Strange particle production in proton-proton collisions at $\sqrt{s}=0.9$ TeV with ALICE at the LHC

Abstract

The production of mesons containing strange quarks (K${}_s^0$, $\varphi$) and both singly and doubly strange baryons ($\Lambda$, Anti-$\Lambda$, and $\Xi$+Anti-$\Xi$) are measured at central rapidity in pp collisions at $\sqrt{s}$ = 0.9 TeV with the ALICE experiment at the LHC. The results are obtained from the analysis of about 250 k minimum bias events recorded in 2009. Measurements of yields (dN/dy) and transverse momentum spectra at central rapidities for inelastic pp collisions are presented. For mesons, we report yields (<dN/dy>) of 0.184 $\pm$ 0.002 stat. $\pm$ 0.006 syst. for K${}_s^0$ and 0.021 $\pm$ 0.004 stat. $\pm$ 0.003 syst. for $\varphi$. For baryons, we find <dN/dy> = 0.048 $\pm$ 0.001 stat. $\pm$ 0.004 syst. for $\Lambda$, 0.047 $\pm$ 0.002 stat. $\pm$ 0.005 syst. for Anti-$\Lambda$ and 0.0101 $\pm$ 0.0020 stat. $\pm$ 0.0009 syst. for $\Xi$+Anti-$\Xi$. The results are also compared with predictions for identified particle spectra from QCD-inspired models and provide a baseline for comparisons with both future pp measurements at higher energies and heavy-ion collisions.

33 pages, 21 captioned figures, 10 tables, authors from page 28, published version, figures at http://aliceinfo.cern.ch/ArtSubmission/node/3875

References in corpus (5)

• PYTHIA 6.4 Physics and Manual
• Systematic Measurements of Identified Particle Spectra in pp, d+Au and Au+Au Collisions from STAR
• Measurements of Strange Particle Production in $p+p$ Collisions at $\sqrt{s}$= 200 GeV
• Measurements of $\varphi$ meson production in relativistic heavy-ion collisions at RHIC
• Particle production in p-p collisions and prediction for LHC energy

Cited by in corpus (104)

