Exploring Nf=2+1 QCD thermodynamics from the gradient flowThe energy-momentum tensor plays an important role in QCD thermodynamics. Its expectation value contains information of the pressure and the energy density as its diagonal part. Further properties…Yusuke Taniguchi, Shinji Ejiri, Ryo Iwami et al.·Sep 6, 2016SaveLearn
Topology in the SU(Nf) chiral symmetry restored phase of unquenched QCD and axion cosmologyWe investigate the topological properties of unquenched QCD on the basis of numerical results of simulations at fixed topological charge, recently reported by Borsanyi et al.. We demonstrate that…Vicente Azcoiti·Sep 5, 2016SaveLearn
Including heavy spin effects in a lattice QCD study of static-static-light-light tetraquarksIn previous works we predicted the existence of a b b u d tetraquark with quantum numbers I(JP) = 0(1+) using the static approximation for the b quarks and neglecting heavy…Pedro Bicudo, Jonas Scheunert, Marc Wagner·Sep 2, 2016SaveLearn
On reweighting for twisted boundary conditionsWe consider the possibility of using reweighting techniques in order to correct for the breaking of unitarity when twisted boundary conditions are imposed on valence fermions in simulations of…Andrea Bussone, Michele Della Morte, Martin Hansen et al.·Sep 1, 2016SaveLearn
Abelian color cycles: a new approach to strong coupling expansion and dual representations for non-abelian lattice gauge theoryWe propose a new approach to strong coupling series and dual representations for non-abelian lattice gauge theories using the SU(2) case as an example. The Wilson gauge action is written as a sum…Christof Gattringer, Carlotta Marchis·Sep 1, 2016SaveLearn
Recent results for the proton spin decomposition from lattice QCDThe exact decomposition of the proton spin has been a much debated topic, on the experimental as well as the theoretical side. In this talk we would like to report on recent non-perturbative results…Constantia Alexandrou, Martha Constantinou, Kyriakos Hadjiyiannakou et al.·Sep 1, 2016SaveLearn
Lattice QCD study of heavy-heavy-light-light tetraquark candidatesWe investigate heavy-light four-quark systems ud b b with bottom quarks of finite mass which are treated in the framework of NRQCD. We focus on I(JP)=0(1+), where we recently found…Antje Peters, Pedro Bicudo, Luka Leskovec et al.·Sep 1, 2016SaveLearn
A Lattice Calculation of Parton DistributionsWe present results for the x dependence of the unpolarized, helicity, and transversity isovector quark distributions in the proton using lattice QCD, employing the method of quasi-distributions…Constantia Alexandrou, Krzysztof Cichy, Kyriakos Hadjiyiannakou et al.·Sep 1, 2016SaveLearn
Setting the scale for the CLS 2 + 1 flavor ensemblesWe present measurements of a combination of the decay constants of the light pseudoscalar mesons and the gradient flow scale t0, which allow to set the scale of the lattices generated by CLS with…Mattia Bruno, Tomasz Korzec, Stefan Schaefer·Aug 31, 2016SaveLearn
Lattice QCD calculation of form factors for Λb Λ(1520) + - decaysExperimental results for mesonic b s μ+ μ- decays show a pattern of deviations from Standard-Model predictions, which could be due to new fundamental physics or due to an insufficient…Stefan Meinel, Gumaro Rendon·Aug 29, 2016SaveLearn
A massive momentum-subtraction schemeWe introduce a new massive renormalization scheme, denoted mSMOM, as a modification of the existing RI/SMOM scheme. We use SMOM for defining renormalized fermion bilinears in QCD at non-vanishing…Peter Boyle, Luigi Del Debbio, Ava Khamseh·Aug 29, 2016SaveLearn
Flux tubes at Finite TemperatureWe show the flux tubes produced by static quark-antiquark, quark-quark and quark-gluon charges at finite temperature. The sources are placed in the lattice with fundamental and adjoint Polyakov…Pedro Bicudo, Nuno Cardoso, Marco Cardoso·Aug 27, 2016SaveLearn
First exploratory calculation of the long-distance contributions to the rare kaon decays Kπ+-The rare decays of a kaon into a pion and a charged lepton/antilepton pair proceed via a flavour changing neutral current and therefore may only be induced beyond tree level in the Standard Model.…Norman H. Christ, Xu Feng, Andreas Juttner et al.·Aug 26, 2016SaveLearn
