Article
Physics, Multidisciplinary
Yuan Li, Shi-Cheng Xia, Constantia Alexandrou, Krzysztof Cichy, Martha Constantinou, Xu Feng, Kyriakos Hadjiyiannakou, Karl Jansen, Chuan Liu, Aurora Scapellato, Fernanda Steffens, Jacopo Tarello
Summary: In this work, we study the intrinsic, rapidity-independent soft function within the framework of large momentum effective theory using lattice QCD. After renormalization and removal of higher-twist contamination, we obtain an intrinsic soft function that is comparable to the one-loop perturbative result at large external momentum. Determining the nonperturbative soft function from first principles is crucial for our understanding of processes with small transverse momentum.
PHYSICAL REVIEW LETTERS
(2022)
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
Constantia Alexandrou, Martha Constantinou, Kyriakos Hadjiyiannakou, Karl Jansen, Floriano Manigrasso
Summary: In this study, results on the quark unpolarized, helicity, and transversity parton distributions functions of the nucleon were presented using the quasiparton distribution approach within the lattice QCD framework. Nonzero results for the disconnected isoscalar and strange quark distributions were found, providing valuable input to the understanding of the nucleon structure.
Article
Astronomy & Astrophysics
Christopher Jung, Jan-Hendrik Otto, Ralf-Arno Tripolt, Lorenz von Smekal
Summary: This paper explores practicable ways for self-consistent calculations of spectral functions using analytically continued functional renormalization group (aFRG) flow equations. A particularly straightforward approach proposed is to include parametrizations of self-energies based on explicit analytic one-loop expressions. The results show the importance of self-consistency at all momenta in fixing the relation between particle masses and decay thresholds, offering a sound and practicable basis for calculations in more realistic effective theories.
Article
Astronomy & Astrophysics
Huey-Wen Lin, Jiunn-Wei Chen, Zhouyou Fan, Jian-Hui Zhang, Rui Zhang
Summary: This study presents the first lattice-QCD calculation of the kaon valence-quark distribution functions using the LaMET approach. The results are consistent with experimental data and predictions are made for the strange-quark distribution of the kaon.
Article
Astronomy & Astrophysics
M. Costa, G. Panagopoulos, H. Panagopoulos, G. Spanoudes
Summary: The study focuses on the Gluino-Glue operator in the context of Supersymmetric N = 1 Yang-Mills theory. It utilizes a Gauge-Invariant Renormalization Scheme to calculate Green's functions and conversion factors, allowing for analysis of low-lying bound states via numerical simulations.
Article
Materials Science, Multidisciplinary
Ryota Mizuno, Masayuki Ochi, Kazuhiko Kuroki
Summary: In this study, the iterative perturbation theory (IPT) was reinterpreted and extended to capture strong correlation effects by modifying the IPT vertex using parquet equations, achieving efficiency and reliability simultaneously. The method was applied to several models to evaluate validity, showing good agreements with numerically exact methods in DMFT calculations.
Article
Materials Science, Multidisciplinary
Tsuneya Yoshida
Summary: In this study, a correlated system in equilibrium with non-Hermitian topology inducing a skin effect was analyzed. The pseudospectrum under different boundary conditions and the impact of line-gap topology were discussed. Numerical simulations revealed that damping of quasiparticles destroys nontrivial line-gap topology while inducing nontrivial point-gap topology, which are reflected in the temperature dependence of local pseudospectral weight.
Article
Astronomy & Astrophysics
Kuan Zhang, Yuan-Yuan Li, Yi-Kai Huo, Andreas Schaefer, Peng Sun, Yi-Bo Yang
Summary: The study found that the cancellation of 1/a divergence deteriorates with decreasing lattice spacing, and the RI/MOM method leaves a linearly divergent residue when dealing with quasi-PDFs. Additionally, in the Landau gauge, the interaction between the Wilson link and the external state leads to a linear divergence that depends on the discretized fermion action.
