Azimuthal Anisotropy of $η$ and $π^{0}$ Mesons in Heavy-Ion Collisions at 2 AGeV

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dc.creatorTaranenko, A.
dc.creatorKugler, A.
dc.creatorPleskac, R.
dc.creatorTlusty, P.
dc.creatorWagner, V.
dc.creatorLohner, H.
dc.creatorOstendorf, R. W.
dc.creatorSiemssen, R. H.
dc.creatorVogt, P. H.
dc.creatorWilschut, H. W.
dc.creatorAverbeck, R.
dc.creatorHlavac, S.
dc.creatorHolzmann, R.
dc.creatorSchubert, A.
dc.creatorSimon, R. S.
dc.creatorStratmann, R.
dc.creatorWissmann, F.
dc.creatorCharbonnier, Y.
dc.creatorMartinez, G.
dc.creatorSchutz, Y.
dc.creatorDiaz, J.
dc.creatorMarin, A.
dc.creatorDoppenschmidt, A.
dc.creatorAppenheimer, M.
dc.creatorHejny, V.
dc.creatorMetag, V.
dc.creatorNovotny, R.
dc.creatorStroher, H.
dc.creatorWeiss, J.
dc.creatorWolf, A. R.
dc.creatorWolf, M.
dc.creatorCollaboration, TAPS
dc.date1999-03-15
dc.date.accessioned2026-07-07T05:37:48Z
dc.date.available2026-07-07T05:37:48Z
dc.descriptionAzimuthal distributions of $η$ and $π^{0}$ mesons emitted at midrapidity in collisions of 1.9 AGeV $^{58}$Ni+$^{58}$Ni and 2 AGeV $^{40}$Ca+$^{nat}$Ca are studied as a function of the number of projectile-like spectator nucleons. The observed anisotropy corresponds to a negative elliptic flow signal for $η$ mesons, indicating a preferred emission perpendicular to the reaction plane. The effect is smallest in peripheral Ni+Ni collisions. In contrast, for $π^{0}$ mesons, elliptic flow is observed only in peripheral Ni+Ni collisions, changing from positive to negative sign with increasing pion transverse momentum.
dc.description4 pages, 2 figures, Submitted to Phys. Rev. Lett
dc.identifierhttps://arxiv.org/abs/nucl-ex/9903008
dc.identifierhttp://arxiv.org/abs/nucl-ex/9903008
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/81403
dc.subjectNuclear Experiment
dc.titleAzimuthal Anisotropy of $η$ and $π^{0}$ Mesons in Heavy-Ion Collisions at 2 AGeV
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