¹ From ${{\mathit \pi}^{+}}$ ${{\mathit p}}$ $\rightarrow$ ( ${{\mathit \Lambda}}{{\mathit \pi}^{+}}$) ${{\mathit K}^{+}}$ . $\mathit J$ $>{}^{}1/2{}^{}$ is not required by the data.

² From ${{\mathit \pi}^{+}}$ ${{\mathit p}}$ $\rightarrow$ ( ${{\mathit \Lambda}}{{\mathit \pi}^{+}}$) ( ${{\mathit K}}{{\mathit \pi}}$) ${}^{+}$. $\mathit J$ $>{}^{}1/2{}^{}$ is indicated, but large background precludes a definite conclusion.

³ See the ${{\mathit \Sigma}{(1670)}}$ Listings. AGUILAR-BENITEZ 1970B with three times the data of PRIMER 1968 find no evidence for the ${{\mathit \Sigma}{(1690)}}$.

⁴ This analysis, which is difficult and requires several assumptions and shows no unambiguous ${{\mathit \Sigma}{(1690)}}$ signal, suggests $\mathit J{}^{P} = 5/2{}^{+}$. Such a state would lead all previously known ${{\mathit Y}^{*}}$ trajectories.

References:

GODDARD

1979

PR D19 1350

${{\mathit Y}^{*}}{{\mathit K}}$ and ${{\mathit Y}^{*}}{{\mathit K}^{*}}$ Production in ${{\mathit \pi}^{+}}{{\mathit p}}$ Interactions at 10.3 ${\mathrm {GeV/}}\mathit c$

ADERHOLZ

1969

NP B11 259

Strange Particle Production in 8 ${\mathrm {GeV/}}\mathit c$ Positive Pion Interactions in Hydrogen

BLUMENFELD

1969

PL 29B 58

Formation of the ${{\mathit Y}_{{1}}^{*}{(1616)}}$ and ${{\mathit Y}_{{1}}^{*}{(1700)}}$ in ${{\mathit K}_L^0}$ ${{\mathit p}}$ Interactions

MOTT

1969

PR 177 1966

Study of ${{\mathit K}^{-}}{{\mathit p}}$ Interactions at 4.1 and 5.5 ${\mathrm {GeV/}}\mathit c$: Final States with Two Charged Particles and a Visible ${{\mathit \Lambda}}$

PRIMER

1968

PRL 20 610

Study of ${{\mathit Y}_{{1}}^{*}{(1660)}}$ and ${{\mathit Y}_{{1}}^{*}{(1690)}}$ Production in ${{\mathit K}^{-}}{{\mathit p}}$ Interactions

SIMS

1968

PRL 21 1413

Partial Wave Analysis of the Sequential Reaction ${{\mathit K}^{-}}$ ${{\mathit n}}$ $\rightarrow$ ${{\mathit Y}_{{1}}^{*}{(1385)}}{{\mathit \pi}}$ $\rightarrow$ ${{\mathit \Lambda}}{{\mathit \pi}}{{\mathit \pi}}$ in the Center-of-Mass Energy Range 1600-1740 MeV

COLLEY

1967

PL 24B 489

Production of a ${{\mathit Y}_{{1}}^{*}{(1700)}}$ in ${{\mathit K}^{-}}{{\mathit p}}$ Collisions at 6 ${\mathrm {GeV/}}\mathit c$