Article
Astronomy & Astrophysics
C. Alexandrou, A. Athenodorou, K. Hadjiyiannakou, A. Todaro
Summary: We extract the neutron electric dipole moment within lattice QCD formalism, finding that calculating the topological charge using spectral projectors leads to smaller errors compared to field theoretic definition. The results show that the neutron electric dipole moment value is statistically consistent with zero when using the fermionic definition.
Article
Astronomy & Astrophysics
Kazem Bitaghsir Fadafan, Jesus Cruz Rojas, Nick Evans
Summary: The study presents a holographic model of QCD that explains the properties, phase transitions, and equations of state of quark matter at high densities. By solving the relevant equations, it demonstrates that hybrid stars with quark cores are stable and consistent with observational data.
Article
Astronomy & Astrophysics
Gen Wang, Yi-Bo Yang, Jian Liang, Terrence Draper, Keh-Fei Liu
Summary: This study presents a calculation of the proton momentum and angular momentum decompositions, providing insights into the contributions of quarks and glue inside the proton, which have been cross-checked through nonperturbative renormalization.
Article
Physics, Multidisciplinary
Javier del Pino, Oded Zilberberg
Summary: The quantum simulation of dynamical gauge field theories allows for studying complex high-energy physics using controllable low-energy devices. In this study, we demonstrate the use of bosonic codes to simulate dynamical gauge fields by encoding matter and gauge fields in a network of resonators coupled via three-wave mixing. Our findings provide insights into preserving necessary gauge symmetries and promote the realization of high-energy models using bosonic codes.
PHYSICAL REVIEW LETTERS
(2023)
Article
Astronomy & Astrophysics
Nuha Chreim, Christian Hoelbling, Christian Zielinski
Summary: This article provides an explicit proof for the locality of staggered overlap operators, covering both Adams' original two flavor construction and a single flavor version. Similar to Neuberger's operator, an admissibility condition for the gauge fields is required.
Article
Physics, Particles & Fields
Yi-Kai Huo, Yushan Su, Long-Cheng Gui, Xiangdong Ji, Yuan-Yuan Li, Yizhuang Liu, Andreas Schafer, Maximilian Schlemmer, Peng Sun, Wei Wang, Yi-Bo Yang, Jian-Hui Zhang, Kuan Zhang
Summary: This study investigates the renormalization of large-momentum effective theory using different fermion formulations on the lattice, and proposes a strategy to address the issue of linear divergences. The results indicate that renormalization factors are universal in hadron state matrix elements, while physical matrix elements appear independent of the fermion formulation.
Article
Physics, Particles & Fields
Ryuichiro Kitano, Norikazu Yamada, Masahito Yamazaki
Summary: In this study, the theta dependence of vacuum energy for the 4d SU(2) pure Yang-Mills theory is investigated, with the determination of the first two coefficients in the theta expansion of the vacuum energy in the continuum limit. The SU(2) results are found to be consistent with large N scaling, and by analytic continuing the number of colors to non-integer values, the phase diagram of the vacuum structure of SU(N) gauge theory is inferred. Quantitative evidence is provided for the gapped property of 4d SU(2) Yang-Mills theory at theta = pi with spontaneous breaking of the CP symmetry based on numerical results.
JOURNAL OF HIGH ENERGY PHYSICS
(2021)
Article
Physics, Particles & Fields
Ryuichiro Kitano, Hiromasa Takaura, Shoji Hashimoto
Summary: In this study, a numerical computation of the anomalous magnetic moment of the electron in QED was performed using stochastic perturbation theory. A new method was developed to calculate the coefficients of the perturbative series without the use of Feynman diagrams, demonstrating its feasibility up to alpha (3) order. This work serves as an independent check of results obtained by Feynman diagrams and is useful for estimating higher order values.
