Quark and gluon momentum fractions in the pion from $N_f=2+1+1$ lattice QCD
| Autor: | Alexandrou, Constantia, Bacchio, Simone, Pittler, Ferenc, Steffens, Fernanda, Urbach, Carsten, Wenger, Urs, Mass, Extended Twisted, Bergner, Georg, Finkenrath, Jacob, Gasbarro, Andrew, Hadjiyiannakou, Kyriakos, Jansen, Karl, Kostrzewa, Bartosz, Ottnad, Konstantin, Petschlies, Marcus |
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| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
pi: momentum
clover [fermion] High Energy Physics::Lattice FOS: Physical sciences hep-lat mass: twist mass [pi] momentum [gluon] pi: mass fermion: clover quark sum rule: momentum High Energy Physics - Phenomenology (hep-ph) High Energy Physics - Lattice twist [mass] ddc:530 Particle Physics - Phenomenology momentum [sum rule] High Energy Physics - Lattice (hep-lat) lattice field theory momentum [pi] hep-ph Particle Physics - Lattice High Energy Physics - Phenomenology High Energy Physics::Experiment gluon: momentum |
| Zdroj: | Physical review letters 127(25), 252001 (2021). doi:10.1103/PhysRevLett.127.252001 |
| DOI: | 10.1103/PhysRevLett.127.252001 |
| Popis: | Physical review letters 127(25), 252001 (2021). doi:10.1103/PhysRevLett.127.252001 We perform the first full decomposition of the pion momentum into its gluon and quark contributions. We employ an ensemble generated by the Extended Twisted Mass Collaboration with $N_f=2+1+1$ Wilson twisted mass clover fermions at maximal twist tuned to reproduce the physical pion mass. We present our results in the $\overline{MS}$ scheme at 2 GeV. We find $���x���_{u+d}=0.601(28), ���x���_s=0.059(13), ���x���_c=0.019(05)$, and $���x���_g=0.52(11)$ for the separate contributions, respectively, whose sum saturates the momentum sum rule. Published by APS, College Park, Md. |
| Databáze: | OpenAIRE |
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