Speaker
Description
Thanks to the possibility to inject gas into the LHC beam pipe while high-energy proton or ion beams circulate, the LHCb experiment has the unique capability to function as the as-of-today highest-energy fixed-target experiment. The resulting beam-gas collisions cover an unexplored energy range that is above previous fixed-target experiments, but below RHIC or LHC collider energies. We will present recent results and new developments from the beam-gas fixed-target collisions at LHCb, with a focus on the first results from the novel light-nuclei identification techniques which widen the rich programme of measurements of QCD and astrophysics interest. Also, using the diverse fixed-target data samples collected by the LHCb experiment, it is possible to study the influence of nuclear geometry on final-state particle correlations by comparing targets with different shapes. This contribution presents recent results on collective flow measurements in heavy-ion fixed-target collisions, including PbNe and PbAr, showing a strong influence of the nuclear geometry, predicted by the latest theoretical calculations.
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