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Csörgo T, Vértesi R, Sziklai J. Indirect observation of an in-medium η' mass reduction in √s NN =200  GeV Au+Au collisions. Phys Rev Lett. 2010;105(18):182301doi: 10.1103/PhysRevLett.105.182301.
Csörgo, T., Vértesi, R., & Sziklai, J. (2010). Indirect observation of an in-medium η' mass reduction in √s NN =200  GeV Au+Au collisions. Physical review letters, 105(18), 182301. https://doi.org/10.1103/PhysRevLett.105.182301
Csörgo, T, et al. "Indirect observation of an in-medium η' mass reduction in √s NN =200  GeV Au+Au collisions." Physical review letters vol. 105,18 (2010): 182301. doi: https://doi.org/10.1103/PhysRevLett.105.182301
Csörgo T, Vértesi R, Sziklai J. Indirect observation of an in-medium η' mass reduction in √s NN =200  GeV Au+Au collisions. Phys Rev Lett. 2010 Oct 29;105(18):182301. doi: 10.1103/PhysRevLett.105.182301. Epub 2010 Oct 25. PMID: 21231099.
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Phys Rev Lett. 2010 Oct 29;105(18):182301. doi: 10.1103/PhysRevLett.105.182301. Epub 2010 Oct 25.

Indirect observation of an in-medium η' mass reduction in √s NN =200  GeV Au+Au collisions.

Physical review letters

T Csörgo, R Vértesi, J Sziklai

Affiliations

  1. Department of Physics, Harvard University, 17 Oxford Street, Cambridge, Massachusetts 02138, USA.

PMID: 21231099 DOI: 10.1103/PhysRevLett.105.182301

Abstract

PHENIX Collaboration and STAR Collaboration data on the intercept parameter of the two-pion Bose-Einstein correlation functions in √ s{NN}=200  GeV Au+Au collisions are analyzed in terms of different models of hadronic multiplicities. To describe this combined PHENIX and STAR data set, an in-medium η' mass reduction of at least 200 MeV is needed, at the 99.9% confidence level in the considered model class. Such a significant η' mass modification may indicate the restoration of the U{A}(1) symmetry in a hot and dense hadronic matter and the return of the 9th "prodigal" Goldstone boson.

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