• Enhanced production of multi-strange hadrons in high-multiplicity proton-proton collisions
• Centrality dependence of $\pi$, K, p production in Pb-Pb collisions at $\sqrt{s_{\mathrm{NN}}}$ = 2.76 TeV
• Multiplicity Dependence of Pion, Kaon, Proton and Lambda Production in p-Pb Collisions at $\sqrt{s_{\mathrm{NN}}}$ = 5.02 TeV
• K${}_{\mathrm{S}}^0$ and $\mathrm{\Lambda }$ production in Pb-Pb collisions at $\sqrt{s_{\mathrm{NN}}}$ = 2.76 TeV
• Production of pions, kaons and protons in pp collisions at $\sqrt{s}=900$ GeV with ALICE at the LHC
• Multi-strange baryon production at mid-rapidity in Pb-Pb collisions at $\sqrt{s_{\mathrm{NN}}}$ = 2.76 TeV
• K*(892)${}^0$ and $\Phi$(1020) production in Pb-Pb collisions at $\sqrt{s_{\mathrm{NN}}}$ = 2.76 TeV
• Color reconnection and flow-like patterns in pp collisions
• Strange Particle Production in pp Collisions at sqrt(s) = 0.9 and 7 TeV
• Production of $\Sigma (1385{)}^{\pm }$ and $\Xi (1530{)}^0$ in proton-proton collisions at $\sqrt{s}=$ 7 TeV
• Neutral pion and $\eta$ meson production in proton-proton collisions at $\sqrt{s}=0.9$ TeV and $\sqrt{s}=7$ TeV
• Tsallis Fits to pT Spectra and Multiple Hard Scattering in pp Collisions at the LHC
• Effects of Colour Reconnection on Hadron Flavour Observables
• Production of K${}^{\ast }$(892)${}^0$ and $\varphi$(1020) in pp collisions at $\sqrt{s}=7$ TeV
• Charged-particle multiplicities in proton-proton collisions at $\sqrt{s}$ = 0.9 to 8 TeV
• Multiplicity dependence of (multi-)strange hadron production in proton-proton collisions at $\sqrt{s}$ = 13 TeV
• Multi-strange baryon production in pp collisions at $\sqrt{s}$ = 7 TeV with ALICE
• Cosmic Ray Antiprotons at High Energies
• D${}_s^{+}$ meson production at central rapidity in proton-proton collisions at $\sqrt{s}$ = 7 TeV
• Production of light-flavor hadrons in pp collisions at $\sqrt{s}$ = 7 and $\sqrt{s}$ = 13 TeV
• ${\pi }^0$ and $\eta$ meson production in proton-proton collisions at $\sqrt{s}=8$ TeV
• PACIAE 2.0: An updated parton and hadron cascade model (program) for the relativistic nuclear collisions
• Cosmic-ray Antinuclei as Messengers of New Physics: Status and Outlook for the New Decade
• Underlying Event measurements in pp collisions at $\sqrt{s}$ = 0.9 and 7 TeV with the ALICE experiment at the LHC
• Mid-rapidity anti-baryon to baryon ratios in pp collisions at $\sqrt{s}$ = 0.9, 2.76 and 7 TeV measured by ALICE
• ${}_{\Lambda }^3\mathrm{H}$ and ${}_{\bar{\Lambda }}^3\bar{\mathrm{H}}$ lifetime measurement in Pb-Pb collisions at $\sqrt{s_{\mathrm{NN}}}=$ 5.02 TeV via two-body decay
• Light vector meson production in pp collisions at $\sqrt{s}$ = 7 TeV
• Kinetic freeze-out temperature and flow velocity extracted from transverse momentum spectra of final-state light flavor particles produced in collisions at RHIC and LHC
• Insight into particle production mechanisms via angular correlations of identified particles in pp collisions at $\sqrt{s}=7$ TeV
• A Fixed-Target Programme at the LHC: Physics Case and Projected Performances for Heavy-Ion, Hadron, Spin and Astroparticle Studies
• Identified particles in pp and Pb-Pb collisions at LHC energies with the ALICE detector
• Kshort and Lambda production in pp interactions at sqrt(s) = 0.9 and 7 TeV measured with the ATLAS detector at the LHC
• Using the Tsallis distribution for hadron spectra in $pp$ collisions: Pions and quarkonia at $\sqrt{s}$ = 5--13000 GeV
• Reply to Comment on "Towards a large deviation theory for strongly correlated systems"
• Production of $\Sigma (1385{)}^{\pm }$ and $\Xi (1530{)}^0$ in p-Pb collisions at $\sqrt{s_{\mathrm{NN}}}=5.02$ TeV
• Disentangling random thermal motion of particles and collective expansion of source from transverse momentum spectra in high energy collisions
• Multiplicity dependence of two-particle azimuthal correlations in pp collisions at the LHC
• Measurement of charged-particle distributions sensitive to the underlying event in $\sqrt{s}=13$ TeV proton-proton collisions with the ATLAS detector at the LHC
• Production of pions, kaons, (anti-)protons and $\varphi$ mesons in Xe-Xe collisions at $\sqrt{s_{\mathrm{NN}}}=5.44$ TeV
• On the possibility of q-scaling in high energy production processes
• K${}_s^0$K${}_s^0$ correlations in pp collisions at $\sqrt{s}=7$ TeV from the LHC ALICE experiment
• First measurement of ${\Xi }_{\mathrm{c}}^0$ production in pp collisions at $\sqrt{\mathbf{s}}$ = 7 TeV
• First measurement of the $\Lambda$-$\Xi$ interaction in proton-proton collisions at the LHC
• Measurement of the inclusive phi cross-section in pp collisions at sqrt(s) = 7 TeV
• ${\mathrm{K}}^{\ast }(892{)}^0$ and $\varphi (1020)$ production at midrapidity in pp collisions at $\sqrt{s}$ = 8 TeV
• Measurement of $V^0$ production ratios in $pp$ collisions at $\sqrt{s}=0.9$ and 7\,TeV
• Subthreshold Xi- Production in Collisions of p(3.5 GeV)+Nb
• Thermalization of Hadrons via Hagedorn States
• Heavy Ion physics with the ALICE experiment at the CERN LHC
• q-Moments remove the degeneracy associated with the inversion of the q-Fourier transform
• Freezeout conditions in proton-proton collisions at the top RHIC and LHC energies
