Amirzadeh, T.
Birmingham-CERN-Glasgow-Michigan State-Paris
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Observation of a Xi* (2370) Produced in 8.25-{GeV}/$c K^- p$ Interactions

The Birmingham-CERN-Glasgow-Michigan State-Paris collaboration Amirzadeh, J. ; Baubillier, M. ; Bloodworth, I.J. ; et al.
Phys.Lett.B 90 (1980) 324-326, 1980.
Inspire Record 143786 DOI 10.17182/hepdata.27255

We observe production of a Ξ * (2370) in the reactions K − p→ [YK¯π] K, [YK¯π] Kπ and [ΩK] (K or Kπ) at 8.25 GeV/ c in a high statistics bubble chamber experiment. The mass and width are determined to be 2373 ± 8 MeV and 80 ± 25 MeV, respectively. The I = 1/2 assignment is strongly favoured.

1 data table
Table 1

CROSS SECTIONS FOR PRODUCTION OF XI(2370) --> (LAMBDA + SIGMA) AK PI. BREIT-WIGNER FIT WITH POLYNOMIAL BACKGROUND. XI(2370) PRODUCED BY BARYON EXCHANGE. CORRECTED FOR NEUTRAL DECAYS AND GEOMETRICAL LOSSES. <OMEGA-KAON> DECAY SEEN. OBSERVED RATIO OF CHARGED TO NEUTRAL XI(2370) PRODUCTION IS 2.7 +- 0.9.


Observation of a Narrow Hyperon State of Mass 3.17-{GeV}

The Birmingham-CERN-Glasgow-Michigan State-Paris & Cambridge-Michigan State collaborations Amirzadeh, J. ; Ansorge, R.E. ; Baubillier, M. ; et al.
Phys.Lett.B 89 (1979) 125-130, 1979.
Inspire Record 143109 DOI 10.17182/hepdata.27296

We present evidence for a narrow Y ∗ with a mass of 3.17 GeV and a width ⩽ 20 MeV decaying to ΣKK̄ + pions, ΛKK̄ + pions and ΞK + pions. The data come from two high statistics K − p bubble chamber experiments with a sensitivity of ≈100 eV/ μb at 8.25 GeV/ c and ≈ 45 eV/ μb at 6.5 GeV/ c .

1 data table
Table 1

OBSERVATION OF R(3170) ONLY DECAYING INTO 5 OR 6 PARTICLES (CROSS SECTION NOT CORRECTED FOR DECAYS WITH MORE THAN ONE UNSEEN FINAL STATE PARTICLE).