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Klein-Bosing C.,Institute For Kernphysik | Klein-Bosing C.,Helmholtz Center for Heavy Ion Research
Journal of Physics G: Nuclear and Particle Physics | Year: 2011

For a quantitative interpretation of reconstructed jet properties in heavy-ion collisions, it is paramount to characterize the contribution from the underlying event and the influence of background fluctuations on the jet signal. In addition to the pure number fluctuations, region-to-region correlated background within one event can enhance or deplete locally the level of background and modify the jet energy. We show the first detailed assessment of background effects using different probes embedded into heavy-ion data and quantify their influence on the reconstructed jet spectrum. © CERN 2011. Published under licence by IOP Publishing Ltd. Source


Balaguer Rios D.,Institute For Kernphysik
Nuovo Cimento della Societa Italiana di Fisica C | Year: 2012

The A4 Collaboration at the MAMI facility has measured, at backward angles and at Q2 = 0.23 (GeV/c)2 and Q2 = 0.35 (GeV/c)2, the asymmetry in the elastic and quasielastic scattering of normally polarized electrons on hydrogen and deuterium, respectively. Some preliminary results will be presented. © Società Italiana di Fisica. Source


Pierog T.,Institute For Kernphysik
Proceedings - 38th International Symposium on Multiparticle Dynamics, ISMD 2008 | Year: 2012

At high energy, cosmic rays can only be studied by measuring the extensive air showers they produce in the atmosphere of the Earth. Although the main features of air showers can be understood within a simple model of successive interactions, detailed simulations and a realistic description of particle production are needed to calculate observables relevant to air shower experiments. Currently hadronic interaction models are the main source of uncertainty of such simulations. We will study how accelerator data can constrain the different hadronic models available for extensive air shower simulations. Source


Heide M.,Institute For Kernphysik
Journal of Physics: Conference Series | Year: 2014

ALICE measured electrons from inclusive heavy-avour hadron decays and beautyhadron decays at mid-rapidity in pp collisions at S = 7 TeV and 2.76 TeV and p-Pb collisions at SNN = 5.02 TeV. For both pp collision energies, pT-differential electron production cross sections are presented and compared to pQCD predictions. For p-Pb collisions, the pT-dependent nuclear modification factor of electrons from inclusive heavy-avour hadron decays is presented. Source


Rios D.B.,Institute For Kernphysik
Hyperfine Interactions | Year: 2011

The A4 collaboration at the MAMI facility has measured at backward angles the asymmetry in the elastic and quasielastic scattering of transversely polarized electrons on hydrogen and deuterium respectively. Some preliminary results will be presented. © 2011 Springer Science+Business Media B.V. Source

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