8 research outputs found

    The Physics of the B Factories

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    Physic

    A Study of the Decays of Bos Mesons produced at the Zo Resonance at LEP

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    Measurement of CKM elements and the unitarity triangle

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    An overview of experimental determinations of different CKM elements is given with an emphasis on |Vub| and |Vcb| extraction. Measurements are compared to the Standard Model predictions and constraints on the unitarity triangle, arising from combination of measurements, are presented

    Editorial: Beauty 2019 at Ljubljana, Slovenia

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    The international conference devoted to b-hadron physics at frontier machines, Beauty 2019, was held in Ljubljana, Slovenia, from 30 September to 4 October. It was the 18th edition of the series “International Conference on B-Physics at Frontier Machines”, initiated in the Czech Republic in 1993. The aims of the conference series are to review the latest results in heavy-flavour physics and discuss future directions. This year's edition attracted around 80 scientists and 65 invited talks, of which 13 were theory based

    The Physics of the B Factories

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    Physic

    The physics of the B factories

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    La presente tesis se centra en el déficit de centros educativos para personas con discapacidad en nuestro país. La tesis está enfocada en la educación e integración de personas con discapacidad dentro de la ciudad de Lima, en el distrito de Villa el Salvador. El centro educativo a realizar en la presente tesis, tendrá la calificación de centro educativo tipo 4 según el Ministerio de Educación. Esto debido a que contara con atención especializada para personas con retardo mental, trastornos de lenguaje e impedimento de movilidad leve. La propuesta de esta tesis, se presenta a través de un estudio del distrito de Villa el Salvador. Se logró analizar las deficiencias de los establecimientos de Educación y el tipo de atención que se les brinda a las personas con discapacidad severa o leve. Las personas con discapacidad son un tema importante de la presente tesis, ya que es necesario conocer las dificultades que afrontan para integrarse en la sociedad. Además, es importante mencionar el espacio físico en donde se ubicó la edificación, debido a que se debe tener todos los requerimientos establecidos para el óptimo funcionamiento. Finalmente, el diseño arquitectónico del centro educativo debe responder a las tendencias y necesidades de los usuarios.TEXTO COMPLETO NO AUTORIZADO POR EL AUTO

    Measurement of branching fractions of Λc+pKS0KS0\Lambda_c^+\to{}pK_S^0K_S^0 and Λc+pKS0η\Lambda_c^+\to{}pK_S^0\eta at Belle

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    We present a study of a singly Cabibbo-suppressed decay Λc+pKS0KS0\Lambda_c^+\to{}pK_S^0K_S^0 and a Cabibbo-favored decay Λc+pKS0η\Lambda_c^+\to{}pK_S^0\eta based on 980 fb1\rm fb^{-1} of data collected by the Belle detector, operating at the KEKB energy-asymmetric e+ee^+e^- collider. We measure their branching fractions relative to Λc+pKS0\Lambda_c^+\to{}pK_S^0: B(Λc+pKS0KS0)/B(Λc+pKS0)=(1.48±0.08±0.04)×102\mathcal{B}(\Lambda_c^+\to{}pK_S^0K_S^0)/\mathcal{B}(\Lambda_c^+\to{}pK_S^0)={(1.48 \pm 0.08 \pm 0.04)\times 10^{-2}} and B(Λc+pKS0η)/B(Λc+pKS0)=(2.73±0.06±0.13)×101\mathcal{B}(\Lambda_c^+\to{}pK_S^0\eta)/\mathcal{B}(\Lambda_c^+\to{}pK_S^0)={(2.73\pm 0.06\pm 0.13)\times 10^{-1}}. Combining with the world average B(Λc+pKS0)\mathcal{B}(\Lambda_c^+\to{}pK_S^0), we have the absolute branching fractions: B(Λc+pKS0KS0)=(2.35±0.12±0.07±0.12)×104\mathcal{B}(\Lambda_c^+\to{}pK_S^0K_S^0) = {(2.35\pm 0.12\pm 0.07 \pm 0.12 )\times 10^{-4}} and B(Λc+pKS0η)=(4.35±0.10±0.20±0.22)×103\mathcal{B}(\Lambda_c^+\to{}pK_S^0\eta) = {(4.35\pm 0.10\pm 0.20 \pm 0.22 )\times 10^{-3}}. The first and second uncertainties are statistical and systematic, respectively, while the third ones arise from the uncertainty on B(Λc+pKS0)\mathcal{B}(\Lambda_c^+\to{}pK_S^0). The mode Λc+pKS0KS0\Lambda_c^+\to{}pK_S^0K_S^0 is observed for the first time and has a statistical significance of > ⁣10σ>\!10\sigma. The branching fraction of Λc+pKS0η\Lambda_c^+\to{}pK_S^0\eta has been measured with a threefold improvement in precision over previous results and is found to be consistent with the world average
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