149,261 research outputs found

    A search for time-integrated CP violation in D0hh+D^{0} \rightarrow h^{-}h^{+} decays

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    The LHCb Collaboration has recently observed evidence of CP violation in neutral D meson decays. CP violation in the charm sector is generically expected to be very small in the Standard Model, but can be enhanced in many models of new physics. In this document we will present the results of a search for time-integrated \CP violation in D0hh+D^0 \rightarrow h^- h^+ with (h=K,π)(h=K,\pi) decays, performed with around 0.6 fb1^{-1} of data collected by LHCb in 2011. The difference in CP asymmetry between D0KK+D^0 \rightarrow K^- K^+ and D0ππ+D^0 \rightarrow \pi^- \pi^+, ΔACP=ACP(KK+)ACP(ππ+)\Delta A_{CP} = A_{CP}(K^- K^+) - A_{CP}(\pi^- \pi^+) is measured to be ΔACP=[0.82±0.21(stat.)±0.11(syst.)]\Delta A_{CP} = [-0.82 \pm 0.21 (stat.) \pm 0.11 (syst.)]% . This differs from the hypothesis of CP conservation by 3.5 sigma.Comment: to appear in the proceedings of The 5th International Workshop on Charm Physics (Charm 2012

    [Review of] David Pilgrim. Race Relations Above the Veil : Speeches, Essays, and Other Writings

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    This is mostly a collection of speeches delivered to high school and college students by Pilgrim, who teaches sociology at Saint Mary\u27s College/Notre Dame. A few of the talks were given to community and business groups in several Midwestern states, and thus each selection reflects the appropriate style and content level of the audience being addressed. The content of all the pieces, including the few essays and short stories, focuses on racial prejudice, but also deals with general biases pertaining to gender, ethnic group, and class

    [Review of] Judith Ortiz Cofer. Silent Dancing: A Partial Remembrance of a Puerto Rican Childhood

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    This is a rather loose collection of cuentos, or stories, by a person of two very different worlds. In the years of her youth, Judith Ortiz was shuttled between Paterson, New Jersey, and Puerto Rico. Her parents were immersed in the Spanish culture of the Caribbean tropics; but like so many other Puerto Ricans, her father left the island in the 1950s to secure a better life for his family. He joined the US Navy and spent six months of every year at the Brooklyn Navy Yard and the rest of the time at sea. When he was stationed in Brooklyn, he would send for his wife and children to live with him in an apartment outside Paterson. Thus, young Judith spent her childhood years alternately living in a small town on a tropical island and in a large urban area in North America. Her father adjusted to the new culture, but her mother never did

    The Role of General Principles in EU Private International Law and the Perspectives of a Codification in the Field

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    The Article examines the role of general principles within the European system of private international law, with the following summary: 1. Introduction: the three different categories of general principles relevant for the construction of an EU system of private international law. 2. The general principles of private international law and the general principles of law common to most legal systems. 3. The general principles of EU law and their role in the development and the completion of the system. 4. The role of general principles and the uncertain perspectives of the adoption of an EU code of private international law
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