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Decay distributions in the reaction k+ p ---> k*0(1420) delta++ at 5 gev/c and quark model predictions

Eskreys, A. ; Malecki, P. ; Zalewski, K. ; et al.

Nucl.Phys.B 29 (1971) 587-600, 1971.

Inspire Record 68631 DOI 10.17182/hepdata.33559

Joint decay distributions have been studied in the reaction K + p → K ∗o (1420)Δ ++ at 5.0 GeV/ c in the transversity spin reference frame. Two alternative spin-parity assignments 2 + and 3 − for the K ∗ resonance have been considered and a comparison with the quark-model predictions has been made. The predictions of the quark model are equally well satisfied by the experimental results for both the 2 + and 3 − spin-parity assignments.

1 data table

Table 1

No description provided.

Study of the k0 lambda and k0 sigma0 final states from pi- p interactions at 3.9 gev/c

Abramovich, M. ; Blumenfeld, H. ; Chaloupka, V. ; et al.

Nucl.Phys.B 27 (1971) 477-485, 1971.

Inspire Record 68729 DOI 10.17182/hepdata.33623

Differential cross sections and polarizations have been measured for the reaction π − p → K 0 Λ and π − p → K 0 Σ 0 at 3.9 GeV/ c π − momentum. Comparison of these data with those of the related reactions K − n → π − Λ and K − p → π − Σ + (at approximately the same c.m. energy) indicate that simple Regge-pole models involving only K ∗ (890) and K ∗ (1420) exchange are unable to describe all the features of the data. On the other hand, comparison of the π − p → K 0 Σ 0 data with that of π + p → K + Σ + shows that the data are consistent with absence of exotic strange-meson exchange.

1 data table

Table 1

No description provided.

K- p elastic scattering at 10-GeV/c

The Aachen-Berlin-CERN-London-Vienna collaboration Bartsch, J. ; Deutschmann, M. ; Kraus, G. ; et al.

Nucl.Phys.B 29 (1971) 398-404, 1971.

Inspire Record 68635 DOI 10.17182/hepdata.33567

Results are presented on elastic scattering of 10.1 GeV/ c K − mesons on protons, based on a sample of 16 261 kinematically-fitted bubble-chamber events. The differential cross section is given over the | t |- range of 0.06 to 2.5 GeV 2 and is fitted with the expressions a e bt , A e Bt + Ct 2 and ( P e Qt + Re St ) over various intervals of t . The results are compared with those of other experiments at nearby energies. Upper limits of | α | < 0.28 and σ B < 0.4 μ b (both at a 90% confidence level) are given for the ratio of real to imaginary part of the forward-scattering amplitude and the backward-elastic-scattering cross section, respectively.

3 data tables

Table 1

No description provided.

Table 2

ERROR INCLUDES STATISTICAL ERROR AND ERROR IN TOTAL CROSS SECTION USED FOR NORMALIZATION. EXTRAPOLATION OF D(SIG)/DT TO T=0 PROVIDES ABOUT 0.5 PCT UNCERTAINTY.

Table 3

NO BACKWARD EVENTS OBSERVED. LARGEST ANGLE EVENT SEEN WAS AT 64 DEG (-T = 2.33 GEV**2).

Study of k*0(892) delta++(1236) production from k+ p interactions at 3 gev/c

Buchner, K. ; Dehm, G. ; Goebel, G. ; et al.

Nucl.Phys.B 29 (1971) 381-397, 1971.

Inspire Record 68636 DOI 10.17182/hepdata.33527

The reaction K + p → K ∗o (892) Δ ++ (1236) has been studied at 3 GeV/ c in both a hydrogen and a deuterium bubble chamber experiment. The production mechanism is described by a Regge-type model using π- and B-exchange. The joint decay distributions are analysed in various frames and compared with quark-model predictions.

19 data tables

Table 1

No description provided.

Table 2

No description provided.

Table 3

No description provided.

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Photoproduction of k+ lambda and k+ sigma0 in hydrogen between 1.19 and 1.68 gev

Goeing, H. ; Schorsch, W. ; Tietge, J. ; et al.

Nucl.Phys.B 26 (1971) 121-133, 1971.

Inspire Record 68818 DOI 10.17182/hepdata.33752

New measurements on the reactionsγp→K + Λ and γp→K + Σ o have been performed at the DESY synchrotron at c.m. angles around 90° and photon lab. energies from 1.19 to 1.68 GeV. The produced K + mesons were analyzed by a magnet spectrometer, two thresholdCˇerenkov counters and a time-of-flight measurement. The obtained differential cross-section data show a smooth energy behaviour for the K + Λ production whereas for theK + Σ o production the data trace out a bump at a c.m. energy W ≈ 1.9GeV.

2 data tables

Table 1

No description provided.

Table 2

No description provided.

Determination of the photoproduction phase of rho0 mesons

Alvensleben, H. ; Becker, U. ; Chen, M. ; et al.

Nucl.Phys.B 25 (1971) 342-350, 1971.

Inspire Record 68820 DOI 10.17182/hepdata.33835

We have measured large-angle electron-positron pairs from the reaction γ +Be → Be+e + +e − in the e + e − invariant-mass region of 610 < m < 850 MeV/ c 2 . The phase of the photoproduction amplitude of the ϱ-meson at 4.1 – 6.1 GeV was found to deviate from pure imaginary by 11.8° ± 4.4° which corresponds to a ratio of the real to imaginary ϱ-nucleon amplitude of β = −0.2 ± 0.1.

1 data table

Table 1

No description provided.

Small momentum transfer pi+ production with linearly polarized photons

Burfeindt, H. ; Buschhorn, G. ; Geweniger, C. ; et al.

Phys.Lett.B 33 (1970) 509-510, 1970.

Inspire Record 69381 DOI 10.17182/hepdata.28537

Previous measurements of the cross section asymmetry for single π + production on protons with linearly polarized photons of 3.4 GeV have been extended to momentum transfers within the forward peak, i.e. − = 0.0026, 0.006 and 0.01 (GeV/ c ) 2 . The results are in good agreement with pion exchange models.

1 data table

Table 1

Axis error includes +- 6/6 contribution.

Electromagnetic proton form-factors at squared four momentum transfers between 1-GeV/c2 and 3-GeV/c2

Bartel, W. ; Busser, F.W. ; Dix, W.R. ; et al.

Phys.Lett.B 33 (1970) 245-248, 1970.

Inspire Record 63047 DOI 10.17182/hepdata.45284

Electron-proton elastic scattering cross sections have been measured at four-momentum transfers between 1.0 and 3.0 (GeV/ c ) 2 and at electron scattering angles between 10° and 20° and at about 86° in the laboratory. The proton electromagnetic form factors G E and G M were determined. The results indicate that G E ( q 2 ) decreases faster with increasing q 2 than G M ( q 2 ).

2 data tables

Table 1

Axis error includes +- 2.5/2.5 contribution (Due to counting statisticss, separation of elastic events, beam monitoring, incident energy, scattering angle, proton absorption, solid angle, target length and density).

Table 2

CONST(NAME=MU) is the magnetic moment.