Abstract
It is interesting to see how the space-time characteristics of the region of particle emission created during nuclear collisions change as the colliding nuclei get bigger. At an energy of 200 GeV per nucleon pair, the STAR experiment allows one to investigate the properties of the created medium for two colliding systems with nearly identical sizes: p + Au and d + Au. As a result, the difference in particle emission region properties introduced by just one more nucleon may be detected. Using the femtoscopy technique it becomes possible to perform this measurement. The paper investigates the dependence of the emission region’s invariant radii on the transverse momentum of pion pairs for various multiplicities in the p + Au and d + Au collision systems. The physical implication is also presented in this paper.
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REFERENCES
S. Pratt, “Pion interferometry of quark-gluon plasma,” Phys. Rev. D 33, 1314–1327 (1986).
A. Bzdak, B. Schenke, P. Tribedy, and R. Venugopalan, “Initial state geometry and the role of hydrodynamics in proton-proton, proton-nucleus and deuteron-nucleus collisions,” Phys. Rev. C 87, 10 (2013).
C. Plumberg, “Hanbury Brown–Twiss Interferometry and collectivity in small systems,” arXiv:2008.01709.
G. Goldhaber, W. B. Fowler, S. Goldhaber, and T. F. Hoang, “Pion-pion correlations in antiproton annihilation events,” Phys. Rev. Lett. 3, 181–183 (1959).
G. Goldhaber, S. Goldhaber, W.-Y. Lee, and A. Pais, “Influence of Bose–Einstein statistics on the anti-proton proton annihilation process,” Phys. Rev. 120, 300–312 (1960).
G. I. Kopylov and M. I. Podgoretsky, “Correlations of identical particles emitted by highly excited nuclei,” Sov. J. Nucl. Phys. 15, 219–223 (1972).
G. I. Kopylov and M. I. Podgoretsky, “Multiple production and interference of particles emitted by moving sources,” Sov. J. Nucl. Phys. 18, 336–341 (1974).
G. I. Kopylov, “Like particle correlations as a tool to study the multiple production mechanism,” Phys. Lett. B 50, 472–474 (1974).
M. G. Bowler, “Coulomb corrections to Bose–Einstein correlations have been greatly exaggerated,” Phys. Lett. B 270, 69–74 (1991).
Yu. Sinyukov, R. Lednicky, S. V. Akkelin, J. Pluta, and B. Erazmus, “Coulomb corrections for interferometry analysis of expanding hadron systems,” Phys. Lett. B 432, 248–257 (1998).
M. G. Bowler, “Coulomb corrections to Bose-Einstein correlations have been greatly exaggerated,” Phys. Lett. B 270, 69–74 (1991).
Yu. Sinyukov, R. Lednicky, S. V. Akkelin, J. Pluta, and B. Erazmus, “Coulomb corrections for interferometry analysis of expanding hadron systems,” Phys. Lett. B 432, 248–257 (1998).
S. V. Akkelin and Yu. M. Sinyukov, “The HBT-interferometry of expanding sources,” Phys. Lett. B 356, 525–530 (1995).
M. Anderson et al., “The STAR time projection chamber: A unique tool for studying high multiplicity events at RHIC,” Nucl. Instrum. Methods Phys. Res., Sect. A 499, 659–678 (2003).
W. J. Llope et al., “The STAR vertex position detector,” Nucl. Instrum. Methods Phys. Res., Sect. A 759, 23—28 (2014).
J. Adams et al. (STAR Collab.), “Pion interferometry in Au + Au collisions at \(\sqrt {{{s}_{{NN}}}} = 200\) GeV,” Phys. Rev. C 71, 25 (2005).
Funding
The work was supported by the Ministry of Science and Higher Education of the Russian Federation, Project “Fundamental properties of elementary particles and cosmology” no. 0723-2020-0041.
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Khyzhniak, E., for the STAR Collaboration. Pion Femtoscopy in p/d + Au Collisions at \(\sqrt {{{s}_{{NN}}}} = 200\) GeV in the STAR Experiment. Phys. Part. Nuclei 54, 506–509 (2023). https://doi.org/10.1134/S1063779623030188
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DOI: https://doi.org/10.1134/S1063779623030188