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SPECTROSCOPY AND REGGE TRAJECTORIES OF HEAVY QUARKONIA AND BC MESONS D. Ebert 1 , R. N. Faustov 2 and V. O. Galkin 1,2 1 Institut für Physik, Humboldt–Universität zu Berlin, Newtonstr. 15, D-12489 Berlin, Germany 2 Dorodnicyn Computing Centre, Russian Academy of Sciences, Vavilov Str. 40, 119991 Moscow, Russia The mass spectra of charmonia, bottomonia and Bc mesons are calculated in the framework of the QCD-motivated relativistic quark model based on the quasipotential approach. The dynamics of heavy quarks and antiquarks is treated fully relativistically without application of the nonrelativistic v2/c2 expansion. The known one-loop radiative corrections to the heavy quark potential are taken into account perturbatively. The heavy quarkonium masses are calculated up to rather high orbital and radial excitations (L = 5, nr = 5). On this basis the Regge trajectories are constructed both in the total angular momentum J and radial quantum number nr. It is found that the daughter trajectories are almost linear and parallel, while parent trajectories exhibit some nonlinearity in the low mass region. Such nonlinearity is most pronounced for bottomonia and is only marginal for charmonia. The obtained results are compared with the available experimental data, and a possible interpretation of the new charmonium-like states above open charm production threshold is discussed. References: D. Ebert, R. N. Faustov and V. O. Galkin, Eur.Phys.J. C71 (2011) 1825 48
CATHODE PAD CHAMBERS AT NICA/MPD J. Fedorišin † , O.V. Rogachevsky and Y.T. Kiryushin VBLHE, JINR, Dubna † E-mail: fedorisin@jinr.ru Covering pseudorapidity interval 2 < |η| < 3, the Cathode pad chambers (CPC) are part of the tracking system of the MPD detector. The CPC tracking abilities depend on its geometrical layout which defines the detector occupancy and errors of reconstructed track coordinates. This MC study presents the method for estimating track coordinates alongwiththeirexperimental errorswhicharesubsequently usedinthetracking algorithm in order to determine tracks geometric and kinematic characteristics. 49
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KAON FEMTOSCOPY CORRELATIONS IN Pb-
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A NEW APPROACH TO THE THEORY OF ELE
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LONGITUDINAL PROFILES, FLUCTUATIONS
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R&D FOR THE PANDA BARREL DIRC Maria
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