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arXiv · 2409.11936

Measurement of f$_{1}$(1285) production in pp collisions at $\mathbf{\sqrt{{\textit s}}}$ = 13 TeV

ALICE Collaboration
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Abstract

This study presents the first measurement of the f$_{1}$(1285) resonance using the ALICE detector in inelastic proton-proton collisions at a center-of-mass energy of 13 TeV. The resonance is reconstructed at midrapidity ($|y| <$ 0.5) through the hadronic decay channel f$_{1} (1285) \rightarrow \mathrm{K^{0}_{S} K^{\pm}\pi^{\mp}}$. Key measurements include the determination of its mass, transverse-momentum integrated yield, and average transverse momentum. Additionally, the ratio of the transverse-momentum integrated yield of f$_{1}$(1285) to pion is compared with calculations from the canonical statistical hadronization model. The model calculation, assuming a zero total strangeness content for f$_{1}$(1285), reproduces the data within 1$\sigma$ deviation, shedding light on the quark composition of f$_{1}$(1285).

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ALICE Collaboration. 2024-09-18. Measurement of f$_{1}$(1285) production in pp collisions at $\mathbf{\sqrt{{\textit s}}}$ = 13 TeV. https://doi.org/10.1016/j.physletb.2025.139562

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