116 citations · 539 across the 21 of their papers we have counts for
13 papers · 1 filter
Competitive constraints on exotic tensor currents from ratios
Victor Dumenil, Leendert Hayen
We introduce the ratio of electron capture to positron decay rates of unstable nuclei as a probe for exotic tensor currents in the electroweak sector. We calculate nuclear structur…
Recoil spectroscopy as a Beyond Standard Model laboratory
Leendert Hayen
We consider the nuclear recoil spectrum following allowed decay as a laboratory for Beyond Standard Model searches, and perform an exhaustive treatment of the Standard Model pr…
The form factor expansion in the precision decay era
Leendert Hayen
Precision tests of the Standard Model using decay have always relied on a careful choice of transition to minimize residual nuclear structure uncertainties. Following breakthro…
Impact of reactor neutrino uncertainties on coherent scattering's discovery potential
Leendert Hayen
Nuclear power reactors are the most intense man-made source of antineutrino's and have long been recognized as promising sources for coherent elastic neutrino-nucleus scattering (C…
Opportunities and open questions in modern decay
Leendert Hayen
For well over half a century, precision studies of neutron and nuclear decays have been at the forefront of searches for exotic electroweak physics. Recent advances in nuclear…
Ab initio calculation of the decay spectrum of He
Garrett B. King, Alessandro Baroni, Vincenzo Cirigliano +5
We calculate the spectrum in the decay of He using Quantum Monte Carlo methods with nuclear interactions derived from chiral Effective Field Theory and consistent weak vect…
Consistent description of angular correlations in decay for Beyond Standard Model physics searches
Leendert Hayen, Albert R. Young
Measurements of angular correlations between initial and final particles in decay remain one of the most promising ways of probing the Standard Model and looking for new physic…
Detailed spectrum calculations of Pb for new physics searches in liquid Xenon
Leendert Hayen, Stefano Simonucci, Simone Taioli
We present a critical assessment of the calculation and uncertainty of the Pb Bi ground state to ground state decay, the dominant source of background in…
First-forbidden transitions in the reactor anomaly
Leendert Hayen, Joel Kostensalo, Nathal Severijns +1
We describe here microscopic calculations performed on the dominant forbidden transitions in reactor antineutrino spectra above 4 MeV using the nuclear shell model. By taking into…
Radiative corrections to Gamow-Teller decays
Leendert Hayen, Nathal Severijns
Radiative corrections in the electroweak sector constitute an essential component in the ability to disentangle Beyond Standard Model physics from experimental data. This is partic…
First-forbidden transitions in the reactor anomaly
L. Hayen, J. Kostensalo, N. Severijns +1
We study the dominant forbidden transitions in the antineutrino spectra of the fission actinides from 4 MeV onward using the nuclear shell model. Through explicit calculation of th…
Beta Spectrum Generator: High precision allowed spectrum shapes
Leendert Hayen, Nathal Severijns
Several searches for Beyond Standard Model physics rely on an accurate and highly precise theoretical description of the allowed spectrum. Following recent theoretical advances…
High precision analytical description of the allowed spectrum shape
Leendert Hayen, Nathal Severijns, Kazimierz Bodek +2
A fully analytical description of the allowed spectrum shape is given in view of ongoing and planned measurements. Its study forms an invaluable tool in the search for physics…