Article
Physics, Particles & Fields
Nikolai Husung
Summary: We derive the asymptotic lattice spacing dependence relevant for spectral quantities of lattice QCD, when using different types of quarks. Examples are given for various scenarios, including partially quenched case, mixed actions, and different discretizations for dynamical quarks. The results show that the leading order lattice artifacts are not severely enhanced but a dense spectrum of leading powers may lead to pile-ups and cancellations. The computational strategy used to calculate the 1-loop anomalous dimensions is presented in detail.
EUROPEAN PHYSICAL JOURNAL C
(2023)
Article
Mechanics
Alexi Morin-Duchesne, Andreas Klumper, Paul A. Pearce
Summary: The study focuses on the Y-systems satisfied by the A(1)((1)), A(2)((1)), and A(2)((2)) vertex and loop models at roots of unity, corresponding to the dense, fully packed, and dilute Temperley-Lieb loop models. By converting known functional equations to nonlinear integral equations and simplifying the resulting expressions using various dilogarithm identities, the finite-size 1/N corrections to the groundstate eigenvalue are solved, showing agreement with previous results obtained by different methods.
JOURNAL OF STATISTICAL MECHANICS-THEORY AND EXPERIMENT
(2021)
Article
Materials Science, Multidisciplinary
Doru Sticlet, Frederic Piechon
Summary: We study the continuum limit of two-dimensional chiral magnets with Dzyaloshinskii-Moriya interaction due to the interplay between smooth magnetic texture and spin-orbit coupling. The free-energy density contains linear terms in the spatial gradient of the magnetic texture, leading to the formation of nontrivial magnetic orders. We analyze the DMI tensors responsible for this contribution to free energy and find non-Lifshitz invariants features.
Article
Astronomy & Astrophysics
Jeppe R. Andersen, Bertrand Ducloue, Conor Elrick, Andreas Maier, Graeme Nail, Jennifer M. Smillie
Summary: The study presents the first calculation of logarithmic corrections to the QCD contribution to same-sign W-pair production, showing that while the cross sections may see only a small change, various distributions relevant for experimental studies are significantly affected. The process is important for investigating electroweak couplings, with QCD contributions usually suppressed through cuts that enhance certain regions of phase space with logarithmic scaling.
Article
Astronomy & Astrophysics
Aritra Ghosh
Summary: In this paper, the authors study general statistical ensembles and calculate logarithmic corrections to microcanonical entropy resulting from thermodynamic fluctuations. The framework is applied to non-extremal black holes, resulting in certain corrections to the Bekenstein-Hawking entropy. The authors argue that the isoenthalpic-isobaric entropy has a more natural and consistent interpretation as black hole entropy within the framework of black hole chemistry. Logarithmic corrections to both microcanonical and isoenthalpic-isobaric entropies are computed, and comparisons are made to theories where the cosmological constant is not interpreted as a thermodynamic pressure. Finally, logarithmic corrections to entropy in the holographic black hole chemistry framework are computed, emphasizing the importance of choosing the appropriate statistical ensemble.
CLASSICAL AND QUANTUM GRAVITY
(2023)
Article
Physics, Multidisciplinary
Yawar H. Khan, Prince A. Ganai
Summary: In this paper, the existence and stability of remnants of Horndeski black holes are discussed. The results show that these remnants only exist in de-sitter space-time and their stability is tested through the statistical nature of black hole entropy and the presence of thermal fluctuations.
EUROPEAN PHYSICAL JOURNAL PLUS
(2022)
Article
Astronomy & Astrophysics
A. N. Ivanov, R. Hoellwieser, N. Troitskaya, M. Wellenzohn, Ya A. Berdnikov
Summary: This study investigates the contributions of the hadronic structure of the neutron to radiative corrections in neutron beta decay, showing that after renormalization, the corrections are on the order of a few parts of 10(-5)-10(-4). The calculated results align well with previous research findings, indicating the reliability of the approach used.
Article
Astronomy & Astrophysics
Anna Hasenfratz, Yigal Shamir, Benjamin Svetitsky
Summary: Adding Pauli-Villars fields can help reduce undesired effects when adding fermions to a lattice gauge theory, allowing for significantly larger renormalized couplings while damping short-distance fluctuations of the gauge field. This may enable controlled continuum extrapolations from large lattice spacings, even in theories with many light fermions.
Article
Astronomy & Astrophysics
M. Fischer, S. Groote
Summary: This study calculates first order radiative QCD corrections to the decay process of a polarized bottom quark, taking into account different polarization states and factors related to the quark. Nonperturbative corrections were also calculated and their contribution was estimated.
Article
Astronomy & Astrophysics
Wen-Long Sang, Feng Feng, Yu Jia, Zhewen Mo, Jia-Yue Zhang
Summary: In this study, we compute the O(αs^2) corrections to the exclusive channels e+e- -> J/ψ + χcJ (J = 0, 1, 2) within the nonrelativistic QCD (NRQCD) factorization framework at √s = 10.58 GeV. The validity of NRQCD factorization at O(αs^2) has been confirmed and the impact of the O(αs^2) corrections on the polarized and unpolarized cross sections, as well as the J/ψ angular distributions, are analyzed. Our predictions for σ(J/ψ + χc1,2) through O(αs^2) are compatible with the upper limit of the Belle measurement. However, there is still tension between the predicted and measured profiles for the J/ψ angular distribution. The future measurements in the Belle 2 experiment can provide interesting comparisons with our NRQCD predictions.
