Measuring space-time structure of Δ(1232) resonance with the HBT correlations in double pion photoproduction around 1 GeV

Q. He,Hisako Fujimura,H. Fukasawa,Ryo Hashimoto,Y. Honda,Takeshi Ishikawa,Takahiro Iwata,S. Kaida,Hiroki Kanda,Jirohta Kasagi,A. Kawano,S. Kuwasaki,Kazushige Maeda,Shinichi Masumoto,Manabu Miyabe,Fusashi Miyahara,K. Mochizuki,N. Muramatsu,A. Nakamura,K. Nawa,S. Ogushi,Y. Okada,Y. Onodera,K. Ozawa,Y Sakamoto,Mitsuhiro Sato,Hajime Shimizu,H. Sugai,Koutaku Suzuki,Y. Tajima,Shinichiro Takahashi,Y. Taniguchi,Y. Tsuchikawa,Hiromichi Yamazaki,R. Yamazaki,H. Y. Yoshida

Measuring space-time structure of Δ(1232) resonance with the HBT correlations in double pion photoproduction around 1 GeV

2020

Spatial-temporal properties of Δ(1232) resonance produced in double neutral pion photoproduction are investigated through HBT correlations of two identical pions. For this end, we develop a model in which the HBT correlations are measured in the reference frame of Δ at rest. A very preliminary result of the two pion correlation is obtained, showing the Gaussian radius of the intermediate resonance state (Δ (1232) dominant) is about 0.71±0.02 fm.

Keywords:

Space time
Resonance
Heterojunction bipolar transistor
Pion
Nuclear physics
Physics

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