Event-by-event hadron ratio fluctuations from Au+Au collisions at RHIC-STAR

• Authors: Jian Tian
• Languages of publication: EN

Abstracts

EN

We present measurements of event-by-event fluctuations on hadron multiplicity ratios (K/π, p/π, K/p) in Au+Au collisions at $\sqrt {s_{NN} } $ and 200 GeV using the STAR detector at RHIC. The magnitude of dynamical fluctuations σ
dyn for p/π and K/p ratios change smoothly from a large negative value at 7.7 GeV to a smaller negative value at 200 GeV while that for the K/π ratios exhibits no significant beam energy dependence. The dynamical fluctuations related to pair production σ
dynpair dyn for the p/K, K/p, K
−/K
+ and p/p ratios at 200 GeV all exhibit a maximum at the mid-central collisions and decrease at the most peripheral and most central collisions.

Keywords

EN

Heavy ion collisions; hadron ratio fluctuations; phase transition; critical point

• Publisher: De Gruyter Open
• Journal: Open Physics
• Year: 2012
• Volume: 10
• Issue: 6
• Pages: 1365-1368

Dates

published

1 - 12 - 2012

online

4 - 12 - 2012

Contributors

author

Jian Tian

• Nuclear Physics Division, Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai, 201800, China

References

• [1] H. Heiselberg, Phys. Rep. 351, 161 (2001) http://dx.doi.org/10.1016/S0370-1573(00)00140-X[Crossref]
• [2] F. Karsch, Proceedings of Science CPOD07, 026 (2007)
• [3] M. M. Aggarwal et al. (STAR Collaboration), arXiv:1007.2613v1 [nucl-ex]
• [4] B. I. Abelev et al. (STAR Collaboration), Phys. Rev. Lett. 103, 092301 (2009) http://dx.doi.org/10.1103/PhysRevLett.103.092301[Crossref]
• [5] J. Tian (STAR Collaboration), J. Phys. G 37, 094044 (2010) http://dx.doi.org/10.1088/0954-3899/37/9/094044[Crossref]
• [6] T. Tarnowsky (STAR Collaboration), J. Phys. G 38, 124054 (2011) http://dx.doi.org/10.1088/0954-3899/38/12/124054[Crossref]
• [7] M. Anderson et al., Nucl. Instrum. Meth. A 499, 659 (2003) http://dx.doi.org/10.1016/S0168-9002(02)01964-2[Crossref]
• [8] W. J. Llope et al., Nucl. Instrum. Meth. A 522, 252 (2004) http://dx.doi.org/10.1016/j.nima.2003.11.414[Crossref]
• [9] S. V. Afanasiev et al. (NA49 Collaboration), Phys. Rev. Lett. 86, 1965 (2001) http://dx.doi.org/10.1103/PhysRevLett.86.1965[Crossref]
• [10] C. Alt et al. (NA49 Collaboration), Phys. Rev. C 79, 044910 (2009) http://dx.doi.org/10.1103/PhysRevC.79.044910[Crossref]
• [11] C. Pruneau, S. Gavin, S. Voloshin, Phys. Rev. C 66, 044904 (2002) http://dx.doi.org/10.1103/PhysRevC.66.044904[Crossref]
• [12] Z. W. Lin, C. M. Ko, B. A. Li, S. Pal, Phys. Rev. C 72, 064901 (2005) http://dx.doi.org/10.1103/PhysRevC.72.064901[Crossref]
• [13] W. Ehehalt, W. Cassing, Nucl. Phys. A 602, 449 (1996) http://dx.doi.org/10.1016/0375-9474(96)00097-8[Crossref]
• [14] S. A. Bass et al., Prog. Part. Nucl. Phys. 41, 255 (1998) http://dx.doi.org/10.1016/S0146-6410(98)00058-1[Crossref]
• [15] T. Anticic et al. (NA49 Collaboration), Phys. Rev. C 83, 061902 (2011) http://dx.doi.org/10.1103/PhysRevC.83.061902[Crossref]
• [16] B. I. Abelev et al. (STAR Collaboration), Phys. Rev. C 79, 034909 (2009) http://dx.doi.org/10.1103/PhysRevC.79.034909[Crossref]

Identifiers

DOI

10.2478/s11534-012-0145-5