Article
Astronomy & Astrophysics
Alfonso Ballon-Bayona, Luis A. H. Mamani, Alex S. Miranda, Vilson T. Zanchin
Summary: This work investigates a finite-temperature extension of the effective holographic models for QCD (EHQCD), finding black hole solutions categorized into large and small black holes at temperatures above a certain temperature T-min. Thermodynamic quantities and viscosity coefficients are shown to be sensitive to model parameters, with the bulk viscosity ratio zeta/s displaying rapid growth near T-min. Comparison with lattice SU(N-C) results and JETSCAPE Collaboration results on heavy ion collisions show compatibility with appropriate fixes of the coupling as a function of the conformal dimension.
Article
Astronomy & Astrophysics
Fabio Siringo, Giorgio Comitini
Summary: One-loop explicit expressions for the gluon Nielsen identity in the screened massive expansion formalism for Yang-Mills theory are derived. The gauge-parameter-independence of the poles and residues is discussed in both a strict perturbative context and extended resummation schemes. Although no exact formal proof was reached by the approximate resummation schemes, some evidence is gathered in favor of an exact invariance of the phase, consistent with previous numerical studies.
Article
Astronomy & Astrophysics
Fabio Siringo
Summary: This article provides a general formal derivation of the screened massive expansion using Schwinger-Dyson equations. It clarifies some known issues of the expansion and establishes a more general framework for extending the method to two loops or amplitudes not directly defined by a generating functional. For example, it presents a one-loop screened expansion for the effective gauge-parameter-independent gluon propagator derived from the pinch technique.
Article
Physics, Multidisciplinary
Haresh Raval
Summary: The study investigates the infrared regime of the new quadratic gauge effective theory in the physical compact space defined on a 4-sphere. Abelian dominance is observed with off-diagonal gluons acquiring mass that is position dependent due to the curved geometry of the 4-sphere. The effective action in the confined phase on the 4-sphere is found to be equivalent to that in 4-dimensional Euclidean space.
Article
Physics, Multidisciplinary
Marcello Miranda, Pierre-Antoine Graham, Valerio Faraoni
Summary: In this paper, we apply the effective fluid analysis to tensor-multi-scalar gravity by representing the gravitational scalar field as a dissipative effective fluid. This generalization poses new challenges as the effective fluid becomes a complicated mixture of mutually coupled individual fluids, with different possible reference frames for its description. Two of these frames are highlighted, and their implications for cosmology are discussed.
EUROPEAN PHYSICAL JOURNAL PLUS
(2023)
Article
Astronomy & Astrophysics
Daiki Suenaga, Masakiyo Kitazawa
Summary: In this study, we investigate the phase diagram and thermodynamics of SU(N) pure Yang-Mills theory on a manifold T2 x R2 using an effective model that includes two Polyakov loops along two compactified directions. It is found that a rich phase structure can appear due to the spontaneous breaking of two center symmetries for N = 2 and 3. Thermodynamic quantities are obtained in the model and compared with recent lattice results, showing that the two Polyakov loops play significant roles in the thermodynamics on T2 x R2.
Article
Mathematics, Applied
Ling-Zheng Meng, Yan-Hong Qin, Li-Chen Zhao
Summary: This paper investigates the properties and motion of vector solitons in Bose-Einstein condensates, exploring the nonintegrable cases of spin soliton solutions and their stability. The results show that these spin solitons are robust against spin-dependent interactions and noise, exhibiting features such as negative-positive mass transition, splitting, diffusion, and collisions.
COMMUNICATIONS IN NONLINEAR SCIENCE AND NUMERICAL SIMULATION
(2022)
Article
Physics, Multidisciplinary
Urko Reinosa, Julien Serreau, Rodrigo Carmo Terin, Matthieu Tissier
Summary: By summing over all Gribov copies with some weight function, we propose a gauge-fixing procedure that overcomes the Gribov ambiguity in the Landau gauge. This approach involves a local field theory with constrained, nonlinear sigma model fields. A phenomenon of radiative symmetry restoration occurs in this theory, leading to a nonzero gluon screening mass as observed in lattice simulations.
Article
Chemistry, Multidisciplinary
Silky Bedi, Gaurav Kumar, S. M. Rose, Sabyasachi Rakshit, Sharmistha Sinha
Summary: This study explores a method of confining protein-metal nanocomposites within barrier-free condensates and finds that this confinement can amplify the catalytic efficiency of metal nanocatalysts.
CHEMICAL COMMUNICATIONS
(2022)
Article
Astronomy & Astrophysics
Hua-Xing Chen, Wei Chen, Shi-Lin Zhu
Summary: The study suggests the potential nonexistence of ground-state spin-1 glueballs of C = +, and proposes searching for J(PC) = 0(-+)/2(-+/-)/3(+--) three-gluon glueballs in their three-meson decay channels in future experiments.
