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Astronomy & Astrophysics
Claudio Bonati, Michele Caselle, Silvia Morlacchi
Summary: The study shows that even with string breaking in the three-dimensional SU(2) Higgs model, the confining part of the interquark potential can still be accurately described by effective string theory. Furthermore, the fine details of the effective string, such as higher order terms of the Nambu-Goto action or boundary corrections, can be precisely extracted from fits and agree with the predictions of effective string theory.
Article
Astronomy & Astrophysics
Jangho Kim, Thomas Luu, Matthew D. Rizik, Andrea Shindler
Summary: In this study, a multiplicatively renormalized CP-violating quark chromoelectric dipole moment (qCEDM) operator was defined using gradient flow, and its behavior at small flow time was investigated. The linearly divergent coefficient with the flow time was determined nonperturbatively, and compared with the 1-loop perturbative expansion in both bare and renormalized strong coupling. The O(a) improvement of qCEDM at positive flow time was also discussed.
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Physics, Fluids & Plasmas
Zhipeng Xun, Dapeng Hao, Robert M. Ziff
Summary: By conducting extensive Monte Carlo simulations on various lattices, the study identified precise thresholds for site percolation systems and confirmed theoretical predictions through fitting data for compact neighborhoods. Power-law fits were also examined for the range of coordination numbers considered.
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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, Particles & Fields
Paul Merrikin, Carlos Nunez, Ricardo Stuardo
Summary: This paper studies an infinite family of Massive Type IIA backgrounds that holographically describe the twisted compactification of N = (1, 0) six-dimensional SCFTs to four dimensions. The analysis of the branes involved motivates a heuristic proposal for a four-dimensional linear quiver QFT that deconstructs the theory in six dimensions. For the case where the system reaches a strongly coupled fixed point, some observables are calculated and compared with holographic results. Two quantities measuring the number of degrees of freedom for the flow across dimensions are studied.
Article
Physics, Multidisciplinary
Andrei Alexandru, Paulo Bedaque, Evan Berkowitz, Neill C. Warrington
Summary: In this study, continuum and infinite volume limit extrapolations of the structure factors of neutron matter at finite temperature and density were computed using a lattice formulation of leading-order pionless effective field theory. The momentum dependence of the structure factors at finite temperature and densities beyond the reach of the virial expansion was also calculated. The Tan contact parameter was computed and found to agree with the high momentum tail of the vector structure factor, with all errors, statistical and systematic, being controlled for. This calculation represents a first step towards a model-independent understanding of the linear response of neutron matter at finite temperature.
PHYSICAL REVIEW LETTERS
(2021)
Article
Astronomy & Astrophysics
Martha Constantinou, Haralambos Panagopoulos
Summary: In this paper, an improved regularization-independent (RI)-type prescription is presented for the nonperturbative renormalization of gauge-invariant nonlocal operators. This method involves subtracting finite lattice spacing effects calculated in lattice perturbation theory to improve the nonperturbative vertex function. The approach is versatile, applicable to various fermion and gluon actions, and different types of nonlocal operators.
Article
Astronomy & Astrophysics
Nora Brambilla, Rafael L. Delgado, Andreas S. Kronfeld, Viljami Leino, Peter Petreczky, Sebastian Steinbeisser, Antonio Vairo, Johannes H. Weber
Summary: We present results for the static energy in (2 + 1 + 1)-flavor QCD over a wide range of lattice spacings and several quark masses, including the physical quark mass, with ensembles of lattice-gauge-field configurations made available by the MILC Collaboration. We obtain results for the static energy out to distances of nearly 1 fm, allowing us to perform a simultaneous determination of the scales r1 and r0, as well as the string tension sigma. Our findings indicate the decoupling of the charm quark for distances above 0.2 fm, while its effect is noticeable for smaller distances.
Article
Astronomy & Astrophysics
G. Bergner, M. Costa, H. Panagopoulos, S. Piemonte, I. Soler Calero, G. Spanoudes
Summary: In this work, the nonperturbative renormalization of the supercurrent operator in N = 1 supersymmetric Yang-Mills theory is studied, using a gauge-invariant renormalization scheme (GIRS). The proposed prescription successfully addresses the issue of unwanted mixing between the supercurrent and other operators of equal or lower dimension which respect the same global symmetries. This mixing is introduced due to the unavoidable breaking of supersymmetry on the lattice.
Article
Neurosciences
Alessandro Crimi, Luca Dodero, Fabio Sambataro, Vittorio Murino, Diego Sona
Summary: This paper proposes a constrained autoregressive model to understand how brain structure modulates function and discover novel biomarkers. The model includes indirect connections and can be used with raw and deconvoluted BOLD signal, showing results closer to reality.
