$K^{+}$ signal and the corresponding background fit for the region covering mid-rapidity and $m_{t}−m_{0}$ between 25 and 50 $MeV/c^{2}$.

$K^{+}$ signal and the corresponding background fit for the region covering mid-rapidity and $m_{t}−m_{0}$ between 25 and 50 $MeV/c^{2}$.

$K^{+}$ signal and the corresponding background fit for the region covering mid-rapidity and $m_{t}−m_{0}$ between 25 and 50 $MeV/c^{2}$.

$K^{-}$ signal and the corresponding background fit for the region covering mid-rapidity and $m_{t}−m_{0}$ between 50 and 75 $MeV/c^{2}$.

$K^{-}$ signal and the corresponding background fit for the region covering mid-rapidity and $m_{t}−m_{0}$ between 50 and 75 $MeV/c^{2}$.

$K^{-}$ signal and the corresponding background fit for the region covering mid-rapidity and $m_{t}−m_{0}$ between 50 and 75 $MeV/c^{2}$.

$K^{+}K^{-}$ invariant mass distribution for the mid-rapidity region and $m_{t}−m_{0}$ between 0 and 100 $MeV/c^{2}$ after subtraction of the background.

$K^{+}K^{-}$ invariant mass distribution for the mid-rapidity region and $m_{t}−m_{0}$ between 0 and 100 $MeV/c^{2}$ after subtraction of the background.

$K^{+}K^{-}$ invariant mass distribution for the mid-rapidity region and $m_{t}−m_{0}$ between 0 and 100 $MeV/c^{2}$ after subtraction of the background.

Rapidity distributions of $K^{-}$ and $\phi$ as well as extracted inverse slope parameters obtained from the Boltzmann fits to the the $m_{t}$ spectra.

Rapidity distributions of $K^{-}$ and $\phi$ as well as extracted inverse slope parameters obtained from the Boltzmann fits to the the $m_{t}$ spectra.

Rapidity distributions of $K^{-}$ and $\phi$ as well as extracted inverse slope parameters obtained from the Boltzmann fits to the the $m_{t}$ spectra.

$K^{-}$ transverse-mass spectrum around mid-rapidity

$K^{-}$ transverse-mass spectrum around mid-rapidity

$K^{-}$ transverse-mass spectrum around mid-rapidity

Multiplicity ratio $\phi/K^{-}$ as function of $\sqrt{s_{NN}}$ for central heavy-ion collisions.

Multiplicity ratio $\phi/K^{-}$ as function of $\sqrt{s_{NN}}$ for central heavy-ion collisions.

Multiplicity ratio $\phi/K^{-}$ as function of $\sqrt{s_{NN}}$ for central heavy-ion collisions.

Multiplicities and effective inverse slopes $T_{eff}$ at mid-rapidity for given centrality classes.

Multiplicities and effective inverse slopes $T_{eff}$ at mid-rapidity for given centrality classes.

Multiplicities and effective inverse slopes $T_{eff}$ at mid-rapidity for given centrality classes.

Multiplicity ratios for given centrality classes.

Multiplicity ratios for given centrality classes.

Multiplicity ratios for given centrality classes.

Reduced transverse mass ($m_{t}-m_{0}$) spectra of $K^{+}$ for the 0-40% most central events.

Reduced transverse mass ($m_{t}-m_{0}$) spectra of $K^{+}$ for the 0-40% most central events.

Reduced transverse mass ($m_{t}-m_{0}$) spectra of $K^{+}$ for the 0-40% most central events.

Reduced transverse mass ($m_{t}-m_{0}$) spectra of $K^{-}$ for the 0-40% most central events.

Reduced transverse mass ($m_{t}-m_{0}$) spectra of $K^{-}$ for the 0-40% most central events.

Reduced transverse mass ($m_{t}-m_{0}$) spectra of $K^{-}$ for the 0-40% most central events.

Reduced transverse mass ($m_{t}-m_{0}$) spectra of $\phi$ for the 0-40% most central events.

Reduced transverse mass ($m_{t}-m_{0}$) spectra of $\phi$ for the 0-40% most central events.

Reduced transverse mass ($m_{t}-m_{0}$) spectra of $\phi$ for the 0-40% most central events.

Rapidity distribution of $K^{+}$ for the 0-40% most central events.

Example of $\Lambda$ signal for 0-40% most central events, over mixed-event background for the bin $-0.05 < y_{cm} < 0.05$ and reduced transverse masses between $100-150 MeV/c^{2}$.

Reduced transverse mass ($m_{t}-m_{0}$) spectra of $K^{0}_{S}$ for the 0-40% most central events.

Reduced transverse mass ($m_{t}-m_{0}$) spectra of $K^{0}_{S}$ for the 0-40% most central events. NOTE: The spectra are not scaled by $1/N_{Events}$! To compare the data, divide by $N_{Events} = 2.1997626 x 10^{9}$

Reduced transverse mass ($m_{t}-m_{0}$) spectra of $\Lambda$ for the 0-40% most central events.

Reduced transverse mass ($m_{t}-m_{0}$) spectra of $\Lambda$ for the 0-40% most central events. NOTE: The spectra are not scaled by $1/N_{Events}$! To compare the data, divide by $N_{Events} = 2.1997626 x 10^{9}$

Rapidity distribution of $K^{0}_{S}$

Rapidity distribution of $K^{0}_{S}$

Rapidity distribution of $\Lambda$

Rapidity distribution of $\Lambda$

Compilation of mid-rapidity yields for central Au+Au collisions as a function of $\sqrt{s_{NN}}$ of $K^{0}_{S}$ and $\Lambda$.

