Marian Danysz

{{Short description|Polish physicist (1909–1983)}}

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Marian Danysz (March 17, 1909 – February 9, 1983) was a Polish physicist, Professor of Physics at Warsaw University.

Son of Jan Kazimierz Danysz. In 1952, he co-discovered with Jerzy Pniewski a new kind of matter, an atomic nucleus, which alongside a proton and neutron contains a third particle: the lambda hyperon ({{SubatomicParticle|Lambda0}}).{{Cite journal |last=Wróblewski |first=Andrzej K. |date=2004 |title=HYPERNUCLEI (AND STRANGE PARTICLES) — HOW IT ALL BEGAN? |url=https://www.actaphys.uj.edu.pl/fulltext?series=Reg&vol=35&page=901 |journal=Acta Physica Polonica B |volume=35 |issue=3 |pages=901–927 }}

Ten years later, they obtained a hypernucleus in excited state, and the following year a hypernucleus with two lambda hyperons.