539 citations · 971 across the 40 of their papers we have counts for
42 papers
Investigation of the ensemble of maximal center gauge
Zeinab Dehghan, Rudolf Golubich, Roman Höllwieser +1
Maximal Center Gauge (MCG) aims to detect center vortices by maximizing a gauge functional and then projecting onto the center elements of the respective group. The requirement for…
Heavy Wilson Quarks and O() Improvement: Nonperturbative Results for
Mattia Dalla Brida, Roman Höllwieser, Francesco Knechtli +3
With Wilson quarks, on-shell O() improvement of the lattice QCD action is achieved by including the Sheikholeslami-Wohlert term and two further operators of mass dimension 5, wh…
Charmonium spectroscopy with optimal distillation profiles
Juan Andrés Urrea-Niño, Jacob Finkenrath, Roman Höllwieser +3
We use the method of optimal distillation profiles to compute the low-lying charmonium spectrum in an ensemble at the light flavor symmetric point ($m_π \approx…
Optimized Distillation Profiles for Heavy-Light Spectroscopy
Jan Neuendorf, Giulia Egbring, Jochen Heitger +4
It has been demonstrated that distillation profiles can be employed to build optimized quarkonium interpolators for spectroscopy calculations in lattice QCD. We test their usefulne…
A non-perturbative determination of
Mattia Dalla Brida, Roman Höllwieser, Francesco Knechtli +4
Close to the continuum limit, lattice QCD with mass-degenerate Wilson quarks can be described by Symanzik's effective continuum action, which contains the dimension 5 operator, $m\…
Spatial distribution of ultracold neutron probability density in the gravitational field of the earth above a mirror
Derar Altarawneh, Roman Höllwieser, Markus Wellenzohn
We propose a theoretical analysis of the experimental data by Ichikawa et al. (Phys. Rev. Lett. 112, 071101 (2014)) on a spatial distribution of ultracold neutrons in the gravitati…
Neutron beta decay and exact conservation of charged weak hadronic vector current in the Standard Model
Derar Altarawneh, Roman Höllwieser, Markus Wellenzohn
We investigate a reliability of the hypothesis of exact conservation of the charged weak hadronic vector current in the neutron -decay with polarized neutron and unpolarized p…
Hybrid static potentials from Laplacian Eigenmodes
Roman Höllwieser, Francesco Knechtli, Tomasz Korzec +2
We present a method for computing hybrid static quark-antiquark potentials in lattice QCD based on Laplace trial states. They are formed by eigenvector components of the covariant…
A first analysis of the ensemble of local maxima of maximal center gauge
Zeinab Dehghan, Rudolf Golubich, Roman Höllwieser +1
Maximal center gauge (MCG) aims to detect some of the most important vacuum configurations, suggesting thick magnetic flux tubes quantised to non-trivial center elements of the gau…
Constructing static quark-anti-quark creation operators from Laplacian eigenmodes
Roman Höllwieser, Francesco Knechtli, Tomasz Korzec +2
We investigate static quark anti-quark operators based on trial states formed from eigenvectors of the covariant three-dimensional lattice Laplace operator. We test the method by c…
Determination of by the non-perturbative decoupling method
Mattia Dalla Brida, Roman Höllwieser, Francesco Knechtli +5
We present the details and first results of a new strategy for the determination of . By simultaneously decoupling 3 fictitious heavy quarks we establish a relation betwe…
The static energy of a quark-antiquark pair from Laplacian eigenmodes
Roman Höllwieser, Francesco Knechtli, Mike Peardon
We test a method for computing the static quark-antiquark potential in lattice QCD, which is not based on Wilson loops, but where the trial states are formed by eigenvector compone…
Corrections of order O(E^2_e/m^2_N), caused by weak magnetism and proton recoil, to the neutron lifetime and correlation coefficients of the neutron beta decay
A. N. Ivanov, R. Höllwieser, N. I. Troitskaya +2
We calculate the contributions of weak magnetism and proton recoil of order O(E^2_e/m^2_N)~10^{-5}, i.e. to next-to-next-to-leading order in the large nucleon mass expansion, to th…
Energy of a point-like neutron in an external electromagnetic field
Jesus Saenz, Michael Engelhardt, Roman Höllwieser
A point-like neutron in an external electromagnetic field experiences a shift in energy that mimicks the effect of an actual structural deformation of an extended neutron, i.e., a…
Radiative corrections of order O(alpha E_e/m_N) to Sirlin's radiative corrections of order O(alpha/pi) to neutron lifetime
A. N. Ivanov, R. Höllwieser, N. I. Troitskaya +2
We calculate the radiative corrections of order O(alpha E_e/m_N) as next-to-leading order corrections in the large nucleon mass expansion to Sirlin's radiative corrections of order…
Electrodisintegration of Deuteron into Dark Matter and Proton Close to Threshold
A. N. Ivanov, R. Höllwieser, N. I. Troitskaya +2
We discuss an investigation of the dark matter decay modes of the neutron, proposed by Fornal and Grinstein (Phys. Rev. Lett. 120 191801 (2018)) and Ivanov et al. ( arXiv:1806.1010…
Preliminary QCD phase transition line for 695 MeV dynamical staggered fermions from effective Polyakov line actions
Roman Höllwieser, Jeff Greensite
We present a phase diagram for SU(3) lattice gauge theory with 695 MeV dynamical staggered fermions, in the plane of temperature and chemical potential, obtained from effective Pol…
A finite-density transition line for QCD with 695 MeV dynamical fermions
Jeff Greensite, Roman Höllwieser
We apply the relative weights method to SU(3) gauge theory with staggered fermions of mass 695 MeV at a set of temperatures in the range MeV, to obtain an effec…
Precision analysis of electron energy spectrum and angular distribution of neutron beta decay with polarized neutron and electron
A. N. Ivanov, R. Höllwieser, N. I. Troitskaya +2
We give a precision analysis of the correlation coefficients of the electron-energy spectrum and angular distribution of the beta decay and radiative beta decay of the neutron with…
Precision Theoretical Analysis of Neutron Radiative Beta Decay
A. N. Ivanov, R. Höllwieser, N. I. Troitskaya +2
In the Standard Model of electroweak interactions and in the tree--approximation we calculate the rate and branching ratio of the neutron radiative beta decay with one-real photon…
Polyakov line actions from SU(3) lattice gauge theory with dynamical fermions via relative weights
Roman Höllwieser, Jeff Greensite
We extract an effective Polyakov line action from an underlying SU(3) lattice gauge theory with dynamical fermions via the relative weights method. The center-symmetry breaking ter…
Relative weights approach to dynamical fermions at finite densities
Jeff Greensite, Roman Höllwieser
The method of relative weights, coupled with mean field theory, is applied to the problem of simulating gauge theories with dynamical staggered fermions at finite densities. We pre…
A model of random center vortex lines in continuous 2+1-dimensional space-time
Derar Altarawneh, Michael Engelhardt, Roman Höllwieser
A picture of confinement in QCD based on a condensate of thick vortices with fluxes in the center of the gauge group (center vortices) is studied. Previous concrete model realizati…
Exact Solution for Chameleon Field, Self-Coupled Through the Ratra-Peebles Potential with n = 1 and Confined Between Two Parallel Plates
A. N. Ivanov, G. Cronenberg, R. Höllwieser +4
We calculate the chameleon field profile, confined between two parallel plates, filled with air at pressure and room temperature and separated by the dist…