HEPData Search

The inclusive process π++P→K¯ *0(890)+X is studied at 16 GeV/c using a 2-m streamer chamber containing a central liquid hydrogen target. From photographs triggered by detection of a forward K− meson, the signal K¯ K−*0π+ is extracted. The inclusive rate for K¯ * production into the forward hemisphere σ(xF>0.3) is 115±27 μb; the pT2 distribution is found to have a slope constant of 3.3±0.6 (GeV/c)2. The Feynman-x distribution for K¯ *0 is consistent with a Kuti-Weisskopf model in which the valence and sea quarks of the incident pion interact with only the sea quarks of the target proton.

2 data tables

Table 1

No description provided.

Table 2

No description provided.

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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rivet Analysis
Measurement of $s d \sigma$ / Dx for Hadron Production by $e^+ e^-$ Annihilation at $\sqrt{s}=5$.2-{GeV}, 6.5-{GeV} and 29.0-{GeV}

Patrick, J.F. ; Luth, V. ; Siegrist, J. ; et al.

Phys.Rev.Lett. 49 (1982) 1232, 1982.

Inspire Record 178416 DOI 10.17182/hepdata.20599

Measurements are presented of the inclusive charged-particle cross sections s dσdx for e+e− annihilation at center-of-mass energies of 5.2, 6.5, and 29.0 GeV. Significant scale breaking is observed in these cross sections.

1 data table

Table 1

CROSS SECTION S*D(SIG)/DX FOR CHARGED PARTICLES AT SQRT(S) = 5.2, 6.5 AND 29.0 GEV. NUMERICAL VALUES OF DATA TAKEN FROM THESIS OF J.F. PATRICK LBL-14585.

rivet Analysis
Hadron Production by e+ e- Annihilation at Center-Of-Mass Energies Between 2.6 GeV and 7.8 GeV: Part 1. Total Cross-Section, Multiplicities and Inclusive Momentum Distributions

Siegrist, J. ; Schwitters, R. ; Alam, M.S. ; et al.

Phys.Rev.D 26 (1982) 969, 1982.

Inspire Record 169326 DOI 10.17182/hepdata.23889

Measurements of multihadron production in e+e− annihilation at center-of-mass energies between 2.6 and 7.8 GeV are presented. Aside from the narrow resonances ψ(3095) and ψ(3684), the total hadronic cross section is found to be approximately 2.7 times the cross section for the production of muon pairs at c.m. energies below 3.7 GeV and 4.3 times the muon-pair cross section at c.m. energies above 5.5 GeV. Complicated structure is found at intermediate energies. Charged-particle multiplicities and inclusive momentum distributions are presented.

7 data tables

Table 1

ERRORS ARE STATISTICAL ONLY.

Table 2

ERRORS INCLUDE SYSTEMATICS.

Table 3

R WITH SMALLER BINNING AROUND RESONANCE REGION. ERRORS ARE STATISTICAL ONLY.

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rivet Analysis
Inclusive $K^0$ Production in $e^+ e^-$ Annihilation for 9.3-{GeV} $<\sqrt{s}<$ 31.6-{GeV}

The PLUTO collaboration Berger, Christoph ; Genzel, H. ; Grigull, R. ; et al.

Phys.Lett.B 104 (1981) 79-83, 1981.

Inspire Record 165122 DOI 10.17182/hepdata.6716

Results on inclusive K s 0 production in e + e − annihilation at mean center-of-mass energies of 9.4, 12.0 and 30 GeV are presented. The ratio R (K 0 ) = 2 σ (K s 0 )/ σ μμ rises from 3.10 ± 0.75 at √ s = 9.4 GeV to 5.6 ± 1.2 at √ s = 30 GeV, corresponding to an approximately constant K 0 /charged-particle ratio of 0.12 ± 0.02. A similar ratio for K 0 / charged particle is observed for direct hadronic decays of the ϒ.

7 data tables

Table 1

SYSTEMATIC ERROR INCLUDED.

Table 2

NUMBER OF K0 PER HADRONIC EVENT. AUTHORS ALSO USE MULTIPLICITY TO ESTIMATE NUMBER OF K0 PER CHARGED PARTICLE.

Table 3

INCLUDING EARLIER DATA.

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Inclusive $D$ Meson Production With the Mark-{II} Detector at {SPEAR}

Coles, Mark Wayne ;

LBL-11513, 1980.

Inspire Record 155654 DOI 10.17182/hepdata.38164

None

4 data tables

Table 1

CHARGED AND NEUTRAL D MESON INCLUSIVE CROSS SECTIONS.

Table 2

RATIO R FOR D PRODUCTION - THE FACTOR OF TWO ACCOUNTS FOR THE FACT THAT CHARMED PARTICLES ARE PRODUCED IN PAIRS.

Table 3

FIT TO D AND D* PRODUCTION IN THRESHOLD REGION. RESULTS FOR ANISOTROPIC FIT (ASSUMING ISOTROPIC D* DECAY IS ALMOST IDENTICAL).

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Hadron Production by $e^+ e^-$ Annihilation at Center-of-mass Energies Between 2.6 GeV and 7.8 GeV

Siegrist, James Leon ; Schwitters, Roy F. ;

SLAC-R-0225, 1979.

Inspire Record 143687 DOI 10.17182/hepdata.18825

Results are presented on multihadron production by e+e- annihilation from the Mark I and Mark II detectors at SPEAR. Other-than the narrow resonances psi(3095) and psi'(3634), the total hadronic cross section varies between 36.5 and 6.4 nb over the center-of-mass energy range 2.6 to 7.8 GeV with complicated structure near 4.1 GeV not completely resolved by these measurements. Evidence for scaling of inclusive momentum distributions of hadrons is presented.

3 data tables

Table 1

No description provided.

Table 2

MORE DETAILED TABULATION OF R IN THE TRANSITION REGION.

Table 3

CHARGED SINGLE PARTICLE INCLUSIVE DISTRIBUTIONS FROM THIS EXPERIMENT ARE GIVEN IN THE RECORD OF G. G. HANSON, TBILISI CONFERENCE 1976, SLAC-PUB-1814.

rivet Analysis
Charged Pion, Kaon and Nucleon Production by e+ e- Annihilation for C.M. Energies Between 3.6-GeV and 5.2-GeV

The DASP collaboration Brandelik, R. ; Braunschweig, W. ; Martyn, H.U. ; et al.

Nucl.Phys.B 148 (1979) 189-227, 1979.

Inspire Record 132045 DOI 10.17182/hepdata.34826

Inclusive production of ifπ ± , K ± and p has been studied near charm threshold for c.m. energies between 3.6 and 5.2 GeV. Differential and scaling cross sections together with particle multiplicities have been determinated. By comparing data below and above charm threshold the charm contribution to if π ± and K ± production has been extracted. A comparison has been made between inclusice p production and inelastic electron-proton scattering. To study differences between three-gluon annihilation and two-quark production of the spectra from J/ decay and from non-resonant production at 3.6 GeV has been compared.

35 data tables

Table 1

No description provided.

Table 2

No description provided.

Table 3

No description provided.