Review
Physics, Multidisciplinary
Neelima Agarwal, Lorenzo Magnea, Chiara Signorile-Signorile, Anurag Tripathi
Summary: This review provides a pedagogical overview of the significance of infrared divergences in gauge theory, including historical results, low-order applications, extension tools, and recent developments in high-order multi-particle scattering amplitudes and collider differential distribution calculations.
PHYSICS REPORTS-REVIEW SECTION OF PHYSICS LETTERS
(2023)
Article
Physics, Particles & Fields
Danhua Song, Kai Lou, Ke Wu, Jie Yang
Summary: The YM theory has been generalized to 2YM and 3YM theories, and similarly, the BFYM theory has been generalized to 2BFYM and 3BFYM theories. It is shown that these higher BFYM theories can provide formulations for the corresponding higher form YM theories. Additionally, the gauge symmetries of these higher BFYM theories are also studied.
EUROPEAN PHYSICAL JOURNAL C
(2022)
Article
Physics, Particles & Fields
Marc Steinhauser, Andre Sternbeck, Bjoern Wellegehausen, Andreas Wipf
Summary: This article investigates N = 1 supersymmetric SU(3) Yang-Mills theory with a lattice Wilson Dirac operator, showing that a 45 degrees twist effectively removes the mass splitting of chiral partners and improves continuum extrapolation. The study also suggests that at 45 degrees twist discretization errors for the non-interacting theory are suppressed, which may apply to the interacting theory as well. Additionally, the DD alpha AMG multigrid algorithm significantly accelerates the inversion of the Wilson Dirac operator on a lattice.
JOURNAL OF HIGH ENERGY PHYSICS
(2021)
Article
Physics, Particles & Fields
Yuhma Asano, Jun Nishimura
Summary: This article investigates the dynamics of zero modes in gauge theory and reveals the instability between trivial vacuum and nontrivial vacuum in 4D SU(2) and SU(3) theories through Monte Carlo calculations of Wilson loops and Polyakov lines.
JOURNAL OF HIGH ENERGY PHYSICS
(2023)
Article
Physics, Particles & Fields
Fabian Mueller, Akaki Rusetsky
Summary: Through non-relativistic effective field theory, a three-particle analog of the Lellouch-Luscher formula at the leading order has been derived. This formula establishes a connection between three-particle decay amplitudes in a finite volume and their infinite-volume counterparts, making it applicable for lattice studies on three-particle decays. The potential generalization of this approach to higher orders has also been briefly discussed.
JOURNAL OF HIGH ENERGY PHYSICS
(2021)
Article
Physics, Particles & Fields
Fabian Mueller, Jin-Yi Pang, Akaki Rusetsky, Jia-Jun Wu
Summary: In this paper, a three-particle quantization condition on the lattice is formulated in a manifestly relativistic-invariant form using a generalization of the non-relativistic effective field theory (NREFT) approach. The inclusion of higher partial waves is explicitly addressed, and the quantization condition is partially diagonalized into irreducible representations of the octahedral group in both the center-of-mass frame and moving frames. By generating synthetic data in a toy model, the relativistic invariance of the three-body bound state spectrum is explicitly demonstrated.
JOURNAL OF HIGH ENERGY PHYSICS
(2022)
Article
Multidisciplinary Sciences
Kevissen Sellapillay, Pablo Arrighi, Giuseppe Di Molfetta
Summary: The article introduces a quantum cellular automaton that coincides with 1 + 1QED and demonstrates its accuracy through the limits of the evolution equations.
SCIENTIFIC REPORTS
(2022)
Article
Physics, Particles & Fields
Joseph Karpie, Kostas Orginos, Anatoly Radyushkin, Savvas Zafeiropoulos
Summary: In this study, continuum limit results for the unpolarized parton distribution function of the nucleon in lattice QCD are presented. The pseudo-PDF approach with Short Distance Factorization was utilized for the first time, and findings were compared with phenomenological determinations. The sGEVP technique was employed to optimize control over excited state contamination in calculations.
