Longitudinal and transverse spin asymmetries for inclusive jet production at mid-rapidity in polarized p+p collisions at root s=200 GeV

Aschenauer, E.; Barnovska, Z.; Bruna, E.; Gliske, S.; Sarkar, A.; Seele, J.; Ullrich, T; STAR Collaboration

Abstract

We report STAR measurements of the longitudinal double-spin asymmetry A(LL), the transverse singlespin asymmetry A(N), and the transverse double-spin asymmetries A(Sigma) and A(TT) for inclusive jet production at mid-rapidity in polarized p + p collisions at a center-of-mass energy of root s = 200 GeV. The data represent integrated luminosities of 7.6 pb(-1) with longitudinal polarization and 1.8 pb(-1) with transverse polarization, with 50%-55% beam polarization, and were recorded in 2005 and 2006. No evidence is found for the existence of statistically significant jet A(N), A(Sigma), or A(TT) at mid-rapidity. Recent model calculations indicate the A(N) results may provide new limits on the gluon Sivers distribution in the proton. The asymmetry A(LL) significantly improves the knowledge of gluon polarization in the nucleon.

Más información

Título según WOS: ID WOS:000307330100001 Not found in local WOS DB
Título de la Revista: PHYSICAL REVIEW D
Volumen: 86
Número: 3
Editorial: American Physical Society
Fecha de publicación: 2012
DOI:

10.1103/PhysRevD.86.032006

Notas: ISI