88 citations · 633 across the 23 of their papers we have counts for
23 papers
Concurrent tests of Lorentz invariance in -decay experiments
K. K. Vos, H. W. Wilschut, R. G. E. Timmermans
Modern experiments on neutron and allowed nuclear decay search for new semileptonic interactions, beyond the ``left-handed'' electroweak force. We show that ongoing and planned…
Symmetry violations in nuclear and neutron decay
K. K. Vos, H. W. Wilschut, R. G. E. Timmermans
The role of decay as a low-energy probe of physics beyond the Standard Model is reviewed. Traditional searches for deviations from the Standard Model structure of the weak inte…
Question of Lorentz invariance in muon decay
J. P. Noordmans, C. J. G. Onderwater, H. W. Wilschut +1
Possibilities to test the Lorentz invariance of the weak interaction in muon decay are considered. We derive the direction-dependent muon-decay rate with a general Lorentz-violatin…
Exploration of Lorentz violation in neutral-kaon decay
K. K. Vos, J. P. Noordmans, H. W. Wilschut +1
The KLOE collaboration recently reported bounds on the directional dependence of the lifetime of the short-lived neutral kaon with respect to the dipole anisotropy of the c…
First Test of Lorentz Invariance in the Weak Decay of Polarized Nuclei
S. E. Müller, E. A. Dijck, H. Bekker +17
A new test of Lorentz invariance in the weak interactions has been made by searching for variations in the decay rate of spin-polarized 20Na nuclei. This test is unique to Gamow-Te…
Limits on Lorentz violation in neutral-Kaon decay
K. K. Vos, H. W. Wilschut, R. G. E. Timmermans
The KLOE collaboration recently reported bounds on the directional dependence of the lifetime of the short-lived neutral kaon K_S with respect to the cosmic microwave background di…
Limits on Lorentz violation from forbidden beta decays
J. P. Noordmans, H. W. Wilschut, R. G. E. Timmermans
Forbidden (slow) beta decays offer new opportunities to test the invariance of the weak interaction under Lorentz transformations. Within a general effective field theory framework…
Nuclear beta decay with Lorentz violation
J. P. Noordmans, H. W. Wilschut, R. G. E. Timmermans
We consider the possibility of Lorentz-invariance violation in weak-decay processes. We present a general approach that entails modifying the W-boson propagator by adding a Lorentz…
Polarization observables in low-energy antiproton-proton scattering
Daren Zhou, Rob G. E. Timmermans
We investigate the polarization parameters in low-energy antiproton-proton elastic () and charge-exchange () scattering. T…
A new approach to test Lorentz invariance
H. W. Wilschut, E. A. Dijck, S. Hoekstra +9
Lorentz invariance in the weak interaction has been tested rather poorly compared to the electromagnetic interaction. In this work we show which tests on the weak interaction shoul…
Lorentz violation in neutron and allowed nuclear beta decay
J. P. Noordmans, H. W. Wilschut, R. G. E. Timmermans
We explore the possibility that the weak interaction violates Lorentz, and in particular rotational, invariance in neutron and allowed nuclear beta decay. A broad class of Lorentz-…
Isotope Shifts of the D - P Transition in Trapped Short-Lived Ra
G. S. Giri, O. O. Versolato, J. E. van den Berg +13
Laser spectroscopy of short-lived radium isotopes in a linear Paul trap has been performed. The isotope shifts of the D - P transition in $^{209…
Parity- and Time-Reversal-Violating Form Factors of the Deuteron
J. de Vries, E. Mereghetti, R. G. E. Timmermans +1
We calculate the electric-dipole and magnetic-quadrupole form factors of the deuteron that arise as a low-energy manifestation of parity and time-reversal violation in quark-gluon…
The Nucleon Electric Dipole Form Factor From Dimension-Six Time-Reversal Violation
J. de Vries, E. Mereghetti, R. G. E. Timmermans +1
We calculate the electric dipole form factor of the nucleon that arises as a low-energy manifestation of time-reversal violation in quark-gluon interactions of effective dimension…
On-line Excited-State Laser Spectroscopy of Trapped Short-Lived Ra Ions
O. O. Versolato, G. S. Giri, L. W. Wansbeek +11
As an important step towards an atomic parity violation experiment in one single trapped Ra ion, laser spectroscopy experiments were performed with on-line produced short-lived…
Comparative studies of dipole polarizabilities in Sr, Ba and Ra and their applications to optical clocks
B. K. Sahoo, R. G. E. Timmermans, B. P. Das +1
Static dipole polarizabilities are calculated in the ground and metastable states of Sr, Ba and Ra using the relativistic coupled-cluster method. Trends of the electron…
Ab initio determination of polarizabilities and van der Waals coefficients of Li atoms using the relativistic CCSD(T) method
L. W. Wansbeek, B. K. Sahoo, R. G. E. Timmermans +2
We report a new technique to determine the van der Waals coeffcients of lithium (Li) atoms based on the relativistic coupled-cluster theory. These quantities are determined using t…
Investigations of Ra properties to test possibilities of new optical frequency standards
B. K. Sahoo, B. P. Das, R. K. Chaudhuri +3
The present work tests the suitability of the narrow transitions and in Ra for optical frequency standard stud…
- and -odd two-nucleon interaction and the deuteron electric dipole moment
C. -P. Liu, R. G. E. Timmermans
The nuclear physics relevant to the electric dipole moment (EDM) of the deuteron is addressed. The general operator structure of the - and -odd nucleon-nucleon interaction is…
The Nucleon-Mass Difference in Chiral Perturbation Theory and Nuclear Forces
J. L. Friar, U. van Kolck, M. C. M. Rentmeester +1
A new method is developed for treating the effect of the neutron-proton mass difference in isospin-violating nuclear forces. Previous treatments utilized an awkward subtraction sch…
The --emission puzzle in He decay
B. F. Gibson, R. G. E. Timmermans
We re-examine the puzzling emission from the weak decay of He and propose an explanation in terms of a three-body decay of the virtual . Such a resolution of the $…
Comment on ``Validity of certain soft-photon amplitudes''
M. K. Liou, R. Timmermans, B. F. Gibson +1
The criteria suggested by Welsh and Fearing (nucl-th/9606040) to judge the validity of certain soft-photon amplitudes are examined. We comment on aspects of their analysis which le…
The Pauli principle in the soft-photon approach to proton-proton bremstrahlung
M. K. Liou, R. Timmermans, B. F. Gibson
A relativistic and manifestly gauge-invariant soft-photon amplitude, which is consistent with the soft-photon theorem and satisfies the Pauli Principle, is derived for the proton-p…