Abstract (data abstract)

We present strange particle spectra and yields measured at mid-rapidity in $\sqrt{s}$=200 GeV proton-proton (p+p) collisions at RHIC. We find that the previously observed universal transverse mass (mT≡$\sqrt{pT2+m2}$) scaling of hadron production in p+p collisions seems to break down at higher \mt and that there is a difference in the shape of the \mt spectrum between baryons and mesons. We observe mid-rapidity anti-baryon to baryon ratios near unity for Λ and Ξ baryons and no dependence of the ratio on transverse momentum, indicating that our data do not yet reach the quark-jet dominated region. We show the dependence of the mean transverse momentum (\mpt) on measured charged particle multiplicity and on particle mass and infer that these trends are consistent with gluon-jet dominated particle production. The data are compared to previous measurements from CERN-SPS, ISR and FNAL experiments and to Leading Order (LO) and Next to Leading order (NLO) string fragmentation model predictions. We infer from these comparisons that the spectral shapes and particle yields from p+p collisions at RHIC energies have large contributions from gluon jets rather than quark jets.

Figure 8 left up

Data from Figure 8 left up

10.17182/hepdata.96848.v1/t1

Corrected mid-rapidity (|y| < 0.5) pT spectra for $K^{+}$, $K^{−}$, $K^{0}_{S}$, Λ, Ξ, and Ω. Λ spectra that have been...
Figure 8 left down

Data from Figure 8 left down

10.17182/hepdata.96848.v1/t2

Corrected mid-rapidity (|y| < 0.5) pT spectra for $K^{+}$, $K^{−}$, $K^{0}_{S}$, Λ, Ξ, and Ω. Λ spectra that have been...
Figure 8 right up

Data from Figure 8 rught up

10.17182/hepdata.96848.v1/t3

Corrected mid-rapidity (|y| < 0.5) pT spectra for $K^{+}$, $K^{−}$, $K^{0}_{S}$, Λ, Ξ, and Ω. Λ spectra that have been...
Figure 8 right down

Data from Figure 8 rught down

10.17182/hepdata.96848.v1/t4

Corrected mid-rapidity (|y| < 0.5) pT spectra for $K^{+}$, $K^{−}$, $K^{0}_{S}$, Λ, Ξ, and Ω. Λ spectra that have been...
Figure 10 a

Data from Figure 10 a

10.17182/hepdata.96848.v1/t5

Mid-rapidity (|y| < 0.5) ratios of $\overline{\Lambda}$ to $\Lambda$ and $\overline{\Xi}^{+}$ to $\Xi^{-}$ vs $p_{T}$. The dashed lines in 10(b)...
Figure 10 b

Data from Figure 10 b

10.17182/hepdata.96848.v1/t6

Mid-rapidity (|y| < 0.5) ratios of $\overline{\Lambda}$ to $\Lambda$ and $\overline{\Xi}^{+}$ to $\Xi^{-}$ vs $p_{T}$. The dashed lines in 10(b)...
Figure 10 c

Data from Figure 10 c

10.17182/hepdata.96848.v1/t7

Mid-rapidity (|y| < 0.5) ratios of $\overline{\Lambda}$ to $\Lambda$ and $\overline{\Xi}^{+}$ to $\Xi^{-}$ vs $p_{T}$. The dashed lines in 10(b)...
Figure 11

Data from Figure 11

10.17182/hepdata.96848.v1/t8

⟨$p_{T}$⟩ vs particle mass for different particles measured by STAR. Error bars include systematic errors. The ISR parameterization is given...
Figure 12

Data from Figure 12

10.17182/hepdata.96848.v1/t9

⟨$p_{T}$⟩ vs charged multiplicity for $K^{+}$, $K^{−}$, $K^{0}_{S}$, $\Lambda+\overline{\Lambda}$, and $\Xi+\overline{\Xi}$. The points for $\Xi+\overline{\Xi}$ have been determined using only...
Figure 13 a

Data from Figure 13 a

10.17182/hepdata.96848.v1/t10

Ratios of multiplicity binned spectra to minimum bias spectra ($R_{pp}$) for $K^{0}_{S}$ and Λ and the ratio of the Λ...
Figure 13 b

Data from Figure 13 b

10.17182/hepdata.96848.v1/t11

Ratios of multiplicity binned spectra to minimum bias spectra ($R_{pp}$) for $K^{0}_{S}$ and Λ and the ratio of the Λ...
Figure 13 c

Data from Figure 13 c

10.17182/hepdata.96848.v1/t12

Ratios of multiplicity binned spectra to minimum bias spectra ($R_{pp}$) for $K^{0}_{S}$ and Λ and the ratio of the Λ...
Figure 20 up

Data from Figure 20 up

10.17182/hepdata.96848.v1/t13

Parameters of ratio data to statistical model fit using THERMUS. Filled circles are ratios from $\sqrt{s}$=200 GeV collisions in STAR....
Figure 20 down

Data from Figure 20 down

10.17182/hepdata.96848.v1/t14

Parameters of ratio data to statistical model fit using THERMUS. Filled circles are ratios from $\sqrt{s}$=200 GeV collisions in STAR....

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Figure 10 b

Figure 10 c

Figure 11

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Figure 13 a

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Figure 13 c

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