Topology and axions in QCDQCD axions are at the crossroads of QCD topology and Dark Matter searches. We present here the current status of topological studies on the lattice, and their implication on axion physics. We outline…Maria Paola Lombardo, Anton Trunin·May 13, 2020SaveLearn
From string breaking to quarkonium spectrumWe present a preliminary computation of potentials between two static quarks in nf=2 QCD with O(a) improved Wilson fermions. We explore different smearing choices (HYP, HYP2 and APE) and their…Marco Catillo, Marina Krstić Marinković, Pedro Bicudo et al.·May 12, 2020SaveLearn
FK / Fπ from M\"obius domain-wall fermions solved on gradient-flowed HISQ ensemblesWe report the results of a lattice quantum chromodynamics calculation of FK/Fπ using M\"obius domain-wall fermions computed on gradient-flowed Nf=2+1+1 highly-improved staggered quark…Nolan Miller, Henry Monge-Camacho, Chia Cheng Chang et al.·May 10, 2020SaveLearn
Tensor renormalization group approach to four-dimensional complex φ4 theory at finite densityTensor network is an attractive approach to field theory with negative sign problem. The complex φ4 theory at finite density is a test bed for numerical algorithms to verify their…Shinichiro Akiyama, Daisuke Kadoh, Yoshinobu Kuramashi et al.·May 10, 2020SaveLearn
Smooth flux-sheets with topological winding modesThe inclusion of the Gaussian-curvature term in the bulk of Polyakov-Kleinert string action renders new boundary terms and conditions by Gauss-Bonnet theorem. Within a leading approximation, the…A. Bakry, M. Deliyergiyev, A. Galal et al.·May 10, 2020SaveLearn
Short flow-time coefficients of CP-violating operatorsMeasurements of a permanent neutron electric dipole moment (EDM) potentially probe Beyond-the-Standard Model (BSM) sources of CP-violation. At low energy the CP-violating BSM interactions are…Matthew D. Rizik, Christopher J. Monahan, Andrea Shindler·May 8, 2020SaveLearn
Flavor non-singlet parton distribution functions from lattice QCD at physical quark masses via the pseudo-distribution approachOne of the great challenges of QCD is to determine the partonic structure of the nucleon from first principles. In this work, we provide such a determination of the flavor non-singlet (u-d)…Manjunath Bhat, Krzysztof Cichy, Martha Constantinou et al.·May 5, 2020SaveLearn
Finite-volume formalism in the 2 []HI+HI 2 transition: an application to the lattice QCD calculation of double beta decaysWe present the formalism for connecting a second-order electroweak 2[]HI+HI2 transition amplitudes in the finite volume (with two hadrons in the initial and final states) to the…Xu Feng, Lu-Chang Jin, Zi-Yu Wang et al.·May 5, 2020SaveLearn
Monte-Carlo simulations of overlap Majorana fermionsSupersymmetric Yang-Mills (SYM) theories in four dimensions exhibit many interesting non-perturbative phenomena that can be studied by means of Monte Carlo lattice simulations. However, the lattice…S. Piemonte, G. Bergner, C. López·May 5, 2020SaveLearn
Charmonium properties from lattice QCD + QED: hyperfine splitting, J/ leptonic width, charm quark mass and aμcWe have performed the first nf = 2+1+1 lattice QCD computations of the properties (masses and decay constants) of ground-state charmonium mesons. Our calculation uses the HISQ action to generate…D. Hatton, C. T. H. Davies, B. Galloway et al.·May 4, 2020SaveLearn
Ward identity determination of ZS/ZP for Nf=3 lattice QCD in a Schr\"odinger functional setupWe derive chiral Ward identities for lattice QCD with Wilson quarks and Nf ≥ 3 flavours, on small lattices with Schr\"odinger functional boundary conditions and vanishingly small quark…Jochen Heitger, Fabian Joswig, Anastassios Vladikas·May 4, 2020SaveLearn
Few-body bound states and resonances in finite volumeSince the pioneering work of Lüscher in the 1980s it is well known that considering quantum systems in finite volume, specifically, finite periodic boxes, can be used as a powerful computational tool…Sebastian König·May 4, 2020SaveLearn
