198 citations · 543 across the 9 of their papers we have counts for
14 papers · 1 filter
The nucleon spin and momentum decomposition using lattice QCD simulations
C. Alexandrou, M. Constantinou, K. Hadjiyiannakou +5
We determine within lattice QCD, the nucleon spin carried by valence and sea quarks, and gluons. The calculation is performed using an ensemble of gauge configurations with two deg…
Parton Distributions from Lattice QCD with Momentum Smearing
Constantia Alexandrou, Krzysztof Cichy, Martha Constantinou +4
In 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 l…
Nucleon spin and quark content at the physical point
C. Alexandrou, M. Constantinou, K. Hadjiyiannakou +5
We present results on the spin and quark content of the nucleon using twisted mass clover-improved fermion simulations with a pion mass close to its physical value. We use…
Gluon momentum fraction of the nucleon from lattice QCD
Constantia Alexandrou, Martha Constantinou, Kyriakos Hadjiyiannakou +3
We perform a direct calculation of the gluon momentum fraction of the nucleon using maximally twisted mass fermion ensembles with flavors at a pion mass of about $370\,…
Updated Lattice Results for Parton Distributions
Constantia Alexandrou, Krzysztof Cichy, Martha Constantinou +4
We provide an analysis of the x-dependence of the bare unpolarized, helicity and transversity iso-vector parton distribution functions (PDFs) from lattice calculations employing (m…
Recent results for the proton spin decomposition from lattice QCD
Constantia Alexandrou, Martha Constantinou, Kyriakos Hadjiyiannakou +7
The 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-pe…
A Lattice Calculation of Parton Distributions
Constantia Alexandrou, Krzysztof Cichy, Kyriakos Hadjiyiannakou +3
We present results for the dependence of the unpolarized, helicity, and transversity isovector quark distributions in the proton using lattice QCD, employing the method of quas…
A Lattice Calculation of Parton Distributions
Constantia Alexandrou, Krzysztof Cichy, Vincent Drach +5
We report on our exploratory study for the direct evaluation of the parton distribution functions from lattice QCD, based on a recently proposed new approach. We present encouragin…
First results with twisted mass fermions towards the computation of parton distribution functions on the lattice
Constantia Alexandrou, Krzysztof Cichy, Vincent Drach +5
We report on our exploratory study for the evaluation of the parton distribution functions from lattice QCD, based on a new method proposed in Ref.~arXiv:1305.1539. Using the examp…
Looking at the gluon moment of the nucleon with dynamical twisted mass fermions
Constantia Alexandrou, Vincent Drach, Kyriakos Hadjiyiannakou +3
To understand the structure of hadrons it is important to know the PDF of their constituents, the quarks and gluons. In our work we aim to compute the first moment of the gluon PDF…
Scalar mesons and tetraquarks from twisted mass lattice QCD
Marc Wagner, Constantia Alexandrou, Jan Oliver Daldrop +5
We study light scalar mesons with particular focus on the a_0(980) using lattice QCD with 2+1+1 dynamical quark flavors. To investigate the structure of these scalar mesons and to…
Scalar mesons and tetraquarks by means of lattice QCD
Marc Wagner, Constantia Alexandrou, Jan Oliver Daldrop +5
We study the light scalar mesons a_0(980) and kappa using N_f = 2+1+1 flavor lattice QCD. In order to probe the internal structure of these scalar mesons, and in particular to iden…
The static-light baryon spectrum from twisted mass lattice QCD
Marc Wagner, Christian Wiese
We compute the static-light baryon spectrum by means of Wilson twisted mass lattice QCD using N_f = 2 flavors of sea quarks. As light u/d valence quarks we consider quarks, which h…
The spectrum of static-light baryons in twisted mass lattice QCD
Marc Wagner, Christian Wiese
We compute the static-light baryon spectrum with N_f = 2 flavors of sea quarks using Wilson twisted mass lattice QCD. As light valence quarks we consider quarks, which have the sam…