TY - JOUR
T1 - Longitudinal double-spin asymmetry for inclusive jet and dijet production in pp collisions at s =510 GeV
AU - Adam, J.
AU - Adamczyk, L.
AU - Adams, J. R.
AU - Adkins, J. K.
AU - Kabana, S.
AU - (STAR Collaboration)
N1 - Publisher Copyright:
© 2019 authors. Published by the American Physical Society.
PY - 2019/9/9
Y1 - 2019/9/9
N2 - We report the first measurement of the inclusive jet and the dijet longitudinal double-spin asymmetries, ALL, at midrapidity in polarized pp collisions at a center-of-mass energy s=510 GeV. The inclusive jet ALL measurement is sensitive to the gluon helicity distribution down to a gluon momentum fraction of x≈0.015, while the dijet measurements, separated into four jet-pair topologies, provide constraints on the x dependence of the gluon polarization. Both results are consistent with previous measurements made at s=200 GeV in the overlapping kinematic region, x>0.05, and show good agreement with predictions from recent next-to-leading order global analyses.
AB - We report the first measurement of the inclusive jet and the dijet longitudinal double-spin asymmetries, ALL, at midrapidity in polarized pp collisions at a center-of-mass energy s=510 GeV. The inclusive jet ALL measurement is sensitive to the gluon helicity distribution down to a gluon momentum fraction of x≈0.015, while the dijet measurements, separated into four jet-pair topologies, provide constraints on the x dependence of the gluon polarization. Both results are consistent with previous measurements made at s=200 GeV in the overlapping kinematic region, x>0.05, and show good agreement with predictions from recent next-to-leading order global analyses.
UR - https://www.scopus.com/pages/publications/85072981732
U2 - 10.1103/PhysRevD.100.052005
DO - 10.1103/PhysRevD.100.052005
M3 - Article
AN - SCOPUS:85072981732
SN - 2470-0010
VL - 100
JO - Physical Review D
JF - Physical Review D
IS - 5
M1 - 052005
ER -