Speaker
Description
The measurement of neutral mesons in pp and p—Pb collisions allows for testing perturbative QCD calculations, and provides an important baseline for heavy-ion measurements. The combination of the different reconstruction methods in ALICE allows the measurements of neutral mesons in a very wide range of transverse momenta, and thus imposes restrictions on the parton distribution functions and fragmentation functions over a large kinematic region. The high multiplicity pp and p—Pb collisions show similar observations to those in the heavy-ion collisions. Measured identified particle spectra in pp collisions with high charged-particle multiplicities give further insight into the hadron chemistry in such events.
In this talk, detailed measurements of the neutral pion, eta, and omega mesons will be presented in several multiplicity classes in pp and p--Pb collisions at $\sqrt{s}$ = 13 TeV and $\sqrt{s_{\rm NN}}$ = 5.02 TeV. The different analysis techniques include using two different calorimeters and the reconstruction of conversion photons via their $e^+e^-$ pairs. In particular, the inclusion of the merged photon cluster analysis using the calorimeter allows the extension of the neutral pion measurement up to an unprecedented high-$p_{\mathrm{T}}$ of 200 GeV/$c$ in pp and p-Pb collisions for identified hadron spectra. The new Run 3 of the LHC will further improve the statistics and therefore the precision of these observables.
| What kind of work does this abstract pertain to? | Experimental |
|---|---|
| Which experiment is this abstract related to? | ALICE |