Article
Mechanics
Yuchen Li, Noel Challamel, Isaac Elishakoff
Summary: This paper investigates the dynamic behavior of a metamaterial lattice composed of concentrated masses coupled with local resonators. The effective mass and stiffness of the lattice are calculated for finite and infinite systems, and the results are compared with eigenfrequencies and wave dispersion. It is found that the effective mass is proportional to the square of the frequency associated with each branch, and the effective mass for the optical branch is significantly reduced. Nonlocal continuous approaches are also developed to approximate the lattice response. A design-oriented methodology for calibrating the effective mass is proposed.
ARCHIVE OF APPLIED MECHANICS
(2023)
Article
Astronomy & Astrophysics
Alexandr V. Pimikov
Summary: This article presents a method for expanding nonlocal gluon condensates and discusses their application in the background field approach. It also calculates additional contributions to glueball current correlators.
Review
Chemistry, Multidisciplinary
Kevin Rhine, Hana M. Odeh, James Shorter, Sua Myong
Summary: Biomolecular condensates are reversible compartments formed through phase separation, which can be nucleated by post-translational modifications like ADP-ribosylation. Poly(ADP-ribose) (PAR) chains, transient modifications with short turnover rates, play a crucial role in granule formation and are associated with neurodegenerative diseases. This review explores the synthesis, regulation, structure, chemistry, and protein interactions of PAR, as well as recent progress in understanding its role in phase separation and potential as a target for neurodegenerative disease treatments.
Article
Astronomy & Astrophysics
Bruno El-Bennich, German Ramos-Zambrano, Eduardo Rojas
Summary: The research proposes a model for the massive gluon propagator that accurately reproduces mass and weak decay constants of pi, K, and eta(c) in excellent agreement with experimental values, while reasonably describing D and D-s. The simplicity of this effective interaction has the potential for useful phenomenological applications and calculations in Minkowski space.
Article
Oncology
Ann Boija, Isaac A. Klein, Richard A. Young
Summary: Biomolecular condensates, membraneless bodies formed by liquid-liquid phase separation, compartmentalize specific proteins and RNA molecules. Recent studies have revealed their potential roles in oncogenesis and influence on cancer therapeutics.
Article
Physics, Particles & Fields
A. C. Aguilar, M. N. Ferreira, J. Papavassiliou
Summary: A novel method for computing the nonperturbative kinetic term of the gluon propagator is presented, where the regular part of the three-gluon vertex and the kinetic term are related by a partial Slavnov-Taylor identity. The main ingredients of the solution include the projection of the three-gluon vertex and a specific derivative of the ghost-gluon kernel, with the initial condition determined by the requirement of a pole-free answer calculated from an integral with the same ingredients as the solution.
EUROPEAN PHYSICAL JOURNAL C
(2021)
Article
Physics, Multidisciplinary
B. Acharya, J. Alexandre, P. Benes, B. Bergmann, J. Bernabeu, A. Bevan, H. Branzas, P. Burian, M. Campbell, S. Cecchini, Y. M. Cho, M. de Montigny, A. De Roeck, J. R. Ellis, M. El Sawy, M. Fairbairn, D. Felea, M. Frank, J. Hays, A. M. Hirt, J. Janecek, M. Kalliokoski, A. Korzenev, D. H. Lacarrere, C. Leroy, G. Levi, A. Lionti, J. Mamuzic, A. Maulik, A. Margiotta, N. Mauri, N. E. Mavromatos, P. Mermod, M. Mieskolainen, L. Millward, V. A. Mitsou, R. Orava, I Ostrovskiy, P-P Ouimet, J. Papavassiliou, B. Parker, L. Patrizii, G. E. Pavalas, J. L. Pinfold, L. A. Popa, V Popa, M. Pozzato, S. Pospisil, A. Rajantie, R. Ruiz de Austri, Z. Sahnoun, M. Sakellariadou, A. Santra, S. Sarkar, G. Semenoff, A. Shaa, G. Sirri, K. Sliwa, R. Soluk, M. Spurio, M. Staelens, M. Suk, M. Tenti, V Togo, J. A. Tuszynski, A. Upreti, V. Vento, O. Vives, A. Wall
Summary: The MoEDAL trapping detector is made up of approximately 800 kg of aluminum volumes and was exposed to proton-proton collisions during run 2 of the LHCb program. Evidence for particles with electric and magnetic charge in the trapping detector was sought using a superconducting quantum interference device (SQUID) magnetometer. By excluding dyons and monopoles within certain charge and mass ranges, the study provides important insights into the characteristics of these particles.
