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Volume 321 - Sixth Annual Conference on Large Hadron Collider Physics (LHCP2018) - Posters
First results on $K*(892)^{\pm}$ resonance production in pp collisions with ALICE at the LHC
K. Garg* On behalf of the ALICE collaboration
*corresponding author
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Pre-published on: 2018 September 25
Published on:
Abstract
The study of strange hadronic resonances in pp collisions contributes to the study of strangeness production in small systems. Measurements in pp collisions constitute a reference for the study in larger colliding systems and provide constraints for tuning QCD-inspired event generators. Since the lifetimes of short-lived resonances such as $\mathrm{K}^{*}$(892)$^{\mathrm{\pm}}$ ($\tau \sim 4$ fm/$c$) are comparable with the lifetime of the fireball produced in heavy-ion collisions, regeneration and rescattering effects can modify the measured yield, especially at low transverse momentum.
The first results for the $\mathrm{K}^{*}$(892)$^{\mathrm{\pm}}$ resonance obtained in inelastic pp collisions at $√{s}$ = 5.02, 8, and 13 TeV will be shown. The $\mathrm{K}^{*}$(892)$^{\mathrm{\pm}}$ has been measured at mid-rapidity via its hadronic decay channel $\mathrm{K}^{*\mathrm{\pm}}$ $\rightarrow$ $\mathrm{K}^{0}_{\mathrm S}$ +$\pi^{\pm}$, with the ALICE detector. In particular, the transverse momentum ($p_{\mathrm{T}}$) spectrum, integrated yields, and ratio to stable hadrons will be presented. The results from K$^{*}$(892)$^{\mathrm{\pm}}$ are compared to the $\mathrm {K}^{*}$(892)$^{\mathrm{0}}$. The K$^{*}$(892)$^{\mathrm{\pm}}$ results are compared with K$^{*}$(892)$^{\mathrm{\pm}}$ predictions from various theoretical models. Particularly interesting is a comparison of the $p_{\mathrm{T}}$ spectra obtained at different energies that shows hardening of the spectra with increasing energy of the collisions.
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