LO VETERE , Maurizio

The crate service card (CSC), has been designed and built to complete the readout of the instrumented flux return (IFR) of the BABAR experiment at the Stanford Linear Accelerator Center (SLAC). The CSC, which is physically part of the on-detector electronics, implements the slow control interface between the front end cards (FECs) and the IFR...

We describe the internal Xe-jet targets which have made possible the formation of antihydrogen {ie1581-2} atoms at CERN LEAR.

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A study has been performed of the reaction p̅ p⃗4K± using in-flight antiprotons from 1.1 to 2.0 GeV/c incident momentum interacting with a hydrogen jet target. The reaction is dominated by the production of a pair of φ mesons. The p̅ p⃗φφ cross section rises sharply above threshold and then falls continuously as a function of increasing...

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E835 studied the properties of the charmonium states formed in pp̄ annihilations. Recent and preliminary results are presented, including new preliminary measurements of χ cJ masses and widths (improving the knowledge of fine splitting of P states), a preliminary measurement of ψ(2S) branching ratios, and of the two photon partial width of the χ c 0 .

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We have constructed and tested silicon pixel detector arrays of 96 × 378 (36 288) sensor elements with 75 μm × 500 μm area. The low-noise signal processing circuit associated with each element occupies an identical area on a bump-bonded readout chip. The pixel cell response for ionizing particles is binary with an adjustable threshold between...

The BaBar experiment at PEPII relies on the instrumentation of the flux return (IFR) for both muon identification and KL detection. The active detector is composed of resistive plate chambers (RPCs) operated in streamer mode. Since the start of operation the RPCs have suffered persistent efficiency deterioration and dark current increase...