Search for the glueball candidates f0(1500) and fJ(1710) in gamma gamma collisions

TL;DR

This study used ALEPH detector data from LEP1 to search for gamma gamma production of glueball candidates f0(1500) and fJ(1710) via their decay to pi+pi-, setting upper limits on their production rates.

Contribution

First experimental upper limits on gamma gamma widths times branching ratios for f0(1500) and fJ(1710) in gamma gamma collisions.

Findings

No signal observed for the glueball candidates.

Upper limits set: <0.31 keV for f0(1500) and <0.55 keV for fJ(1710).

Results constrain models predicting glueball production in gamma gamma interactions.

Abstract

Data taken with the ALEPH detector at LEP1 have been used to search for gamma gamma production of the glueball candidates f0(1500) and fJ(1710) via their decay to pi+pi-. No signal is observed and upper limits to the product of gamma gamma width and pi+pi- branching ratio of the f0(1500) and the fJ(1710) have been measured to be Gamma_(gamma gamma -> f0(1500)). BR(f0(1500)->pi+pi-) < 0.31 keV and Gamma_(gamma gamma -> fJ(1710)). BR(fJ(1710)->pi+pi-) < 0.55 keV at 95% confidence level.