K. Jungmann
A5032279219- Atomic and Molecular Physics
- Particle physics theoretical and experimental studies
- Muon and positron interactions and applications
- Atomic and Subatomic Physics Research
- Particle accelerators and beam dynamics
- Nuclear physics research studies
- Cold Atom Physics and Bose-Einstein Condensates
- Neutrino Physics Research
- Advanced Frequency and Time Standards
- Quantum Chromodynamics and Particle Interactions
- Dark Matter and Cosmic Phenomena
- Superconducting Materials and Applications
- Nuclear Physics and Applications
- Quantum, superfluid, helium dynamics
- Computational Physics and Python Applications
- Noncommutative and Quantum Gravity Theories
- Spectroscopy and Laser Applications
- Particle Detector Development and Performance
- Laser-Matter Interactions and Applications
- High-Energy Particle Collisions Research
- Advanced Chemical Physics Studies
- Radioactive Decay and Measurement Techniques
- Advanced NMR Techniques and Applications
- Quantum optics and atomic interactions
- Laser Design and Applications
University of Groningen
2014-2024
National Institute for Subatomic Physics
2019-2024
Zorginstituut Nederland
2001-2013
Centre National de la Recherche Scientifique
2009
Commissariat à l'Énergie Atomique et aux Énergies Alternatives
2009
CEA DAM Île-de-France
2009
KU Leuven
2009
École Nationale Supérieure d'Ingénieurs de Caen
2009
Institut National de Physique Nucléaire et de Physique des Particules
2009
GANIL
2009
We present the final report from a series of precision measurements muon anomalous magnetic moment, ${a}_{\ensuremath{\mu}}=(g\ensuremath{-}2)/2$. The details experimental method, apparatus, data taking, and analysis are summarized. Data obtained at Brookhaven National Laboratory, using nearly equal samples positive negative muons, were used to deduce ${a}_{\ensuremath{\mu}}(\mathrm{\text{Expt}})=11659208.0(5.4)(3.3)\ifmmode\times\else\texttimes\fi{}{10}^{\ensuremath{-}10}$, where...
The anomalous magnetic moment of the negative muon has been measured to a precision 0.7 ppm (ppm) at Brookhaven Alternating Gradient Synchrotron. This result is based on data collected in 2001, and over an order magnitude more precise than previous measurement for muon. a(mu(-))=11 659 214(8)(3) x 10(-10) (0.7 ppm), where first uncertainty statistical second systematic, consistent with measurements anomaly positive average a(mu)(exp)=11 208(6) (0.5 ppm).
A precise measurement of the anomalous g value, a(mu) = (g-2)/2, for positive muon has been made at Brookhaven Alternating Gradient Synchrotron. The result a(mu+) 11 659 202(14) (6) x 10(-10) (1.3 ppm) is in good agreement with previous measurements and an error one third that combined data. current theoretical value from standard model a(mu)(SM) 159.6(6.7) (0.57 a(mu)(exp) - 43(16) which world average experimental value.
Three independent searches for an electric dipole moment (EDM) of the positive and negative muons have been performed, using spin precession data from muon g-2 storage ring at Brookhaven National Laboratory. Details on experimental apparatus three analyses are presented. Since individual results muon, as well combined result, d=-0.1(0.9)E-19 e-cm, all consistent with zero, we set a new EDM limit, |d| < 1.9E-19 e-cm (95% C.L.). This represents factor 5 improvement over previous best limit EDM.
Abstract The Physics Beyond Colliders initiative is an exploratory study aimed at exploiting the full scientific potential of CERN’s accelerator complex and infrastructures through projects complementary to LHC other possible future colliders. These will target fundamental physics questions in modern particle physics. This document presents status proposals presented framework Standard Model working group, explore their reach impact that CERN could have next 10–20 years on international landscape.
