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, 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)
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
Ruairi Brett, Chris Culver, Maxim Mai, Andrei Alexandru, Michael Doring, Frank X. Lee
Summary: In this study, a fit of the finite-volume QCD spectrum of three pions at maximal isospin was performed to constrain the three-body force. Results indicate consistency with a constant contact term close to zero for heavier pion mass, while showing statistically significant energy dependence for lighter mass. The findings also suggest the potential to constrain the two-body amplitude with sufficient three-body energy levels.
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, Particles & Fields
Tyler D. Blanton, Andrew D. Hanlon, Ben Hoerz, Colin Morningstar, Fernando Romero-Lopez, Stephen R. Sharpe
Summary: This study investigated two- and three-meson systems composed of pions or kaons with maximal isospin using Monte Carlo simulations of lattice QCD. High precision energy levels were determined using the stochastic LapH method, and parameters of the two- and three-particle K-matrices were calculated. The results suggest that the statistical precision of the spectra can probe s-wave and d-wave interactions, with the first-time determination of a term in the three-particle K-matrix containing two-particle d waves.
JOURNAL OF HIGH ENERGY PHYSICS
(2021)
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
Chien-Yeah Seng, Vincenzo Cirigliano, Xu Feng, Mikhail Gorchtein, Luchang Jin, Gerald A. Miller
Summary: Recent estimates suggest that the strong isospin-symmetry breaking (ISB) corrections to the Fermi matrix element in free neutron decay may be one order of magnitude larger than the naive estimate based on a theorem. To investigate this claim, we derive a general expression for the leading ISB correction to hadronic Fermi matrix elements, which can be computed from first principles. Our formalism opens up the possibility of determining this correction in the neutron sector with fully-controlled theory uncertainties.
Article
Astronomy & Astrophysics
Floriana Giannuzzi, Stefano Nicotri
Summary: The singlet pseudoscalar sector of light mesons was investigated in the soft-wall model, utilizing a bottom-up approach to the AdS/QCD correspondence. The eta' mass arises from the mixing of fields dual to the axial current, pseudoscalar current, and the G (G) over tilde operator. The topological susceptibility was calculated for any quark mass, and the Witten-Veneziano relation was derived in the large Nc limit.
Article
Physics, Particles & Fields
Pei-Lin Yin, Zhu-Fang Cui, Craig D. Roberts, Jorge Segovia
Summary: The research uses a symmetry-preserving treatment to compute spectra of mesons and baryons, reproducing known masses with high accuracy. It indicates the importance of dynamic, nonpointlike diquark correlations in baryons, with the lightest allowed diquark being the most important component of a baryon's Faddeev amplitude.
EUROPEAN PHYSICAL JOURNAL C
(2021)
Article
Astronomy & Astrophysics
Hui Liu, Jarah Evslin, Baiyang Zhang
Summary: In a (1 + 1)-dimensional scalar quantum field theory, we calculate the leading-order probability of meson multiplication, which is the inelastic scattering process: kink + meson -> kink +2 mesons. We also calculate the differential probability with respect to the final meson momenta and the probability that one or two of the final mesons recoils back towards the source. In the ultrarelativistic limit of the initial meson, the total probability tends to a constant, which we calculate analytically in the phi 4 model. At this order the meson sector conserves energy on its own, while the incoming meson applies a positive pressure to the kink. This is in contrast with the situation in classical field theory, where Romanczukiewicz and collaborators have shown that, in the presence of a reflectionless kink, only meson fusion is allowed, resulting in a negative radiation pressure on the kink.
Article
Astronomy & Astrophysics
W. Detmold, P. E. Shanahan
Summary: The study investigates the use of pionless effective field theory in a finite volume (FVEFT pi/) as a framework to analyze multinucleon spectra and matrix elements calculated in lattice QCD (LQCD). By combining FVEFT pi/ with the stochastic variational method, spectra of nuclei with atomic number A is an element of {2, 3} are matched to existing finite-volume LQCD calculations at heavier-than-physical quark masses, enabling determination of infinite-volume binding energies.
Review
Physics, Multidisciplinary
Jose R. Pelaez, Arkaitz Rodas
Summary: This paper discusses the simultaneous dispersive analyses of nK -> nK and nn -> KK over bar scattering data and the K/K0*(700) resonance. By reviewing existing data and deriving relevant dispersion relations, precise amplitude parameterizations are obtained, providing rigor and accuracy for modern experimental and phenomenological hadron physics.