PHYSICAL REVIEW LETTERS
(2021)
Article
Physics, Nuclear
Z. -F. Cui, M. Ding, J. M. Morgado, K. Raya, D. Binosi, L. Chang, J. Papavassiliou, C. D. Roberts, J. Rodriguez-Quintero, S. M. Schmidt
Summary: The analysis of the pion valence-quark distribution function predicts that its behavior at x approximately equal to 1 follows the model of (1 - x)(β(σ)), taking into account the pion wave function prescribed by QCD. However, the empirical status of this behavior remains uncertain due to disagreements in fitting existing data. Further experimental data is needed to reach a final conclusion.
EUROPEAN PHYSICAL JOURNAL A
(2022)
Article
Multidisciplinary Sciences
B. Acharya, J. Alexandre, P. Benes, B. Bergmann, S. Bertolucci, A. Bevan, H. Branzas, P. Burian, M. Campbell, Y. M. Cho, M. de Montigny, A. De Roeck, J. R. Ellis, M. El Sawy, M. Fairbairn, D. Felea, M. Frank, O. Gould, J. Hays, A. M. Hirt, D. L-J Ho, P. Q. Hung, J. Janecek, M. Kalliokoski, A. Korzenev, D. H. Lacarrere, C. Leroy, G. Levi, A. Lionti, A. Maulik, A. Margiotta, N. Mauri, N. E. Mavromatos, P. Mermod, L. Millward, V. A. Mitsou, I Ostrovskiy, P-P Ouimet, J. Papavassiliou, B. Parker, L. Patrizii, G. E. Pavalas, J. L. Pinfold, L. A. Popa, V Popa, M. Pozzato, S. Pospisil, A. Rajantie, R. Ruiz de Austri, Z. Sahnoun, M. Sakellariadou, A. Santra, S. Sarkar, G. Semenoff, A. Shaa, G. Sirri, K. Sliwa, R. Soluk, M. Spurio, M. Staelens, M. Suk, M. Tenti, V Togo, J. A. Tuszyn'ski, A. Upreti, V. Vento, O. Vives
Summary: Magnetic monopoles, hypothetical fundamental particles, are searched for via the Schwinger mechanism in lead-lead heavy ion collisions. The MoEDAL experiment used trapping detectors and SQUID magnetometers to exclude the existence of magnetic monopoles with specific masses and charges.
Article
Physics, Nuclear
J. Papavassiliou
Summary: This article presents a comprehensive review of the key concepts associated with the Schwinger mechanism in QCD, highlighting the synergy between functional methods and lattice simulations and showcasing recent advances.
Article
Astronomy & Astrophysics
F. Pinto-Gomez, F. De Soto, M. N. Ferreira, J. Papavassiliou, J. Rodriguez-Quintero
Summary: We present new results for the three-gluon vertex obtained from a large-scale lattice simulation in the Landau gauge. The simulation evaluates the transversely projected vertex using a special tensorial basis, with form factors parametrized in terms of Bose-symmetric variables. Interestingly, the form factors primarily depend on a single kinematic variable, the sum of the squares of the three incoming four-momenta. This property, known as planar degeneracy, allows for a simplified and compact description of the data, suitable for future numerical applications. Confirming this property through a detailed study of specific configurations, we find that a semi-perturbative analysis accurately reproduces the lattice findings when a gluon mass is included to eliminate spurious divergences. (c) 2023 Published by Elsevier B.V. This is an open access article under the CC BY license (http:// creativecommons .org /licenses /by /4 .0/). Funded by SCOAP3.
Article
Astronomy & Astrophysics
A. C. Aguilar, F. De Soto, M. N. Ferreira, J. Papavassiliou, F. Pinto-Gomez, C. D. Roberts, J. Rodriguez-Quintero
Summary: Continuum and lattice analyses have discovered a mass-scale in the gluon two-point Schwinger function, indicating the presence of a Schwinger mechanism for gauge boson mass generation in quantum chromodynamics (QCD). By using numerical simulations of lattice-regularised QCD, the researchers established with high confidence the existence of a dynamically-generated, massless, colour-carrying, scalar gluon+gluon correlation, confirming the conjectured origin of the gluon mass scale.
Review
Astronomy & Astrophysics
Mauricio Narciso Ferreira, Joannis Papavassiliou
Summary: In this work, we review some significant progress in the investigation of the QCD gauge sector using the continuum Schwinger function methods and lattice simulations. These non-perturbative phenomena, such as the generation of a gluon mass, taming of the Landau pole, stabilization of the gauge coupling, and infrared suppression of the three-gluon vertex, play a crucial role in maintaining the internal consistency of the theory.