A higher precision measurement of the anomalous g value, a(mu)=(g-2)/2, for positive muon has been made at Brookhaven Alternating Gradient Synchrotron, based on data collected in year 2000. The result a(mu(+))=11 659 204(7)(5)x10(-10) (0.7 ppm) is good agreement with previous measurements and an error about one-half that combined data. present world average experimental value a(mu)(expt)=11 203(8)x10(-10) ppm).
High precision measurements of two Zeeman hyperfine transitions in the ground state muonium a strong magnetic field have been made at LAMPF using microwave resonance spectroscopy and line narrowing technique. These determine most precise values structure interval $\ensuremath{\Delta}\ensuremath{\nu}\phantom{\rule{0ex}{0ex}}=\phantom{\rule{0ex}{0ex}}4463302765(53)\mathrm{Hz}$ $(12\mathrm{ppb})$, ratio moments...
The conclusions of the Physics Working Group international scoping study a future Neutrino Factory and super-beam facility (the ISS) are presented. ISS was carried by community between NuFact05, 7th International Workshop on Factories Superbeams, Laboratori Nazionali di Frascati, Rome, June 21-26, 2005) NuFact06 (Ivine, California, 24{30 August 2006). physics case for an extensive experimental programme to understand properties neutrino is presented role high-precision measurements...
A new highly sensitive method of looking for electric dipole moments charged particles in storage rings is described. The major systematic errors inherent the are addressed and ways to minimize them suggested. It seems possible measure muon EDM levels that test speculative theories beyond standard model.
A new upper limit for the probability of spontaneous muonium to antimuonium conversion was established at PMM¯≤8.3×10−11 ( 90% C.L.) in 0.1 T magnetic field, which implies consequences speculative extensions standard model. Coupling parameters R-parity-violating supersymmetry and mass a flavor diagonal bileptonic gauge boson can be significantly restricted. Z8 model with radiative generation through heavy lepton seed minimal version 331 models are disfavored.Received 13 July...
The Muon (g-2) Experiment, E989 at Fermilab, will measure the muon anomalous magnetic moment a factor-of-four more precisely than was done in E821 Brookhaven National Laboratory AGS. result appears to be greater Standard-Model prediction by three standard deviations. When combined with expected improvement hadronic contributions, should able determine definitively whether or not is evidence for physics beyond Standard Model. After review of motivation and basic technique, which use storage...
We investigate the merits of a measurement permanent electric dipole moment electron ($e$EDM) with barium monofluoride molecules, thereby searching for phenomena CP violation beyond those incorporated in Standard Model particle physics. Although BaF molecule has smaller enhancement factor terms effective field than other molecules used current studies (YbF, ThO and ThF$^+$), we show that competitive is possible by combining Stark-deceleration, laser-cooling an intense primary cold source...
The NL-eEDM collaboration is building an experimental setup to search for the permanent electric dipole moment of electron in a slow beam cold barium fluoride molecules [Eur. Phys. J. D, 72, 197 (2018)]. Knowledge molecular properties BaF thus needed plan measurements and particular determine optimal laser-cooling scheme. Accurate reliable theoretical predictions these require incorporation both high-order correlation relativistic effects calculations. In this work investigations ground...
We describe the status of our effort to realize a first neutrino factory and progress made in understanding problems associated with collection cooling muons towards that end. summarize physics can be done factories as well intense cold beams muons. The potential muon colliders is reviewed, both Higgs Factories compact high energy lepton colliders. timescale research development reviewed latest designs channels including promise ring coolers achieving longitudinal transverse simultaneously....
Atoms with energies of several electronvolts are ejected if small metal particles illuminated low-intensity visible laser light. The desorption rate exhibits a resonant behavior its maximum at \ensuremath{\lambda}=490 nm for 50 average radius. novel process is explained by mechanism laser-induced that based on surface-plasmon excitation.
