Definition of Z particle
: a neutral elementary particle about 90 times heavier than a proton that along with the W particle is a transmitter of the weak force
— called also Z0, Z0 particle
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“Z particle.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/Z%20particle. Accessed 3 Mar. 2021.
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The first known use of Z particle was in 1979
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