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Signatures of an \(\alpha \) + core structure in \(^{44}\)Ti + \(^{44}\)Ti collisions at \(\sqrt{s_{NN}}=5.02\) TeV by a multiphase transport model

  • Regular Article –Theoretical Physics
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Abstract

It is important to understand whether \(\alpha \)-clustering structures can leave traces in ultra-relativistic heavy ion collisions. Using the modified AMPT model, we simulate three \(\alpha \) + core configurations of \(^{44}\)Ti in \(^{44}\)Ti\( +^{44}\)Ti collisions at \(\sqrt{s_{NN}}=5.02\) TeV as well as other systems with Woods-Saxon structures. One of these configurations has no additional constraint, but the other two have the Mott density edge \(r_{\textrm{Mott}}\) set as either a lower or upper bound on the cluster position \(r_{\alpha }\) to check the influence of \(\alpha \) dissolution. This is the first time that the initial stage of the geometric properties in heavy-ion collisions has been configured using the traditional treatment of the nuclear structure. We compare the radial nucleon density, multiplicity distribution, transverse momentum spectra, eccentricity, triangularity, elliptic flow and triangular flow of these six systems. \(\alpha +\) core structures can alter all these observations especially in the most-central collisions, among which elliptic flow is the most hopeful as a probe of such structures.

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Data Availability Statement

This manuscript has no associated data or the data will not be deposited. [Authors’ comment: xxx.].

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Acknowledgements

This work was supported in part by National Key R &D Program of China under Grant No. 2018YFE0104600 and 2016YFE0100900, the National Natural Science Foundation of China under contract Nos. 12275054, 11890710, 11890714, 11925502, 12147101, 12061141008 and 11875066, the Strategic Priority Research Program of CAS under Grant No. XDB34000000, the Guangdong Major Project of Basic and Applied Basic Research No. 2020B0301030008, Shanghai Special Project for Basic Research No. 22TQ006 and the STCSM under Grant No. 23590780100.

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  1. Key Laboratory of Nuclear Physics and Ion-beam Application (MOE), Institute of Modern Physics, Fudan University, Shanghai, 200433, China

    Yu-Xuan Zhang, Song Zhang & Yu-Gang Ma

  2. Shanghai Research Center for Theoretical Nuclear Physics, NSFC and Fudan University, Shanghai, 200438, China

    Song Zhang & Yu-Gang Ma

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  1. Yu-Xuan Zhang
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  2. Song Zhang
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Correspondence to Yu-Gang Ma.

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Communicated by David Blaschke.

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Zhang, YX., Zhang, S. & Ma, YG. Signatures of an \(\alpha \) + core structure in \(^{44}\)Ti + \(^{44}\)Ti collisions at \(\sqrt{s_{NN}}=5.02\) TeV by a multiphase transport model. Eur. Phys. J. A 60, 73 (2024). https://doi.org/10.1140/epja/s10050-024-01290-x

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