2,693 research outputs found

    Framework for Identification of Neutral B Mesons

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    We introduce a method for the study of CP-violating asymmetries in tagged states of neutral BB mesons with arbitrary coherence properties. A set of time-dependent measurements is identified which completely specifies the density matrix of the initial state in a two-component space with basis vectors B0B^0 and B0\overline B^0, and permits a determination of phases in the Cabibbo-Kobayashi-Maskawa matrix. For a given tagging configuration, the measurement of decays both to flavor eigenstates and to CP eigenstates provides the necessary information.Comment: Submitted to Phys. Rev. Letters. 8 pages, LaTeX, Technion-PH-93-31 / EFI 93-3

    Charles de Gaulle’s visit to the Soviet Union and Moscow’s international policy strategy between 1966 and 1969

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    The article was submitted on 20.05.2016.The article is based on recent archival findings that throw a new light on the preparations for and results of President Charles de Gaulle’s state visit to the USSR in 1966. The results are analysed as part of the expansion of Soviet bi- and multilateral relations which developed in the context of European cooperation in the late 1960s. Special emphasis is given to the unprecedented media support for Franco-Soviet contacts. Focus is placed on the preparation and organisation of the visit, with reference to new archival materials from the Russian State Archive of Contemporary History. The author also illustrates the Soviet authorities’ realistic and flexible approach to foreign affairs. It is also noted that, regardless of the social structure of European states, issues of economic and technical collaboration were the objects of a great deal of attention. This state visit is compared with the visits of other leaders, such as Richard Nixon, Harold Macmillan, and Konrad Adenauer, to the Soviet Union. The article demonstrates that Soviet diplomats and highly-ranked officials had a very special attitude towards de Gaulle even during his resignation in 1969. The ‘special relations’ between Moscow and Paris after de Gaulle’s visit could be considered as one of the best examples of peaceful convergence between the West and the East in the 1960s.На новом архивном материале рассмотрены обстоятельства визита президента Французской Республики Шарля де Голля в Советский Союз в 1966 г. и их значение для дальнейшего развития двусторонних и многосторонних отношений СССР в широком контексте политики общеевропейского сотрудничества второй половины 1960-х гг. Показан беспрецедентный для своего времени масштаб мер информационного сопровождения советско-французских контактов. Особое внимание уделено изучению подготовки и проведения данного визита на основе новых архивных материалов РГАНИ. Показаны реалистичность и гибкость внешнеполитического подхода руководства СССР. Отмечено важное значение вопросов экономического и научно-технического сотрудничества государств Европы вне зависимости от их социального строя, которым на переговорах было уделено самое пристальное внимание. Визит анализируется в сравнении с визитами в Советский Союз таких государственных деятелей как Гарольд Макмиллан, Ричард Никсон и Конрад Аденауэр. Автор приходит к выводу об особом отношении к персоне де Голля со стороны советских дипломатов и высшего партийного руководства даже в момент его отставки с президентского поста в 1969 г. и о важности советско-французских отношений в качестве эталона возможностей мирной конвергенции Запада и Востока в 1960-х гг.Статья подготовлена в рамках гранта Президента РФ по поддержке ведущих молодых докторов МД-6912.2015.6 «Советский Союз и модернизационные вызовы 1960-х: в поисках нового внешнеэкономического инструментария»

    A Learning-Style Theory for Understanding Autistic Behaviors

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    Understanding autism's ever-expanding array of behaviors, from sensation to cognition, is a major challenge. We posit that autistic and typically developing brains implement different algorithms that are better suited to learn, represent, and process different tasks; consequently, they develop different interests and behaviors. Computationally, a continuum of algorithms exists, from lookup table (LUT) learning, which aims to store experiences precisely, to interpolation (INT) learning, which focuses on extracting underlying statistical structure (regularities) from experiences. We hypothesize that autistic and typical brains, respectively, are biased toward LUT and INT learning, in low- and high-dimensional feature spaces, possibly because of their narrow and broad tuning functions. The LUT style is good at learning relationships that are local, precise, rigid, and contain little regularity for generalization (e.g., the name–number association in a phonebook). However, it is poor at learning relationships that are context dependent, noisy, flexible, and do contain regularities for generalization (e.g., associations between gaze direction and intention, language and meaning, sensory input and interpretation, motor-control signal and movement, and social situation and proper response). The LUT style poorly compresses information, resulting in inefficiency, sensory overload (overwhelm), restricted interests, and resistance to change. It also leads to poor prediction and anticipation, frequent surprises and over-reaction (hyper-sensitivity), impaired attentional selection and switching, concreteness, strong local focus, weak adaptation, and superior and inferior performances on simple and complex tasks. The spectrum nature of autism can be explained by different degrees of LUT learning among different individuals, and in different systems of the same individual. Our theory suggests that therapy should focus on training autistic LUT algorithm to learn regularities

    Isoscalar-isovector mass splittings in excited mesons

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    Mass splittings between the isovector and isoscalar members of meson nonets arise in part from hadronic loop diagrams which violate the Okubo-Zweig-Iizuka rule. Using a model for these loop processes which works qualitatively well in the established nonets, I tabulate predictions for the splittings and associated isoscalar mixing angles in the remaining nonets below about 2.5 GeV, and explain some of their systematic features. The results for excited vector mesons compare favorably with experiment.Comment: 8 RevTeX pages, including 1 LaTeX figure. CMU-HEP93-23/DOE-ER-40682-4

    Final-State Phases in Doubly-Cabibbo-Suppressed Charmed Meson Nonleptonic Decays

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    Cabibbo-favored nonleptonic charmed particle decays exhibit large final-state phase differences in Kˉπ\bar K \pi and Kˉπ\bar K^* \pi but not Kˉρ\bar K \rho channels. It is of interest to know the corresponding pattern of final-state phases in doubly-Cabibbo-suppressed decays, governed by the cdusˉc \to d u \bar s subprocess. An experimental program is outlined for determining such phases via measurements of rates for DKπD \to K^* \pi and K(ρ,ω,ϕ)K (\rho, \omega,\phi) channels, and determination of interference between bands in Dalitz plots. Such a program is feasible at planned high-intensity sources of charmed particles.Comment: 12 pages, LaTeX, 2 figures, to be submitted to Phys. Rev. D. Revised versio

    The Ursinus Weekly, March 15, 1937

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    Ditzel is chosen 1938 Ruby editor • Vernon D. Groff elected Weekly editor at annual board meeting • Interracial fellowship to present play on Wednesday • Editor announces formal Ruby to appear on campus in May • Class Day committee named • Prom and play chairmen report completed plans • Bodley, Hayashi named to sports captaincies • Dr. Daniel Poling returns to address chapel meeting • Bassman, Paris best matmen, review of wrestling reveals • Hedgerow theatre group pleases with fine work on plays of diverse theme; English marriage laws, savagery, and modern indifference to war are subjects • Ancient Weeklies show that olden collegiates knew everything we young moderns rave about • Easter program to be offered by the choir Thursday evening • Burtons, China sojourners, tell of conditions there • Co-eds drop first to Beaver sextette • Basketball hash-over reveals that men\u27s teams won but eleven games out of twenty-nine total played • Shreiner sextette leading pack in basketball league • Thoughts turn to baseball \u27tho snow covers diamond • Hess to address postponed history social-science meeting • York alumni hold largest session and elect officers • Ursinus students participate in three college night programshttps://digitalcommons.ursinus.edu/weekly/1925/thumbnail.jp
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