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Conference paperFrye GM, Jenkins TL, Koga R, et al., 1989,
Search for gamma-ray emission above 50 MeV from SN1987A on day 407
, GRO Science Workshop, Pages: 315-318 -
Conference paperZammit CC, Caplin AD, Stradling RA, et al., 1989,
The development of Si thermistor detector arrays for a UK dark matter experiment
, Superconducting and Low-Temperature Particle Detectors, Pages: 85-102 -
Journal articleAPSIMON RJ, ATKINSON M, BAAKE M, et al., 1989,
INCLUSIVE PHOTOPRODUCTION OF SINGLE CHARGED-PARTICLES AT HIGH PT
, ZEITSCHRIFT FUR PHYSIK C-PARTICLES AND FIELDS, Vol: 43, Pages: 63-74, ISSN: 0170-9739- Author Web Link
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- Citations: 27
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Journal articleAlbrecht H, Böckmann P, Gläser R, et al., 1988,
Observation of the orbitally excited Λ(1520) baryon in e<sup>+</sup>e<sup>-</sup> annihilation
, Physics Letters B, Vol: 215, Pages: 429-434, ISSN: 0370-2693We report the first observation of an orbitally excited baryon, the Λ(1520), in quark and gluon fragmentation. The production rate is found to be (1.15±0.21±0.16)×10-2 and (0.80±0.17-0.13+0.10)×10-2 Λ(1520) hyperons per event in direct Υ{hooked} decays and in the continuum, respectively. In contrast to the observed situation for ground state baryons, the production of the Λ(1520) in direct Υ{hooked} decays shows little or no enhancement with respect to continuum production. © 1988.
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Journal articleSUMNER TJ, ROCHESTER GK, HALL G, 1988,
SILICON DRIFT CHAMBERS FOR X-RAY ASTRONOMY
, NUCL INSTRUM METH A, Vol: 273, Pages: 701-705, ISSN: 0168-9002 -
Journal articleAlbrecht H, Böckmann P, Gläser R, et al., 1988,
B meson decays to Dπ and Dϱ
, Physics Letters B, Vol: 215, Pages: 424-428, ISSN: 0370-2693The decays B→Dπ- and B→Dρ{variant}- are observed in data taken by the ARGUS detector at DORIS II. The measured branching ratios of the decays B-→D0π- and B0→D+ρ{variant}- are (2.1±0.8±0.9)% and (2.2±1.2±0.9)% respectively, while those of the decays B-→D0π- and B0→D+π- are (0.19±0.10±0.06)% and (0.31±0.13±0.10)% respectively. © 1988.
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Journal articleBoris S, Golutvin A, Laptin L, et al., 1988,
Erratum: Neutrino mass from the beta spectrum in the decay of tritium (Physical Review Letters (1988) 61, 2 (245))
, Physical Review Letters, Vol: 61, ISSN: 0031-9007- Cite
- Citations: 1
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Journal articleALBAJAR C, ALBROW MG, ALLKOFER OC, et al., 1988,
PRODUCTION OF LOW TRANSVERSE ENERGY CLUSTERS IN PBARP COLLISIONS AT SQUARE-ROOT-S = 0.2-0.9 TEV AND THEIR INTERPRETATION IN TERMS OF QCD JETS
, NUCLEAR PHYSICS B, Vol: 309, Pages: 405-425, ISSN: 0550-3213- Author Web Link
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- Citations: 160
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Journal articleALBAJAR C, ALBROW MG, ALLKOFER OC, et al., 1988,
MEASUREMENT OF THE BOTTOM QUARK PRODUCTION CROSS-SECTION IN PROTON-ANTIPROTON COLLISIONS AT SQUARE-ROOT-S=0.63 TEV
, PHYSICS LETTERS B, Vol: 213, Pages: 405-412, ISSN: 0370-2693- Author Web Link
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- Citations: 74
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Journal articleAlbrecht H, Böckmann P, Gläser R, et al., 1988,
First observation of γ→K<sup>*+</sup>K<sup>*-</sup>
, Physics Letters B, Vol: 212, Pages: 528-532, ISSN: 0370-2693The final states KS0KS0π+π - and KS0K∓ π0π±, produced in two-photon reactions, have been studied using the ARGUS detector at the e+e- storage ring DORIS II at DESY. The reaction γγ→K*+K*- has been observed for the first time. Its cross section is about eight times larger than that for γγ→K*0K*0, but it has a similar Wγγ dependence. © 1988.
