the CKM Unitarity Triangle. The hypothesis of β=0\beta = 0^{\circ} is ruled out at the level of 5.15.1 standard deviations, and thus CP violation is observed in B0D()h0B^{0} \to D^{(*)} h^{0} decays.Comment: To be submitted to Physical Review

    It’s Not Only Rents: Explaining the Persistence and Change of Neopatrimonialism in Indonesia

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    Measurement of the very rare K+π+ννˉK^+ \to \pi^+ \nu \bar\nu decay

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    The decay K+→π+νν¯ , with a very precisely predicted branching ratio of less than 10−10 , is among the best processes to reveal indirect effects of new physics. The NA62 experiment at CERN SPS is designed to study the K+→π+νν¯ decay and to measure its branching ratio using a decay-in-flight technique. NA62 took data in 2016, 2017 and 2018, reaching the sensitivity of the Standard Model for the K+→π+νν¯ decay by the analysis of the 2016 and 2017 data, and providing the most precise measurement of the branching ratio to date by the analysis of the 2018 data. This measurement is also used to set limits on BR(K+→π+X ), where X is a scalar or pseudo-scalar particle. The final result of the BR(K+→π+νν¯ ) measurement and its interpretation in terms of the K+→π+X decay from the analysis of the full 2016-2018 data set is presented, and future plans and prospects are reviewed

    Debate on Federal Philippines: A Citizen\u27s Handbook

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    This book will surely enrich the public debate on federalism. It will provide the Filipinos with needed data on how the Federal System once embedded into our Constitution would benefit our people. - Aquilino Nene Pimentel Jr., former Senate President, Father of the Local Government Code We of the Ateneo de Manila University, through our School of Government, are glad to make this contribution to the ongoing conversation about federalism in the Philippines. It is our hope that this simple Q & A will empower more Filipinos to engage themselves in this vital issue. - Jose Ramon Villarin, SJ, President of Ateneo de Manila Universit
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