INVESTIGADORES
DE FLORIAN daniel Enrique
artículos
Título:
Evidence for polarization of gluons in protons
Autor/es:
DANIEL DE FLORIAN, M.STRATMANN, R.SASSOT, W.VOEGELSANG
Revista:
PHYSICAL REVIEW LETTERS
Editorial:
AMER PHYSICAL SOC
Referencias:
Lugar: New York; Año: 2014 vol. 113 p. 1 - 1
ISSN:
0031-9007
Resumen:
We discuss the impact of recent high-statistics Relativistic Heavy Ion Collider data on the determination of the gluon polarization in the proton in the context of a global QCD analysis of polarized parton distributions. We find evidence for a nonvanishing polarization of gluons in the region of momentum fraction and at the scales mostly probed by the data. Although information from low momentum fractions is presently lacking, this finding is suggestive of a significant contribution of gluon spin to the proton spin, thereby limiting the amount of orbital angular momentum required to balance the proton spin budget.