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
Simon Woodward, Paul M. Saffin, Zong-Gang Mou, Anders Tranberg
Summary: In this paper, we apply the Generalised Thimble approach to compute exact path integrals and correlators in real-time quantum field theory. We investigate the numerical implementation and algorithm optimization in detail, and then apply the method to an interacting two-field system in 0+1 dimensions, demonstrating the potential of using real-time Generalised Thimble computations to address realistic physical processes.
JOURNAL OF HIGH ENERGY PHYSICS
(2022)
Article
Physics, Particles & Fields
Daniel Grimmer, Irene Melgarejo-Lermas, Jose Polo-Gomez, Eduardo Martin-Martinez
Summary: We demonstrate the use of machine learning techniques to overcome the challenges of designing experiments and interpreting the outcomes of quantum field measurements. Local measurements of quantum fields can reveal global features due to the local storage of global information in a scrambled way. By training neural networks, we can unscramble this information from data generated by a simple local measurement protocol. The framework proposed here can be applied to various local measurements on a quantum field to reveal its global properties in a standardized manner.
JOURNAL OF HIGH ENERGY PHYSICS
(2023)
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
Physics, Particles & Fields
Santanu Mondal, Rajan Gupta, Sungwoo Park, Boram Yoon, Tanmoy Bhattacharya, Balint Joo, Frank Winter
Summary: By analyzing high-statistics data, better control over the systematic uncertainties in the calculation of the isovector momentum fraction, helicity moment, and transversity moment of the nucleon is achieved. The results for these moments are consistent with global fit values.
JOURNAL OF HIGH ENERGY PHYSICS
(2021)
Article
Physics, Particles & Fields
Sinead M. Ryan, David J. Wilson
Summary: Excited and exotic bottomonia spectrum were explored using lattice QCD, identifying highly excited states and supermultiplets corresponding to the quark model. Exotic spin-parity-charge-conjugation quantum numbers that cannot be formed from quark pairs alone were also identified. Single-meson operator constructions with good J(PC) in the continuum were used, with assigned continuum J(PC) for each level based on lattice irreps and dominant operator overlaps. States with dominant gluonic components were identified, forming a hybrid supermultiplet with specific J(PC) values approximately 1500 MeV above the ground-state eta(b), similar to previous computations with different quark systems.
JOURNAL OF HIGH ENERGY PHYSICS
(2021)
Article
Physics, Particles & Fields
Fernando Romero-Lopez, Akaki Rusetsky, Nikolas Schlage, Carsten Urbach
Summary: The paper presents a general method for deriving the energy shift of an interacting system of N spinless particles using nonrelativistic effective field theory, with relativistic corrections explicitly included. This method is applied to obtain the ground state of N particles and the first excited state of two and three particles to a certain order, based on the threshold parameters of relativistic scattering amplitudes. The resulting expressions are used to analyze the N-particle ground state energy shift in the complex phi (4) theory.
JOURNAL OF HIGH ENERGY PHYSICS
(2021)
Article
Physics, Particles & Fields
Andrey Yu Kotov, Daniel Nogradi, Kalman K. Szabo, Lorinc Szikszai
Summary: In this study, we continue to investigate the dependence on the number of fermions by extending simulations to N-f = 7, 8, 9, 10. We also examine the N-f dependence of finite volume effects and a specific lattice artifact phase related to staggered fermions.
JOURNAL OF HIGH ENERGY PHYSICS
(2021)
Article
Physics, Particles & Fields
Luke Gayer, Nicolas Lang, Sinead M. Ryan, David Tims, Christopher E. Thomas, David J. Wilson
Summary: The scattering amplitudes of isospin-1/2 D pi are computed using lattice QCD, revealing a D-0* resonance pole strongly coupled to the S-wave D pi channel. This resonant state has a mass of approximately 2200 MeV and a width of around 400 MeV, consistently found below the mass of the D-s0*.
JOURNAL OF HIGH ENERGY PHYSICS
(2021)
Article
Physics, Particles & Fields
B. B. Brandt, F. Cuteri, G. Endroedi, G. Marko, L. Sandbote, A. D. M. Valois
Summary: This work investigates the influence of magnetic fields on QCD medium in off-central heavy-ion collisions. By simulating the behavior of quarks in inhomogeneous magnetic fields, it is found that the magnetic field leads to non-trivial spatial features in the QCD medium, especially around the transition temperature. In addition, a leading-order chiral perturbation theory for the inhomogeneous background is constructed and compared with lattice results at low temperature.
JOURNAL OF HIGH ENERGY PHYSICS
(2023)
Article
Physics, Particles & Fields
Adriano Di Giacomo
Summary: In this paper, a new order parameter for monopole condensation in gauge theory vacuum is introduced, which is gauge-invariant and free of infrared problems. Calculating this new parameter on the lattice can definitively determine if dual superconductivity is the mechanism for color confinement. Additionally, the existence of a finite correlation length in the gauge-invariant correlator of chromo-electric field strengths is found to be related to confinement.
JOURNAL OF HIGH ENERGY PHYSICS
(2021)
Article
Physics, Particles & Fields
Miguel Correia, Joao Penedones, Antoine Vuignier
Summary: This article presents a dual setup in 2 space-time dimensions that combines scattering amplitudes of massive particles and matrix elements of local operators. By utilizing the stress energy tensor, it is possible to impose UV constraints on IR observables using the central charge cUV of the UV Conformal Field Theory. Two applications are considered, including establishing a lower bound on cUV for Z(2) symmetric scalar theories in the IR and studying Ising Field Theory under different magnetic fields and cubic couplings for fixed cUV = 1/2.
