ISSN:
1434-6052
Source:
Springer Online Journal Archives 1860-2000
Topics:
Physics
Notes:
Abstract Evidence is presented for a newK * $$\bar K$$ +c.c. resonance with a mass of (1,526±6) MeV, a width of (107±15) MeV and quantum numbersIJ PC=01++. We call itD′ meson. Initially it is observed as aK * $$\bar K$$ +c.c. enhancement in the reactionsK − p→(K s 0 K ±π∓)Λ at 4.2 GeV/c. The isospin assignmentI=0 comes from its further observation in the reactionsK − p→(K s 0 K ±π∓)Σ 0 andK − p→(K s 0 K ±π∓)Σ(1,385)0 but not inK − p→(K + K −π−)Σ+ orK − p→(K s 0 K ±π∓)Σ(1,385)+. A maximum likelihood analysis of the (K $$\bar K$$ π) decay Dalitz plots in the reactionsK − p→(K s 0 K ±π∓) determines theJ PC of theD′ meson to be 1++. A satisfactorySU(3) fit is obtained to a 1++ nonet composed of theI-1A 1, theI=1/2Q A with theD(1,285) and theD′(1,526) as theI=0 members having a mixing angle close to the magic one.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF01572261
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