2021年10月
Anisotropic flow of identified hadrons in Xe-Xe collisions at $$ \sqrt{s_{\mathrm{NN } } } $$ = 5.44 TeV
Journal of High Energy Physics
- 巻
- 2021
- 号
- 10
- 開始ページ
- 152
- 終了ページ
- 記述言語
- 英語
- 掲載種別
- 研究論文(学術雑誌)
- DOI
- 10.1007/jhep10(2021)152
- 出版者・発行元
- Springer Science and Business Media LLC
<title>A<sc>bstract</sc>
</title>Measurements of elliptic (<italic>v</italic>2) and triangular (<italic>v</italic>3) flow coefficients of <italic>π</italic>±, K±, p+<inline-formula><alternatives><tex-math>$$ \overline{\mathrm{p } } $$</tex-math><mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML">
<mml:mover>
<mml:mi>p</mml:mi>
<mml:mo>¯</mml:mo>
</mml:mover>
</mml:math></alternatives></inline-formula>, <inline-formula><alternatives><tex-math>$$ {\mathrm{K } }_{\mathrm{S } }^0 $$</tex-math><mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML">
<mml:msubsup>
<mml:mi>K</mml:mi>
<mml:mi>S</mml:mi>
<mml:mn>0</mml:mn>
</mml:msubsup>
</mml:math></alternatives></inline-formula>, and Λ+<inline-formula><alternatives><tex-math>$$ \overline{\Lambda} $$</tex-math><mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML">
<mml:mover>
<mml:mi>Λ</mml:mi>
<mml:mo>¯</mml:mo>
</mml:mover>
</mml:math></alternatives></inline-formula> obtained with the scalar product method in Xe-Xe collisions at <inline-formula><alternatives><tex-math>$$ \sqrt{s_{\mathrm{NN } } } $$</tex-math><mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML">
<mml:msqrt>
<mml:msub>
<mml:mi>s</mml:mi>
<mml:mi>NN</mml:mi>
</mml:msub>
</mml:msqrt>
</mml:math></alternatives></inline-formula> = 5<italic>.</italic>44 TeV are presented. The results are obtained in the rapidity range |<italic>y</italic>| <italic><</italic> 0<italic>.</italic>5 and reported as a function of transverse momentum, <italic>p</italic>T, for several collision centrality classes. The flow coefficients exhibit a particle mass dependence for <italic>p</italic>T<italic><</italic> 3 GeV/<italic>c</italic>, while a grouping according to particle type (i.e., meson and baryon) is found at intermediate transverse momenta (3 <italic>< p</italic>T<italic><</italic> 8 GeV/<italic>c</italic>). The magnitude of the baryon <italic>v</italic>2 is larger than that of mesons up to <italic>p</italic>T = 6 GeV/<italic>c</italic>. The centrality dependence of the shape evolution of the <italic>p</italic>T-differential <italic>v</italic>2 is studied for the various hadron species. The <italic>v</italic>2 coefficients of <italic>π</italic>±, K±, and p+<inline-formula><alternatives><tex-math>$$ \overline{\mathrm{p } } $$</tex-math><mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML">
<mml:mover>
<mml:mi>p</mml:mi>
<mml:mo>¯</mml:mo>
</mml:mover>
</mml:math></alternatives></inline-formula> are reproduced by MUSIC hydrodynamic calculations coupled to a hadronic cascade model (UrQMD) for <italic>p</italic>T<italic><</italic> 1 GeV/<italic>c</italic>. A comparison with <italic>v</italic>n measurements in the corresponding centrality intervals in Pb-Pb collisions at <inline-formula><alternatives><tex-math>$$ \sqrt{s_{\mathrm{NN } } } $$</tex-math><mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML">
<mml:msqrt>
<mml:msub>
<mml:mi>s</mml:mi>
<mml:mi>NN</mml:mi>
</mml:msub>
</mml:msqrt>
</mml:math></alternatives></inline-formula> = 5<italic>.</italic>02 TeV yields an enhanced <italic>v</italic>2 in central collisions and diminished value in semicentral collisions.
</title>Measurements of elliptic (<italic>v</italic>2) and triangular (<italic>v</italic>3) flow coefficients of <italic>π</italic>±, K±, p+<inline-formula><alternatives><tex-math>$$ \overline{\mathrm{p } } $$</tex-math><mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML">
<mml:mover>
<mml:mi>p</mml:mi>
<mml:mo>¯</mml:mo>
</mml:mover>
</mml:math></alternatives></inline-formula>, <inline-formula><alternatives><tex-math>$$ {\mathrm{K } }_{\mathrm{S } }^0 $$</tex-math><mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML">
<mml:msubsup>
<mml:mi>K</mml:mi>
<mml:mi>S</mml:mi>
<mml:mn>0</mml:mn>
</mml:msubsup>
</mml:math></alternatives></inline-formula>, and Λ+<inline-formula><alternatives><tex-math>$$ \overline{\Lambda} $$</tex-math><mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML">
<mml:mover>
<mml:mi>Λ</mml:mi>
<mml:mo>¯</mml:mo>
</mml:mover>
</mml:math></alternatives></inline-formula> obtained with the scalar product method in Xe-Xe collisions at <inline-formula><alternatives><tex-math>$$ \sqrt{s_{\mathrm{NN } } } $$</tex-math><mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML">
<mml:msqrt>
<mml:msub>
<mml:mi>s</mml:mi>
<mml:mi>NN</mml:mi>
</mml:msub>
</mml:msqrt>
</mml:math></alternatives></inline-formula> = 5<italic>.</italic>44 TeV are presented. The results are obtained in the rapidity range |<italic>y</italic>| <italic><</italic> 0<italic>.</italic>5 and reported as a function of transverse momentum, <italic>p</italic>T, for several collision centrality classes. The flow coefficients exhibit a particle mass dependence for <italic>p</italic>T<italic><</italic> 3 GeV/<italic>c</italic>, while a grouping according to particle type (i.e., meson and baryon) is found at intermediate transverse momenta (3 <italic>< p</italic>T<italic><</italic> 8 GeV/<italic>c</italic>). The magnitude of the baryon <italic>v</italic>2 is larger than that of mesons up to <italic>p</italic>T = 6 GeV/<italic>c</italic>. The centrality dependence of the shape evolution of the <italic>p</italic>T-differential <italic>v</italic>2 is studied for the various hadron species. The <italic>v</italic>2 coefficients of <italic>π</italic>±, K±, and p+<inline-formula><alternatives><tex-math>$$ \overline{\mathrm{p } } $$</tex-math><mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML">
<mml:mover>
<mml:mi>p</mml:mi>
<mml:mo>¯</mml:mo>
</mml:mover>
</mml:math></alternatives></inline-formula> are reproduced by MUSIC hydrodynamic calculations coupled to a hadronic cascade model (UrQMD) for <italic>p</italic>T<italic><</italic> 1 GeV/<italic>c</italic>. A comparison with <italic>v</italic>n measurements in the corresponding centrality intervals in Pb-Pb collisions at <inline-formula><alternatives><tex-math>$$ \sqrt{s_{\mathrm{NN } } } $$</tex-math><mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML">
<mml:msqrt>
<mml:msub>
<mml:mi>s</mml:mi>
<mml:mi>NN</mml:mi>
</mml:msub>
</mml:msqrt>
</mml:math></alternatives></inline-formula> = 5<italic>.</italic>02 TeV yields an enhanced <italic>v</italic>2 in central collisions and diminished value in semicentral collisions.
- リンク情報
- ID情報
-
- DOI : 10.1007/jhep10(2021)152
- eISSN : 1029-8479