Speaker
Description
Transverse mass scaling has been observed for a wide range of particle
species in $pp$ collisions at various energies from the SPS to RHIC and
the LHC. The observed scaling is different for baryons and mesons, and
in this work, we present a comprehensive study of the $m_{T}$-scaling at
LHC energies also extended to the heavier mesons. The study reveals a
systematic pattern in the scaling properties of mesons, which is related
to the particle quark content. In particular, light species and
ground-state quarkonia obey the same scaling, whereas open flavor
particles deviate from it because their spectra are significantly
harder. The magnitude of deviation depends on the flavor of the heaviest
quark in the meson. Extending the transverse mass scaling assumption to
the excited bottomonia states leads to the conclusion that the existing
measurements of their cross-section correspond to approximately a factor
of two suppression in production of these mesons in $pp$ collisions with
respect to expectations from the scaling.