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Journal articleSOOD RK, THOMAS JA, WALDRON L, et al., 1988,
UPPER LIMITS TO THE HIGH-ENERGY GAMMA-RAY AND HARD X-RAY FLUX FROM SN-1987A ON DAY 55
, MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, Vol: 234, Pages: P73-P77, ISSN: 0035-8711- Author Web Link
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- Citations: 4
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Journal articleAlbrecht H, Böckmann P, Gläser R, et al., 1988,
Observation of the charmed Baryon Σ<inf>c</inf> in e<sup>+</sup>e<sup>-</sup> annihilations
, Physics Letters B, Vol: 211, Pages: 489-492, ISSN: 0370-2693Using the ARGUS detector at the DORIS II storage ring, we have observed the charmed baryons Σc++ and Σc0, through their decays to Λc+π±. We have measured the mean Σc-Λc+ mass difference as 167.6±0.3±1.6 MeV/c2. The isospin mass splitting between the Σc++ and the Σc0 was found to be 1.2±0.7±0.3 MeV/c2. The rate of Λc+ production from Σc decays was found to be (36±12±11)% of the total rate of Λc+ production. The Σc χp spectrum was observed to be similar to that of the Λc+, with a Peterson function parameter ε{lunate} of 0.29±0.06. © 1988.
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Journal articleAlbrecht H, Böckmann P, Gläser R, et al., 1988,
Search for the decay B → K<sup>*</sup>γ
, Physics Letters B, Vol: 210, Pages: 258-262, ISSN: 0370-2693Using the ARGUS detector at the e+e- storage ring DORIS II at DESY, a search for the decays B→K*γ has been made. The following upper limits were derived at 90% CL: BR(B→K*(892)γ)<2.4×10-4, BR(B→K1(1400)γ)<4. -4, BR(B→K2*(1430)γ)<8.3×10 -4 and BR(B→K3* (1780)γ)<3.0×10-3. © 1988.
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Journal articleAlbrecht H, Böckmann P, Gläser R, et al., 1988,
A search for ωφ and φφ production in the reactions γγ→K<sup>+</sup>K<sup>-</sup>π<sup>+</sup>π<sup>- </sup>π<sup>0</sup> and γγ→2K<sup>+</sup>2K<sup>-</sup>
, Physics Letters B, Vol: 210, Pages: 273-277, ISSN: 0370-2693The reaction γγ→K+K-π+π- π0 has been observed for the first time, using the ARGUS detector at the e+e- storage ring DORIS II at DESY. The cross section shows an enhancement for Wγγ close to 3 GeV/c2. Searches for γγ→ωφ and for γγ→φφ leading to this final state, as well as for γγ→φφ→2K+2K-, have been performed. The derived upper limits for ωφ and φφ production are compatible with qqqq model predictions. © 1988.
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Journal articleAlbrecht H, Böckmann P, Gläser R, et al., 1988,
Observation of inclusive B meson decays into Λ<inf>c</inf><sup>+</sup> Baryons
, Physics Letters B, Vol: 210, Pages: 263-266, ISSN: 0370-2693We report the first direct observation of B meson decays into Λc+ baryons using the decay channel Λc+ → pK-π+. The product of branching ratios Br(B→Λc+X)·Br(Λc +→pK-π+ = (0.30±0.12±0.06)% is derived from an observed signal of 208±89 events. Using previous measurements of inclusive baryon rates we find a branching ratio for Λc+ → pK-π+ of (4.1±2.4)%. The measured Λc+ momentum spectrum indicates that the multi-particle final states dominate the decay B→Λc+X. © 1988.