Article
Physics, Particles & Fields
Ekta Chaubey, Mandeep Kaur, Ambresh Shivaji
Summary: In this paper, we present analytic results for all Feynman integrals relevant to O(alpha alpha(s)) virtual corrections to H -> ZZ* decay. We utilize the method of differential equations to solve the master integrals with full consideration of the masses of all particles, including those in the loop. We address the issue of rationalizing the multiple square roots arising from the presence of four mass scales.
JOURNAL OF HIGH ENERGY PHYSICS
(2022)
Article
Chemistry, Multidisciplinary
Xiang Wang, Junshan Li, Qian Xue, Xu Han, Congcong Xing, Zhifu Liang, Pablo Guardia, Yong Zuo, Ruifeng Du, Lluis Balcells, Jordi Arbiol, Jordi Llorca, Xueqiang Qi, Andreu Cabot
Summary: This study presents the synthesis of cobalt-iron oxide nanosheets with controlled amounts of SO42- anionic groups, which exhibit excellent performance in the electrochemical oxygen evolution reaction (OER). The synthesis involves the use of a cobalt-based zeolitic imidazolate framework as a template and a source of iron and sulfate. Through a diffusion-controlled process, the structure of the framework is etched, forming porous assemblies of nanosheets. Iron ions partially replace cobalt, and sulfate ions are anchored on the material surface. The optimized material demonstrates outstanding OER activity, with a low overpotential and high stability.
Article
Physics, Multidisciplinary
Kanehisa Takasaki
Summary: The intermediate long wave (ILW) hierarchy, formulated as reductions of the lattice KP hierarchy, inherits its integrability and can capture all solutions through a factorization problem of difference operators. A special solution is obtained from Okounkov and Pandharipande's dressing operators for equivariant Gromov-Witten theory, suggesting a hidden link with the equivariant Toda hierarchy. The generalized ILW hierarchy is also related to the lattice Gelfand-Dickey hierarchy and logarithmic flows can be derived from it through a scaling limit.
JOURNAL OF PHYSICS A-MATHEMATICAL AND THEORETICAL
(2023)
Article
Astronomy & Astrophysics
Aritra Ghosh, Sudipta Mukherji, Chandrasekhar Bhamidipati
Summary: The aim of this work is to compute novel logarithmic corrections to black hole entropy coming from simultaneous fluctuations of energy and thermodynamic volume. By working in the isothermal-isobaric ensemble and applying the formalism to Kerr black holes in AdS, a general form of corrections to black hole entropy is obtained.
CLASSICAL AND QUANTUM GRAVITY
(2022)
Article
Astronomy & Astrophysics
H. C. Lange, A. Krasniqi, S. Scherer
Summary: We analyze the radiative transitions between the vector-meson nonet and the pseudoscalar-meson nonet, considering quark-mass and 1/N-c corrections, using a chiral effective Lagrangian approach. By fitting the available coupling constants to experimental data, we obtain a reasonably good description of the twelve experimental decay rates.
Article
Astronomy & Astrophysics
Nelson R. F. Braga, Octavio C. Junqueira
Summary: This study investigates the influence of rotation on the transition temperature of strongly interacting matter produced in non-central heavy ion collisions. By using a holographic description of an AdS black hole, the authors extend the analysis to the more realistic case where the matter spreads over a region around the rotational axis. The results show the coexistence of confined and deconfined phases and are consistent with the concept of local temperature in rotating frames developed by Tolman and Ehrenfest.
Article
Astronomy & Astrophysics
Bing Sun, Jiachen An, Zhoujian Cao
Summary: This paper investigates the effect of gravitational constant variation on the propagation of gravitational waves. By employing two analytical methods, the study finds that variations in the gravitational constant result in amplitude and phase corrections for gravitational waves, and the time variation of the gravitational constant can be constrained through the propagation of gravitational waves.
Article
Astronomy & Astrophysics
Abdellah Touati, Zaim Slimane
Summary: This letter presents the first study of Hawking radiation as a tunneling process within the framework of non-commutative gauge theory of gravity. The non-commutative Schwarzschild black hole is reconstructed using the Seiberg-Witten map and the star product. The emission spectrum of outgoing massless particles is computed using the quantum tunneling mechanism. The results reveal pure thermal radiation in the low-frequency scenario, but a deviation from pure thermal radiation in the high-frequency scenario due to energy conservation. It is also found that noncommutativity enhances the correlations between successively emitted particles.
Article
Astronomy & Astrophysics
Shahar Hod
Summary: The travel times of light signals between two antipodal points on a compact star's surface are calculated for two different trajectories. It is shown that, for highly dense stars, the longer trajectory along the surface may have a shorter travel time as measured by asymptotic observers. A critical value of the dimensionless density-area parameter is determined for constant density stars to distinguish cases where crossing through the star's center or following a semi-circular trajectory on the surface has a shorter travel time as measured by asymptotic observers.
