215 research outputs found

    Corrections to Quark Asymmetries at LEP

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    The most precise measurement of the weak mixing angle sin^2(theta) at LEP is from the forward-backward asymmetry e+e- --> bbbar at the Z-pole. In this note the QED and electroweak radiative corrections to obtain the pole asymmetry from the measured asymmetry for b- and c-quarks have been calculated using ZFITTER, which has been amended to allow a consistent treatment of partial two-loop corrections for the b-quark final asymmetries. A total correction of dAfbb=0.0019+/-0.0002 and dAfbc=0.0064+/-0.0001 has been found, where the remaining theoretical uncertainty is much too small to explain the apparent discrepancy between sin^2(theta) obtained from Afbb and from the left-right asymmetry at SLD

    Report of the Secretary of War, communicating (in compliance with a resolution of the Senate) information of facilities of approach to, and intercourse with, the mineral region of Lake Superior

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    28-2PrintingReport on the Lake Superior Mineral Lands. [456] Condition of the Indians at missions; discussion of Indian use of the region prior to ceding the land to the U.S.1845-3

    Francis Vigo. (To accompany Bill H.R. No. 282.).

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    33-1ClaimsReport : Memorial of Col. Vigo. [742] Indian trader in St. Louis in 1778; fought British and Indians in the "Illinois campaign."1854-2

    LAPORAN PRAKTEK KERJA LAPANGAN PADA UNIT LAYANAN INFORMASI & REFERENSI FAKULTAS FARMASI UNIVERSITAS AIRLANGGA SURABAYA (09 Februari -23 Maret 2004)

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    Keberadaan sebuah perpustakaan sangat dibutuhkan bagi setiap orang, hal ini karena setiap saat manusia membutuhkan informasi untu" menunjang kegiatan hidupnya sehari-hari dan kebutuhan itu dapat terpenuhi di perpustakaan, yang merupakan pusat atau lembaga yang menyediakan berbagai macam sumber informasi baik yang tercetak maupun non cetak. Sesuai dengan perkembangan zaman perpustakaan harus menyesuaikan diri dengan berbagai perubahan yang teJjadi, untuk itu menuntut pustakawan sebagai pengelola informasi untuk lebih meningkatkan kualitas & profesionalitasnya dalam hal penyediaan informasi. Terlepas dari hal diatas dengan berakhimya PKL yang dilakukan penulis diruang baca Fakultas Farmasi Unair, penulis mendapatkan data-data mengenai situasi & kondisi ruang baca Fakultas Farmasi. Sehingga dari gambaran tcrsebut dapat disimpulkan bahwa ruang baca Fakultas Farmasi Unalr adalah perpustakaan khusus yang diperuntukkan basi dosen, mahasiswa danjuga para pencHti yang dapat menunjang proses belajar-mengajar pada Ilngkungan Fakultas Farmasi Unair

    Letter from the Secretary of War, relative to the claim of the Roman Catholic mission known as the Mission of Saint James to the military reservation at Fort Vancouver, Washington Territory

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    43-2Private Land ClaimsSt. James Mission, Washington Territory. [1648] Claim for land refused by the War Dept., as it was not a missionary station among Indian tribes.1875-3

    Analysis of the exclusive final state npe+^+e^- in quasi-free np reaction

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    We report on the investigation of dielectron production in tagged quasi-free neutron-proton collisions by using a deuteron beam of kinetic energy 1.25GeV/u impinging on a liquid hydrogen target. Our measurements with HADES confirm a significant excess of e+ee^{+}e^{-} pairs above the π0\pi^{0} mass in the exclusive channel dpnpe+e(pspect)dp \rightarrow npe^{+}e^{-}(p_{spect}) as compared to the exclusive channel ppe+e ppe^{+}e^{-} measured in proton-proton collisions at the same energy. That excess points to different bremsstrahlung production mechanisms. Two models were evaluated for the role of the charged pion exchange between nucleons and double- Δ\Delta excitation combined with intermediate ρ\rho -meson production. Differential cross sections as a function of the e+ee^{+}e^{-} invariant mass and of the angles of the virtual photon, proton and electrons provide valuable constraints and encourage further investigations on both experimental and theoretical sides.Peer Reviewe
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