Article
Physics, Particles & Fields
A. C. Aguilar, M. N. Ferreira, D. Ibanez, B. M. Oliveira, J. Papavassiliou
Summary: In this study, we show through explicit calculations that the same distinct realization of the Slavnov-Taylor identity persists in the case of the background three-gluon vertex. The analysis is carried out at the level of the exact Schwinger-Dyson equation for this vertex, without any truncations or simplifying assumptions. The final result is obtained through extensive cancellations, without the need for explicit integrations. Additionally, we highlight that background Ward identities can be obtained by replacing derivatives of propagators with zero-momentum background-gluon insertions, similar to standard properties of Abelian gauge theories. Finally, we briefly discuss potential applications of these results.
EUROPEAN PHYSICAL JOURNAL C
(2023)
Article
Physics, Particles & Fields
A. C. Aguilar, M. N. Ferreira, B. M. Oliveira, J. Papavassiliou
Summary: In this study, we investigate a special Schwinger-Dyson equation in the context of a pure SU(3) Yang-Mills theory using the background field method. We focus on the vertex that describes the interaction between two background gluons and a ghost-antighost pair. By exploiting the background gauge invariance, we find that this vertex satisfies a simple Slavnov-Taylor identity that is unaffected by the ghost sector. In the limit where all momenta vanish, we obtain the exact form of this vertex from the corresponding Ward identity. Moreover, we demonstrate that this special result can be reproduced using the Schwinger-Dyson equation, taking advantage of Taylor's theorem and the specific relations in the background field method. This information allows us to determine the truncation error associated with two different truncation schemes and assess the potential benefit of using lattice data for the ghost dressing function.
EUROPEAN PHYSICAL JOURNAL C
(2022)
Article
Physics, Particles & Fields
B. Acharya, J. Alexandre, P. Benes, B. Bergmann, S. Bertolucci, A. Bevan, R. Bhattacharyya, H. Branzas, P. Burian, M. Campbell, S. Cecchini, Y. M. Cho, M. de Montigny, A. De Roeck, J. R. Ellis, M. ElSawy, M. Fairbairn, D. Felea, M. Frank, J. Hays, A. M. Hirt, P. Q. Hung, J. Janecek, M. Kalliokoski, A. Korzenev, D. H. Lacarrere, C. Leroy, G. Levi, A. Lionti, A. Margiotta, R. Maselek, A. Maulik, N. Mauri, N. E. Mavromatos, E. Musumeci, M. Mieskolainen, L. Millward, V. A. Mitsou, R. Orava, I Ostrovskiy, P-P Ouimet, J. Papavassiliou, B. Parker, L. Patrizii, G. E. Pavalas, J. L. Pinfold, L. A. Popa, V Popa, M. Pozzato, S. Pospisil, A. Rajantie, R. Ruiz de Austri, Z. Sahnoun, M. Sakellariadou, K. Sakurai, A. Santra, S. Sarkar, G. Semenoff, A. Shaa, G. Sirri, K. Sliwa, R. Soluk, M. Spurio, M. Staelens, M. Suk, M. Tenti, V Togo, A. Upreti, V. Vento, O. Vives
Summary: This study presents a search for highly electrically charged objects and magnetic monopoles using data collected by the MoEDAL detector at the LHC. The results provide constraints on the properties of these objects, such as their mass and charge.
EUROPEAN PHYSICAL JOURNAL C
(2022)
Article
Astronomy & Astrophysics
A. C. Aguilar, M. N. Ferreira, J. Papavassiliou
Summary: This study presents a detailed derivation of the non-Abelian Ward identity obeyed by the pole-free part of the three-gluon vertex in the soft gluon limit, and determines the displacement that the onset of the Schwinger mechanism produces to the standard result. The results obtained through two independent methods are in excellent coincidence, providing a self-consistency check for the entire approach. The statistical significance of the resulting signal is estimated to be 3 standard deviations compared to the null hypothesis.
Article
Astronomy & Astrophysics
A. C. Aguilar, C. O. Ambrosio, F. De Soto, M. N. Ferreira, B. M. Oliveira, J. Papavassiliou, J. Rodriguez-Quintero
Summary: In this study, the dynamics of the ghost sector in quenched QCD in the Landau gauge have been investigated using large-volume lattice simulations as key inputs. The results show excellent agreement between numerical treatments and lattice data, indicating a high level of consistency in both physical concepts and computational schemes.
Article
Astronomy & Astrophysics
Jan Horak, Joannis Papavassiliou, Jan M. Pawlowski, Nicolas Wink
Summary: The ghost spectral function in Yang-Mills theory is computed by solving the corresponding Dyson-Schwinger equation using a given input gluon spectral function. The results show a particle peak at vanishing momentum and a negative scattering spectrum, with analytically obtained infrared and ultraviolet tails. The ghost dressing function is calculated across the entire complex plane, and its key features are identified and discussed.
