Squeezed correlations of bosons with nonzero widths for expanding sources

We explore the squeezed back-to-back correlation (SBBC) and investigate how the squeezing effect influences the Hanbury-Brown–Twiss (HBT) interferometry using an expanding Gaussian source with nonzero width. The SBBC and HBT of D 0 and ϕ mesons with finite in-medium widths are studied. The expanding...

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Veröffentlicht in:Physical review. C 2024-02, Vol.109 (2), Article 024902
Hauptverfasser: Zhang, Yong, Ru, Peng
Format: Artikel
Sprache:eng
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Zusammenfassung:We explore the squeezed back-to-back correlation (SBBC) and investigate how the squeezing effect influences the Hanbury-Brown–Twiss (HBT) interferometry using an expanding Gaussian source with nonzero width. The SBBC and HBT of D 0 and ϕ mesons with finite in-medium widths are studied. The expanding flow of the source may enhance the SBBC strength of D 0 D ¯ 0 and ϕ ϕ in the low momentum region but suppress the SBBC in the larger momentum region. The squeezing effect suppresses the influence of flow on the HBT radii, which is significant for two identical bosons with large pair momentum or with large mass. Due to the squeezing effect, the relationship between the HBT radii and the pair momentum exhibits nonflow behavior for the D 0 D 0 pair. Likewise, nonflow behavior also appears in the HBT radii of ϕ ϕ with large pair momentum. This phenomenon may bring new insights for studying the squeezing effect.
ISSN:2469-9985
2469-9993
DOI:10.1103/PhysRevC.109.024902