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Measurement of branching fractions and CP asymmetries in Λb0Ξb0→pKS0h− decays

A study of Λb0 and Ξb0 baryon decays to the final states pKS0π− and pKS0K− is performed using pp collision data collected by the LHCb experiment, corresponding to an integrated luminosity of 9 fb−1. The decays Λb0→pKS0K− and Ξb0→pKS0K− are observed for the first time, with significances reaching eight standard deviations. The branching fractions and integrated CP asymmetries are measured for the Λb0→pKS0π−, Λb0→pKS0K−, and Ξb0→pKS0K− decays. For the decay Λb0→pKS0π−, the CP asymmetries are me...

Inclusive B-meson flavour-tagging algorithm at LHCb

A new algorithm is developed to identify the flavour of neutral B mesons at production in pp collisions by utilising all tracks from the hadronisation process. The algorithm is calibrated separately for B0 and Bs0 mesons using B0 → J/ψK+π− and Bs0→Ds−π+ decays from pp collision data collected by the LHCb experiment at a centre-of-mass energy of 13 TeV. This new algorithm improves the tagging power by 35% for B0 mesons and 20% for Bs0 mesons when compared to the combined performance of the exi...

Rapidity and multiplicity dependence of charged-particle flow in pPb collisions at sNN=8.16 TeV

The elliptic and triangular flow of charged particles are measured using two-particle angular correlations in pPb collisions in the pseudorapidity range 2.0 < |η| < 4.8. The data sample was collected by the LHCb experiment in 2016 at a centre-of-mass energy per nucleon pair of sNN=8.16 TeV, containing in total approximately 1.5 billion collision events. Non-flow contributions are obtained in low-multiplicity collisions and subtracted to extract the flow harmonics. The results are presen...

Observation of a New Charmed Baryon Decaying to Ξc+ π-π+

The Ξc+π-π+ spectrum is investigated using proton-proton collisions at a center-of-mass energy of 13 TeV, corresponding to an integrated luminosity of 5.4 fb-1, collected by the LHCb experiment during 2016-2018. Four states are observed with high significance, and their masses and widths are measured to be m[Ξc(2815)+]=2816.65±0.03±0.03±0.23 MeV, Γ[Ξc(2815)+]=2.07±0.08±0.12 MeV, m[Ξc(2923)+]=2922.8±0.3±0.5±0.2 MeV, Γ[Ξc(2923)+]=5.3±0.9±1.4 MeV, m[Ξc(2970)+]=2968.6±0.5±0.5±0.2 MeV, Γ[Ξc(2970)+...

Late-onset alzheimer’s disease, atherosclerosis, and cerebrovascular disease. A complex relationship too often neglected: a narrative review

Since the 1990s, a long series of preclinical, epidemiological, clinical, and anatomo-pathological studies have questioned the purely “degenerative” origin of Alzheimer’s disease (AD), providing growing evidence of a possible “vascular” involvement in the pathogenesis of this type of dementia.Currently, evidence accumulated from preclinical, epidemiological, anatomo-pathological, clinical, neuroimaging, and proteomic studies supports a significant role of cerebral atherosclerosis in the patho...

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  • 04 Atto di Convegno (Proceedings)19572
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Autore
  • CALABRESE, Roberto1409
  • LUPPI, Eleonora1356
  • GARZIA, Isabella812
  • FIORINI, Massimiliano787
  • PAPPALARDO, Luciano Libero779
  • GAMBARI, Roberto770
  • TOMASSETTI, Luca748
  • GUIDI, Vincenzo717
  • PERESANI, Marco663
  • BOREA, Pier Andrea651
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