Guillaume Pietrzyk

TL;DR: In this paper, the branching fractions of the doubly Cabibbo-suppressed decays are measured using the normalisation channels as normalization channels and the measurements are performed using proton-proton collision data collected with the LHCb detector at a center-of-mass energy of 8 TeV.

TL;DR: In this article, the authors search for long-lived particles decaying to $e^\pm \mu^\mp u, with masses between 7 and $50$ GeV/c$^2$ and lifetimes between 2 and$50$ ps, by looking at displaced vertices containing electrons and muons of opposite charges.

TL;DR: The LHCb experiment finds evidence for modified b quark hadronization in high-multiplicity pp collisions at 13 TeV, with increased B_{s}^{0} to B^{0} cross section ratio at low transverse momentum, suggesting quark coalescence in high-density hadronic medium.

TL;DR: In this article, a measurement of the CP$ asymmetries in B^0 to D^{\mp}\pi^{\pm} decays is reported. But the decays are reconstructed in a dataset collected with the LHCb experiment in proton-proton collisions at centre-of-mass energies of 7 and 8 TeV and corresponding to an integrated luminosity of $3.0 \rm{ fb}^{-1}$.