A study of event mixing for two-pion Bose-Einstein correlations in the {\gamma}p -> {\pi}^0 {\pi}^0 p reaction

H. Shimizu; H. Yamazaki; J. Ai; J. Ma; L. Ma; M. Miyabe; N. Muramatsu; Q. He; T. Ishikawa; T. Li

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arxiv 1701.06016 v1 pith:6UZBXRCM submitted 2017-01-21 nucl-ex

A study of event mixing for two-pion Bose-Einstein correlations in the {γ}p -> {π}⁰ {π}⁰ p reaction

Q. He , J. Ai , T. Ishikawa , T. Li , L. Ma , J. Ma , M. Miyabe , N. Muramatsu

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H. Shimizu Y. Tsuchikawa Y. Xiang H. Yamazaki Y. Zhang

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keywords mixingeventcorrelationsmixedtwo-pionbose-einsteineventsgamma

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We develop an event mixing technique with a missing mass consistency (MMC) cut and a pion energy (PE) cut for the measurement of two-pion Bose-Einstein correlations (BEC) in reactions with only two identical pions produced in the final state. A multi mixing mode that allows one event to be mixed with multiple other events is proposed for the purpose of improving the statistics of mixed samples, and compared with the single mixing mode which requires one original event can be mixed only once. Numerical tests using the {\gamma}p -> {\pi}^0 {\pi}^0 p events are used to testify its ability to measure two-pion correlations. To improve the mixing speed, the optimal MMC cut window is also explored via simulations.

A study of event mixing for two-pion Bose-Einstein correlations in the {γ}p -> {π}⁰ {π}⁰ p reaction

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