Results 21 to 30 of about 2,237 (83)

Current and future perspectives of positronium and muonium spectroscopy as dark sectors probe [PDF]

, 2019
Positronium and Muonium are purely leptonic atoms and hence free of an internal sub-structure. This qualifies them as potentially well suited systems to probe the existence of physics beyond the Standard Model. We hence carry out a comprehensive study of
Frugiuele, Claudia, Peset, Clara, Pérez-Ríos, Jesús   +2 more
core   +3 more sources

Frequency shifts in noble-gas magnetometers

, 2019
Polarized nuclei are a powerful tool in nuclear spin studies and in searches for beyond-the-standard model physics. Noble-gas comagnetometer systems, which compare two nuclear species, have thus far been limited by anomalous frequency variations of ...
Chupp, Timothy E., Degenkolb, Skyler, Fierlinger, Peter, Kuchler, Florian, Meinel, Jonas, Sachdeva, Natasha, Singh, Jaideep T., Terrano, William A.   +7 more
core   +2 more sources

Variation of fundamental constants in space and time: theory and observations

, 2008
Review of recent works devoted to the temporal and spatial variation of the fundamental constants and dependence of the fundamental constants on the gravitational potential (violation of local position invariance) is presented. We discuss the variation
Flambaum, V. V.
core   +1 more source

The RMS Charge Radius of the Proton and Zemach Moments [PDF]

, 2011
On the basis of recent precise measurements of the electric form factor of the proton, the Zemach moments, needed as input parameters for the determination of the proton rms radius from the measurement of the Lamb shift in muonic hydrogen, are calculated.
Arrington, Bawin, Bernauer, Borie, Cloet, De Rújula, De Rújula, De Rújula, Eadie, Eides, Friar, Friar, Hyde, James, Jan C. Bernauer, Janssens, Manohar, Melnikov, Michael O. Distler, Mohr, Pachucki, Pachucki, Perdrisat, Pohl, Sick, Thomas Walcher, Udem, Vanderhaeghen, Zemach   +28 more
core   +1 more source

Constraints on muon-specific dark forces

, 2014
The recent measurement of the Lamb shift in muonic hydrogen allows for the most precise extraction of the charge radius of the proton which is currently in conflict with other determinations based on $e-p$ scattering and hydrogen spectroscopy.
Karshenboim, Savely G., McKeen, David, Pospelov, Maxim   +2 more
core   +1 more source

Two-state wave packet for strong field-free molecular orientation [PDF]

, 2015
We demonstrate strong laser-field-free orientation of absolute-ground-state carbonyl sulfide molecules. The molecules are oriented by the combination of a 485-ps-long non-resonant laser pulse and a weak static electric field. The edges of the laser pulse
González-Férez, Rosario, Kienitz, Jens S., Küpper, Jochen, Mullins, Terry, Müller, Nele L. M., Trippel, Sebastian   +5 more
core   +2 more sources

Slalom in complex time: emergence of low-energy structures in tunnel ionization via complex time contours

, 2015
The ionization of atoms by strong, low-frequency fields can generally be described well by assuming that the photoelectron is, after the ionization step, completely at the mercy of the laser field. However, certain phenomena, like the recent discovery of
Ivanov, Misha, Pisanty, Emilio
core   +1 more source

Theory of the 2S-2P Lamb shift and 2S hyperfine splitting in muonic hydrogen

, 2012
The 7 standard deviations between the proton rms charge radius from muonic hydrogen and the CODATA-10 value from hydrogen spectroscopy and electron-scattering has caused considerable discussions.
Adamczak, Adamuscin, Adamuscin, Aldo Antognini, Anthony, Antognini, Antognini, Arnoult, Arrington, Barbieri, Barger, Barger, Batell, Bernauer, Biraben, Birse, Blunden, Borie, Borie, Borie, Brax, Brodsky, Carlson, Carlson, Carlson, Carlson, Carroll, Cherednikova, Chu, Cloet, Collins, Danzmann, de Beauvoir, De Rújula, De Rújula, Distler, Eides, Eides, Eides, Eides, Fischer, Flowers, Franz Kottmann, François Biraben, François Nez, Friar, Friar, Friar, Gilad, Hagley, Hanneke, Hasell, Hill, Hill, Hägler, Ivanov, Jaeckel, Jentschura, Jentschura, Jentschura, Jentschura, Jentschura, Karr, Karshenboim, Karshenboim, Karshenboim, Karshenboim, Karshenboim, Karshenboim, Kelly, Kinoshita, Kohl, Ledwig, Lorenz, Lundeen, Martynenko, Martynenko, Martynenko, Martynenko, Martynenko, McKeen, Miller, Mohr, Müller, Pachucki, Pachucki, Parthey, Parthey, Paul Indelicato, Petermann, Pineda, Pineda, Pohl, Pohl, Pohl, Prok, Randolf Pohl, Raue, Rivas, Romanov, Ron, Schwob, Sick, Sick, Sick, Slifer, Sturm, Suura, Tan, Tucker-Smith, Vanderhaeghen, Wesselmann, Zemach, Zhan   +113 more
core   +1 more source

Computation of atomic astrophysical opacities

, 2018
The revision of the standard Los Alamos opacities in the 1980-1990s by a group from the Lawrence Livermore National Laboratory (OPAL) and the Opacity Project (OP) consortium was an early example of collaborative big-data science, leading to reliable data
Mendoza, Claudio
core   +1 more source

Observation of Interactions between Trapped Ions and Ultracold Rydberg Atoms [PDF]

, 2019
We report on the observation of interactions between ultracold Rydberg atoms and ions in a Paul trap. The rate of observed inelastic collisions, which manifest themselves as charge transfer between the Rydberg atoms and ions, exceeds that of Langevin ...
Ewald, N. V., Feldker, T., Fürst, H., Gerritsma, R., Hirzler, H.   +4 more
core   +2 more sources