Data taken with the ALEPH detector at LEP1 have been used to search for gamma gamma production of the glueball candidates f(0)(1500) and f(j)(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 f(0)(1500) and the f(j)(1710) have been measured to be Gamma (gamma gamma --> f(0)(1500)) . BR(f(0)(1500) --> pi(+)pi(-)) < 0.31 keV and Gamma (gamma gamma --> f(j)(1710)) . BR (f(j)(1710) --> pi(+)pi(-)) < 0.55 keV at 95% confidence level. (C) 2000 Elsevier Science B.V. All rights reserved. RI ANTONELLI, ANTONELLA/C-6238-2011; Jones, Roger/H-5578-2011; Passalacqua, Luca/F-5127-2011; Murtas, Fabrizio/B-5729-2012; O'Shea, Val/G-1279-2010; Ferrante, Isidoro/F-1017-2012
Search for the glueball candidates f(0)(1500) and f(J)(1710) in gamma gamma collisions
TRICOMI, Alessia Rita;
2000-01-01
Abstract
Data taken with the ALEPH detector at LEP1 have been used to search for gamma gamma production of the glueball candidates f(0)(1500) and f(j)(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 f(0)(1500) and the f(j)(1710) have been measured to be Gamma (gamma gamma --> f(0)(1500)) . BR(f(0)(1500) --> pi(+)pi(-)) < 0.31 keV and Gamma (gamma gamma --> f(j)(1710)) . BR (f(j)(1710) --> pi(+)pi(-)) < 0.55 keV at 95% confidence level. (C) 2000 Elsevier Science B.V. All rights reserved. RI ANTONELLI, ANTONELLA/C-6238-2011; Jones, Roger/H-5578-2011; Passalacqua, Luca/F-5127-2011; Murtas, Fabrizio/B-5729-2012; O'Shea, Val/G-1279-2010; Ferrante, Isidoro/F-1017-2012I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.