Charm production in antiproton-nucleus collisions at the J/ψ and the ψ ′ thresholds Abstract We discuss the production of charmonium states in antiproton-nucleus collisions at the ψ ′ threshold. It is explained that measurements in ¯ pA collisions will allow to get new information about the strengths of the inelastic J/ψN and ψ ′ N interaction, on the production of Λc and ¯ D in charmonium-nucl...

The lightest Kaluza-Klein particle (LKP) in models with universal extra dimensions is an interesting dark matter candidate that has recently received great attention. Here, we investigate the antiproton flux from LKP annihilations in the galactic halo. In our analysis we include different halo density profiles and allow for part of the dark matter to be concentrated in ’clumps’ rather than bein...

Abstract A consistent quantum mechanical calculation of partial cross sections leading to different final states of antiprotonic helium atom was performed. For the four-body scattering wave function, corresponding to the initial state, as well as for the antiprotonic helium wave function, appearing in the final state, adiabatic approximations were used. Further, symmetric and non-symmetric effe...

Preliminary results on the measurement of the top quark mass at the Tevatron Col-lider are presented. In the dilepton decay channel, the CDF Collaboration measures mt=175.0 +17.4 −16.9 (stat.)±8.4(syst.) GeV/c 2 , using a sample of ∼126 pb −1 of proton-antiproton collision data at √ s = 1.96 TeV (Run II). In the lepton plus jets channel, the CDF Collaboration measures 177.5 +12.7 −9.4 (stat.)±7...

For Run II, 36 by 36 proton and antiproton bunches will be collided in the Tevatron during accelerator operations. The probability of successful collisions is dependent on the luminosity levels achieved during the acceleration cycles. Longitudinal emittance, a measure of the phase-space area occupied by the particles in an rf bucket, directly affects luminosity. As a result, diagnosing and elim...

These lectures contain an introduction to the search for supersymmetry at hadron colliders. The Tevatron is one of high-energy physics most sophisticated tools. The high center-of-mass energy of its proton–antiproton collisions makes it an ideal place to search for physics beyond the Standard Model, such as supersymmetry. Two experiments, CDF and DØ, completed a long data taking period in summe...

The diffraction slope parameter is investigated for elastic proton-proton and proton-antiproton scattering based on the all available experimental data at low and intermediate momentum transfer values. Energy dependence of the elastic diffraction slopes is approximated by various analytic functions. The expanded ”standard” logarithmic approximations with minimum number of free parameters allow ...

The scenario of gravitino dark matter with broken R-parity naturally reconciles three paradigms that, albeit very well motivated separately, seem to be in mutual conflict: supersymmetric dark matter, thermal leptogenesis and standard Big Bang nucleosynthesis. Interestingly enough, the products of the gravitino decay could be observed, opening the possibility of indirect detection of gravitino d...

A system was developed for bunch-by-bunch detection of transverse proton and antiproton coherent oscillations based on the signal from a single beam-position monitor (BPM) located in a region of the ring with large amplitude functions. The signal is digitized over a large number of turns and Fourier-analyzed offline with a dedicated algorithm. To enhance the signal, the beam is excited with ban...

The Facility for Low-energy Antiproton and Ion Research (FLAIR) recently got part of the FAIR core project. A large part of the wide physics program decisively relies on new experimental techniques to cool and slow down antiprotons to 20 keV, namely on the development of an ultra-low energy electrostatic storage ring (USR). For the USR to fulfil its key role in the FLAIR project, the developmen...