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A Study of rho and Omega Production in pi+ p Interactions at 15.7-GeV/c

Ferguson, Merl McDonald, Jr. ;

Phys.Rev.D 36 (1987) 1961, 1987.

Inspire Record 210652 DOI 10.17182/hepdata.12775

We report the results of a study of ρ and ω production in π+p interactions at 15.7 GeV/c. The SLAC hybrid bubble-chamber facility was used to study reactions in which neutral particles are produced. Three tantalum plates inside the 40-in. bubble chamber and a large array of lead glass downstream of the chamber provided photon detection over a large solid angle. Final states with two neutral particles have been isolated with kinematic fits in which neutral pions were reconstructed in the plates and lead glass. Data from an earlier untriggered π+p bubble-chamber experiment at 15 GeV/c were used to obtain samples of events in channels which did not trigger the hybrid system. Cross sections for ρ and ω production are given for several exclusive final states. Relative ρ and ω production rates are studied. The ratio of nondiffractive ω to ρ0 production is measured to be ω/ρ0=0.44±0.07. We estimate the inclusive ω cross section to be 1.9±0.3 mb. The results are compared to the Lund model of low-pT hadronic reactions.

9 data tables

Table 1

OMEGA cross sections have been corrected to allow for all decay modes.

Table 2

No description provided.

Table 3

No description provided.

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First observation of strong OZI rule violation in pi N interactions.

Ferrer, A. ; Grigorian, A.A. ; Perepelitsa, V.F. ; et al.

Phys.Lett.B 394 (1997) 395-402, 1997.

Inspire Record 426798 DOI 10.17182/hepdata.47710

The data of the CERN WA56 experiment that triggered the fast proton produced in the π + p and π − p interactions at beam momenta 20 GeV/c and 12 GeV/c, respectively, are used to analyse the final states pfΦ ( ω ) π ± . A large excess (up to two orders of magnitude) of the Φ ω cross sections ratio over the OZI prediction is observed.

10 data tables

Table 1

No description provided.

Table 2

No description provided.

Table 3

No description provided.

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OBSERVATION OF K (1629) MESONS

Karnaukhov, V.M. ; Coca, C. ; Moroz, V.I. ;

JINR-P1-87-559, 1987.

Inspire Record 251892 DOI 10.17182/hepdata.38970

None

1 data table

Table 1

No description provided.

AMPLITUDE ANALYSIS OF PION - NUCLEON SCATTERING AT 40-GeV/c

Siksin, V.V. ;

IFVE-87-64, 1987.

Inspire Record 249408 DOI 10.17182/hepdata.10164

None

2 data tables

Table 1

No description provided.

Table 2

No description provided.

LIMITS ON CHARM PRODUCTION IN HADRONIC INTERACTIONS NEAR THRESHOLD

Christenson, J.H. ; Hummel, E. ; Kreiter, G.A. ; et al.

Phys.Rev.Lett. 55 (1985) 154, 1985.

Inspire Record 16192 DOI 10.17182/hepdata.3274

We present the results of an experiment to search for associated charm production near threshold in 13-GeV/c π−p interactions. A large aperture PWC spectrometer was sensitive to the decay fragments of the forward-produced D*−’s expected from the two-body reactions π−+p→D*−+Λc+,Σc +,. . . . The missing baryon mass was determined from the vector momenta of the incident pion and the candidate D*−. No evidence for these reactions was found, which resulted in a 7-nb upper limit (95% confidence level) for each of the cross sections σ(π−p→D*−Λc+) and σ(π−p→D*−Σc+).

2 data tables

Table 1

Axis error includes +- 0.0/0.0 contribution (?////NOT GIVENDECAY-BR(BRN=D*(2010)- --> AD0 PI-,BR=64 IN PCT)//DECAY-BR(BRN=AD0 --> K+ PI-, BR=3 IN PCT)).

Table 2

No description provided.