JOURNAL OF HIGH ENERGY PHYSICS
(2021)
Article
Physics, Particles & Fields
Mariia Anosova, Christof Gattringer, Tin Sulejmanpasic
Summary: In this paper, we study U(1) gauge theories with a modified Villain action and discuss their coupling to electric and magnetic matter as well as the exact electric-magnetic duality. We also show that imposing electric-magnetic duality results in a local, but not ultra-local lattice action.
JOURNAL OF HIGH ENERGY PHYSICS
(2022)
Article
Physics, Particles & Fields
Georg Bergner, David Schaich
Summary: In this study, we investigate the lattice regularization of N = 4 supersymmetric Yang-Mills theory by computing the eigenvalue mode number of the fermion operator stochastically. The results demonstrate convergence towards the expected continuum result under different parameters, while also quantifying the increasing significance of lattice artifacts with larger couplings.
JOURNAL OF HIGH ENERGY PHYSICS
(2021)
Article
Astronomy & Astrophysics
Nolan Miller, Logan Carpenter, Evan Berkowitz, Chia Cheng Chang, Ben Horz, Dean Howarth, Henry Monge-Camacho, Enrico Rinaldi, David A. Brantley, Christopher Korber, Chris Bouchard, M. A. Clark, Arjun Singh Gambhir, Christopher J. Monahan, Amy Nicholson, Pavlos Vranas, Andre Walker-Loud
Summary: The study involves subpercent scale determination using the omega baryon mass and gradient-flow methods. Results show that the dominant uncertainty is stochastic uncertainty, with a clear path towards improved precision in w(0) through the Budapest-Marseille-Wuppertal Collaboration.
Article
Physics, Multidisciplinary
Pablo Arnault, Christopher Cedzich
Summary: In this paper, we propose a real-time lattice gauge theory (LGT) for a spin-1/2 matter field of a single particle on a (1 + 1)-dimensional spacetime lattice. The framework is based on a discrete-time quantum walk, which ensures unitarity and locality, with transition amplitudes vanishing outside of a lightcone on the lattice. We also present a lattice Noether's theorem for internal symmetries of this action and couple it to an electromagnetic field. Furthermore, we suggest a real-time LGT-type action for the electromagnetic field in arbitrary spacetime dimensions, deriving its classical equations of motion as lattice versions of Maxwell's equations.
NEW JOURNAL OF PHYSICS
(2022)
Article
Physics, Multidisciplinary
Yasha Neiman
Summary: We study minimal type-A higher-spin gravity in four dimensions, proposing new diagrammatic rules that involve Fronsdal fields and Didenko-Vasiliev particles. These rules can reproduce all n-point functions of the theory's holographic dual, the free O(N) vector model.
PHYSICAL REVIEW LETTERS
(2023)
Article
Astronomy & Astrophysics
R. Yaron, B. Bazak, M. Schafer, N. Barnea
Summary: Lattice quantum chromodynamics calculations provide a new approach for ab initio predictions in nuclear physics, by extrapolating finite-volume results to free-space physical quantities. We investigated the effect of periodic boundary conditions on the binding energy of light nuclei using the stochastic variational method, and examined the limitations of the Luscher formula for different nuclear systems.
Article
Physics, Particles & Fields
Tyler D. Blanton, Fernando Romero-Lopez, Stephen R. Sharpe
Summary: The study discusses the practical implementation of the formalism related to the finite-volume spectrum of systems of nondegenerate spinless particles, providing theoretical results and codes for implementing the three-particle quantization condition. Various issues, including modifying the cutoff function, decomposing the three-particle amplitude, expanding the threshold, and calculating predictions in chiral perturbation theory, are addressed in the study.
JOURNAL OF HIGH ENERGY PHYSICS
(2022)
Article
Agronomy
Eike Luedeling, Katja Schiffers, Till Fohrmann, Carsten Urbach
Summary: A new dormancy model named PhenoFlex was developed, which combines the Dynamic Model for chill accumulation with the Growing-Degree-Hours model for heat accumulation in a flexible manner. Compared to several benchmark models, PhenoFlex showed superior predictive performance in projecting bloom dates for apples and pears.
