Search Results - "Hadjiyiannakou, K"

Nucleon Spin and Momentum Decomposition Using Lattice QCD Simulations by Alexandrou, C, Constantinou, M, Hadjiyiannakou, K, Jansen, K, Kallidonis, C, Koutsou, G, Avilés-Casco, A Vaquero, Wiese, C

“…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…”
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Direct Evaluation of the Quark Content of Nucleons from Lattice QCD at the Physical Point by Abdel-Rehim, A, Alexandrou, C, Constantinou, M, Hadjiyiannakou, K, Jansen, K, Kallidonis, Ch, Koutsou, G, Avilés-Casco, A Vaquero

“…We evaluate the light, strange, and charm scalar content of the nucleon using one lattice QCD ensemble generated with two degenerate light quarks with mass…”
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Nucleon and pion structure with lattice QCD simulations at physical value of the pion mass by Abdel-Rehim, A., Alexandrou, C., Constantinou, M., Dimopoulos, P., Frezzotti, R., Hadjiyiannakou, K., Jansen, K., Kallidonis, Ch, Kostrzewa, B., Koutsou, G., Mangin-Brinet, M., Oehm, M., Rossi, G. C., Urbach, C., Wenger, U.

“…We present results on the nucleon scalar, axial, and tensor charges as well as on the momentum fraction, and the helicity and transversity moments. The pion…”
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Evaluation of disconnected quark loops for hadron structure using GPUs by Alexandrou, C., Constantinou, M., Drach, V., Hadjiyiannakou, K., Jansen, K., Koutsou, G., Strelchenko, A., Vaquero, A.

“…A number of stochastic methods developed for the calculation of fermion loops are investigated and compared, in particular with respect to their efficiency…”
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Evaluation of fermion loops applied to the calculation of the mass and the nucleon scalar and electromagnetic form factors by Alexandrou, C., Hadjiyiannakou, K., Koutsou, G., OʼCais, A., Strelchenko, A.

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Disconnected quark loop contributions to nucleon observables in lattice QCD by Abdel-Rehim, A., Alexandrou, C., Constantinou, M., Drach, V., Hadjiyiannakou, K., Jansen, K., Koutsou, G., Vaquero, A.

“…We perform a high statistics calculation of disconnected fermion loops on graphics processing units for a range of nucleon matrix elements extracted using…”
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Evaluation of fermion loops applied to the calculation of the η′ mass and the nucleon scalar and electromagnetic form factors by Alexandrou, C., Hadjiyiannakou, K., Koutsou, G., OʼCais, A., Strelchenko, A.

“…The exact evaluation of the disconnected diagram contributions to the flavor-singlet pseudo-scalar meson mass, the nucleon σ-term and the nucleon…”
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Non-perturbative renormalization of quark and gluon operators using a gauge-invariant scheme by Spanoudes, G, Alexandrou, C, Finkenrath, J, Hadjiyiannakou, K, Panagopoulos, H, Yamamoto, S

“…We present preliminary results for the renormalization functions (RFs) of a number of quark and gluon operators studied in lattice QCD using a gauge-invariant…”
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Neutron electric dipole moment using lattice QCD simulations at the physical point by Alexandrou, C, Athenodorou, A, Hadjiyiannakou, K, Todaro, A

“…Phys. Rev. D 103, 054501 (2021) We extract the neutron electric dipole moment $\vert \vec{d}_N\vert$ within the lattice QCD formalism. We analyse one ensemble…”
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Flavor decomposition for the proton helicity parton distribution functions by Alexandrou, C, Constantinou, M, Hadjiyiannakou, K, Jansen, K, Manigrasso, F

“…Phys. Rev. Lett. 126, 102003 (2021) We present, for the first time, an \textit{ab initio} calculation of the individual up, down and strange quark helicity…”
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Quark flavor decomposition of the nucleon axial form factors by Alexandrou, C, Bacchio, S, Constantinou, M, Hadjiyiannakou, K, Jansen, K, Koutsou, G

