2,043 research outputs found

    Recent B Physics Results from the Tevatron

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    We review recent B physics results from the CDF and Dzero experiments in p-pbar collisions at sqrt(s) = 1.96 TeV. Using a data sample of 1.4-6.0 fb-1 collected by the CDF II detector we present searches for New Physics in Bs sector and some competitive results with B-factories in the B/charm sector. In the first category we report the BR in Bs -> J/psi f0(980) decays and the time-integrated mixing probability chi-bar of B mesons. In the second category BR and Acp in doubly Cabibbo-suppressed B+- -> D0 h+- decays and time-integrated CP violation in D0 -> h+ h- are presented.Comment: To appear in the proceeding of Rencontres de Moriond, QCD and High Energy Interactions, La Thuile, March 20-27, 2011. 6 page

    First event-by-event fluctuation studies in Pb-Pb collisions at LHC energy by the ALICE experiment

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    The presence of the phase transition can manifest itself by the characteristic behavior of several observables which may vary dramatically from one event to the other. Thus, the study of various conserved quantities on an event-by-event basis offers the possibility to study the phase transition and the nature of high density matter. The ALICE experiment is well suited for precise event-by-event measurements of various quantities. In this article, the event-by-event fluctuations of mean transverse momentum and net-charge distributions as measured by the ALICE experiment are presented

    De-leveraging and the financial accelerator: how Wall Street can shock main street

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    The severity of the recent economic downturn raises questions about the role of financial markets in modern market economies. Why did rising defaults in a relatively small portion of the U.S. housing market cause a financial crisis? Why do financial crises have outsized adverse effects on the rest of the economy? As a general rule, a decline in economic activity in the nonfinancial sector, such as occurs during a typical recession, induces greater restraint on the part of the financial sector and that restraint - manifested usually in a pullback of credit and funding - in turn causes further setbacks to the nonfinancial sector. In the academic literature, this feedback effect is called the financial accelerator. In "De-Leveraging and the Financial Accelerator: How Wall Street Can Shock Main Street," Satyajit Chatterjee looks at what underlay the financial shock that emanated from Wall Street in the fall of 2007. Then he focuses on the channels through which the financial accelerator works and how the accelerator can turn a financial market disruption into a deep recession.Financial crises ; Recessions
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