TY  - EJOUR
AU  - Alexandrou, C.
AU  - Bacchio, S.
AU  - Constantinou, M.
AU  - Dimopoulos, P.
AU  - Finkenrath, J.
AU  - Frezzotti, R.
AU  - Hadjiyiannakou, K.
AU  - Jansen, K.
AU  - Kostrzewa, B.
AU  - Koutsou, G.
AU  - Spanoudes, G.
AU  - Urbach, C.
TI  - First moments of the nucleon transverse quark spin densities using lattice QCD
IS  - arXiv:2202.09871
M1  - PUBDB-2022-05150
M1  - arXiv:2202.09871
PY  - 2022
AB  - 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 unpolarized and transversity generalized form factors extrapolated to the continuum limit using three N<sub>f</sub>=2+1+1 twisted mass fermion gauge ensembles simulated with physical quark masses and spanning three lattice spacings. The first moment of transversely polarized quarks in an unpolarized nucleon shows an interesting distortion, which can be traced back to the sharp falloff of the transversity generalized form factor ―B<sub>Tn0</sub>(t). The isovector tensor anomalous magnetic moment is determined to be κ<sub>T</sub>=1.051(94), which confirms a negative and large Boer-Mulders function, h<sub>1</sub><sup>⊥</sup>, in the nucleon.
KW  - quark: spin: transverse (INSPIRE)
KW  - quark: spin: density (INSPIRE)
KW  - spin: density (INSPIRE)
KW  - fermion: mass: twist (INSPIRE)
KW  - quark: mass (INSPIRE)
KW  - nucleon (INSPIRE)
KW  - lattice field theory (INSPIRE)
KW  - transversity (INSPIRE)
KW  - form factor (INSPIRE)
KW  - magnetic moment (INSPIRE)
KW  - isovector (INSPIRE)
KW  - lattice (INSPIRE)
KW  - moment (INSPIRE)
KW  - continuum limit (INSPIRE)
LB  - PUB:(DE-HGF)25
UR  - https://bib-pubdb1.desy.de/record/483177
ER  -