Impact of Lattice QCD on CKM PhenomenologyPrecise lattice QCD results for hadronic matrix elements, decay constants and form factors play a crucial role in the determination of CKM matrix elements and in the identification of possible new…Monika Blanke·Dec 29, 2016SaveLearn
Heavy-heavy current improvement for calculation of B→ D(*) ν semi-leptonic form factors using the Oktay-Kronfeld actionLattice calculations of the form factors for B D(*)ν decays can be used to extract the CKM matrix element |Vcb|. The Oktay-Kronfeld action is a highly improved version of…Jon A. Bailey, Jaehoon Leem, Weonjong Lee et al.·Dec 29, 2016SaveLearn
Parton Distributions from Lattice QCD with Momentum SmearingIn this work we continue our effort to explore a recent proposal, which allows light-cone distributions to be extracted from purely spatial correlations, being thus accessible to lattice methods. In…Constantia Alexandrou, Krzysztof Cichy, Martha Constantinou et al.·Dec 27, 2016SaveLearn
Antiferromagnetic Ising model in an imaginary magnetic fieldWe study the two-dimensional antiferromagnetic Ising model with a purely imaginary magnetic field, which can be thought of as a toy model for the usual θ physics. Our motivation is to have a…Vicente Azcoiti, Giuseppe Di Carlo, Eduardo Follana et al.·Dec 27, 2016SaveLearn
Hyperon single-particle potentials from QCD on latticeWe study single-particle potential of hyperons in nuclear medium starting from QCD. First we carry out lattice QCD numerical simulation to extract baryon-baryon interactions from QCD by means of the…Takashi Inoue, for HAL QCD Collaboration·Dec 26, 2016SaveLearn
Quark Chromoelectric Dipole Moment Contribution to the Neutron Electric Dipole MomentThe quark chromo-electric dipole moment operator and the pseudo-scalar fermion bilinear with which it mixes under renormalization can both be included in a calculation of the electromagnetic form…Tanmoy Bhattacharya, Vincenzo Cirigliano, Rajan Gupta et al.·Dec 26, 2016SaveLearn
Nucleon-pion-state contribution in lattice calculations of moments of parton distribution functionsWe employ chiral perturbation theory to calculate the nucleon-pion-state contribution to the 3-point correlation functions measured in lattice QCD to compute various moments of parton distribution…Oliver Bar·Dec 26, 2016SaveLearn
Looking at the deconfinement transition using Wilson flowWilson flow is an effective tool for constructing renormalized composite operators. We explore use of the Wilson flow to construct renormalized order parameters for the deconfinement transition in…Saumen Datta, Sourendu Gupta, Andrew Lytle·Dec 23, 2016SaveLearn
Accelerating Lattice QCD Multigrid on GPUs Using Fine-Grained ParallelizationThe past decade has witnessed a dramatic acceleration of lattice quantum chromodynamics calculations in nuclear and particle physics. This has been due to both significant progress in accelerating…M. A. Clark, Bálint Joó, Alexei Strelchenko et al.·Dec 23, 2016SaveLearn
Phase structure of compactified SU(N) gauge theories in magnetic backgroundsWe discuss the properties of non-abelian gauge theories formulated on manifolds with compactified dimensions and in the presence of fermionic fields coupled to magnetic backgrounds. We show that…Massimo D'Elia, Marco Mariti·Dec 22, 2016SaveLearn
New extended interpolating operators for hadron correlation functionsNew extended interpolating operators made of quenched three dimensional fermions are introduced in the context of lattice QCD. The mass of the 3D fermions can be tuned in a controlled way to find a…Francesco Scardino, Mauro Papinutto, Stefan Schaefer·Dec 22, 2016SaveLearn
Strong isospin violation and chiral logarithms in the baryon spectrumWe present a precise lattice QCD calculation of the contribution to the neutron-proton mass splitting arising from strong isospin breaking, mn-mp|QCD=2.320.17 MeV. We also determine…David A. Brantley, Balint Joo, Ekaterina V. Mastropas et al.·Dec 22, 2016SaveLearn
