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The study of the K±Kmiss0π∓π+π− channel (7016 events), from annihilations in a gaseous hydrogen target at NTP, with the OBELIX spectrometer at LEAR (CERN), is presented. A spin-parity analysis provides evidence for two axial vectors, one in the low mass region, the well established f1(1285), decaying to a0(980)π, the second, the 1++ component of the old puzzling , the f1(1420), decaying mainly to , seen for the first time in annihilation at rest. The analysis confirms the dominant production of the pseudoscalar η(1405), decaying mainly to , and the existence of a second pseudoscalar in the same mass region, the η(1460), decaying mainly to .

A search for axial vectors in anti-p.p -> K+-.Kmiss0.pi+-.pi+.pi- annihilations at rest in gaseous hydrogen at NTP / A., B., M., B., M., C., A., C., S., D.C., R., D., A., F., D., G., B., G., U., M., M., P., N., S.C., R., S., S., V., A., V., F., V., M., V., A., V., A., Z., M., C., et al.. - In: PHYSICS LETTERS. SECTION B. - ISSN 0370-2693. - 400:1-2(1997), pp. 226-238. [10.1016/S0370-2693(97)00300-6]

A search for axial vectors in anti-p.p -> K+-.Kmiss0.pi+-.pi+.pi- annihilations at rest in gaseous hydrogen at NTP

AGNELLO, MICHELANGELO;IAZZI, Felice;MINETTI, Bruno;
1997

Abstract

The study of the K±Kmiss0π∓π+π− channel (7016 events), from annihilations in a gaseous hydrogen target at NTP, with the OBELIX spectrometer at LEAR (CERN), is presented. A spin-parity analysis provides evidence for two axial vectors, one in the low mass region, the well established f1(1285), decaying to a0(980)π, the second, the 1++ component of the old puzzling , the f1(1420), decaying mainly to , seen for the first time in annihilation at rest. The analysis confirms the dominant production of the pseudoscalar η(1405), decaying mainly to , and the existence of a second pseudoscalar in the same mass region, the η(1460), decaying mainly to .
1997
PHYSICS LETTERS. SECTION B
1.1 Articolo in rivista
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11583/1845762
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