We present the first study of the vector (Wess-Zumino) current in tau(-)-->K-pi-K+nu(tau) decay using data collected with the CLEO III detector at the Cornell Electron Storage Ring. We determine the ...quantitative contributions to the decay width from the vector and axial vector currents. Within the framework of a model by Kühn and Mirkes, we identify the quantitative contributions to the total decay rate from the intermediate states omegapi, rho(')pi, and K*K.
The CLEO-III ring imaging Cherenkov detector Mountain, R.J.; Artuso, M.; Ayad, R. ...
Nuclear instruments & methods in physics research. Section A, Accelerators, spectrometers, detectors and associated equipment,
08/1999, Letnik:
433, Številka:
1
Journal Article
Recenzirano
Odprti dostop
The CLEO-III detector upgrade for charged particle identification is discussed. The RICH design uses solid LiF crystal radiators coupled with multi-wire chamber photon detectors, using TEA as the ...photosensor, and low-noise Viking readout electronics. Results from our beam test at Fermilab are presented.
We report the first observation of the exclusive decays B-->D((*))K(*-), using 9.66 x 10(6) BB pairs collected at the Upsilon(4S) with the CLEO detector. We measure the following branching fractions: ...B(B--->D(0)K(*-)) = (6.1+/-1.6+/-1.7)x10(-4), B(B(0)-->D(+)K(*-)) = (3.7+/-1.5+/-1.0)x10(-4), B(B(0)-->D(*+)K(*-)) = (3.8+/-1.3+/-0.8)x10(-4), and B(B--->D(*0)K(*-)) = (7.7+/-2.2+/-2.6)x10(-4). The B-->D(*)K(*-) branching ratios are the averages of those corresponding to the 00 and 11 helicity states. The errors shown are statistical and systematic, respectively.
Study of the decays B 0 → D ( ) + D ( ) Shapiro, A.; Paar, H. P.; Potter, E. M. ...
Physical review. D, Particles and fields,
08/2000, Letnik:
62, Številka:
3
Journal Article
Using 13.7 fb(-1) of data recorded by the CLEO detector at the Cornell Electron Storage Ring, we investigate the spectrum of charmed baryons which decay into Lambda+(c)pi(-)pi(+) and are more massive ...than the Lambda+(c)(2625) baryon. We find evidence for two new states: one is broad and has an invariant mass roughly 480 MeV above that of the Lambda+(c) baryon; the other is narrow with an invariant mass of 596+/-1+/-2 MeV above the Lambda+(c) mass.
Test beam results from the CLEO III LiF-TEA RICH Artuso, M.; Azfar, F.; Efimov, A. ...
Nuclear instruments & methods in physics research. Section A, Accelerators, spectrometers, detectors and associated equipment,
12/1998, Letnik:
419, Številka:
2-3
Journal Article
Recenzirano
Odprti dostop
The CLEO collaboration is preparing a major upgrade of its present detector including a RICH detector for particle identification. This subdetector system follows the ‘proximity focussing’ design and ...uses Lithium Fluoride (LiF) crystal radiators and MWPCs filled with a CH4/TEA gas mixture. Part of the radiator crystals will have the new ‘sawtooth’ geometry. We have tested the first two of the 30 detector modules together with the first radiator crystals in a muon halo beam at Fermilab. For the measurement of the Cherenkov angle we obtain a single photon measurement error of 13.5mrad for the conventional planar radiator. With 14 detected photons we find a resolution per track of 4.5mrad. In the first measurement ever of a ‘sawtooth’ radiator we achieve a resolution of 11.8mrad for single photons and 4.8mrad per track for 12.3 detected photons with a reduced geometric acceptance. These results fulfill CLEO III requirements.
An experimental K-shell photodetachment study of Li(-) giving rise to doubly photoionized Li(+) ions has been carried out at the Advanced Light Source, using a collinear photon-ion beam apparatus. ...The experiment reveals dramatic structure, differing substantially both qualitatively and quantitatively from the corresponding processes above the 1s ionization threshold in Li and Li(+), as predicted by our enhanced R-matrix calculation. The experimental/theoretical comparison shows good agreement over some of the photon energy range, and also reveals some puzzling discrepancies.
The DAQ system for CLEO III Wolf, A.; Gwon, C.; Honscheid, K. ...
Computer physics communications,
05/1998, Letnik:
110, Številka:
1-3
Journal Article, Conference Proceeding
Recenzirano
In 1998 the CLEO detector collecting data at the CESR storage ring will be upgraded. A new Data Acquisition system will be installed during the upgrade to record triggers up to 1000 Hz with a mean ...data size of 25 KBytes per event.
In this largely improved system, we will exploit the new CBLT VME transfer mode (defined by VIPA) to readout crates with about 15 9U digitization cards. Secondly, we decided to design and build a FASTBUS-VME interface card with the dimension of a FASTBUS card, and a 2-slot VME backplane inside. With this interface, all hardware and software will be homogeneous at this point of the DAQ data pipeline. It will also perform additional sparsification and channel tagging “on the fly”. This new system will be monitored and controlled by a networked system of CPUs. To achieve a dynamical and simple connection method between the various processes we chose the CORBA standard communication method. The port to PowerPC based VME boards was done in close collaboration with Visigenic Corp.
PDF
