997 resultados para 361.76
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Measurements of charged-particle fragmentation functions of jets produced in ultra-relativistic nuclear collisions can provide insight into the modification of parton showers in the hot, dense medium created in the collisions. ATLAS has measured jets in √sNN=2.76 TeV Pb+Pb collisions at the LHC using a data set recorded in 2011 with an integrated luminosity of 0.14 nb−1. Jets were reconstructed using the anti-kt algorithm with distance parameter values R = 0.2, 0.3, and 0.4. Distributions of charged-particle transverse momentum and longitudinal momentum fraction are reported for seven bins in collision centrality for R=0.4 jets with pjetT>100 GeV. Commensurate minimum pT values are used for the other radii. Ratios of fragment distributions in each centrality bin to those measured in the most peripheral bin are presented. These ratios show a reduction of fragment yield in central collisions relative to peripheral collisions at intermediate z values, 0.04≲z≲0.2 and an enhancement in fragment yield for z≲0.04. A smaller, less significant enhancement is observed at large z and large pT in central collisions.
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The integrated elliptic flow of charged particles produced in Pb+Pb collisions at √sNN = 2.76 TeV has been measured with the ATLAS detector using data collected at the Large Hadron Collider. The anisotropy parameter, v2, was measured in the pseudorapidity range |η| ≤ 2.5 with the event-plane method. In order to include tracks with very low transverse momentum pT, thus reducing the uncertainty in v2 integrated over pT, a 1 μb−1 data sample recorded without a magnetic field in the tracking detectors is used. The centrality dependence of the integrated v2 is compared to other measurements obtained with higher pT thresholds. The integrated elliptic flow is weakly decreasing with |η|. The integrated v2 transformed to the rest frame of one of the colliding nuclei is compared to the lower-energy RHIC data.
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A measurement of event-plane correlations involving two or three event planes of different order is presented as a function of centrality for 7 μb −1 Pb+Pb collision data at √s NN =2.76 TeV, recorded by the ATLAS experiment at the Large Hadron Collider. Fourteen correlators are measured using a standard event-plane method and a scalar-product method, and the latter method is found to give a systematically larger correlation signal. Several different trends in the centrality dependence of these correlators are observed. These trends are not reproduced by predictions based on the Glauber model, which includes only the correlations from the collision geometry in the initial state. Calculations that include the final-state collective dynamics are able to describe qualitatively, and in some cases also quantitatively, the centrality dependence of the measured correlators. These observations suggest that both the fluctuations in the initial geometry and the nonlinear mixing between different harmonics in the final state are important for creating these correlations in momentum space.
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Vorbesitzer: Eljāqīm Carmoly; Abraham Merzbacher
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Vorbesitzer: Johannes Mummelinck de Gerau; Bartholomaeusstift Frankfurt am Main
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Welsch (Projektbearbeiter): Begründung der Auflösung der zweiten preußischen Kammer (26. April 1849). In den Anlagen Rechtfertigung der Verlegung und späteren Auflösung der Preußischen Nationalversammlung sowie der Oktroyierung einer Verfassung (9. November und 5. Dezember 1848) wie auch der Ablehnung der Kaiserkrone durch Friedrich Wilhelm IV. (3. und 28. April 1849)
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Vorbesitzer: Dominikanerkloster Frankfurt am Main
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u.a.: Tyssen; Johanna Schopenhauer;
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1 Brief und Beilage vom Institut für sozialwissenschaftliche Forschung Darmstadt an Max Horkheimer, 1949; 82 Briefe zwischen Hermann Igersheimer und Max Horkheimer, 1941-1950; 5 Briefe zwischen Harold E. Jones von der University of California und Max Horkheimer, 1947; 1 Brief von Morris Janowitz an Max Horkheimer, 1948; 2 Briefe vom Jewish Community Center an Max Horkheimer, 1948; 7 Briefe zwischen Robert P. St.John und Max Horkheimer, 1945; 2 Briefe zwischen Erich von Kahler und Max Horkheimer, 1945; 2 Briefe und Beilage zwischen Anselm Kahn und Max Horkheimer, 04.07.1945, 19.07.1945;
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Frankfurter Latern: Freiexemplare, Übersendung einer Mitgliedsmarke
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Vorbesitzer: Karmeliterkloster Frankfurt am Main
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Frankfurter Latern: Probenummer, Auflage, Abrechnung
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von Paul Fuchs. unter Mitw. des Landwirts A. Hauter