“…Phys. Rev. D 104, 074503 (2021) We present results on the isoscalar form factors including the disconnected contributions, as well as on the strange and charm…”
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Pion Transition Form Factor from Twisted-Mass Lattice QCD and the Hadronic Light-by-Light $\pi^0$-pole Contribution to the Muon $g-2 by Alexandrou, C, Bacchio, S, Bergner, G, Burri, S, Finkenrath, J, Gasbarro, A, Hadjiyiannakou, K, Jansen, K, Kanwar, G, Kostrzewa, B, Koutsou, G, Ottnad, K, Petschlies, M, Pittler, F, Steffens, F, Urbach, C, Wenger, U

“…Phys.Rev.D 108 (2023) 9, 094514 The neutral pion generates the leading pole contribution to the hadronic light-by-light tensor, which is given in terms of the…”
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First moments of the nucleon transverse quark spin densities using lattice QCD by Alexandrou, C, Bacchio, S, Constantinou, M, Dimopoulos, P, Finkenrath, J, Frezzotti, R, Hadjiyiannakou, K, Jansen, K, Kostrzewa, B, Koutsou, G, Spanoudes, G, Urbach, C

“…We present a calculation of the Mellin moments of the transverse quark spin densities in the nucleon using lattice QCD. The densities are extracted from the…”
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Time windows of the muon HVP from twisted-mass lattice QCD by Alexandrou, C, Bacchio, S, Dimopoulos, P, Finkenrath, J, Frezzotti, R, Gagliardi, G, Garofalo, M, Hadjiyiannakou, K, Kostrzewa, B, Jansen, K, Lubicz, V, Petschlies, M, Sanfilippo, F, Simula, S, Urbach, C, Wenger, U

“…We present a lattice determination of the leading-order hadronic vacuum polarization (HVP) contribution to the muon anomalous magnetic moment, $a_{\mu}^{\rm…”
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Lattice calculation of the short and intermediate time-distance hadronic vacuum polarization contributions to the muon magnetic moment using twisted-mass fermions by Alexandrou, C, Bacchio, S, Dimopoulos, P, Finkenrath, J, Frezzotti, R, Gagliardi, G, Garofalo, M, Hadjiyiannakou, K, Kostrzewa, B, Jansen, K, Lubicz, V, Petschlies, M, Sanfilippo, F, Simula, S, Urbach, C, Wenger, U

“…We present a lattice determination of the leading-order hadronic vacuum polarization (HVP) contribution to the muon anomalous magnetic moment, $a_{\mu}^{\rm…”
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Axial charges of hyperons and charmed baryons using $N_f=2+1+1$ twisted mass fermions by Alexandrou, C, Hadjiyiannakou, K, Kallidonis, Ch

“…Phys. Rev. D 94, 034502 (2016) The axial couplings of the low lying baryons are evaluated using a total of five ensembles of dynamical twisted mass fermion…”
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Nucleon strange electromagnetic form factors by Alexandrou, C, Bacchio, S, Constantinou, M, Finkenrath, J, Hadjiyiannakou, K, Jansen, K, Koutsou, G

“…Phys. Rev. D 101, 031501 (2020) The role of the strange quarks on the low-energy interactions of the proton can be probed through the strange electromagnetic…”
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Nucleon axial, tensor and scalar charges and $\sigma$-terms in lattice QCD by Alexandrou, C, Bacchio, S, Constantinou, M, Hadjiyiannakou, K, Jansen, K, Koutsou, G, Aviles-Casco, A. Vaquero

“…Phys. Rev. D 102, 054517 (2020) We determine the nucleon axial, scalar and tensor charges within lattice Quantum Chromodynamics including all contributions…”
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Complete flavor decomposition of the spin and momentum fraction of the proton using lattice QCD simulations at physical pion mass by Alexandrou, C, Bacchio, S, Constantinou, M, Finkenrath, J, Hadjiyiannakou, K, Jansen, K, Koutsou, G, Panagopoulos, H, Spanoudes, G

“…We evaluate the gluon and quark contributions to the spin of the proton using an ensemble of gauge configuration generated at physical pion mass. We compute…”
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Nucleon axial and pseudoscalar form factors from lattice QCD at the physical point by Alexandrou, C, Bacchio, S, Constantinou, M, Dimopoulos, P, Finkenrath, J, Hadjiyiannakou, K, Jansen, K, Koutsou, G, Kostrzewa, B, Leontiou, T, Urbach, C

“…Phys. Rev. D 103, 034509 (2021) We compute the nucleon axial and induced pseudoscalar form factors using three ensembles of gauge configurations, generated…”
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