• Particle Identification in the ALICE Experiment
• Event Shape Engineering and Multiplicity dependent Study of Identified Particle Production in proton+proton Collisions at $\sqrt{s}$= 13 TeV using PYTHIA8
• Collective expansion in pp collisions using the Tsallis statistics
• Hadronization within the Non-Extensive Approach and the Evolution of the Parameters
• Mean pt scaling with m/nq at the LHC: Absence of (hydro) flow in small systems?
• Fast Dynamical Evolution of Hadron Resonance Gas via Hagedorn States
• Hyperon/meson ratios in rare high-multiplicity $pp$ collisions at energies available at the Large Hadron Collider, and potential signatures for mini-quark-gluon plasma formation
• Inter-occurrence times and universal laws in finance, earthquakes and genomes
• K0s and Λ production in Pb--Pb collisions with the ALICE experiment
• Measurement of K${}^{\ast }$(892)${}^{\pm }$ production in inelastic pp collisions at the LHC
• Estimation of the freeze-out parameters reachable in the AFTER@LHC project
• Measurement of antiproton production from antihyperon decays in pHe collisions at $\sqrt{s_{NN}}=110$ GeV
• Core-corona interplay in Pb-Pb collisions at $\sqrt{s_{NN}}$=2.76 TeV
• First Results from the ALICE experiment at the LHC
• Production of $\Lambda$ and ${\mathrm{K}}_{\mathrm{S}}^0$ in jets in p-Pb collisions at $\sqrt{s_{\mathrm{NN}}}=5.02$ TeV and pp collisions at $\sqrt{s}=7$ TeV
• Long memory constitutes a unified mesoscopic mechanism consistent with nonextensive statistical mechanics
• Strange quark suppression and strange hadron production in pp collisions at RHIC and LHC
• $e^{+}$ and $\bar{p}$ production in $pp$ collisions and the cosmic-ray $e^{+}/\bar{p}$ flux ratio
• Production and ratio of $\pi$, K, p and $\Lambda$ in Pb + Pb collisions at $\sqrt{s_{NN}}$ = 2.76 TeV
• K${}_{\mathrm{S}}^0$- and (anti-)$\Lambda$-hadron correlations in pp collisions at $\sqrt{s}=13$ TeV
• Min-Bias and the Underlying Event at the LHC
• Measurement of $K_S^0$ and ${\Lambda }^0$ production in $t\bar{t}$ dileptonic events in $pp$ collisions at $\sqrt{s}=$ 7 TeV with the ATLAS detector
• Analysis on hadron spectra in heavy-ion collisions with a new non-extensive approach
• Strange and Multi-Strange Particle Production in ALICE
• Imprints of energy limitation in transverse momentum distributions of jets
• A machine learning-based study of open-charm hadrons in proton-proton collisions at the Large Hadron Collider
• Production of strange particles in charged jets in Pb--Pb and p--Pb collisions measured with ALICE
• Near-side azimuthal and pseudorapidity correlations using neutral strange baryons and mesons in d+Au, Cu+Cu and Au+Au collisions at $\sqrt{s_{NN}}$ = 200 GeV
• Universal scaling of strange particle $p_{\mathrm{T}}$ spectra in pp collisions
• Open Questions in the Understanding of Strangeness Production in HIC -- Experiment Perspective
• Resonances as Probes of Heavy-Ion Collisions at ALICE
• Evolution of strange and multi-strange hadron production with relative transverse multiplicity activity in underlying event
• Equilibration of hadrons in HICs via Hagedorn States
• Inclusive, prompt and non-prompt $\mathrm{J}/\psi$ identification in proton-proton collisions at the Large Hadron Collider using machine learning
• Beam energy dependence of net-hyperon yield and its implication on baryon transport mechanism
• Observation of the $\Omega$(2012) baryon at the LHC
• Strange Baryon to Meson Ratio
• Resonance measurements in pp and Pb--Pb collisions with the ALICE detector
• Identified particle production in pp collisions at $\sqrt{s}=$ 7 and 13 TeV measured with ALICE
• Charged-hadron and identified-hadron ($K_{\mathrm{S}}^0$, $\Lambda$, ${\Xi }^{-}$) yield measurements in photo-nuclear Pb+Pb and $p$+Pb collisions at $\sqrt{s_{\mathrm{NN}}}=5.02$ TeV with ATLAS
• Recent ALICE results on hadronic resonance production
• Measurement of identified charged hadron spectra with the ALICE experiment at the LHC
• Measurement of $\varphi$-meson production at forward rapidity in $p$$+$$p$ collisions at $\sqrt{s}$=510 GeV and energy dependence of ${\sigma }_{\varphi }$ from $\sqrt{s}$=200 GeV to 7 TeV
• Multi-strange particle measurements in 7 TeV proton-proton and 2.76 TeV PbPb collisions with the ALICE experiment at the LHC
• Measurement of the $\Lambda$ hyperon lifetime
• Resonance results in 7 TeV pp collisions with the ALICE detector at the LHC
• Production of strange hadrons in jets and underlying events in pp and p-Pb collisions with ALICE
• Strangeness production in two-particle azimuthal correlations on the near and away side measured with ALICE in pp collisions at 7 TeV
• Heavy Flavor Results at RHIC - A Comparative Overview
• First measurement of ${\mathrm{D}}_{s1}(1^{+})(2536{)}^{+}$ and ${\mathrm{D}}_{s2}^{\ast }(2^{+})(2573{)}^{+}$ production in proton-proton collisions at $\sqrt{s}=13$ TeV at the LHC
• Remarkable Features of Decaying Hagedorn States
• Average Transverse Momenta of Hadrons at LHC Energy 7 TeV vs. Masses and Heavy Neutral Hadron States
• Colour Reconnection - Models and Tests