PHYSICS REPORTS-REVIEW SECTION OF PHYSICS LETTERS
(2022)
Article
Astronomy & Astrophysics
S. Aikawa, S. Ajimura, T. Akaishi, H. Asano, G. Beer, C. Berucci, M. Bragadireanu, P. Buehler, L. Busso, M. Cargnelli, S. Choi, C. Curceanu, S. Enomoto, H. Fujioka, Y. Fujiwara, T. Fukuda, C. Guaraldo, T. Hashimoto, R. S. Hayano, T. Hiraiwa, M. Iio, M. Iliescu, K. Inoue, Y. Ishiguro, S. Ishimoto, T. Ishikawa, K. Itahashi, M. Iwai, M. Iwasaki, K. Kanno, K. Kato, Y. Kato, S. Kawasaki, P. Kienle, Y. Komatsu, H. Kou, Y. Ma, J. Marton, Y. Matsuda, Y. Mizoi, O. Morra, R. Murayama, T. Nagae, H. Noumi, H. Ohnishi, S. Okada, Z. Omar, H. Outa, K. Piscicchia, Y. Sada, A. Sakaguchi, F. Sakuma, M. Sato, A. Scordo, M. Sekimoto, H. Shi, K. Shirotori, D. Sirghi, F. Sirghi, K. Suzuki, S. Suzuki, T. Suzuki, K. Tanida, H. Tatsuno, A. O. Tokiyasu, M. Tokuda, D. Tomono, A. Toyoda, K. Tsukada, O. Vazquez-Doce, E. Widmann, T. Yamaga, T. Yamazaki, H. Yim, Q. Zhang, J. Zmeskal
Summary: In this study, we measured the invariant mass spectra of pi(+/-)Sigma(-/+), pi(0)Sigma(0), and pi(-)Sigma(0) below and above the (K) over bar N mass threshold in K-induced reactions on deuteron. The experimentally observed pi Sigma mass spectral shape is well reproduced by a two-step mechanism involving the knock-out of a neutron from a deuteron by an incident K- at a forward angle, followed by the backward recoil of the (K) over bar and its reaction with the residual nucleon to produce pi and Sigma. By analyzing the data, we determined the S-wave (K) over bar N -> pi Sigma and (K) over bar N -> (K) over bar N scattering amplitudes in the isospin 0 channel, from which we found that the resonance pole corresponding to Lambda(1405) is located closer to the (K) over bar N mass threshold compared to the value determined by the Particle Data Group.
Article
Physics, Nuclear
Deeptak Biswas, Peter Petreczky, Sayantan Sharma
Summary: In this study, we investigate the temperature dependence of the renormalized chiral condensate in 2+1 flavor QCD using a noninteracting hadron resonance gas model. We propose a better criterion to estimate the pseudocritical temperature and obtain improved results compared to previous studies. The curvature of the pseudocritical line is found to be in good agreement with continuum extrapolated lattice results.
Review
Physics, Multidisciplinary
Zohreh Davoudi, William Detmold, Phiala Shanahan, Kostas Orginos, Assumpta Parreno, Martin J. Savage, Michael L. Wagman
Summary: In the past decade, numerical solutions of Quantum Chromodynamics (QCD) using lattice QCD techniques have advanced to the point of connecting fundamental aspects of nuclear physics with the underlying degrees of freedom of the Standard Model. Lattice QCD calculations of nuclear matrix elements offer guidance for low energy nuclear reactions in astrophysics, dark matter direct detection experiments, and experimental searches for violations of the symmetries of the Standard Model.
PHYSICS REPORTS-REVIEW SECTION OF PHYSICS LETTERS
(2021)
Review
Physics, Nuclear
Paulo Bedaque, Amber Boehnlein, Mario Cromaz, Markus Diefenthaler, Latifa Elouadrhiri, Tanja Horn, Michelle Kuchera, David Lawrence, Dean Lee, Steven Lidia, Robert McKeown, Wally Melnitchouk, Witold Nazarewicz, Kostas Orginos, Yves Roblin, Michael Scott Smith, Malachi Schram, Xin-Nian Wang
Summary: This report summarizes the outcomes of the workshop "AI for Nuclear Physics" held at Thomas Jefferson National Accelerator Facility on March 4-6, 2020.
EUROPEAN PHYSICAL JOURNAL A
(2021)
Article
Physics, Multidisciplinary
Silas R. Beane, Roland C. Farrell
Summary: This paper investigates the scattering matrix that describes the low-energy, non-relativistic scattering of spin-1/2 fermions interacting via finite-range potentials. The constraints on scattering trajectories and the effect of spatial dimensionality are explored using a geometric action principle.
Article
Physics, Multidisciplinary
Silas R. Beane, Roland C. Farrell
Summary: This study discovers UV/IR symmetries in the s-wave nucleon-nucleon scattering matrix, which provide an interpretation for phase shift features. The findings are significant for pionless EFT expansions and offer insights into novel expansion methods.
Article
Physics, Nuclear
Silas R. Beane, Roland C. Farrell
Summary: The low energy S-matrix, which describes non-relativistic scattering due to finite-range forces, possesses UV/IR symmetries that are hidden in the corresponding effective field theory (EFT) action. This study demonstrates that the S-matrix symmetries manifest as geometric symmetries of the RG flow of coupling constants in both three and two spatial dimensions in the EFT action. An example is provided to illustrate that UV/IR symmetry breaking in the S-matrix imposes strong constraints on the RG flow of the coefficients of the symmetry-breaking operators in the EFT.
