Engineering topics
Bocci, V.
Publications and source records attributed to Bocci, V..
Search for the Lepton-Flavor-Violating Decays B s 0 → τ ± μ ∓ and B 0 → τ ± μ ∓
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Search for the doubly charmed baryon $\Xi_{cc}^+$
A search for the doubly charmed baryon $\Xi_{cc}^+$ is performed through its decay to the $Λ$ $^{+}_{c}$ K – π + final state, using proton-proton collision data collected with the LHCb detector at centre-of-mass energies of 7, 8 and 13 TeV. The data correspond to a total integrated luminosity of 9 fb –1 . No significant signal is observed in the mass range from 3.4 to 3.8 GeV/c 2 . Upper limits are set at 95% credibility level on the ratio of the $\Xi_{cc}^+$ production cross-section times the branching fraction to that of $Λ$ $^{+}_{c}$ and $\Xi_{cc}^{++}$ baryons. The limits are determined as functions of the $\Xi_{cc}^+$ mass for different lifetime hypotheses, in the rapidity range from 2.0 to 4.5 and the transverse momentum range from 4 to 15 GeV/c.
Measurement of the ion fraction and mobility of 218Po produced in 222Rn decays in liquid argon
We report measurements of the charged daughter fraction of 218Po as a result of the 222Rn alpha decay, and the mobility of 218Po+ ions, using radon-polonium coincidences from the 238U chain identified in 532 live-days of DarkSide-50 WIMP-search data. The fraction of 218Po that is charged is found to be 0.37 ± 0.03 and the mobility of 218Po+ is (8.6 ± 0.1) × 10-4 cm2/Vs.