JOURNAL OF HIGH ENERGY PHYSICS
(2021)
Article
Physics, Multidisciplinary
Makoto Arimoto, Hideki Asada, Michael L. Cherry, Michiko S. Fujii, Yasushi Fukazawa, Akira Harada, Kazuhiro Hayama, Takashi Hosokawa, Kunihito Ioka, Yoichi Itoh, Nobuyuki Kanda, Koji S. Kawabata, Kyohei Kawaguchi, Nobuyuki Kawai, Tsutomu Kobayashi, Kazunori Kohri, Yusuke Koshio, Kei Kotake, Jun Kumamoto, Masahiro N. Machida, Hideo Matsufuru, Tatehiro Mihara, Masaki Mori, Tomoki Morokuma, Shinji Mukohyama, Hiroyuki Nakano, Tatsuya Narikawa, Hitoshi Negoro, Atsushi Nishizawa, Takayuki Ohgami, Kazuyuki Omukai, Takanori Sakamoto, Shigeyuki Sako, Mahito Sasada, Yuichiro Sekiguchi, Motoko Serino, Jiro Soda, Satoshi Sugita, Kohsuke Sumiyoshi, Hajime Susa, Teruaki Suyama, Hirotaka Takahashi, Kazuya Takahashi, Tomoya Takiwaki, Takahiro Tanaka, Masaomi Tanaka, Ataru Tanikawa, Nozomu Tominaga, Nami Uchikata, Yousuke Utsumi, Mark R. Vagins, Kei Yamada, Michitoshi Yoshida
Summary: The detections of gravitational waves by the LIGO/Virgo collaborations open up various possibilities for physics and astronomy. Continuous improvement of detectors, including new detectors like KAGRA and LIGO-India, will greatly enhance the precision and quantity of gravitational wave observations. The development of gravitational wave physics and astronomy focuses on studying representative sources such as binary black holes, binary neutron stars, and supernovae, while also serving as a probe for new physics.
PROGRESS OF THEORETICAL AND EXPERIMENTAL PHYSICS
(2021)
Article
Astronomy & Astrophysics
Ryuichiro Kitano, Ryutaro Matsudo, Norikazu Yamada, Masahito Yamazaki
Summary: The study proposes a subvolume method to investigate the theta dependence of the free energy density of the four-dimensional SU(N) Yang-Mills theory on the lattice. By applying this method to SU(2) Yang-Mills theory, insights were gained into the systematic of the method. The results suggest evidence for spontaneous CP violation at theta = pi, in line with large N predictions but indicating differences between 4d SU(N) and 2d CPN-1 theories for N = 2.
Article
Materials Science, Multidisciplinary
Yuan Chiang, Ting-Wai Chiu, Shu-Wei Chang
Summary: A novel modeling tool is proposed to rapidly estimate materials properties with high reproducibility. By utilizing GPU acceleration and parallel computing, it provides a fast and flexible platform to study the elastic and fracture behaviors of materials. With the growing demand for new materials and structures, this research is of great significance in advancing the design process and improving quality control.
FRONTIERS IN MATERIALS
(2022)
Correction
Materials Science, Multidisciplinary
Yuan Chiang, Ting-Wai Chiu, Shu-Wei Chang
FRONTIERS IN MATERIALS
(2022)
Article
Astronomy & Astrophysics
Wakana Iwakami, Akira Harada, Hiroki Nagakura, Ryuichiro Akaho, Hirotada Okawa, Shun Furusawa, Hideo Matsufuru, Kohsuke Sumiyoshi, Shoichi Yamada
Summary: Using full Boltzmann neutrino transport, this study investigated the performance of some closure relations commonly employed in the truncated moment method under rapid rotation in 2D core-collapse supernova simulations.
ASTROPHYSICAL JOURNAL
(2022)
Article
Physics, Particles & Fields
Paolo Gambino, Shoji Hashimoto, Sandro Maechler, Marco Panero, Francesco Sanfilippo, Silvano Simula, Antonio Smecca, Nazario Tantalo
Summary: We present an ab initio study of inclusive semileptonic decays of heavy mesons from lattice QCD. Our results obtained from gauge-field ensembles are compared with theoretical predictions from the operator-product expansion.
