<p>The transverse momentum spectra of <InlineEquation ID="IEq1"> <InlineMediaObject> <ImageObject Color="BlackWhite" FileRef="10773_2025_5959_Article_IEq1.gif" Format="GIF" Height="20" Rendition="HTML" Resolution="72" Type="Linedraw" Width="66" /> </InlineMediaObject> <EquationSource Format="TEX">$K^{}(892)^{0}$</EquationSource> <EquationSource Format="MATHML"><math> <mrow> <mmultiscripts> <mi>K</mi> <mrow /> <mrow> <mrow /> <mo>∗</mo> </mrow> </mmultiscripts> <msup> <mrow> <mo stretchy="false">(</mo> <mn>892</mn> <mo stretchy="false">)</mo> </mrow> <mn>0</mn> </msup> </mrow> </math></EquationSource> </InlineEquation> and <InlineEquation ID="IEq2"> <InlineMediaObject> <ImageObject Color="BlackWhite" FileRef="10773_2025_5959_Article_IEq2.gif" Format="GIF" Height="20" Rendition="HTML" Resolution="72" Type="Linedraw" Width="62" /> </InlineMediaObject> <EquationSource Format="TEX">$\phi (1020)^{0}$</EquationSource> <EquationSource Format="MATHML"><math> <mrow> <mi>ϕ</mi> <msup> <mrow> <mo stretchy="false">(</mo> <mn>1020</mn> <mo stretchy="false">)</mo> </mrow> <mn>0</mn> </msup> </mrow> </math></EquationSource> </InlineEquation> are analyzed as a function of <InlineEquation ID="IEq3"> <InlineMediaObject> <ImageObject Color="BlackWhite" FileRef="10773_2025_5959_Article_IEq3.gif" Format="GIF" Height="12" Rendition="HTML" Resolution="72" Type="Linedraw" Width="20" /> </InlineMediaObject> <EquationSource Format="TEX">$p_{T}$</EquationSource> <EquationSource Format="MATHML"><math> <msub> <mi>p</mi> <mi>T</mi> </msub> </math></EquationSource> </InlineEquation> in the range <InlineEquation ID="IEq4"> <InlineMediaObject> <ImageObject Color="BlackWhite" FileRef="10773_2025_5959_Article_IEq4.gif" Format="GIF" Height="19" Rendition="HTML" Resolution="72" Type="Linedraw" Width="135" /> </InlineMediaObject> <EquationSource Format="TEX">$ 0< p_{T} < 5 \;GeV/c$</EquationSource> <EquationSource Format="MATHML"><math> <mrow> <mn>0</mn> <mo><</mo> <msub> <mi>p</mi> <mi>T</mi> </msub> <mo><</mo> <mn>5</mn> <mspace width="0.277778em" /> <mi>G</mi> <mi>e</mi> <mi>V</mi> <mo stretchy="false">/</mo> <mi>c</mi> </mrow> </math></EquationSource> </InlineEquation> and <InlineEquation ID="IEq5"> <InlineMediaObject> <ImageObject Color="BlackWhite" FileRef="10773_2025_5959_Article_IEq5.gif" Format="GIF" Height="19" Rendition="HTML" Resolution="72" Type="Linedraw" Width="148" /> </InlineMediaObject> <EquationSource Format="TEX">$ 0< p_{T} < 3.5 \;GeV/c$</EquationSource> <EquationSource Format="MATHML"><math> <mrow> <mn>0</mn> <mo><</mo> <msub> <mi>p</mi> <mi>T</mi> </msub> <mo><</mo> <mn>3.5</mn> <mspace width="0.277778em" /> <mi>G</mi> <mi>e</mi> <mi>V</mi> <mo stretchy="false">/</mo> <mi>c</mi> </mrow> </math></EquationSource> </InlineEquation> in <InlineEquation ID="IEq6"> <InlineMediaObject> <ImageObject Color="BlackWhite" FileRef="10773_2025_5959_Article_IEq6.gif" Format="GIF" Height="15" Rendition="HTML" Resolution="72" Type="Linedraw" Width="69" /> </InlineMediaObject> <EquationSource Format="TEX">$Au-Au$</EquationSource> <EquationSource Format="MATHML"><math> <mrow> <mi>A</mi> <mi>u</mi> <mo>-</mo> <mi>A</mi> <mi>u</mi> </mrow> </math></EquationSource> </InlineEquation> and <InlineEquation ID="IEq7"> <InlineMediaObject> <ImageObject Color="BlackWhite" FileRef="10773_2025_5959_Article_IEq7.gif" Format="GIF" Height="15" Rendition="HTML" Resolution="72" Type="Linedraw" Width="70" /> </InlineMediaObject> <EquationSource Format="TEX">$Cu-Cu$</EquationSource> <EquationSource Format="MATHML"><math> <mrow> <mi>C</mi> <mi>u</mi> <mo>-</mo> <mi>C</mi> <mi>u</mi> </mrow> </math></EquationSource> </InlineEquation> collisions, in the mid-rapidity interval i.e. <InlineEquation ID="IEq8"> <InlineMediaObject> <ImageObject Color="BlackWhite" FileRef="10773_2025_5959_Article_IEq8.gif" Format="GIF" Height="19" Rendition="HTML" Resolution="72" Type="Linedraw" Width="64" /> </InlineMediaObject> <EquationSource Format="TEX">$|y| < 0.5$</EquationSource> <EquationSource Format="MATHML"><math> <mrow> <mo stretchy="false">|</mo> <mi>y</mi> <mo stretchy="false">|</mo> <mo><</mo> <mn>0.5</mn> </mrow> </math></EquationSource> </InlineEquation>. We have used PYTHIA8, EPOS-LHC, and EPOS-1.99 event generators for this study at <InlineEquation ID="IEq9"> <InlineMediaObject> <ImageObject Color="BlackWhite" FileRef="10773_2025_5959_Article_IEq9.gif" Format="GIF" Height="19" Rendition="HTML" Resolution="72" Type="Linedraw" Width="100" /> </InlineMediaObject> <EquationSource Format="TEX">$\sqrt{s_{NN}} = 62.4$</EquationSource> <EquationSource Format="MATHML"><math> <mrow> <msqrt> <msub> <mi>s</mi> <mrow> <mi mathvariant="italic">NN</mi> </mrow> </msub> </msqrt> <mo>=</mo> <mn>62.4</mn> </mrow> </math></EquationSource> </InlineEquation> and <InlineEquation ID="IEq10"> <InlineMediaObject> <ImageObject Color="BlackWhite" FileRef="10773_2025_5959_Article_IEq10.gif" Format="GIF" Height="14" Rendition="HTML" Resolution="72" Type="Linedraw" Width="64" /> </InlineMediaObject> <EquationSource Format="TEX">$200\;GeV$</EquationSource> <EquationSource Format="MATHML"><math> <mrow> <mn>200</mn> <mspace width="0.277778em" /> <mi>G</mi> <mi>e</mi> <mi>V</mi> </mrow> </math></EquationSource> </InlineEquation>. In order to validate the models, Simulated distributions are compared with STAR Experimental data. The predictions obtained from PYTHIA8 shows good agreement with the STAR data, while the EPOS-LHC and EPOS-1.99 could not describe the STAR data very well. For the quantitative analysis the ratio: <InlineEquation ID="IEq11"> <InlineMediaObject> <ImageObject Color="BlackWhite" FileRef="10773_2025_5959_Article_IEq11.gif" Format="GIF" Height="20" Rendition="HTML" Resolution="72" Type="Linedraw" Width="132" /> </InlineMediaObject> <EquationSource Format="TEX">$K^{}(892)^{0}/K(498)^{0}$</EquationSource> <EquationSource Format="MATHML"><math> <mrow> <mmultiscripts> <mi>K</mi> <mrow /> <mrow> <mrow /> <mo>∗</mo> </mrow> </mmultiscripts> <msup> <mrow> <mo stretchy="false">(</mo> <mn>892</mn> <mo stretchy="false">)</mo> </mrow> <mn>0</mn> </msup> <mo stretchy="false">/</mo> <mi>K</mi> <msup> <mrow> <mo stretchy="false">(</mo> <mn>498</mn> <mo stretchy="false">)</mo> </mrow> <mn>0</mn> </msup> </mrow> </math></EquationSource> </InlineEquation> and <InlineEquation ID="IEq12"> <InlineMediaObject> <ImageObject Color="BlackWhite" FileRef="10773_2025_5959_Article_IEq12.gif" Format="GIF" Height="20" Rendition="HTML" Resolution="72" Type="Linedraw" Width="129" /> </InlineMediaObject> <EquationSource Format="TEX">$\phi (1020)^{0}/K(498)^{0}$</EquationSource> <EquationSource Format="MATHML"><math> <mrow> <mi>ϕ</mi> <msup> <mrow> <mo stretchy="false">(</mo> <mn>1020</mn> <mo stretchy="false">)</mo> </mrow> <mn>0</mn> </msup> <mo stretchy="false">/</mo> <mi>K</mi> <msup> <mrow> <mo stretchy="false">(</mo> <mn>498</mn> <mo stretchy="false">)</mo> </mrow> <mn>0</mn> </msup> </mrow> </math></EquationSource> </InlineEquation> is also presented. In this analysis TSallis fitting is used to extract freeze-out parameters.</p>

