Evidence for Two-Body Hadronic Decays of the Upsilon
| dc.creator | Dytman, S. A. | |
| dc.date | 2003-07-15 | |
| dc.date.accessioned | 2026-07-07T06:28:46Z | |
| dc.date.available | 2026-07-07T06:28:46Z | |
| dc.description | We describe a search for hadronic decays of the Y(1S), Y(2S), and Y(3S) resonances to the exclusive final states rho pi, K*(892) Kbar, rho a2(1320), omega f2(1270), phi f2'(1525), K*(892) K2*(1430)bar, b1(1235) pi, K1(1270) Kbar, and K1(1400) Kbar. Upper limits at 90% CL are set for all these decays from all three resonances below 33x10**-6; in particular, B(Y(1S)--> rho pi) < 4x10**-6 is the smallest such upper limit. For two modes, a branching fraction of zero can be ruled out with a statistical significance of more than 5sigma: B(Y(1S) --> phi f2'(1525)) = (7 +3-2(stat) +-1(syst)) x 10**-6 and B(Y(1S) --> K1(1400) Kbar) = (14 +4-3(stat) +-2(syst)) x 10**-6. Production of K1(1270) Kbar in Y(1S) decay is suppressed relative to that of K1(1400) Kbar. These results add another piece to the challenging ``rho-pi puzzle'' of the charmonium system, placing constraints on models of how quantum chromodynamics should be applied to heavy quarkonia. All results are preliminary. | |
| dc.description | 12 pages postscript, also available through http://w4.lns.cornell.edu/public/CONF/2003, submitted to XXI Intern'l Symp on Lepton and Photon Interact'ns at High Energies, August 2003, Fermilab | |
| dc.identifier | https://arxiv.org/abs/hep-ex/0307035 | |
| dc.identifier | http://arxiv.org/abs/hep-ex/0307035 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/97808 | |
| dc.subject | High Energy Physics - Experiment | |
| dc.title | Evidence for Two-Body Hadronic Decays of the Upsilon | |
| dc.type | text |