AGRICULTURAL AND FOREST METEOROLOGY
(2021)
Article
Astronomy & Astrophysics
Matthias Fischer, Bartosz Kostrzewa, Maxim Mai, Marcus Petschlies, Ferenc Pittler, Martin Ueding, Carsten Urbach, Markus Werner
Summary: In this study, universal parameters of the rho resonance in pi pi-scattering were determined using lattice computation. The mass value was found to be in good agreement with experiment, while the width was slightly higher than expected, after carefully investigating systematic uncertainties.
Article
Physics, Multidisciplinary
Johann Ostmeyer, Christoph Schuermann, Carsten Urbach
Summary: This article explains why flying and rotating flat disks will eventually end up flying with backspin, making them unusable as frisbees. The crucial effect responsible for the flipping is found to be the lift attacking not in the center of mass but slightly offset to the forward edge. Theoretical results are in very good agreement with experimental results, showing that lift-induced torque leads to a precession towards backspin orientation.
EUROPEAN PHYSICAL JOURNAL PLUS
(2021)
Article
Physics, Particles & Fields
Marco Garofalo, Fernando Romero-Lopez, Akaki Rusetsky, Carsten Urbach
Summary: The researchers tested an alternative method to extract the scattering length from lattice simulations in a finite volume, finding that the results were comparable to traditional methods with slightly smaller statistical uncertainties at larger volumes.
EUROPEAN PHYSICAL JOURNAL C
(2021)
Article
Physics, Particles & Fields
Tobias Hartung, Timo Jakobs, Karl Jansen, Johann Ostmeyer, Carsten Urbach
Summary: This work provides a comprehensive analysis of freezing in Monte Carlo simulations at weak couplings for all discrete subgroups of SU(2), and finds that an appropriate choice of the subset allows unfrozen simulations for arbitrary couplings.
EUROPEAN PHYSICAL JOURNAL C
(2022)
Article
Agronomy
Eduardo Fernandez, Katja Schiffers, Carsten Urbach, Eike Luedeling
Summary: This study evaluated the impact of marginal seasons in the calibration data on the predictive power of a phenology model. The results showed that excluding the marginal seasons led to better model performance, highlighting the need for more moderate conditions during model calibration.
AGRICULTURAL AND FOREST METEOROLOGY
(2022)
Review
Physics, Multidisciplinary
Maxim Mai, Ulf -G. Meissner, Carsten Urbach
Summary: In this review, the current understanding of the excited strongly interacting particle spectrum is presented. The systematic and model-independent calculation methods, namely lattice QCD and effective field theories, are discussed. The synergies between these approaches can provide a deeper understanding of the hadron spectrum. The use of the Breit-Wigner parametrization is shown to be inconsistent with chiral symmetry and should be avoided in strongly coupled channels.
PHYSICS REPORTS-REVIEW SECTION OF PHYSICS LETTERS
(2023)
Article
Physics, Particles & Fields
Marco Garofalo, Maxim Mai, Fernando Romero-Lopez, Akaki Rusetsky, Carsten Urbach
Summary: In this study, we investigate the properties of three-body resonances in a lattice complex scalar phi(4) theory with two scalars. Using variational techniques, we determine the two- and three-body spectra for different lattice volumes and analyze them with two different three-particle finite-volume formalisms. We find that both methods provide an equivalent description of the energy levels and are able to fit the spectra using simple parameterizations of the scattering quantities. By solving the integral equations of the corresponding three-particle formalisms, we determine the pole position of the resonance in the complex energy plane and obtain its mass and width. We observe good agreement between the two methods at various coupling values.
JOURNAL OF HIGH ENERGY PHYSICS
(2023)
Article
Astronomy & Astrophysics
C. Alexandrou, S. Bacchio, P. Dimopoulos, J. Finkenrath, R. Frezzotti, G. Gagliardi, M. Garofalo, K. Hadjiyiannakou, B. Kostrzewa, K. Jansen, V. Lubicz, F. Sanfilippo, S. Simula, C. Urbach, U. Wenger
Summary: In this study, we calculate the leading-order hadronic vacuum polarization (HVP) contribution to the muon anomalous magnetic moment in the short and intermediate time-distance windows. The lattice determination is based on the gauge ensembles produced by the Extended Twisted Mass Collaboration (ETMC) with Nf = 2 + 1 + 1 flavors of Wilson-clover twisted-mass quarks. We find consistency with some experimental results in the short-distance window, but deviations in the intermediate window.