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Journal articleAlbrecht H, Böckmann P, Gläser R, et al., 1988,
Lifetimes of charmed mesons
, Physics Letters B, Vol: 210, Pages: 267-272, ISSN: 0370-2693Using the ARGUS detector at the e+e- storage ring DORIS II at DESY, we have measured the lifetimes of the D0, D+ and D+S mesons. We find τD0 = (4.8±0.4±0.3) × 10-13 s, τD+ = (10.5±0.8±0.7) × 10-13 s and τD +S = (5.6+1.3-1.2±0.8) × 10-13 s. © 1988.
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Journal articleALBAJAR C, ALBROW MG, ALLKOFER OC, et al., 1988,
DIRECT PHOTON PRODUCTION AT THE CERN PROTON ANTIPROTON COLLIDER
, PHYSICS LETTERS B, Vol: 209, Pages: 385-396, ISSN: 0370-2693- Author Web Link
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- Citations: 62
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Journal articleALBAJAR C, ALBROW MG, ALLKOFER OC, et al., 1988,
LOW MASS DIMUON PRODUCTION AT THE CERN PROTON ANTIPROTON COLLIDER
, PHYSICS LETTERS B, Vol: 209, Pages: 397-406, ISSN: 0370-2693- Author Web Link
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- Citations: 37
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Journal articleAlbrecht H, Böckmann P, Gläser R, et al., 1988,
Search for D<sup>0</sup> decays into lepton pairs
, Physics Letters B, Vol: 209, Pages: 380-384, ISSN: 0370-2693We have searched for the lepton flavour-violating decay D0→μ±e∓ and for the rate decays D0μ+μ-, e+e- detector at the e+e- storage ring DORIS II. No candidates were found, leading to the upper limits BR (D0→μ+μ-)<7×10 - BR (D0→e+-)<1.7 × 10-4, and BR (D0→μ±e-+)<1.0 × 10-4 at 90 % confidence level. © 1988.
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Journal articleALBAJAR C, ALBROW MG, ALLKOFER OC, et al., 1988,
2-JET MASS DISTRIBUTIONS AT THE CERN PROTON-ANTIPROTON COLLIDER
, PHYSICS LETTERS B, Vol: 209, Pages: 127-134, ISSN: 0370-2693- Author Web Link
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- Citations: 50
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Journal articleAlbrecht H, Böckmann P, Gläser R, et al., 1988,
Observation of charmless B meson decays
, Physics Letters B, Vol: 209, Pages: 119-126, ISSN: 0370-2693Using the ARGUS detector at the e+e- storage ring DORIS II, we have observed charmless decays of B mesons into the final states pp̄π± and pp̄π+π-. The significance of the signal corresponds to more than five standard deviations. The branching ratios are (5.2±1.4±1.9)×10-4 for the three-body and (6.0±2.0±2.2)×10-4 for the four-body final state. These decays cannot proceed via the dominant b→c transitions, and we show that they are not the result of penguin-type processes. Thus, the observed decays must represent b→u quark transitions. Consequently, the Kobayashi-Maskawa matrix element Vub is non-zero. © 1988.
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Journal articleAlbrecht H, Binder U, Böckmann P, et al., 1988,
Measurement of D<sup>*</sup><inf>s</inf>-D<inf>s</inf> mass difference
, Physics Letters B, Vol: 207, Pages: 349-354, ISSN: 0370-2693Using the ARGUS detector at DORIS, we observe the production of D*+s mesons in e+e- annihilation through their subsequent decays to a D+s and a photon. Photons which convert in the beam pipe or drift chamber inner wall are used to obtain a high precision measurement of the D*+s-D+s mass difference, while photons detected in the shower counters are used to determine the production cross section, and to provide an independent measurement of the D*+s-D+s mass difference. The observed D*+s- D+s mass difference is 142.5±0.8±1.5 MeV/c2, and σ(e+e-→D*+s X)·BR(D*+s→D+s γ)(·BR(D+s →φπ+) is 4.4±1.1±1.0 pb at 10.2 GeV. The width of the D*+s is less than 4.5 MeV/c2 at 90% confidence level. © 1988.
