Longitudinal double-spin asymmetry for inclusive jet and dijet production in pp collisions at root s=510 GeV

0508846 - ÚJF 2020 RIV US eng J - Článek v odborném periodiku
Adam, J. - Adamczyk, L. - Adams, J. R. - Adkins, J. K. - Agakishiev, G. - Bielčík, J. - Bielčíková, Jana - Chaloupka, P. - Federič, Pavol - Holub, L. - Kocan, M. - Kosarzewski, L. K. - Kramárik, L. - Líčeník, Robert - Matonoha, O. - Moravcová, Z. - Rusňák, Jan - Rusňáková, O. - Šimko, Miroslav - Šumbera, Michal - Vaněk, Jan … celkem 352 autorů
Longitudinal double-spin asymmetry for inclusive jet and dijet production in pp collisions at root s=510 GeV.
Physical Review D. Roč. 100, č. 5 (2019), č. článku 052005. ISSN 2470-0010. E-ISSN 2470-0029
Grant CEP: GA MŠMT LTT18002
Institucionální podpora: RVO:61389005
Klíčová slova: STAR collaboration * jet and dijet production * heavy ion collisions
Obor OECD: Nuclear physics
Impakt faktor: 4.833, rok: 2019
Způsob publikování: Open access
https://doi.org/10.1103/PhysRevD.100.052005

We report the first measurement of the inclusive jet and the dijet longitudinal double-spin asymmetries, A(LL) , at midrapidity in polarized pp collisions at a center-of-mass energy root s = 510 GeV. The inclusive jet A(LL) measurement is sensitive to the gluon helicity distribution down to a gluon momentum fraction of x approximate to 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 root 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.
Trvalý link: http://hdl.handle.net/11104/0299648