Article
Mathematics, Applied
Jin Liu, Da-jun Zhang, Xuehui Zhao
Summary: This paper investigates the properties and transformations of the differential-difference modified Kadomtsev-Petviashvili (D Delta mKP) hierarchy. By introducing a new formulation of independent variables and nonisospectral flows, the paper obtains the discrete spectral problem of the hierarchy, a hierarchy of the differential-difference derivative nonlinear Schrödinger equation of the Chen-Lee-Liu type, and two sets of symmetries along with their algebraic structures. Finally, a unified continuum limit scheme is presented to establish the correspondence between the mKP hierarchy and the D Delta mKP hierarchy and their integrable structures.
STUDIES IN APPLIED MATHEMATICS
(2023)
Article
Astronomy & Astrophysics
Johanna N. Borissova, Bianca Dittrich
Summary: Spin foams are a quantization of classical gravity expressed via the Plebanski action. Recent results suggest a close relation between spin foam dynamics and area metrics instead of length metric. Inspired by these results, we construct a family of candidate actions for area metrics within the framework of modified Plebanski theory. These actions provide a starting point to explore the large-scale dynamics of spin foams and consequences of an enlargement of the configuration space for gravity.
CLASSICAL AND QUANTUM GRAVITY
(2023)
Article
Astronomy & Astrophysics
Massimo Giovannini
Summary: The effective approach is applied to the analysis of inflationary magnetogenesis, considering generally covariant terms with four space-time derivatives and weightings by inflaton-dependent couplings. The higher derivatives are suppressed by negative powers of a typical mass scale. This leads to an asymmetry between hypermagnetic and hyperelectric susceptibilities during a quasi-de Sitter stage.
Article
Astronomy & Astrophysics
H. Itoyama, T. Oota, R. Yoshioka
Summary: A sequence of massive scaling limits of the beta-deformed An-1 quiver matrix model is studied to obtain the integral representation of su(n) irregular conformal/W block. A set of relations among the mass parameters is derived in the region of maximal symmetry, which may serve as evidence for the existence of the Argyres-Douglas critical hypersurface.
Article
Physics, Multidisciplinary
Xu Li, Hao Xu, Chengjie Yang, Cen Zhang, Shuang-Yong Zhou
Summary: In this paper, we discuss a general method for obtaining full positivity bounds on multifield effective field theories, showing that the traditional approach only gives incomplete bounds for theories with three or more low-energy modes. We introduce a new method to determine optimal positivity bounds either analytically or numerically, and demonstrate its effectiveness with various examples in particle physics and cosmology. This SDP approach leads to improved or entirely new results, and is numerically more efficient compared to previous methods.
PHYSICAL REVIEW LETTERS
(2021)
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Astronomy & Astrophysics
Alejandro Corichi, Juan D. Reyes
CLASSICAL AND QUANTUM GRAVITY
(2015)
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Alejandro Corichi
INTERNATIONAL JOURNAL OF MODERN PHYSICS D
(2015)
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Alejandro Corichi, Irais Rubalcava-Garcia
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Alejandro Corichi, Asieh Karami, Saeed Rastgoo, Tatjana Vukasinac
CLASSICAL AND QUANTUM GRAVITY
(2016)
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Astronomy & Astrophysics
Alejandro Corichi, Parampreet Singh
CLASSICAL AND QUANTUM GRAVITY
(2016)
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Astronomy & Astrophysics
Alejandro Corichi, Asieh Karami
INTERNATIONAL JOURNAL OF MODERN PHYSICS D
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Review
Astronomy & Astrophysics
Alejandro Corichi, Irais Rubalcava-Garcia, Tatjana Vukasinac
INTERNATIONAL JOURNAL OF MODERN PHYSICS D
(2016)
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Astronomy & Astrophysics
Alejandro Corichi, Asieh Karami
CLASSICAL AND QUANTUM GRAVITY
(2014)
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Astronomy & Astrophysics
Alejandro Corichi, David Sloan
CLASSICAL AND QUANTUM GRAVITY
(2014)
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Astronomy & Astrophysics
Alejandro Corichi, Tatjana Vukasinac
INTERNATIONAL JOURNAL OF MODERN PHYSICS D
(2019)
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Astronomy & Astrophysics
Alejandro Corichi, Tatjana Vukasinac
CLASSICAL AND QUANTUM GRAVITY
(2020)
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Astronomy & Astrophysics
Ahhay Ashtekar, Alejandro Corichi, Aruna Kesavan
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Astronomy & Astrophysics
Alejandro Corichi, Juan D. Reyes, Tatjana Vukasinac
CLASSICAL AND QUANTUM GRAVITY
(2017)
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Astronomy & Astrophysics
Alejandro Corichi, Edison Montoya
CLASSICAL AND QUANTUM GRAVITY
(2017)
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Astronomy & Astrophysics
Alejandro Corichi, Javier Olmedo, Saeed Rastgoo