Received 22 August 2002DOI:https://doi.org/10.1103/PhysRevLett.89.129903©2002 American Physical Society
We report on a theoretical analysis of the suitability $7s\phantom{\rule{0.2em}{0ex}}^{2}S_{1∕2}\ensuremath{\leftrightarrow}6d\phantom{\rule{0.2em}{0ex}}^{2}D_{3∕2}$ transition in singly ionized radium to measure parity nonconservation, light an experiment planned at KVI University Groningen. Relativistic coupled-cluster theory has been employed perform ab initio calculation parity-nonconserving electric dipole amplitude this transition, including single, double, and leading triple...
The 1s-2s interval has been measured in the muonium (&mgr;(+)e(-)) atom by Doppler-free two-photon pulsed laser spectroscopy. frequency separation of states was determined to be 2 455 528 941.0(9.8) MHz, good agreement with quantum electrodynamics. result may interpreted as a measurement muon-electron charge ratio -1-1.1(2.1)x10(-9). We expect significantly higher accuracy at future high flux muon sources and from cw technology.
Following a suggestion from Kostelecký et al., we evaluated test of CPT and Lorentz invariance the microwave spectroscopy muonium. Hamiltonian terms beyond standard model violating would contribute frequency shifts deltanu(12) deltanu(34) to nu(12) nu(34), two transitions involving muon spin flip, which were precisely measured in ground state muonium strong magnetic field 1.7 T. The be indicated by anticorrelated oscillations nu(34) at Earth's sidereal frequency. No time dependence was found...
First laser cooling and trapping of the heavy alkaline earth element barium has been achieved based on strong 6s$^2$ $^1$S$_0$ - 6s6p $^1$P$_1$ transition for main cooling. Due to large branching into metastable D-states several additional driven transitions are required provide a closed cycle. A total efficiency $0.4(1) \cdot 10^{-2}$ slowing thermal atomic beam capturing atoms magneto optical trap was obtained. Trapping lifetimes more than 1.5 s were observed. This lifetime is shortened at...
The muon anomalous magnetic moment has been measured in a new experiment at Brookhaven. Polarized muons were stored superferric ring, and the angular frequency difference, ${\ensuremath{\omega}}_{a}$, between spin precession orbital frequencies was determined by measuring time distribution of high-energy decay positrons. ratio $R$ ${\ensuremath{\omega}}_{a}$ to Larmor free protons, ${\ensuremath{\omega}}_{p}$, storage-ring field measured. We find...
The spin precession frequency of muons stored in the $(g-2)$ storage ring has been analyzed for evidence Lorentz and CPT violation. Two violation signatures were searched for: a nonzero $\Delta\omega_{a}$ (=$\omega_{a}^{\mu^{+}}-\omega_{a}^{\mu^{-}}$); sidereal variation $\omega_{a}^{\mu^{\pm}}$. No significant effect is found, following limits on standard-model extension parameters are obtained: $b_{Z} =-(1.0 \pm 1.1)\times 10^{-23}$ GeV; $(m_{\mu}d_{Z0}+H_{XY}) = (1.8 6.0 \times 10^{-23})$...
The β decays of 12N and 12B have been studied at KVI JYFL to resolve the composition broad interfering 0+ 2+ strengths in triple-α continuum. For first time a complete treatment 3α decay is presented including all major breakup channels. A multilevel, many-channel R-matrix formalism has developed for description combination with recently published separate analysis angular correlations. We find that, addition Hoyle state 7.65 MeV, more than one needed reproduce spectra. Broad 0+3 2+2 states...
A new measurement of the positive muon's anomalous magnetic moment has been made at Brookhaven Alternating Gradient Synchrotron using direct injection polarized muons into superferric storage ring. The angular frequency difference ${\ensuremath{\omega}}_{a}$ between spin precession ${\ensuremath{\omega}}_{s}$ and orbital ${\ensuremath{\omega}}_{c}$ is measured as well free proton NMR ${\ensuremath{\omega}}_{p}.$ These determine...