C. Alexandrou

Measuring Mass Splittings in Baryon SU(2) Multiplets

Constantia Alexandrou, Simone Bacchio, Antonio Evangelista +2

The inclusion of isospin-breaking corrections arising from electromagnetic interactions and the up-down quark mass difference is becoming increasingly important in lattice QCD calc…

Spin and momentum fraction carried by partons in the nucleon

Constantia Alexandrou, Simone Bacchio, Jacob Finkenrath +6

We determine the momentum fraction and angular momentum carried by quarks and gluons in the proton in lattice QCD. We use four ensembles simulated with up, down, strange and charm…

Nucleon unpolarized second Mellin moments using lattice QCD ensembles with physical quark masses and in the continuum limit

Constantia Alexandrou, Simone Bacchio, Jacob Finkenrath +6

We compute the matrix elements of the energy-momentum tensor of the nucleon using four ensembles of twisted mass clover-improved fermions with the up, down, strange and charm quark…

The nucleon unpolarized generalized form factors and Mellin moments up to fourth order

Constantia Alexandrou, Simone Bacchio, Martha Constantinou +3

Nucleon Mellin moments of parton distribution are computed up to the fourth order in lattice QCD. The computation is performed using one ensemble of twisted mass fermions at the ph…

Performance of Low Mode Averaging on Twisted-Mass Fermion Ensembles at the physical pion mass point

Constantia Alexandrou, Simone Bacchio, Antonio Evangelista +4

We study the performance of low-mode averaging (LMA) on twisted-mass fermion ensembles at near-physical quark masses, assessing both its theoretical framework and practical cost-ef…

Higher Mellin Moments of the Unpolarized PDF of the Pion and the Kaon from Lattice QCD

Constantia Alexandrou, Simone Bacchio, Priyajit Jana +6

We present results on the Mellin moments of the unpolarized parton distribution function (PDF) of the pion and kaon up to the fourth order. The computation is done using one $N_f=2…

Nucleon strange electromagnetic form factors using $N_{f} = 2 + 1 + 1$ twisted-mass fermions at the physical point

Constantia Alexandrou, Simone Bacchio, Mathis Bode +7

We present the strange electromagnetic form factors of the nucleon using lattice QCD with $N_{f} = 2 + 1 + 1$ twisted mass clover-improved fermions and quark masses tuned to their physical…

Scalar and Tensor Form Factors for $Λ \to p ℓ ν ˉ_{ℓ}$ from Lattice QCD

Constantia Alexandrou, Simone Bacchio, Andreas Konstantinou +1

We present a determination of the scalar and tensor $Λ \to p$ transition form factors using lattice QCD. These form factors are relevant for semileptonic hyperon decays in the prese…

Strangeness of nucleons from $N_{f} = 2 + 1 + 1$ lattice QCD

Constantia Alexandrou, Simone Bacchio, Mathis Bode +7

We present the strange electromagnetic form factors of the nucleon using lattice QCD simulations with degenerate light, a strange, and a charm quark in the sea with masses tuned to…

Nucleon strange electromagnetic form factors from $N_{f} = 2 + 1 + 1$ lattice QCD

Constantia Alexandrou, Simone Bacchio, Mathis Bode +7

We present the nucleon strange electromagnetic form factors using four lattice QCD ensembles with $N_{f} = 2 + 1 + 1$ twisted mass clover-improved fermions and quark masses tuned to approx…

Collins-Soper Kernel and Reduced Soft Function in Lattice QCD

Constantia Alexandrou, Simone Bacchio, Krzysztof Cichy +5

We evaluate the Collins-Soper kernel and the reduced soft function in lattice QCD, incorporating $O (α_{s})$ matching corrections. The calculation relies on the evaluation o…

Proton and neutron electromagnetic form factors from lattice QCD in the continuum limit

Constantia Alexandrou, Simone Bacchio, Giannis Koutsou +2

We compute the electromagnetic form factors of the proton and neutron using lattice QCD. We employ $N_{f}$ =2+1+1 twisted mass clover-improved fermions with quark masses tune…

hep-lat2025★ 2 cited

Proton and neutron electromagnetic form factors using $N_{f}$ =2+1+1 twisted-mass fermions with physical values of the quark masses

Constantia Alexandrou, Simone Bacchio, Giannis Koutsou +2

We compute the electromagnetic form factors of the proton and neutron using lattice QCD with $N_{f} = 2 + 1 + 1$ twisted mass clover-improved fermions and quark masses tuned to their…

Isovector axial and pseudoscalar form factors from twisted mass lattice QCD at the physical point

Constantia Alexandrou, Simone Bacchio, Martha Constantinou +6

We present the isovector axial, induced pseudoscalar, and pseudoscalar form factors of the nucleon using three twisted-mass fermion ensembles with degenerate up- and down-, strange…

Nucleon axial, tensor, and scalar charges and $σ$ -terms in lattice QCD

Constantia Alexandrou, Simone Bacchio, Jacob Finkenrath +4

We determine the nucleon axial, scalar and tensor charges at the continuum limit by analyzing three $N_{f} = 2 + 1 + 1$ twisted mass fermion ensembles with all quark masses tuned to approx…

Nucleon charges and $σ$ -terms in lattice QCD

C. Alexandrou, S. Bacchio, J. Finkenrath +4

We determine the nucleon axial, scalar and tensor charges and the nucleon $σ$ -terms using twisted mass fermions. We employ three ensembles with approximately equal physical volume…

Strange and charm quark contributions to the muon anomalous magnetic moment in lattice QCD with twisted-mass fermions

C. Alexandrou, S. Bacchio, A. De Santis +15

We present a lattice calculation of the Hadronic Vacuum Polarization (HVP) contribution of the strange and charm quarks to the anomalous magnetic moment of the muon in isospin symm…

$b ˉ b ˉ u d$ and $b ˉ b ˉ u s$ tetraquarks from lattice QCD using symmetric correlation matrices with both local and scattering interpolating operators

Constantia Alexandrou, Jacob Finkenrath, Theodoros Leontiou +3

We study the $b ˉ b ˉ u d$ tetraquark with quantum numbers $I (J^{P}) = 0 (1^{+})$ as well as the $b ˉ b ˉ u s$ tetraquark with quantum numbers $J^{P} = 1^{+}$ using lattice QCD.…