The KLOE experiment has just collected 2.5 fb(-1) of e(+)e(-) collisions at center of mass energy around the phi mass. Radiative decays are used to produce large statistical samples of light scalar and pseudoscalar mesons. The analysis of the first 450 pb(-1) is almost completed. For the scalar sector we have investigated the properties of these particles by studying their invariant mass shapes or the event density in the Dalitz plot. With the same data set the eta mass and the ratio BR(phi -> eta'gamma)/BR(phi -> eta gamma) have been measured. From this last quantity we extract the most precise determination of the eta/eta' mixing angle, which is strictly related to the eta' gluon content.
Highlights on hadronic physics at KLOE
Martini M;
2006-01-01
Abstract
The KLOE experiment has just collected 2.5 fb(-1) of e(+)e(-) collisions at center of mass energy around the phi mass. Radiative decays are used to produce large statistical samples of light scalar and pseudoscalar mesons. The analysis of the first 450 pb(-1) is almost completed. For the scalar sector we have investigated the properties of these particles by studying their invariant mass shapes or the event density in the Dalitz plot. With the same data set the eta mass and the ratio BR(phi -> eta'gamma)/BR(phi -> eta gamma) have been measured. From this last quantity we extract the most precise determination of the eta/eta' mixing angle, which is strictly related to the eta' gluon content.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