Probing nucleon strange and charm distributions with lattice QCDWe present the first lattice-QCD calculation of the unpolarized strange and charm parton distribution functions using large-momentum effective theory (LaMET). We use a lattice ensemble with 2+1+1…Rui Zhang, Huey-Wen Lin, Boram Yoon·May 3, 2020SaveLearn
Composite electroweak sectors on the latticeIn the post-Higgs discovery era, the primary goal of the Large Hadron collider is to discover new physics Beyond the Standard Model. One fundamental question is does new beyond the Standard Model…V. Drach·May 3, 2020SaveLearn
Nf=2+1 QCD thermodynamics with gradient flow using two-loop matching coefficientsWe study thermodynamic properties of Nf=2+1 QCD on the lattice adopting O(a)-improved Wilson quark action and Iwasaki gauge action. To cope with the problems due to explicit violation of the Poincare…Yusuke Taniguchi, Shinji Ejiri, Kazuyuki Kanaya et al.·May 1, 2020SaveLearn
Complex Langevin analysis of 2D U(1) gauge theory on a torus with a θ termMonte Carlo simulation of gauge theories with a θ term is known to be extremely difficult due to the sign problem. Recently there has been major progress in solving this problem based on the idea…Mitsuaki Hirasawa, Akira Matsumoto, Jun Nishimura et al.·Apr 29, 2020SaveLearn
Color dependence of tensor and scalar glueball masses in Yang-Mills theoriesWe report the masses of the lightest spin-0 and spin-2 glueballs obtained in an extensive lattice study of the continuum and infinite volume limits of Sp(Nc) gauge theories for Nc=2,4,6,8. We…Ed Bennett, Jack Holligan, Deog Ki Hong et al.·Apr 23, 2020SaveLearn
New approach to lattice QCD at finite density; results for the critical end point on coarse latticesAll approaches currently used to study finite baryon density lattice QCD suffer from uncontrolled systematic uncertainties in addition to the well-known sign problem. We formulate and test an…Matteo Giordano, Kornel Kapas, Sandor D. Katz et al.·Apr 22, 2020SaveLearn
On the generalised eigenvalue method and its relation to Prony and generalised pencil of function methodsWe discuss the relation of three methods to determine energy levels in lattice QCD simulations: the generalised eigenvalue, the Prony and the generalised pencil of function methods. All three can be…Matthias Fischer, Bartosz Kostrzewa, Johann Ostmeyer et al.·Apr 22, 2020SaveLearn
New term in effective field theory at fixed topologyA random matrix model for lattice QCD which takes into account the positive definite nature of the Wilson term is introduced. The corresponding effective theory for fixed index of the Wilson Dirac…M. Kieburg, M. Lauritzen, B. T. Søgaard et al.·Apr 22, 2020SaveLearn
Computing Nucleon Electric Dipole Moment from lattice QCDElectric dipole moments (EDMs) of nucleons and nuclei are actively considered as direct evidence of the CP violation. Calculations of nucleon EDMs on lattice are required to connect the quark- and…Taku Izubuchi, Hiroshi Ohki, Sergey Syritsyn·Apr 22, 2020SaveLearn
Topological susceptibility in QCD with two flavors and 3-5 colors -- a pilot studyI present a calculation of the topological susceptibility χT in SU(Nc) gauge theory with Nc=3-5 colors and Nf=2 degenerate flavors of fermions. The results lie on a common curve when…Thomas DeGrand·Apr 20, 2020SaveLearn
Direct CP violation and the I=1/2 rule in Kππ decay from the Standard ModelWe present a lattice QCD calculation of the I=1/2, Kππ decay amplitude A0 and ', the measure of direct CP-violation in Kππ decay, improving our 2015…Ryan Abbott, Thomas Blum, Peter A. Boyle et al.·Apr 20, 2020SaveLearn
Charmed baryon spectrum from lattice QCD near the physical pointWe calculate the low-lying spectrum of charmed baryons in lattice QCD on the 323×64, Nf=2+1 PACS-CS gauge configurations at the almost physical pion mass of 156 MeV/c2. By…Huseyin Bahtiyar, Kadir Utku Can, Guray Erkol et al.·Apr 20, 2020SaveLearn
Magnetic susceptibility of QCD matter and its decomposition from the latticeWe determine the magnetic susceptibility of thermal QCD matter by means of first principles lattice simulations using staggered quarks with physical masses. A novel method is employed that only…Gunnar S. Bali, Gergely Endrődi, Stefano Piemonte·Apr 19, 2020SaveLearn