Compilation of mid-rapidity yields for central Au+Au collisions as a function of $\sqrt{s_{NN}}$ of $K^{0}_{S}$ and $\Lambda$.

Multiplicities per mean number of participants $Mult/\langle A_{Part}\rangle$ as a function of $\langle A_{Part}\rangle$

Multiplicities per mean number of participants $Mult/\langle A_{Part}\rangle$ as a function of $\langle A_{Part}\rangle$

Multiplicities per mean number of participants $Mult/\langle A_{Part}\rangle$ as a function of $\langle A_{Part}\rangle$ for $K^{0}_{S}$

Multiplicities per mean number of participants $Mult/\langle A_{Part}\rangle$ as a function of $\langle A_{Part}\rangle$ for $K^{0}_{S}$

Multiplicities per mean number of participants $Mult/\langle A_{Part}\rangle$ as a function of $\langle A_{Part}\rangle$ for $\Lambda$

Multiplicities per mean number of participants $Mult/\langle A_{Part}\rangle$ as a function of $\langle A_{Part}\rangle$ for $\Lambda$

Comparison of the shape of the rapidity distribution of $K^{0}_{S}$ to various transport model versions.

Comparison of the shape of the rapidity distribution of $K^{0}_{S}$ to various transport model versions.

Comparison of the shape of the rapidity distribution of $\Lambda$ to various transport model versions.

Comparison of the shape of the rapidity distribution of $\Lambda$ to various transport model versions.

Comparison of the shape of the $p_{t}$-spectra for $\pm0.15$ rapidity units around mid-rapidity of $K^{0}_{S}$ to various transport model versions.

Comparison of the shape of the $p_{t}$-spectra for $\pm0.15$ rapidity units around mid-rapidity of $K^{0}_{S}$ to various transport model versions.

Comparison of the shape of the $p_{t}$-spectra for $\pm0.15$ rapidity units around mid-rapidity of $\Lambda$ to various transport model versions.

Comparison of the shape of the $p_{t}$-spectra for $\pm0.15$ rapidity units around mid-rapidity of $\Lambda$ to various transport model versions.

Differential yield of $K^{0}_{S}$ as function of rapdidity and reduced transverse mass for the four centrality classes.

Differential yield of $K^{0}_{S}$ as function of rapdidity and reduced transverse mass for the four centrality classes. NOTE: The spectra are not scaled by $1/N_{Events}$! To compare the data, divide by $N_{Events} = 5.64247975 x 10^{8} (0 - 10\%)$, $5.85743394 x 10^{8} (10 - 20\%)$, $5.76369451 x 10^{8} (20 - 30\%)$ or $4.73401752 x 10^{8} (30 - 40\%)$

Differential yield of $\Lambda$ as function of rapdidity and reduced transverse mass for the four centrality classes.

Differential yield of $\Lambda$ as function of rapdidity and reduced transverse mass for the four centrality classes. NOTE: The spectra are not scaled by $1/N_{Events}$! To compare the data, divide by $N_{Events} = 5.64247975 x 10^{8} (0 - 10\%)$, $5.85743394 x 10^{8} (10 - 20\%)$, $5.76369451 x 10^{8} (20 - 30\%)$ or $4.73401752 x 10^{8} (30 - 40\%)$

$K^{0}_{S}$ and $\Lambda$ multiplicities in full phase space and inverse slopes at mid-rapidity $T_{Eff}$ for a given centrality.

$K^{0}_{S}$ and $\Lambda$ multiplicities in full phase space and inverse slopes at mid-rapidity $T_{Eff}$ for a given centrality.

Value of the parameter $\alpha$ extracted for $K^{+}$, $K^{-}$, $K^{0}_{S}$, $\Lambda$ and $\Phi$, as displayed in Figure 5 - Global $Mult/\langle A_{Part}\rangle$ Fit

Value of the parameter $\alpha$ extracted for $K^{+}$, $K^{-}$, $K^{0}_{S}$, $\Lambda$ and $\Phi$, as displayed in Figure 5 - Global $Mult/\langle A_{Part}\rangle$ Fit

The acceptance-corrected excess dielectron mass spectra, normalized to the charged particle multiplicity at mid-rapidity dNch/dy, in Au+Au collisions at $\sqrt{s_{NN}}$ = 19.6 GeV. The dNch/dy values in Au+Au collisions at $\sqrt{s_{NN}}$ = 19.6 GeV are from Ref. [38]. The normalization uncertainty from the STAR measured dN/dy is about 10%, which is not shown in the table.

The acceptance-corrected excess dielectron mass spectra, normalized to the charged particle multiplicity at mid-rapidity dNch/dy, in Au+Au collisions at $\sqrt{s_{NN}}$ = 200 GeV. The dNch/dy values in Au+Au collisions at $\sqrt{s_{NN}}$ = 200 GeV are from Ref. [39]. The normalization uncertainty from the STAR measured dN/dy is about 10%, which is not shown in the table.

Integrated yields of the normalized dilepton excesses for 0.4 < $M^{ll}$ < 0.75 GeV/c$^2$ as a function of dNch/dy. From top to bottom: 0-80% Au+Au collisions at $\sqrt{s_{NN}}$ = 19.6 GeV, then 0-10%, 10-40%, 40-80% and 0-80% Au+Au collisions at $\sqrt{s_{NN}}$ = 200 GeV.

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