arXiv subjects
Publications and source records attributed to P. Ronchese.
Measurements of production cross-sections of inclusive $b$-hadrons pairs, bottom mesons and baryons, and quarkonia at LHC will be shown. Recent measurements of branching fractions of bottom baryons, bottom mesons with baryons in the final state, and a new result about a search for intermediate states in meson decay will also be shown.
The phase $Φ_s$ is the key parameter for the CP-violation of the $B^0_s$-$\bar{B^0_s}$ system. An angular and proper decay time analysis is applied to the $B^0_s \rightarrow J/ψΦ$ events. Using a data sample collected by the CMS and ATLAS experiments in LHC Run1, the $B^0_s$ signal candidates are reconstructed and are used to extract the phase $Φ_s$. We present the latest update on the results in this decay channel.
The latest results of CMS in the area of exotic quarkonium decays will be presented: observation of a peaking structure in $J/ψΦ$ mass spectrum in the decay $B^\pm \rightarrow J/ψΦK^\pm$, search for new bottomonium states in $Υ(1\mathrm{S})π^+π^-$ mass spectrum, measurement of prompt $J/ψ$ pair production.
The muon tomography technique, based on multiple Coulomb scattering of cosmic ray muons, has been proposed as a tool to detect the presence of high density objects inside closed volumes. In this paper a new and innovative method is presented to handle the density fluctuations (noise) of reconstructed images, a well known problem of this technique. The effectiveness of our method is evaluated using experimental data obtained with a muon tomography prototype located at the Legnaro National Laboratories (LNL) of the Istituto Nazionale di Fisica Nucleare (INFN). The results reported in this paper, obtained with real cosmic ray data, show that with appropriate image filtering and muon momentum classification, the muon tomography technique can detect high density materials, such as lead, albeit surrounded by light or medium density material, in short times. A comparison with algorithms published in literature is also presented.