S. Blessing

Preliminary partial-wave analysis of the K+KOs π− system produced in 8 GeV/c K−p interactions

Abstract We have performed a partial-wave analysis of the K + K O S π − system produced in the reaction K − p → K + K 0 S π − Λ / Σ at 8 GeV/c. We present results of a preliminary analysis of approximately 2000 events in the KKπ mass range 1.24–1.64 GeV, with 0.0 2 . In the 1.28 GeV mass region, we observe a small J PG = 0 −+ contribution but little indication of a 1 ++ wave. We observe a large enhancement of events at the threshold of KK ∗ production. Above this threshold the J PG = 1 +− , 1 ++ and 0 −+ waves all contribute, and we see evidence for a 1 +− resonance below the KK ∗ threshold.

Mass dependent fits of the partial wave analysis of the K+K̄0π− system

We have performed a partial wave analysis of the K+K0Sπ− system produced in the reaction π−p → K+K0π−n at GeV/c. We present the mass dependent fits to the PWA results for the waves JPG(isobar)=0−+(α0), 0−+(K*), 1++(α0) and 1++(K*).

Preliminary results of p̄p at 8 GeV/c

We are studying the reaction pp→K+K°π−X and pp→Λpπ X. We present mass spectra for the systems produced in these reactions. The data respresent one‐half of the total data collected.

Partial wave analysis of KKπ from pp → K+K0π−X at 8 GeV/c

Abstract We present the results of an amplitude analysis of the spin parity components as a function of mass of the ( K + K 0 π − ) system as produced in the reaction p p → (K + K 0 π − ) X . Two peaks are observed in the ( K + K 0 π − ) spectrum, one at (1279 ± 2) MeV/c 2 , and one at (1417 ± 3) Mev/c 2 with a width of (62 ± 5) Mev/c 2 . The amplitude analysis was performed in sixteen 20 MeV/c 2 mass intervals from 1.24 to 1.56 GeV/c 2 . The waves used for the fitting were J PG = 0 −+ , 1 ++ , 1 +− , and background.