Search for narrow resonances below the Υ mesons
Ημερομηνία
2005Συγγραφέας
Apollinari, G.Barone, M.
Carithers, W.
Dell'orso, M.
Dorigo, T.
Fiori, I.
Franklin, M.
Giannetti, P.
Giromini, P.
Happacher, F.
Miscetti, S.
Parri, A.
![ORCID logo](https://orcid.org/sites/default/files/images/orcid_16x16.png)
Velev, G.
ISSN
1550-7998Source
Physical Review D - Particles, Fields, Gravitation and CosmologyVolume
72Issue
9Google Scholar check
Metadata
Εμφάνιση πλήρους εγγραφήςΕπιτομή
We have investigated the invariant mass spectrum of dimuons collected by the CDF experiment during the 1992-1995 run of the Fermilab Tevatron collider to improve the limit on the existence of narrow resonances set by the experiments at the SPEAR e+e- collider. In the mass range 6.3-9.0GeV/c2, we derive 90% upper credible limits to the ratio of the production cross section times muonic branching fraction of possible narrow resonances to that of the Υ(1S) meson. In this mass range, the average limit varies from 1.7 to 0.5%. This limit is much worse at the mass of 7.2GeV/c2 due to an excess of 250±61 events with a width consistent with the detector resolution. © 2005 The American Physical Society.