Article
Astronomy & Astrophysics
C. Alexandrou, S. Bacchio, M. Constantinou, P. Dimopoulos, J. Finkenrath, R. Frezzotti, K. Hadjiyiannakou, K. Jansen, B. Kostrzewa, G. Koutsou, G. Spanoudes, C. Urbach
Summary: We present the first calculation of the Mellin moments of the transverse quark spin densities in the nucleon using lattice QCD simulations with physical values of the pion mass and in the continuum limit. The densities are extracted from the unpolarized and transversity generalized form factors. The determination confirms a negative and large Boer-Mulders function, h⊥1, in the nucleon, with the isovector tensor anomalous magnetic moment kappa T = 1.051(94).
Article
Astronomy & Astrophysics
C. Alexandrou, S. Bacchio, G. Bergner, M. Constantinou, M. Di Carlo, P. Dimopoulos, J. Finkenrath, E. Fiorenza, R. Frezzotti, M. Garofalo, K. Hadjiyiannakou, B. Kostrzewa, G. Koutsou, K. Jansen, V Lubicz, M. Mangin-Brinet, F. Manigrasso, G. Martinelli, E. Papadiofantous, F. Pittler, G. C. Rossi, F. Sanfilippo, S. Simula, C. Tarantino, A. Todaro, C. Urbach, U. Wenger
Summary: In this study, a calculation of the up, down, strange, and charm quark masses was conducted within the lattice QCD framework using twisted-mass fermion action. Scale setting with various quantities was used to check for finite lattice spacing effects, confirming compatible results in the continuum limit. Nonperturbative quark mass renormalization was performed using the RI'-MOM method, with determination of quark masses based on physical observables from the meson and baryon sectors.
Article
Materials Science, Multidisciplinary
Manuel Schneider, Johann Ostmeyer, Karl Jansen, Thomas Luu, Carsten Urbach
Summary: Tensor networks are a powerful tool for simulating various physical models, overcoming sign problems in Monte Carlo simulations. Using imaginary-time evolution, accurate estimators for ground states of models like the Hubbard model have been provided. A method to directly simulate the subspace with an odd number of fermions has also been presented.
Article
Astronomy & Astrophysics
C. Alexandrou, S. Bacchio, G. Bergner, P. Dimopoulos, J. Finkenrath, R. Frezzotti, M. Garofalo, B. Kostrzewa, G. Koutsou, P. Labus, F. Sanfilippo, S. Simula, M. Ueding, C. Urbach, U. Wenger
Summary: This study presents a determination of the ratio of kaon and pion leptonic decay constants in isosymmetric QCD (ISOQCD), obtaining a result of 1.1995, and discusses the implications for the Cabibbo-Kobayashi-Maskawa matrix element |V-us| and for the first-row Cabibbo-Kobayashi-Maskawa unitarity.
Article
Materials Science, Multidisciplinary
Johann Ostmeyer, Evan Berkowitz, Stefan Krieg, Timo A. Laehde, Thomas Luu, Carsten Urbach
Summary: In this study, a comprehensive analysis of the operators contributing to the structure factors and order parameters of the hexagonal Hubbard Model was conducted using the Hybrid Monte Carlo algorithm. The results improve the consistency of Monte Carlo determinations of critical exponents and provide insights into the semimetal-Mott insulator transition in the hexagonal Hubbard Model. The methods employed are applicable to a wide range of lattice theories involving strongly correlated electrons.
Article
Astronomy & Astrophysics
C. Alexandrou, S. Bacchio, M. Constantinou, P. Dimopoulos, J. Finkenrath, K. Hadjiyiannakou, K. Jansen, G. Koutsou, B. Kostrzewa, T. Leontiou, C. Urbach
Summary: The nucleon axial and induced pseudoscalar form factors are computed using three ensembles of gauge configurations, one of which includes strange and charm quarks. The latter ensemble with finer lattice spacing and larger statistics is used for final results, while the other two are used to assess volume effects. The momentum dependence of these form factors and their relations based on pion pole dominance and the partially conserved axial-vector current hypothesis are examined.