Studying the ρ resonance parameters with staggered fermionsWe deliver a lattice study of ρ resonance parameters with p-wave ππ scattering phases, which are extracted by finite-size methods at one center-of-mass frame and four moving frames for six MILC…Ziwen Fu, Lingyun Wang·Aug 26, 2016SaveLearn
A hidden classical symmetry of QCDThe classical part of the QCD partition function (the integrand) has, ignoring irrelevant exact zero modes of the Dirac operator, a local SU(2NF) ⊃ SU(NF)L × SU(NF)R × U(1)A…L. Ya. Glozman·Aug 25, 2016SaveLearn
On the strength of the UA(1) anomaly at the chiral phase transition in Nf=2 QCDWe study the thermal transition of QCD with two degenerate light flavours by lattice simulations using O(a)-improved Wilson quarks. Temperature scans are performed at a fixed value of $Nt =…Bastian B. Brandt, Anthony Francis, Harvey B. Meyer et al.·Aug 24, 2016SaveLearn
Hadro-quarkonium from Lattice QCDThe hadro-quarkonium picture [S. Dubinskiy and M.B. Voloshin, Phys. Lett. B 666, 344 (2008)] provides one possible interpretation for the pentaquark candidates with hidden charm, recently reported by…Maurizio Alberti, Gunnar S. Bali, Sara Collins et al.·Aug 23, 2016SaveLearn
Gribov horizon and Gribov copies effect in lattice Coulomb gaugeFollowing a recent proposal by Cooper and Zwanziger we investigate via SU(2) lattice simulations the effect on the Coulomb gauge propagators and on the Gribov-Zwanziger confinement mechanism of…Giuseppe Burgio, Markus Quandt, Hugo Reinhardt et al.·Aug 20, 2016SaveLearn
Neutrinoless double beta decay from lattice QCDWhile the discovery of non-zero neutrino masses is one of the most important accomplishments by physicists in the past century, it is still unknown how and in what form these masses arise. Lepton…Amy Nicholson, Evan Berkowitz, Chia Cheng Chang et al.·Aug 16, 2016SaveLearn
Topological Visualisation techniques for the understanding of Lattice Quantum Chromodynamics (LQCD) simulationsThe use of topology for visualisation applications has become increasingly popular due to its ability to summarise data at a high level. Criticalities in scalar field data are used by visualisation…Dean P Thomas, Rita Borgo, Simon Hands·Aug 15, 2016SaveLearn
Determination of the properties of vector mesons in external magnetic field by Quenched SU(3) Lattice QCDWe investigate the ground state energies of vector ρ and K * mesons depending on the magnetic field value in the SU(3) lattice gauge theory. It has been shown that the energy of a…E. V. Luschevskaya, O. E. Solovjeva, O. V. Teryaev·Aug 11, 2016SaveLearn
Fermion Bag Approach for Massive Thirring Model at Finite DensityWe consider the 2+1 dimensional massive Thirring model with one flavor at finite density. Two numerical methods, fermion bag approach and complex Langevin dynamics, are used to calculate the chiral…Daming Li·Aug 10, 2016SaveLearn
Search for low-lying lattice QCD eigenstates in the Roper regimeThe positive-parity nucleon spectrum is explored in 2 + 1-flavour lattice QCD in a search for new low-lying energy eigenstates near the energy regime of the Roper resonance. In addition to…Adrian L. Kiratidis, Waseem Kamleh, Derek B. Leinweber et al.·Aug 10, 2016SaveLearn
Overcoming the sign problem in 1-dimensional QCD by new integration rules with polynomial exactnessIn this paper we describe a new integration method for the groups U(N) and SU(N), for which we verified numerically that it is polynomially exact for N 3. The method is applied to the…A. Ammon, T. Hartung, K. Jansen et al.·Aug 10, 2016SaveLearn
Non-perturbative running of renormalization constants from correlators in coordinate space using step scalingWorking in a quenched setup with Wilson twisted mass valence fermions, we explore the possibility to compute non-perturbatively the step scaling function using the coordinate (X-space)…Krzysztof Cichy, Karl Jansen, Piotr Korcyl·Aug 8, 2016SaveLearn