Strange Meson Production in Au-Au and Cu-Cu Collisions at RHIC Energies

期刊论文
发表日期：

2025年3月27日

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Alamgir Khan,
Yasir Ali,
Uzma Tabassam,
Taimoor Khurshid,
Ali Zaman

摘要

The transverse momentum spectra of $K^{*}(892)^{0}$ $K^{*} {(892)}^{0}$ and $\phi (1020)^{0}$ $ϕ {(1020)}^{0}$ are analyzed as a function of $p_{T}$ $p_{T}$ in the range $ 0< p_{T} < 5 \;GeV/c$ $0 < p_{T} < 5 G e V / c$ and $ 0< p_{T} < 3.5 \;GeV/c$ $0 < p_{T} < 3.5 G e V / c$ in $Au-Au$ $A u - A u$ and $Cu-Cu$ $C u - C u$ collisions, in the mid-rapidity interval i.e. $|y| < 0.5$ $| y | < 0.5$ . We have used PYTHIA8, EPOS-LHC, and EPOS-1.99 event generators for this study at $\sqrt{s_{NN}} = 62.4$ $\sqrt{s_{NN}} = 62.4$ and $200\;GeV$ $200 G e V$ . In order to validate the models, Simulated distributions are compared with STAR Experimental data. The predictions obtained from PYTHIA8 shows good agreement with the STAR data, while the EPOS-LHC and EPOS-1.99 could not describe the STAR data very well. For the quantitative analysis the ratio: $K^{*}(892)^{0}/K(498)^{0}$ $K^{*} {(892)}^{0} / K {(498)}^{0}$ and $\phi (1020)^{0}/K(498)^{0}$ $ϕ {(1020)}^{0} / K {(498)}^{0}$ is also presented. In this analysis TSallis fitting is used to extract freeze-out parameters.