Evidence of a new state at 1660 MeV/c2 observed in anti-n p annihilations
1994
A study of n ¯ p in-flight annihilations is presented. The 4π invariant mass spectrum resulting from the analysis of the five-prong exclusive events, following the annihilation of ∼ (100-297) MeV/c n ¯ , reveals, besides a large structure centred at ∼ 1500 MeV/c2, some evidences for a new state around 1660 MeV/c2
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