Guillaume Pietrzyk

TL;DR: In this article , the authors measured the ratio of antiprotons originating from antihyperon decays to prompt production for antiproton momenta between 12 and 12 and found that the anti-hyperon contribution to antipron production is significantly larger than predictions of commonly used hadronic production models.

TL;DR: In this article , the first observation of lepton universality in B0→KS0e+e− and B+→K*+e + e+e+ e− decays is reported, where ℓ is either an electron or a muon.

TL;DR: A search for CP and P violation in B0→pp¯K+π− decays using LHCb data at 7-13 TeV is performed, observing P-parity violation at 5.8σ significance, but no evidence for CP violation, based on 8.4 fb−1 integrated luminosity.

TL;DR: In this article, a search in the invariant mass spectrum of the B$c}+}$ π$^{+}π$π$^{−}$ system for the excited B$ c+}+$ states was performed for the LHCb experiment at the centre-of-mass energy of 2 fb$ −1 −1−1.