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Journal articleAlbrecht H, Böckmann P, Gläser R, et al., 1988,
Observation of the charmed baryon Λ<inf>c</inf> in e<sup>+</sup>e<sup>-</sup> annihilation at 10 GeV
, Physics Letters B, Vol: 207, Pages: 109-114, ISSN: 0370-2693Using the ARGUS detector at DORIS II, we have studied the production of the charmed baryon Λc in e+e- annihilation at centre-of-mass energies near 10 GeV. The Λc+ was seen in the three decay modes pK-π+, Λπ+π-π+ and K̄0p, with products of normalized cross section times branching ratio [R·Br] of (10.8±1.4±1.2)×10-3, 6.6±1.5±0.9)×10-3 and (6.7±1.4±0.8)×10-3 respectively. The measured mass for the Λc was (2283.1±1.7±2.0) MeV/c2. A limit on the decay rates to Λπ+ is reported. The fragmentation function of the Λc was measured. © 1988.
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ReportUbertini P, Bazzano A, la Padula C, et al., 1988,
Supernova 1987a in the Large Magellanic Cloud
, IAU Circular, Publisher: IAU, 4590 -
Journal articleLITKE A, ADOLPHSEN C, SCHWARZ AS, et al., 1988,
A SILICON STRIP VERTEX DETECTOR FOR THE MARK-II EXPERIMENT AT THE SLAC LINEAR COLLIDER
, NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT, Vol: 265, Pages: 93-98, ISSN: 0168-9002- Author Web Link
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- Citations: 6
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Journal articleALBROW MG, APSIMON R, AUBERT B, et al., 1988,
PERFORMANCE OF A URANIUM TETRAMETHYLPENTANE ELECTROMAGNETIC CALORIMETER
, NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT, Vol: 265, Pages: 303-318, ISSN: 0168-9002- Author Web Link
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- Citations: 53
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Journal articleAlbrecht H, Binder U, Böckmann P, et al., 1988,
An improved upper limit on the ν<inf>τ</inf>-mass from the decay π<sup>-</sup>→π<sup>-</sup>π<sup>-</sup>π<sup>-</sup> π<sup>+</sup>π<sup>+</sup>ν<inf>τ</inf>
, Physics Letters B, Vol: 202, Pages: 149-153, ISSN: 0370-2693Using the ARGUS detector at the e+e- storage ring DORIS II, we have observed the decay τ-→π-π-π- π+π+ντ in tau-pair events produced at center-or-mass energies between 9.4 and 10.6 GeV. From the 5π invariant mass distribution we derive an upper limit of m(ντ)<35 MeV/c2 at the 95% confidence level. The branching ratio for this decay channel is found to be (0.064±0.023±0.01)%. © 1988.
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Journal articleDAUNCEY P, BARNETT BA, DREWER D, et al., 1988,
RADIATION-DAMAGE STUDIES OF A CUSTOM-DESIGNED VLSI READOUT CHIP
, IEEE TRANSACTIONS ON NUCLEAR SCIENCE, Vol: 35, Pages: 166-170, ISSN: 0018-9499- Author Web Link
- Cite
- Citations: 1
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Conference paperSood RK, Thomas J, Waldron L, et al., 1988,
50-500 MeV gamma-ray emission in the early phase of SN1987A
, New York, Nuclear Spectroscopy of Astrophysical Sources, Publisher: AIPC, Pages: 80-86 -
Journal articleADOLPHSEN C, GRATTA G, LITKE A, et al., 1988,
STATUS OF THE SILICON STRIP VERTEX DETECTOR FOR THE MARK-II EXPERIMENT AT THE SLC
, IEEE TRANSACTIONS ON NUCLEAR SCIENCE, Vol: 35, Pages: 424-427, ISSN: 0018-9499- Author Web Link
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- Citations: 10
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