Production of $\Sigma(1385)^{\pm}$ and $\Xi(1530)^{0}$ in proton-proton collisions at $\sqrt{s}=$ 7 TeV

TL;DR

This study measures the production of specific strange baryon resonances in proton-proton collisions at 7 TeV, compares the results with QCD models, and searches for the pentaquark, finding no evidence.

Contribution

First measurement of $ ext{Σ}(1385)^{ ext{±}}$ and $ ext{Ξ}(1530)^0$ production at 7 TeV in pp collisions, with comparison to theoretical models and a pentaquark search.

Findings

QCD-inspired models underpredict the measured spectra.

No evidence for the $ ext{φ}(1860)$ pentaquark.

Transverse momentum spectra are provided for the resonances.

Abstract

The production of the strange and double-strange baryon resonances ($\Sigma(1385)^{\pm}$, $\Xi(1530)^{0}$) has been measured at mid-rapidity ($\left | y \right |<0.5$) in proton-proton collisions at $\sqrt{s}$ = 7 TeV with the ALICE detector at the LHC. Transverse momentum spectra for inelastic collisions are compared to QCD-inspired models, which in general underpredict the data. A search for the $\phi(1860)$ pentaquark, decaying in the $\Xi\pi$ channel, has been carried out but no evidence is seen.