Measurement of f${}_1$(1285) production in pp collisions at $\sqrt{\text{s}}$ = 13 TeV

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${}_1(1285)\to {\mathrm{K}}_{\mathrm{S}}^0{\mathrm{K}}^{\pm }{\pi }^{\mp }$. 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).

arXiv comment25 pages, 6 captioned figures, 2 tables, authors from page 19, figures at http://alice-publications.web.cern.ch/node/11305

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