[Hadroproduction of charmed and bottom mesons (Fermilab experiment E-653): Progress report, June 13, 1983--June 14, 1984]
(I)Results are given for photoproduction of the D{sup *} at 103 GeV. Clean signals are seen for the decay D{sup *{+-}} {yields} {pi}{sup {+-}}D{sup 0} with the D{sup 0} decaying into both K{sup {-+}}{pi}{sup {+-}} and K{sup {-+}}{pi}{sup {+-}}{pi}{sup 0}. Analysis of the Dalitz plot for the K{pi}{pi} mode gives branching fractions (BFs) for K{sup {minus}}{rho}{sup +}, K{sup *{minus}}{pi}{sup +}, and {anti K}{sup *0}{pi}{sup 0} final states. The BF for D{sup 0} {yields} K{sup {minus}}{rho}{sup +}, much lower than a previous result, is in approximate agreement with the value expected for an l=1/2 final state. (II)Inelastic and elastic J/{psi} photoproduction on H is investigated at 103 GeV. The inelastic cross section with E{sub {psi}}/E{sub {gamma}} {lt} 0.9 is significantly lower than the corresponding result for muoproduction on Fe targets, but consistent with second-order perturbative QCD calculation. The mean p{sub +} of inelastic events is larger than that of elastic events. (III)Analysis of data from the CLEO experiment has yielded evidence for B{bar B} production from the 4S upsilon state. A preliminary cross section is shown. (IV)The SSD prototyping and testing program is described. The detectors performed as expected. (V)Three 24 x 36 mm{sup 2} Centronic detectors 300 microns thick were tested in 650-MeV/c proton and 600-MeV/c pion beams. Charge sharing was found to occur. (VI)Tests of attenuation lengths and light output were made on three types of scintillator: NE102A, PS12, and PS10. PS10 appears the most suitable. (VII)Charge-sharing SSDs of (V) were subject to analysis: checking of pulse heights of single stripes, hit pairs, and hit quads vs theoretical values; resolution of three-point proton/pion tracks, and characterization of devices by charge sum/difference plots of hit pairs. (VIII) Board fabrication and tests of a hadron calorimeter intended to be 91 x 91 sq.in. are discussed. (IX)Testing of an amplifier with LRS hybrid preamp is related.
- Research Organization:
- Oklahoma Univ., Norman, OK (United States). Dept. of Physics and Astronomy
- Sponsoring Organization:
- USDOE, Washington, DC (United States)
- DOE Contract Number:
- AS05-80ER10629
- OSTI ID:
- 140383
- Report Number(s):
- DOE/ER/10629-T4; ON: DE94004874; TRN: 94:000865
- Resource Relation:
- Other Information: PBD: [1984]
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
44 INSTRUMENTATION
INCLUDING NUCLEAR AND PARTICLE DETECTORS
PHOTON-PROTON INTERACTIONS
PHOTOPRODUCTION
CHARMED MESONS
PLASTIC SCINTILLATION DETECTORS
PERFORMANCE TESTING
SHOWER COUNTERS
PROGRESS REPORT
GEV RANGE 10-100
GEV RANGE 100-1000
D NEUTRAL MESONS
PIONS PLUS
PIONS MINUS
PIONS NEUTRAL
KAONS MINUS
KAONS PLUS
VECTOR MESONS
CROSS SECTIONS