Article
Astronomy & Astrophysics
Zachary T. Draper, Stephen R. Sharpe
Summary: This study investigates pion-pion scattering in partially-quenched twisted-mass lattice QCD, revealing issues related to discretization errors and violation of unitarity. It proposes a systematic solution for reducing discretization errors by calculating the I = 2 scattering amplitude, while indicating that the error from the violation of unitarity is challenging to minimize in practice.
Article
Astronomy & Astrophysics
Frank X. Lee, Andrei Alexandru, Ruairi Brett
Summary: This article focuses on precise calculations of scattering phase shifts and resonance parameters in the two-body sector of lattice QCD. The study derives higher-order quantization conditions and introduces a method for transparently cross-checking the results, which is essential given the involved derivations of these formulas.
Article
Physics, Multidisciplinary
Jeremy R. Green, Andrew D. Hanlon, Parikshit M. Junnarkar, Hartmut Wittig
Summary: This study presents the first exploration of baryon-baryon interactions in the continuum limit of lattice QCD, revealing unexpectedly large lattice artifacts impacting the binding energy. By applying variational methods and Luscher's finite-volume quantization conditions, scattering phase shifts can be determined from the spectrum, leading to an estimate of the binding energy of the H dibaryon in three-flavor QCD.
PHYSICAL REVIEW LETTERS
(2021)
Article
Astronomy & Astrophysics
Andrew W. Jackura, Raul A. Briceno, Sebastian M. Dawid, Md Habib E. Islam, Connor McCarty
Summary: This study presents a simple scheme for solving relativistic integral equations for three-body amplitudes, exploring different solving strategies and discussing ways of incorporating bound-state pole contribution in the integral equations. The methods presented allow for determination of amplitudes above the three-body threshold and further the objective for directly extracting three-hadron scattering amplitudes from lattice QCD.
Article
Astronomy & Astrophysics
Dalibor Djukanovic, Georg von Hippel, Jonna Koponen, Harvey B. Meyer, Konstantin Ottnad, Tobias Schulz, Hartmut Wittig
Summary: The isovector axial form factor of the nucleon is calculated using lattice-QCD and a new method to directly extract its z expansion from lattice correlators. The final parameterization of this form factor agrees with previous lattice calculations but shows a significantly smaller slope than suggested by neutrino-deuterium scattering data.
Article
Physics, Multidisciplinary
K. Miwa, J. K. Ahn, Y. Akazawa, T. Aramaki, S. Ashikaga, S. Callier, N. Chiga, S. W. Choi, H. Ekawa, P. Evtoukhovitch, N. Fujioka, M. Fujita, T. Gogami, T. Harada, S. Hasegawa, S. H. Hayakawa, R. Honda, S. Hoshino, K. Hosomi, M. Ichikawa, Y. Ichikawa, M. Ieiri, M. Ikeda, K. Imai, Y. Ishikawa, S. Ishimoto, W. S. Jung, S. Kajikawa, H. Kanauchi, H. Kanda, T. Kitaoka, B. M. Kang, H. Kawai, S. H. Kim, K. Kobayashi, T. Koike, K. Matsuda, Y. Matsumoto, S. Nagao, R. Nagatomi, Y. Nakada, M. Nakagawa, I Nakamura, T. Nanamura, M. Naruki, S. Ozawa, L. Raux, T. G. Rogers, A. Sakaguchi, T. Sakao, H. Sako, S. Sato, T. Shiozaki, K. Shirotori, K. N. Suzuki, S. Suzuki, M. Tabata, C. D. L. Taille, H. Takahashi, T. Takahashi, T. N. Takahashi, H. Tamura, M. Tanaka, K. Tanida, Z. Tsamalaidze, M. Ukai, H. Umetsu, S. Wada, T. O. Yamamoto, J. Yoshida, K. Yoshimura
Summary: The differential cross sections of the Sigma(-) p -> Lambda n reaction were accurately measured and precise angular information about the reaction was obtained for the first time. The obtained differential cross sections show a slightly forward-peaking structure. These results play an essential role in updating the theoretical models of baryon-baryon interactions.
