Higher precision in nuclear spectroscopy

Physics Today Higher precision in nuclear spectroscopy

Precision spectroscopy and higher spin symmetry in the ABJM model

We revisit Kaluza-Klein compactification of 11-d supergravity on S/Zk using group theory techniques that may find application in other flux vacua with internal coset spaces. Among the SO(2) neutral states, we identify marginal deformations and fields that couple to the recently discussed world-sheet instanton of Type IIA on CP3. We also discuss charged states, dual to monopole operators, and th...

Precision spectroscopy of antiprotonic atoms

Precision spectroscopy of antiprotonic atoms will be an important subject to be pursued at the new antiprotonic decelerator (AD) facility being completed at CERN. In particular, the study of antiprotonic helium atoms, peÿHe2‡ pHe‡, ®rst discovered at KEK and studied in detail at low-energy antiproton ring (LEAR), will continue to be one of the most important subjects at AD. Our recent high-reso...

Precision Laser Spectroscopy of Beryllium

M. Žáková1, Z. Andjelkovic1, J. Krämer1, A. Krieger1, R. Neugart1, D. Tiedemann1, Ch. Geppert1,2, W. Nörtershäuser1,2, R. Sánchez1,2, T. Neff2, K. Blaum3, D.T. Yordanov3, M. Kowalska4, M.L. Bissell5, G.W.F. Drake6, F. Schmidt-Kaler7, Z.-C. Yan8, and C. Zimmermann9 1Universität Mainz, Germany; 2GSI, Darmstadt, Germany; 3MPI Heidelberg, Germany; 4CERN, Geneva, Switzerland; 5University of Leuven, ...

Precision spectroscopy of antiprotonic helium

Antiprotonic helium, a neutral exotic three-body system consisting of a helium nucleus, an electron and an antiproton, is being studied at the Antiproton Decelerator of CERN by the ASAUCSA collaboration. Using laser spectroscopy of the energy levels of the antiproton in this system and comparison to theory, a value of the antiproton-to-electron mass ratio with an error of 3 ppb could be obtaine...