Production of and in p-Pb collisions at TeV

Area of Science:

• High-energy nuclear physics
• Particle physics
• Quantum chromodynamics

Background:

• Understanding particle production in high-energy collisions is crucial for probing the properties of nuclear matter.
• Strange and double-strange hyperons offer unique insights into the dynamics of quark-gluon interactions.

Purpose of the Study:

• To measure the transverse momentum distributions of hyperon resonances ($$, $$) in proton-lead (p-Pb) collisions.
• To investigate the dependence of hyperon production on charged-particle multiplicity density ($$d$$/d$$).
• To compare hyperon production with previous findings and study strangeness content effects.

Main Methods:

• Utilized data from p-Pb collisions at $$ TeV.
• Analyzed transverse momentum distributions within a specific rapidity range.
• Examined event classes based on charged-particle multiplicity densities ($$d$$/d$$).

Main Results:

• Mean transverse momentum of hyperons presented as a function of $$d$$/d$$ and particle mass.
• Integrated yield ratios of excited to ground-state hyperons found to be constant with $$d$$/d$$.
• Yield ratios to pions increase with $$d$$/d$$, correlating with strangeness content.

Conclusions:

• The production of strange and double-strange hyperons shows distinct behavior concerning event multiplicity.
• The observed trends in hyperon-to-pion ratios provide constraints on models of particle production in heavy-ion collisions.