PHYSICAL REVIEW LETTERS
(2022)
Article
Astronomy & Astrophysics
Yan Lyu, Hui Tong, Takuya Sugiura, Sinya Aoki, Takumi Doi, Tetsuo Hatsuda, Jie Meng, Takaya Miyamoto
Summary: Optimized interpolating operators are constructed using the HAL QCD method, which are dominantly coupled to each eigenstate of two baryons. The validity of these operators is tested by considering heavy dibaryons??3Q??3Q (Q = s, c) calculated by (2 + 1)-flavor lattice QCD simulations. The results show that the optimized operators provide effective energies of the ground and excited states and can reliably extract the potential V(r).
Article
Physics, Fluids & Plasmas
M. K. Wen, L. Xiong, B. Zheng
Summary: Antiferromagnetic skyrmions are considered promising information carriers due to their attractive properties. The critical current and static and dynamic critical exponents of the depinning phase transition have been accurately determined through numerical simulation and theoretical analysis. Manipulating antiferromagnetic skyrmions and designing novel information processing devices can be greatly influenced by the sensitivity of the critical current to nonadiabatic coefficient.
Article
Physics, Multidisciplinary
Maxwell T. Hansen, Raul A. Briceno, Robert G. Edwards, Christopher E. Thomas, David J. Wilson
Summary: Focusing on the three-pion states with maximal isospin, the first nonperturbative determination of an energy-dependent three-hadron scattering amplitude from first-principles QCD is presented. The resulting amplitude exhibits rich analytic structure and a complicated dependence on the two-pion invariant masses.
PHYSICAL REVIEW LETTERS
(2021)
Article
Astronomy & Astrophysics
Xiao-Hui Chen, Qi-Nan Wang, Wei Chen, Hua-Xing Chen
Summary: This study investigates the mass spectra of N Omega dibaryons in different channels and predicts the existence of a bound state in the S-5(2) channel. The results suggest that N Omega dibaryons in the S-3(1) channel may decay directly into final states in S wave. This research provides insights into the potential identification of these N Omega dibaryons in future relativistic heavy-ion collision experiments.
Article
Astronomy & Astrophysics
Zachary T. Draper, Stephen R. Sharpe
Summary: Partial quenching allows for the consideration of correlation functions and amplitudes that are not present in the corresponding unquenched theory. The proposal that the finite-volume quantization condition of Luscher holds for certain correlation functions is shown to fail for those where the corresponding one-loop amplitudes do not satisfy s-wave unitarity. However, for partially-quenched amplitudes that satisfy one-loop s-wave unitarity, the proposal is deemed reasonable.
Article
Astronomy & Astrophysics
Tanjib Khan, David Richards, Frank Winter
Summary: This study calculates the low-lying spectra of the positive-parity Delta and N baryons using the generalized variational method, observing hybrid states with gluonic degrees of freedom playing a structural role in the excited baryon spectrum.
Article
Physics, Multidisciplinary
Nicolas Lang, David J. Wilson, Hadron Spectrum Collaboration
Summary: We present lattice QCD calculations for D * K scattering amplitudes, and identify low-lying D1 and D * 2 states with different angular momentum and parity. Our analysis of the scattering amplitudes reveals interesting features, including a near-threshold bound state and a narrow resonance peak.
PHYSICAL REVIEW LETTERS
(2022)
Review
Physics, Nuclear
Aaron S. Meyer, Andre Walker-Loud, Callum Wilkinson
Summary: This article reviews the current status of theoretical and experimental research on neutrino-nucleon interactions, and introduces the method and results of using lattice quantum chromodynamics (LQCD) to calculate these interactions. The LQCD results show inconsistency with existing models, which may have significant implications for neutrino oscillation experiments.
ANNUAL REVIEW OF NUCLEAR AND PARTICLE SCIENCE
(2022)
Article
Physics, Nuclear
Zhouyou Fan, Rui Zhang, Huey-Wen Lin
Summary: In this study, the first lattice-QCD results were presented to access the x-dependence of the gluon unpolarized PDF of the nucleon. The results show that the fitted gluon PDFs at both pion masses are consistent with global fits in the x > 0.3 region.
INTERNATIONAL JOURNAL OF MODERN PHYSICS A
(2021)