HEPData Search

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Vector Resonances Around 1.6-{GeV} of the $\eta \pi^+ \pi^-$ System in the $\pi^- p$ Charge Exchange Reaction at 8.95-{GeV}/$c$

Fukui, S. ; Horikawa, N. ; Inaba, S. ; et al.

Phys.Lett.B 202 (1988) 441-446, 1988.

Inspire Record 261402 DOI 10.17182/hepdata.29989

High statistics data of the ηππ system in π − p → ηπ + π − n were obtained. A partial wave analysis was performed in the mass region between 1.37 and 1.85 GeV. Resonant structures were observed in the IJ PC = 11 −− wave around 1.6 GeV and in 13 −− around 1.7 GeV. The structure in 11 −− was fitted with a single Breit-Wigner and also fitted with two Breit-Wigner's. The result suggests the possible existence of two vector resonances around 1.6 GeV. The structure in 13 −− is considered to be the π 3 (1690).

3 data tables

Table 1

Result of single Breit Wigner fit around 1.6 GeV. Called here $M(1635).

Table 2

Results of double Breit Wigner fit around 1.6 GeV. $M(1446) and $M(1701).

Table 3

Result of Breit Wigner fit around 1.7 GeV.

Observation of the Charmed Baryon $\Lambda(c$) in $e^+ e^-$ Annihilation at 10-{GeV}

The ARGUS collaboration Albrecht, H. ; Bockmann, P. ; Glaser, R. ; et al.

Phys.Lett.B 207 (1988) 109-114, 1988.

Inspire Record 260826 DOI 10.17182/hepdata.29980

Using the ARGUS detector at DORIS II, we have studied the production of the charmed baryon Λ c in e + e − annihilation at centre-of-mass energies near 10 GeV. The Λ c + was seen in the three decay modes pK − π + , Λπ + π − π + and K̄ 0 p, with products of normalized cross section times branching ratio [ R ·Br] of (10.8±1.4±1.2)×10 −3 , 6.6±1.5±0.9)×10 −3 and (6.7±1.4±0.8)×10 −3 respectively. The measured mass for the Λ c was (2283.1±1.7±2.0) MeV/ c 2 . A limit on the decay rates to Λπ + is reported. The fragmentation function of the Λ c was measured.

2 data tables

Table 1

Data requested from authors.

Table 2

No description provided.

Two Particle Correlations in 360-{GeV}/$c $p p Interactions

The EHS-RCBC collaboration Bailly, J.L. ; Banerjee, S. ; Bruyant, F. ; et al.

Z.Phys.C 40 (1988) 13, 1988.

Inspire Record 261311 DOI 10.17182/hepdata.15605

Two particle correlations of hadrons produced in 360 GeV/cpp interactions are investigated in the transverse plane and in rapidity. The data were obtained at the European hybrid spectrometer equipped with a rapid cycling bubble chamber. The observed transverse and rapidity correlations are compared with the one string LUND-and a two string dual parton-model. These models predict in general stronger correlations in the transverse plane and much weaker correlations in rapidity than found in the data. The LUND-FRITIOF-and multichain dual parton models provide a better reproduction of the data, although the agreement is not yet satisfactory. Only the UA5 cluster model GENCL shows agreement with the data.

1 data table

Table 1

No description provided.

Comparison of the Particle Flow in $q \bar{q} \gamma$ and $q \bar{q} g$ Events From $e^+ e^-$ Annihilations at {PETRA}

The JADE collaboration Saada, F.Ould ; Allison, J. ; Ambrus, K. ; et al.

Z.Phys.C 39 (1988) 1, 1988.

Inspire Record 260834 DOI 10.17182/hepdata.15623

The particle flow distributions in the event plane of 3-jet$(e^ +e^ -\to q\bar qg)$ and of radiative 2-jet$(e^ +e^ -\to q\bar q\gamma )$ events are compared at a centre of mass energy of 35 GeV. The number of particles in the angular region opposite to the gluon in$q\bar qg$ events is found to be significantly reduced relative to the number of particles in the region opposite to the hard photon in$q\bar q\gamma $ events. This depletion is expected from the “string effect” observed in 3-jet events. It can be explained within the framework of QCD as arising from soft gluon interference.

1 data table

Table 1

Data requested from authors.

Measurement of the Difference in R = $\sigma^-$l / $\sigma^-$t and $\sigma$(a) / $\sigma(D$) in Deep Inelastic $e D$, $e$ Fe and $e$ Au Scattering

Dasu, S. ; de Barbaro, P. ; Bodek, A. ; et al.

Phys.Rev.Lett. 60 (1988) 2591, 1988.

Inspire Record 260760 DOI 10.17182/hepdata.20155

We measured the differences in R=σLσT and the cross-section ratio σAσD in deep-inelastic electron scattering from D, Fe, and Au nuclei in the kinematic range 0.2≤x≤0.5 and 1≤Q2≤5 (Gev/c)2. Our results for RA−RD are consistent with zero for all x and Q2, indicating that possible contributions to R from nuclear higher-twist effects and spin-0 constituents in nuclei are not different from those in nucleons. The European Muon Collaboration effect is reconfirmed, and the low-x data from all recent experiments, at all Q2, are now in agreement.

4 data tables

Table 1

No description provided.

Table 2

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Vector Resonances Around 1.6-{GeV} of the $\eta \pi^+ \pi^-$ System in the $\pi^- p$ Charge Exchange Reaction at 8.95-{GeV}/$c$

Observation of the Charmed Baryon $\Lambda(c$) in $e^+ e^-$ Annihilation at 10-{GeV}

Two Particle Correlations in 360-{GeV}/$c $p p Interactions

Comparison of the Particle Flow in $q \bar{q} \gamma$ and $q \bar{q} g$ Events From $e^+ e^-$ Annihilations at {PETRA}

Measurement of the Difference in R = $\sigma^-$l / $\sigma^-$t and $\sigma$(a) / $\sigma(D$) in Deep Inelastic $e D$, $e$ Fe and $e$ Au Scattering

OBSERVATION OF psi PRODUCTION IN e+ e- ANNIHILATION AT 29-GeV

Inclusive production of $\varrho^{0}$ and f$_{2}$ mesons in $\pi^{-}p$ interactions at 360 GeV/c

Asymmetry in $\bar{p} p$ Elastic Scattering

Cross Sections for Neutrino Production of Charmed Particles

rivet Analysis
Charm Production in Nonresonant e+ e- Annihilations at s**(1/2) = 10.55-GeV