Article
Astronomy & Astrophysics
Saman Amarasinghe, Riyadh Baghdadi, Zohreh Davoudi, William Detmold, Marc Illa, Assumpta Parreno, Andrew V. Pochinsky, Phiala E. Shanahan, Michael L. Wagman
Summary: The low-energy spectrum and scattering of two-nucleon systems have been investigated using lattice quantum chromodynamics and a variational approach. Various types of interpolating operators, including dibaryon operators, hexaquark operators, and quasilocal operators, were utilized. By employing sparsening techniques, correlation function matrices were formed from the quark propagators obtained from the operators. Variational methods were applied to constrain the low-energy spectra of two-nucleon systems in a finite volume. The study reveals the dependence of energy spectra on interpolating operators and highlights the strengths and weaknesses of variational methods.
Article
Optics
Silas R. Beane, Gianluca Bertaina, Roland C. Farrell, William R. Marshall
Summary: We study the ultracold and weakly coupled Fermi gas in two spatial dimensions using an effective field theory framework. It is found that the universal corrections to the energy density at two orders of interaction strength do not agree with Monte Carlo simulations in the weak-coupling regime. We obtain universal corrections to three orders of interaction strength, which provide agreement between theory and simulation. We also consider the scale ambiguity associated with the renormalization of singular contact interactions, and calculate nonuniversal contributions to the energy density.
Article
Computer Science, Interdisciplinary Applications
Travis Whyte, Andreas Stathopoulos, Eloy Romero, Kostas Orginos
Summary: The calculation of disconnected diagram contributions in Lattice QCD is computationally expensive. This article presents a sampling and interpolation scheme that can predict the variances associated with Frequency Splitting under displacements of the lattice, and selects shifts that minimize the cost for trace estimation.
COMPUTER PHYSICS COMMUNICATIONS
(2024)
Article
Astronomy & Astrophysics
P. C. Barry, C. Egerer, J. Karpie, W. Melnitchouk, C. Monahan, K. Orginos, D. Richards, Jian-Wei Qiu, N. Sato, R. S. Sufian, S. Zafeiropoulos
Summary: In this study, pion parton distribution functions were extracted through a Monte Carlo global QCD analysis of experimental data and lattice QCD data. The reduced Ioffe time pseudo-distributions significantly decreased the uncertainties on the PDFs, while the current-current correlators were limited by systematic effects associated with the lattice.
Article
Astronomy & Astrophysics
William Detmold, Anthony Grebe, Issaku Kanamori, C-J David Lin, Santanu Mondal, Robert J. Perry, Yong Zhao
Summary: In this article, the heavy-quark operator product expansion method is numerically implemented for the first time to determine the second Mellin moment of the pion LCDA. The resulting value, obtained at a pion mass of 550 MeV and a factorization scale of 2 GeV in quenched QCD, is 0.210 +/- 0.013(stat) +/- 0.034(sys), which is compatible with previous determinations of this quantity.
Article
Astronomy & Astrophysics
William Detmold, Anthony Grebe, Issaku Kanamori, C-J David Lin, Robert J. Perry, Yong Zhao
Summary: This paper presents theoretical details for calculating PDFs and LCDAs using a heavy-quark operator product expansion method, showing that the operator product expansion can be expressed as the convolution of a perturbative matching kernel and the corresponding light cone distribution. It also provides the one-loop Wilson coefficients for the PDFs and LCDAs, with the coefficients for the LCDAs being new.
Article
Astronomy & Astrophysics
Marc Illa, Silas R. Beane, Emmanuel Chang, Zohreh Davoudi, William Detmold, David J. Murphy, Kostas Orginos, Assumpta Parreno, Martin J. Savage, Phiala E. Shanahan, Michael L. Wagman, Frank Winter
Summary: In this study, interactions between two octet baryons at low energies were investigated using LQCD with larger-than-physical quark masses. The results showed that most systems were bound at this pion mass, except for the repulsive interactions in the spin-triplet Sigma N and Xi Xi channels. Extrapolation of binding energies to the physical point was performed, and constraints on low-energy coefficients in pionless EFT relevant for two-baryon interactions were determined.
Article
Astronomy & Astrophysics
Assumpta Parreno, Phiala E. Shanahan, Michael L. Wagman, Frank Winter, Emmanuel Chang, William Detmold, Marc Illa
Summary: This study investigates the axial charge of the triton using lattice QCD, finding a compact bound state with the quantum numbers of the triton at specific quark masses, and a triton to proton axial charge ratio of 0.91. Results from correlation functions calculations and FVEFT extrapolation show that QCD can explain the modification to the triton's axial charge.
