arXiv subjects

Jon Urheim

Publications and source records attributed to Jon Urheim.

2 recordsLinked to original sources

arXiv2003

Observation of the Dsj(2463) and Confirmation of the Dsj*(2317)

Using 13.5 inverse-femtobarns of e+e- annihilation data in the CLEO II detector at CESR, we have observed a new narrow state decaying to Ds*+ pio, denoted the DsJ(2463). A possible interpretation holds that this is a J^P = 1+^ partner to the DsJ*(2317) state recently discovered by the BaBar Collaboration which is consistent with J^P = 0^+. We have also confirmed the existence of the DsJ*(2317) in its decay to Ds+ pio. We have measured the masses of both states, accounting for the cross-feed background that the two states represent for each other, and have searched for other decay channels for both states. No narrow resonances are seen in neutral or doubly charged Ds pi modes.

hep-ph↗

arXiv1994

New Results from CLEO-II on Hadronic Decays of the Tau Lepton

Results on semi-hadronic decays of the $τ$ lepton are presented, from studies of $e^+e^-$ annihilation data obtained at the Cornell Electron Storage Ring with the CLEO-II detector. Branching fractions have been measured for decays to two, three and four hadrons, namely $τ^-\!\!\rightarrow\! ν_τh^-π^0$, $τ^-\!\!\rightarrow\! ν_τh^-h^+h^-$, and $τ^-\!\!\rightarrow\! ν_τh^-h^+h^-π^0$, where $h^\pm$ represents a charged pion or kaon. CLEO-II has also observed decays with charged and/or neutral kaons; preliminary results for branching ratios and structure arising from the decay dynamics are given. Connections are made with predictions derived from theoretical models, the Conserved Vector Current theorem, isospin constraints and sum rules.

hep-ex↗