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| Main Authors: | , , , |
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| Format: | Preprint |
| Published: |
2023
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| Subjects: | |
| Online Access: | https://arxiv.org/abs/2303.06577 |
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| _version_ | 1866909154462924800 |
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| author | Tang, Siyu Zheng, Liang Zhang, Xiaoming Wan, Renzhuo |
| author_facet | Tang, Siyu Zheng, Liang Zhang, Xiaoming Wan, Renzhuo |
| contents | The elliptic azimuthal anisotropy coefficient ($v_{2}$) of the identified particles at midrapidity ($|η|<0.8$) was investigated in p--Pb collisions at $\sqrt{s_\mathrm{NN}}=$ 5.02 TeV using a multi-phase transport model (AMPT). The calculations of differential $v_{2}$ based on the advanced flow extraction method of light flavor hadrons (pions, kaons, protons, and $Λ$) in small collision systems were extended to a wider transverse momentum ($p_{\mathrm{T}}$) range of up to 8 GeV/$c$ for the first time. The string-melting version of the AMPT model provides a good description of the measured $p_{\mathrm{T}}$-differential $v_{2}$ of the mesons but exhibits a slight deviation from the baryon $v_{2}$. In addition, we observed the features of mass ordering at low $p_{\mathrm{T}}$ and the approximate number of constituent quarks (NCQ) scaled at intermediate $p_{\mathrm{T}}$. Moreover, we demonstrate that hadronic rescattering does not have a significant impact on $v_{2}$ in p--Pb collisions for different centrality selections, whereas partonic scattering dominates in generating the elliptic anisotropy of the final particles. This study provides further insight into the origin of collective-like behavior in small collision systems and has referential value for future measurements of azimuthal anisotropy. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2303_06577 |
| institution | arXiv |
| publishDate | 2023 |
| record_format | arxiv |
| spellingShingle | Investigating the elliptic anisotropy of identified particles in p--Pb collisions with a multi-phase transport model Tang, Siyu Zheng, Liang Zhang, Xiaoming Wan, Renzhuo High Energy Physics - Phenomenology The elliptic azimuthal anisotropy coefficient ($v_{2}$) of the identified particles at midrapidity ($|η|<0.8$) was investigated in p--Pb collisions at $\sqrt{s_\mathrm{NN}}=$ 5.02 TeV using a multi-phase transport model (AMPT). The calculations of differential $v_{2}$ based on the advanced flow extraction method of light flavor hadrons (pions, kaons, protons, and $Λ$) in small collision systems were extended to a wider transverse momentum ($p_{\mathrm{T}}$) range of up to 8 GeV/$c$ for the first time. The string-melting version of the AMPT model provides a good description of the measured $p_{\mathrm{T}}$-differential $v_{2}$ of the mesons but exhibits a slight deviation from the baryon $v_{2}$. In addition, we observed the features of mass ordering at low $p_{\mathrm{T}}$ and the approximate number of constituent quarks (NCQ) scaled at intermediate $p_{\mathrm{T}}$. Moreover, we demonstrate that hadronic rescattering does not have a significant impact on $v_{2}$ in p--Pb collisions for different centrality selections, whereas partonic scattering dominates in generating the elliptic anisotropy of the final particles. This study provides further insight into the origin of collective-like behavior in small collision systems and has referential value for future measurements of azimuthal anisotropy. |
| title | Investigating the elliptic anisotropy of identified particles in p--Pb collisions with a multi-phase transport model |
| topic | High Energy Physics - Phenomenology |
| url | https://arxiv.org/abs/2303.06577 |