Showing papers by "Ludovico Pontecorvo published in 1991"
TL;DR: In this paper, the authors report measurements of b-quark and B-hadron production in pp collisions at √s=630 GeV and use muon samples to extract beauty production cross-sections over a wide range of transverse momentum in the central rapidity range |y| < 1.5.
99 citations
TL;DR: The first observation of the beauty baryon Λb in an exclusive decay channel at the CERN p p p collider was reported in this paper, with a significance of about five standard deviations.
61 citations
TL;DR: In this paper, the authors measured the production cross-section times branching ratio for J/ψ→μ+μ− in pp interactions at √s = 630 GeV in the kinematic range |y| and p T > 5 GeV /c.
51 citations
TL;DR: The UA1 search was carried out using μ+ μ− events with 3.9 B 0 d →μ + μ − K 0∗ of 2.3 × 10−5 as discussed by the authors.
40 citations
TL;DR: In this article, a new measurement of B 0 − B 0 mixing at the CERN SppS collider is reported, where the measured value of the mixing parameter, χ, is 0.145±0.20, which gives a limit of χs > 0.17 (0.12) at 90% CL.
22 citations
TL;DR: In this paper, an analysis of W and Z boson production at UA1, using 4.66 pb −1 of data from the 1988 and 1989 CERN p p Collider runs at s = 0.63 TeV, yields R ≡ σ W Br(W→ μ v)/ σ z Br(Z → μμ )=10.4 −1.8 stat.
18 citations
15 Mar 1991-Nuclear Instruments & Methods in Physics Research Section A-accelerators Spectrometers Detectors and Associated Equipment
TL;DR: A section of the UA1 uranium/tetramethylpentane forward calorimeter has been tested with muon and electron beams from the CERN Super Proton Synchrotron as mentioned in this paper.
Abstract: A section of the UA1 uranium/tetramethylpentane forward calorimeter has been tested with muon and electron beams from the CERN Super Proton Synchrotron. The module has a semi-octagonal shape, so that it will closely surround the beam pipe in the end-cap calorimeter region. The mechanical and electrical requirements of this design, needed to provide a full hermeticity for a large detector, have been successfully solved to achieve an excellent overall response of the calorimeter.
5 citations