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
Physics, Particles & Fields
Francesca Cuteri, Owe Philipsen, Alessandro Sciarra
Summary: The study investigates the nature of the QCD chiral phase transition using unimproved staggered fermions, identifying the chiral critical surface and utilizing tricritical scaling to extrapolate to the chiral limit. Initial evidence suggests a second-order chiral transition in massless theories with N-f<=6. A reanalysis of existing data also supports tricritical scaling and the transition to second-order in approaching the continuum chiral limit.
JOURNAL OF HIGH ENERGY PHYSICS
(2021)
Article
Physics, Multidisciplinary
E. V. Luschevskaya, O. A. Kochetkov, O. V. Teryaev, O. E. Solovjeva
Article
Physics, Particles & Fields
E. V. Luschevskaya, O. E. Solovjeva, O. A. Kochetkov, O. V. Teryaev
Article
Astronomy & Astrophysics
E. V. Luschevskaya, O. E. Solovjeva, O. V. Teryaev
Article
Physics, Particles & Fields
M. A. Andreichikov, B. O. Kerbikov, E. V. Luschevskaya, Yu. A. Simonov, O. E. Solovjeva
JOURNAL OF HIGH ENERGY PHYSICS
(2017)
Article
Physics, Particles & Fields
E. V. Luschevskaya, O. V. Teryaev, D. Yu. Golubkov, O. V. Solovjeva, R. A. Ishkuvatov
JOURNAL OF HIGH ENERGY PHYSICS
(2018)
Article
Physics, Multidisciplinary
Olga Soloveva, Pierre Moreau, Elena Bratkovskaya
Summary: This review examines the transport properties of strongly interacting quark-gluon plasma in heavy-ion collisions, comparing out-of equilibrium and equilibrium states. By studying transport coefficients in relation to temperature and baryon chemical potential, the authors discuss observables sensitive to the formation and properties of the QGP.
Article
Astronomy & Astrophysics
Taesoo Song, Ilia Grishmanovskii, Olga Soloveva
Summary: This study applies Low's theorem to investigate soft gluon emission from heavy quark scattering in the nonperturbative strongly interacting quark-gluon plasma (sQGP). The sQGP is described using dynamic quasiparticles and adjusted to match the equation of state from lattice QCD at finite temperature and chemical potential. By considering only the emission from incoming and outgoing partons due to the soft and long-wavelength gluon, the detailed structure of the scattering is not required. This simplifies the calculations by factorizing the scattering amplitude into elastic scattering and emission of soft gluon. By imposing an upper limit on the emitted gluon energy, the gauge-invariant scattering cross sections of heavy quarks with the massive partons of the medium and their transport coefficients in the QGP can be obtained and compared with those from elastic scattering without gluon emission.
Article
Physics, Nuclear
Ilia Grishmanovskii, Taesoo Song, Olga Soloveva, Carsten Greiner, Elena Bratkovskaya
Summary: This article focuses on the interaction of leading jet partons in a strongly interacting quark-gluon plasma medium, investigating the dependence of jet transport coefficients on temperature, baryon chemical potential, and jet properties. The results are compared with other theoretical approaches and estimates.
Article
Astronomy & Astrophysics
Olga Soloveva, Jorg Aichelin, Elena Bratkovskaya
Summary: In this study, we extended the dynamical quasiparticle model (DQPM) to describe the nonperturbative QCD phenomena of the strongly interacting quark-gluon plasma (QGP) with large baryon chemical potentials, including a critical endpoint and a first-order phase transition. The complex self-energies of partonic degrees of freedom at zero and finite baryon chemical potentials were determined by adjusting the entropy density to lattice QCD data.
Article
Astronomy & Astrophysics
Jan A. Fotakis, Olga Soloveva, Carsten Greiner, Olaf Kaczmarek, Elena Bratkovskaya
Summary: This study evaluates the diffusion properties of the strongly interacting quark-gluon plasma (sQGP) using the dynamical quasiparticle model (DQPM), examining the diffusion coefficient matrix for baryon, strange, and electric charges. The calculation is based on two methods - the Chapman-Enskog method and the relaxation time approximation (RTA) - and shows good agreement with available lattice QCD data for electric charge diffusion coefficient at vanishing baryon chemical potential. The knowledge of diffusion coefficient matrix is important for more accurate hydrodynamic simulations.
Article
Physics, Nuclear
Olga Soloveva, David Fuseau, Jorg Aichelin, Elena Bratkovskaya
Summary: In this study, we calculated transport coefficients for strongly interacting quark matter in the extended PNJL model. We found that the shear viscosity over entropy ratio and the ratio of electric conductivity to temperature exhibited similar temperature and chemical potential behaviors when approaching the chiral phase transition. However, the differences between the two methods of calculation increased with temperature.
Article
Physics, Nuclear
Olga Soloveva, Pierre Moreau, Elena Bratkovskaya
Article
Physics, Nuclear
Pierre Moreau, Olga Soloveva, Lucia Oliva, Taesoo Song, Wolfgang Cassing, Elena Bratkovskaya
Article
Astronomy & Astrophysics
O. Soloveva, P. Moreau, L. Oliva, V. Voronyuk, V. Kireyeu, T. Song, E. Bratkovskaya
