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A study of k pi pi states produced in 10 gev/c k+ p interactions

Barnham, K.W.J. ; Colley, D.C. ; Dodd, W.P. ; et al.
Nucl.Phys.B 25 (1970) 49-74, 1971.
Inspire Record 68842 DOI 10.17182/hepdata.33832

We present an analysis of the K ππ system produced in 10 GeV/ c K + p interactions. We show that the low-mass enchancement between 1.2 and 1.4 GeV/ c 2 on the K ππ mass spectrum is predominantly 1 + throughout, give the relative amplitudes for the decay of this system into K ∗ (890) π and K ρ , and offer new evidence for the presence of two 1 + resonances in this mass region.

2 data tables
Table 1

No description provided.

Table 2

DIFFERENTIAL CROSS SECTION FOR THREE MASS BANDS IN Q-REGION. NORMALIZATION UNCERTAIN - NO UNITS FOR D(SIG)/DT GIVEN ON FIGURE. NUMERICAL VALUES TAKEN FROM THE COMPILATION LST7V2 FOX 72B. ERRORS ADDED AS 1/SQRT(EVENTS).


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.


The photoproduction of eta mesons at small angles

Booth, P.S.L. ; Barton, J.S. ; Carroll, L.J. ; et al.
Nucl.Phys.B 25 (1971) 510-518, 1971.
Inspire Record 68819 DOI 10.17182/hepdata.33806

None

4 data tables
Table 1

No description provided.

Table 2

No description provided.

Table 3

No description provided.

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Determination of the proton proton elastic cross-section at 30-GeV center-of-mass energy

Holder, M. ; Radermacher, E. ; Staude, A. ; et al.
Phys.Lett.B 35 (1971) 361-364, 1971.
Inspire Record 69227 DOI 10.17182/hepdata.28484

The absolute luminosity of the CERN Intersecting Storage Rings has been determined by the Van der Meer method. Combining the measurement with small angle proton-proton elastic events, we find σ elastic = (6.8±0.6)mb.

1 data table
Table 1

No description provided.


Proton proton total cross-sections between 179 and 555 mev

Schwaller, P. ; Pepin, M. ; Measday, David F. ; et al.
Phys.Lett.B 35 (1971) 243-246, 1971.
Inspire Record 69250 DOI 10.17182/hepdata.28479

Proton-proton total cross-sections have been measured at nine different energies between 179 and 555 MeV (607 and 1162 MeV/ c ) with a typical accuracy of 0.9%. The accuracy is limited by a poor knowledge of the Coulomb-nuclear interference region in elastic scattering.

1 data table
Table 1

No description provided.


Measurement of the polarization parameter in k+ p elastic scattering at 1.60, 1.80, 2.11 and 2.31 gev/c

Barnett, B.A. ; Laasanen, A.T. ; Steinberg, P.H. ; et al.
Phys.Lett.B 34 (1971) 655-658, 1971.
Inspire Record 69281 DOI 10.17182/hepdata.28513

The polarization parameter for K + p elastic scattering has been measured at 1.60, 1.80, 2.11 and 3.31 GeV/ c incident momenta over the entire angular range with an emphasis on the backward region. The results in the extreme backward region appear to be small and consistent with zero.

1 data table
Table 1

No description provided.


Backward rho+ production in pi+ p reactions at 5.2 gev/c

Carlson, P.J. ; Fleury, P. ; Lundby, A. ; et al.
Phys.Lett.B 33 (1970) 502-504, 1970.
Inspire Record 69380 DOI 10.17182/hepdata.28538

Using wire spark chambers we have observed the backward production of ϱ + mesons in the reaction π + p → p (missing mass) at 5.2 GeV/ c . In the four-momentum interval −0.80 < u < −0.006 (GeV/ c ) 2 the angular distribution shows a backward peak. In contrast to backward π + p elastic scattering, there is no dip in the angular distribution at u ≈ −0.15 (GeV/ c ) 2 . The ϱ + decay is found to be compatible with isotropy.

1 data table
Table 1

No description provided.


Evidence for b(1220) production in an analysis of the reaction k- d ---> p(s) lambda pi+ pi- pi- pi0 at 3 gev/c

The SABRE collaboration Hoogland, W. ; Kluyver, J.C. ; De Vries, T. ; et al.
Phys.Lett.B 33 (1970) 631-634, 1970.
Inspire Record 69351 DOI 10.17182/hepdata.28535

In an analysis of the reaction K − n →Λ4π at 3 GeV c we find evidence for the production of the B(1220) resonance, mainly decaying in ωπ. For the mass and width we find (1236 ± 15) MeV c 2 and (132±20) MeV c 2 respectively. The cross section for the reaction K − n→ Λ +B(1220) is found to be (102±26) μ b.

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.


Elastic scattering of positive pions on polarized protons between 0.82 and 2.74 gev/c

Albrow, M.G. ; Andersson-Almehed, S. ; Bosnjakovic, B. ; et al.
Nucl.Phys.B 25 (1970) 9-48, 1971.
Inspire Record 68844 DOI 10.17182/hepdata.7102

Polarization and differential cross-section data for elastic scattering of positive pions on protons between 0.82 and 2.74 GeV/ c are presented. A dip in the polarization, at constant u ≈ −0.65 GeV 2 , is observed. The data are compared with published phase-shift analyses.

96 data tables
Table 1

No description provided.

Table 2

No description provided.

Table 3

No description provided.

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