TY  - JOUR
AU  - Alexandrou, Constantia
AU  - Bacchio, Simone
AU  - Bergner, Georg
AU  - Finkenrath, Jacob
AU  - Gasbarro, Andrew
AU  - Hadjiyiannakou, Kyriakos
AU  - Jansen, Karl
AU  - Kostrzewa, Bartosz
AU  - Ottnad, Konstantin
AU  - Petschlies, Marcus
AU  - Pittler, Ferenc
AU  - Steffens, Fernanda
AU  - Urbach, Carsten
AU  - Wenger, Urs
TI  - Quark and Gluon Momentum Fractions in the Pion from N<sub>f</sub>=2+1+1 Lattice QCD
JO  - Physical review letters
VL  - 127
IS  - 25
SN  - 0031-9007
CY  - College Park, Md.
PB  - APS
M1  - PUBDB-2021-05530
M1  - arXiv:2109.10692
SP  - 252001
PY  - 2021
AB  - 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<sub>f</sub>=2+1+1 Wilson twisted mass clover fermions at maximal twist tuned to reproduce the physical pion mass. We present our results in the ―MS scheme at 2 GeV. We find ⟨x⟩<sub>u+d</sub>=0.601(28), ⟨x⟩<sub>s</sub>=0.059(13), ⟨x⟩<sub>c</sub>=0.019(05), and ⟨x⟩<sub>g</sub>=0.52(11) for the separate contributions, respectively, whose sum saturates the momentum sum rule.
KW  - mass: twist (INSPIRE)
KW  - gluon: momentum (INSPIRE)
KW  - fermion: clover (INSPIRE)
KW  - pi: mass (INSPIRE)
KW  - sum rule: momentum (INSPIRE)
KW  - pi: momentum (INSPIRE)
KW  - quark (INSPIRE)
KW  - lattice field theory (INSPIRE)
LB  - PUB:(DE-HGF)16
C6  - 35029455
UR  - <Go to ISI:>//WOS:000731420800002
DO  - DOI:10.1103/PhysRevLett.127.252001
UR  - https://bib-pubdb1.desy.de/record/473191
ER  -