Renormalisation of the scalar energy-momentum tensor with the Wilson flowThe non-perturbative computation of the energy-momentum tensor can be used to study the scaling behaviour of strongly coupled quantum field theories. The Wilson flow is an essential tool to find a…Francesco Capponi, Luigi Del Debbio, Susanne Ehret et al.·Dec 22, 2016SaveLearn
Impact of dynamical charm quarksWe compute and compare the continuum limits of several quantities in QCD with and without a dynamical charm quark. We consider both low energy quantities, like the hadronic scales r0 and t0,…Tomasz Korzec, Francesco Knechtli, Salvatore Cali et al.·Dec 22, 2016SaveLearn
Light-quark contributions to the magnetic form factor of the Lambda(1405)In a recent study of the Lambda(1405), the suppression of the strange-quark contribution to the magnetic form factor was interpreted as the discovery of a dominant antikaon-nucleon composition for…Jonathan M. M. Hall, Waseem Kamleh, Derek B. Leinweber et al.·Dec 22, 2016SaveLearn
On the Feynman-Hellmann Theorem in Quantum Field Theory and the Calculation of Matrix ElementsThe Feynman-Hellmann theorem can be derived from the long Euclidean-time limit of correlation functions determined with functional derivatives of the partition function. Using this insight, we fully…Chris Bouchard, Chia Cheng Chang, Thorsten Kurth et al.·Dec 21, 2016SaveLearn
`t Hooft model on the LatticeLattice results are presented for the meson spectrum of 1+1 dimensional gauge theory at large N, using the Twisted Eguchi-Kawai model. Comparison is made to the results obtained by `t Hooft in the…Margarita García Pérez, Antonio González-Arroyo, Liam Keegan et al.·Dec 21, 2016SaveLearn
Deconfinement, gradient and cooling scales for pure SU(2) lattice gauge theoryWe investigate the approach of pure SU(2) lattice gauge theory with the Wilson action to its continuum limit using the deconfining phase transition, the gradient flow and the cooling flow to set the…Bernd A. Berg, David A. Clarke·Dec 21, 2016SaveLearn
Perturbative O(a2) effects in gradient flow couplings with SF and SF-open boundary conditionsThe gradient flow provides a new class of renormalized observables which can be measured with high precision in lattice simulations. In principle this allows for many interesting applications to…Argia Rubeo, Stefan Sint·Dec 21, 2016SaveLearn
|Vcb| from the B0 D*+ - ν zero-recoil form factor using 2+1+1 flavour HISQ and NRQCDWe present the status of our ongoing calculation of the zero-recoil form factor for the semileptonic decay B0→ D*+l-ν using lattice QCD with 2+1+1 flavours of highly…Judd Harrison, Christine Davies, Matthew Wingate·Dec 20, 2016SaveLearn
Quark number susceptibilities and equation of state at finite chemical potential in staggered QCD with Nt=8We report the measurement of quark number susceptibilities (QNS) and their temperature dependence from simulations of QCD with two flavours of light dynamical staggered quarks at finite temperature…Saumen Datta, Rajiv V. Gavai, Sourendu Gupta·Dec 20, 2016SaveLearn
One-loop calculations in Supersymmetric Lattice QCDWe study the self energies of all particles which appear in a lattice regularization of supersymmetric QCD ( N=1). We compute, perturbatively to one-loop, the relevant two-point Green's…M. Costa, H. Panagopoulos·Dec 20, 2016SaveLearn
Frontiers of finite temperature lattice QCDI review a selection of recent finite temperature lattice results of the past years. First I discuss the extension of the equation of state towards high temperatures and fi- nite densities, then I…Szabolcs Borsanyi·Dec 20, 2016SaveLearn
A performance evaluation of CCS QCD Benchmark on the COMA (Intel(R) Xeon PhiTM, KNC) systemThe most computationally demanding part of Lattice QCD simulations is solving quark propagators. Quark propagators are typically obtained with a linear equation solver utilizing HPC machines. The CCS…Taisuke Boku, Ken-Ichi Ishikawa, Yoshinobu Kuramashi et al.·Dec 20, 2016SaveLearn
On the perturbative renormalisation of four-quark operators for new physicsWe discuss the renormalisation properties of the full set of ΔF=2 operators involved in BSM processes, including the definition of RGI versions of operators that exhibit mixing under RG…Mauro Papinutto, Carlos Pena, David Preti·Dec 19, 2016SaveLearn