\begin{document}$\beta_T$\end{document}) dependence of the anti-deuteron to deuteron ratio as a new observable to search for the QCD critical point in heavy-ion collisions. The QCD critical point can attract the system evolution trajectory in the QCD phase diagram, which is known as the focusing effect. To quantify this effect, we employ the thermal and hadronic transport model to simulate the dynamical particle emission along a hypothetical focusing trajectory near the critical point. We found that the focusing effect can lead to anomalous \begin{document}$\beta_T$\end{document} dependence on \begin{document}$\bar{p}/p$\end{document}, \begin{document}$\bar{d}/d$\end{document} and \begin{document}$^3\overline{\rm{He}}/^3{\rm{He}}$\end{document} ratios. We examined the \begin{document}$\beta_T$\end{document} dependence of \begin{document}$\bar{p}/p$\end{document} and \begin{document}$\bar{d}/d$\end{document} ratios of central Au+Au collisions at \begin{document}$\sqrt {s_{\rm{NN}}} = $\end{document} 7.7 to 200 GeV measured by the STAR experiment at RHIC. Surprisingly, we only observe a negative slope in \begin{document}$\beta_T$\end{document} dependence of \begin{document}$\bar{d}/d$\end{document} ratio at \begin{document}$\sqrt {s_{\rm{NN}}} = $\end{document} 19.6 GeV, which indicates the trajectory evolution has passed through the critical region. In the future, we could constrain the location of the critical point and/or width of the critical region by conducting precise measurements on the \begin{document}$\beta_T$\end{document} dependence of the \begin{document}$\bar{d}/d$\end{document} ratio at different energies and rapidity."> Search for QCD critical point by transverse velocity dependence of anti-deuteron to deuteron ratio -
  • [1]

    Y. Aoki, G. Endrodi, Z. Fodor et al, Nature,443: 675 (2006)

  • [2]

    C. S. Fischer, Prog. Part. Nucl. Phys.,105: 1 (2019), arXiv:1810.12938[hep-ph

  • [3]

    S.-X. Qin, L. Chang, H. Chen et al, Phys. Rev. Lett.,106: 172301 (2011), arXiv:1011.2876[nucl-th

  • [4]

    C. Shi, Y.-L. Wang, Y. Jiang, Z.-F. Cui, and H.-S. Zong, JHEP,07: 014 (2014), arXiv:1403.3797[hep-ph

  • [5]

    Y. Lu, Y.-L. Du, Z.-F. Cui, and H.-S. Zong, Eur. Phys. J. C,75: 495 (2015), arXiv:1508.00651[hep-ph

  • [6]

    F. Gao and Y.-X. Liu, Phys. Rev. D,94: 076009 (2016), arXiv:1607.01675[hep-ph

  • [7]

    Z. Fodor, S. Katz, and K. Szabó, Physics Letters B,568: 73 (2003)

  • [8]

    Z. Fodor and S. D. Katz, Journal of High Energy Physics,2004: 050 (2004)

  • [9]

    R. V. Gavai and S. Gupta, Phys. Rev. D,71: 114014 (2005)

  • [10]

    F. Karsch et al, Nucl. Phys. A,956: 352 (2016)

  • [11]

    S. Gupta, X. Luo, B. Mohanty, H. G. Ritter, and N. Xu, Science,332: 1525 (2011), arXiv:1105.3934[hep-ph

  • [12]

    M. A. Stephanov, PoS,LAT2006: 024 (2006), arXiv:heplat/0701002[hep-lat

  • [13]

    M. M. Aggarwal et al (STAR Collaboration), Phys. Rev. Lett.,105: 022302 (2010)

  • [14]

    L. Adamczyk et al (STAR Collaboration), Phys. Rev. Lett.,112: 032302 (2014)

  • [15]

    L. Adamczyk et al (STAR Collaboration), Phys. Rev. Lett.,113: 092301 (2014)

  • [16]

    L. Adamczyk et al, Physics Letters B,785: 551 (2018)

  • [17]

    X. Luo (STAR Collaboration), PoS,CPOD2014: 019 (2015), arXiv:1503.02558[nucl-ex

  • [18]

    X. Luo, Nucl. Phys. A,956: 75 (2015), arXiv:1512.09215[nucl-ex

  • [19]

    X. Luo and N. Xu, Nucl. Sci. Tech.,28: 112 (2017), arXiv:1701.02105[nucl-ex

  • [20]

    D. Zhang (STAR), (2019), arXiv: 1909.07028[nucl-ex]

  • [21]

    H. Liu, D. Zhang, S. He et al, (2019), arXiv: 1909.09304[nucl-th]

  • [22]

    M. A. Stephanov, Phys. Rev. Lett.,107: 052301 (2011)

  • [23]

    K.-J. Sun, L.-W. Chen, C. M. Ko et al, Phys. Lett. B,774: 103 (2017), arXiv:1702.07620[nucl-th

  • [24]

    J. Chen, D. Keane, Y.-G. Ma et al, Physics Reports,760: 1 (2018)

  • [25]

    C. Nonaka and M. Asakawa, Phys. Rev. C,71: 044904 (2005)

  • [26]

    M. Asakawa, S. A. Bass, B. Müller et al, Phys. Rev. Lett.,101: 122302 (2008)

  • [27]

    X. F. Luo, M. Shao, C. Li et al, Physics Letters B,673: 268 (2009)

  • [28]

    L. Adamczyk et al (STAR Collaboration), Phys. Rev. C,96: 044904 (2017)

  • [29]

    N. Yu and X. Luo, The European Physical Journal A,55: 26 (2019)

  • [30]

    Z. Fecková, J. Steinheimer, B. Tomášik et al, Phys. Rev. C,92: 064908 (2015)

  • [31]

    Z. Fecková, J. Steinheimer, B. Tomášik et al, Phys. Rev. C,93: 054906 (2016)

  • [32]

    S. Wheaton, J. Cleymans, and M. Hauer, Computer Physics Communications,180: 84 (2009)

  • [33]

    S. Bass et al, Prog. Part. and Nucl. Phys.,41: 255 (1998)

  • [34]

    J. Adam et al (STAR), Phys. Rev. C,99: 064905 (2019), arXiv:1903.11778[nucl-ex

  • [35]

    L. Adamczyk et al (STAR Collaboration), Phys. Rev. Lett.,121: 032301 (2018)

  • [36]

    N. Yu (STAR Collaboration), Nucl. Phys. A,967: 788 (2017)

  • [37]

    Dingwei Zhang (STAR Collaboration), Talk at NN2018:http://www.e-side.co.jp/NN2018/media/files/0084.pdf

  • [38]

    A. Bzdak, S. Esumi, V. Koch et al, (2019), arXiv: 1906.00936[nucl-th]

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