JOURNAL OF HIGH ENERGY PHYSICS
(2022)
Article
Computer Science, Interdisciplinary Applications
Ken-Ichi Ishikawa, Issaku Kanamori, Hideo Matsufuru, Ikuo Miyoshi, Yuta Mukai, Yoshifumi Nakamura, Keigo Nitadori, Miwako Tsuji
Summary: We present the results of the world's first over 100 PFLOPS single precision lattice QCD quark solver on the Japanese new supercomputer Fugaku. Our approach achieves a 38 times speedup compared to the supercomputer K on the same problem size, 1924, with 102 PFLOPS and a floating-point operation efficiency of 10%.
COMPUTER PHYSICS COMMUNICATIONS
(2023)
Article
Astronomy & Astrophysics
Ryuichiro Akaho, Akira Harada, Hiroki Nagakura, Wakana Iwakami, Hirotada Okawa, Shun Furusawa, Hideo Matsufuru, Kohsuke Sumiyoshi, Shoichi Yamada
Summary: In this study, we investigate the convection phenomenon in protoneutron stars (PNS) using a newly developed numerical code. We find that convection is indeed instigated in our 2D simulation and settles into a quasi-steady state. It is sustained by the negative electron fraction gradient, which is maintained by neutrino emissions. Furthermore, we analyze the possibility of neutrino fast flavor conversion and find that it is likely to occur in regions with lower electron fraction.
ASTROPHYSICAL JOURNAL
(2023)
Article
Astronomy & Astrophysics
Ting-Wai Chiu
Summary: This paper studies the correlation functions of meson interpolators in Nf = 2 + 1 + 1 lattice QCD theory with optimal domain-wall quarks at the physical point for six temperatures ranging from T ≈ 190-770 MeV. The meson interpolators consist of a complete set of Dirac bilinears, with six combinations for each quark flavor. The focus is on the meson correlators of u and d quarks, and their implications for the effective restoration of U(1)A and SU(2)L x SU(2)R chiral symmetries, as well as the emergence of approximate SU(2)CS chiral spin symmetry are discussed.
Article
Astronomy & Astrophysics
Yu-Chih Chen, Ting-Wai Chiu, Tung -Han Hsieh
Summary: In this study, we perform hybrid Monte-Carlo simulation of lattice QCD with Nf = 2 + 1 + 1 domain-wall quarks at the physical point. The results provide a basis for studying finite temperature QCD with Nf = 2 + 1 + 1 domain-wall quarks. By measuring the topological charge and determining the topological susceptibility at different lattice spacings and temperatures, we are able to extract the topological susceptibility in the continuum limit.
Article
Astronomy & Astrophysics
Tsutomu Ishikawa, Shoji Hashimoto
Summary: The proposed method utilizes lattice QCD to compute the Borel transform of the vacuum polarization function in the Shifman-Vainshtein-Zakharov QCD sum rule. By constructing the spectral sum corresponding to the Borel transform from two-point functions on the Euclidean lattice, the method is confirmed to be consistent with the operator product expansion in the large Borel mass region. This method provides a basis for direct comparison of OPE analyses with nonperturbative lattice computations.
Proceedings Paper
Computer Science, Interdisciplinary Applications
Issaku Kanamori, Ken-Ichi Ishikawa, Hideo Matsufuru
Summary: The study focuses on implementing and benchmarking an algebraic multi-grid solver on three different architectures to maintain high performance and portability. Specific parts of the code are optimized for individual architectures, while the abstract solver algorithm is common across all architectures.
COMPUTATIONAL SCIENCE AND ITS APPLICATIONS, ICCSA 2021, PT V
(2021)
Article
Astronomy & Astrophysics
S. Aoki, Y. Aoki, G. Cossu, H. Fukaya, S. Hashimoto, T. Kaneko, C. Rohrhofer, K. Suzuki
Summary: By conducting experiments within a temperature range, it was found that the axial U(1) anomaly above the critical temperature is consistent with zero within statistical errors. The quark mass dependence suggests that its disappearance rate is comparable to that of SU(2)(L) x SU(2)(R) symmetry breaking.
