Observation of X(3872) production in pp collisions at √s=7TeV

Using 34.7 pb−1 of data collected with the LHCb detector, the inclusive production of the X(3872) meson in pp collisions at √s = 7 TeV is observed for the first time. Candidates are selected in the X(3872)→J/ψπ+π− decay mode, and used to measure σ(pp→X(3872)+anything)B(X(3872)→J/ψπ+π−) = 5.4 ±1.3 (stat)±0.8 (syst) nb, where σ(pp →X(3872) + anything) is the inclusive production cross section of X(3872) mesons with rapidity in the range 2.5–4.5 and transverse momentum in the range 5–20 GeV/c. In addition the masses of both the X(3872) and ψ(2S) mesons, reconstructed in the J/ψπ+π− final state, are measured to be mX(3872) = 3871.95± 0.48 (stat)±0.12 (syst) MeV/c2 and mψ(2S) = 3686.12±0.06 (stat) ±0.10 (syst) MeV/c2

All-electron Dirac-Fock-Slater SCF calculations for electronic and geometric structures of the Hg₂ and Hg₃ molecules.

The electronic and geometrical structure of neutral and cationic Hg2 and Hg3 molecules are calculated using the all-electron Dirac-Fock-Slater scf method, with relativistic numerical atomic basis functions. An improved calculation of the direct Coulomb potential has been taken into account in order to get a numerically accurate potential energy surface. The binding, ionization and excitation energies have been compared with experimental results as well as other theoretical results. © 1995 IOP Publishing Ltd

20. Arbeitsbericht der Arbeitsgruppe Energiereiche Atomare Stoesse

SIGLEAvailable from TIB Hannover / FIZ - Fachinformationszzentrum Karlsruhe / TIB - Technische InformationsbibliothekDEGerman

Relativistic effects in physics and chemistry of element 105. Pt. 2 Electronic structure and properties of group 5 elements bromides

SIGLEAvailable from TIB Hannover: RO 801(92-03) / FIZ - Fachinformationszzentrum Karlsruhe / TIB - Technische InformationsbibliothekDEGerman

Full scale relativistic ab initio time dependent caculations for the the L-K vacancy transfer in 208 MeV Ni"2"3"+ on Ge solid target

We present full scale ab initio relativistic calculations for the L-K vacancy transfer in collisions of 208 MeV Ni"2"3"+ on Ge-solid target. Our time dependent Dirac-Fock-Slater method allows to achieve a very accurate quantitative explanation for the experimental impact parameter-dependent Ni-K and Ge-K vacancy probabilities recently measured at GSI. Darmstadt in terms of dynamic creation and annihilation of Ni n=2 shell vacancies in the collision. Our calculations reveal that both the radial and rotational coupling between the molecular levels contribute to the L-K vacancy transfer. (orig.)17 refs.Available from TIB Hannover: RO 801(95-82) / FIZ - Fachinformationszzentrum Karlsruhe / TIB - Technische InformationsbibliothekSIGLEDEGerman

Physics book: CRYRING@ESR

The exploration of the unique properties of stored and cooled beams of highly-charged ions as provided by heavy-ion storage rings has opened novel and fascinating research opportunities in the realm of atomic and nuclear physics research. Since the late 1980s, pioneering work has been performed at the CRYRING at Stockholm (Abrahamsson et al. 1993) and at the Test Storage Ring (TSR) at Heidelberg (Baumann et al. 1988). For the heaviest ions in the highest charge-states, a real quantum jump was achieved in the early 1990s by the commissioning of the Experimental Storage Ring (ESR) at GSI Helmholtzzentrum für Schwerionenforschung (GSI) in Darmstadt (Franzke 1987) where challenging experiments on the electron dynamics in the strong field regime as well as nuclear physics studies on exotic nuclei and at the borderline to atomic physics were performed. Meanwhile also at Lanzhou a heavy-ion storage ring has been taken in operation, exploiting the unique research opportunities in particular for medium-heavy ions and exotic nuclei (Xia et al. 2002)