DIFFERENTIAL CROSS-SECTION OF THE REACTION pi- p ---> eta0 n AT MOMENTA OF 3.3-GeV/c AND 4.75-GeV/c

Arkhipov, V.V. ; Astvatsaturov, R.G. ; Ivanov, V.I. ; et al.
JINR-E1-11596, 1978.
Inspire Record 131557 DOI 10.17182/hepdata.43766

None

1 data table

THE DATA POINTS AT -T = 0.40 AND 0.60 GEV**2 WERE OBTAINED FROM THE PAPER BY J. P. DE BRION ET AL., NP B32, 557 (1971). THESE DATA OF O. GUISAN ET AL., PL 18, 200 (1965) ARE USED TO DETERMINE THE ABSOLUTE NORMALIZATION.


A Study of A2 and $g$ Resonance Production in $\pi^- p \to K^- K^0 p$

Martin, Alan D. ; Ozmutlu, E.N. ; Baldi, R. ; et al.
Nucl.Phys.B 140 (1978) 158-178, 1978.
Inspire Record 129933 DOI 10.17182/hepdata.35032

We present the results and the analysis of a high-statistics experiment to study A 2 and g production in the reaction π − p→K − K S 0 p at 10 GeV/ c . In each resonance region we perform a moment analysis of the data, and from the moments we determine the production amplitudes as a function of t . We find A 2 production proceeds dominantly by natural-parity (pomeron and f) exchange. We compare A 2 and diffractive K ∗ (1420) production. We find g production proceeds by π and ω exchanges; we determine the g → K K branching ratio.

2 data tables

No description provided.

No description provided.


Observation of a Spin 4, Isospin = 1, Meson Resonance

Baldi, R. ; Bohringer, T. ; Dorsaz, P.A. ; et al.
Phys.Lett.B 74 (1978) 413-416, 1978.
Inspire Record 129507 DOI 10.17182/hepdata.27458

We present the observation of a J P = 4 + , I G = 1 − state in the reaction π − p → K S 0 K − p at 10 GeV/ c measured with a non-magnetic spectrometer at the CERN proton synchrotron (PS). A spherical harmonics moments analysis of the K S 0 K − system shows a signal at ∼ 1900 MeV in the 〈 Y 7 0 〉 and 〈 Y 8 0 〉 moments, indicative of a spin 4.

1 data table

No description provided.


A Study of Isospin = 1 Meson States Using 10-{GeV}/$c K^- K^0$ Production Data

Martin, Alan D. ; Ozmutlu, E.N. ; Baldi, R. ; et al.
Phys.Lett.B 74 (1978) 417-421, 1978.
Inspire Record 129502 DOI 10.17182/hepdata.27459

We perform an amplitude analysis of 10 GeV/ c π − p → K − K S 0 p data as a function of K − K 0 mass from threshold up to 2 GeV. We find that the A 2 and g resonances are produced dominantly by natural and unnatural parity exchange, respectively, and we determine their resonance parameters. We present further evidence for the I = 1, 4 + state A 2 ∗ (1900), in particular by isolating interference effects. The structure of S-wave K − K 0 production suggests an I = 1, 0 + state just below 1300 MeV of width about 250 MeV.

1 data table

CROSS SECTIONS FROM FITTING MASS SPECTRUM. THE RESONANT AMPLITUDE CONTRIBUTIONS ALSO GIVEN IN PAPER.


Polarization Measurement of the $\Sigma^+$ Produced in the Line Reversed Reactions $\pi^+ p \to K^+ \Sigma^+$ and $K^- p \to \pi^- \Sigma^+$ at 7-{GeV}/$c$ and 11.6-{GeV}/$c$

Baker, P.A. ; Chima, J.S. ; Dornan, P.J. ; et al.
Phys.Rev.Lett. 40 (1978) 678, 1978.
Inspire Record 129108 DOI 10.17182/hepdata.20914

The polarization of the Σ+ has been measured for the line-reversed reactions π+p→K+Σ+ and K−p→π−Σ+ at 7 and 11.6 GeV/c using the SLAC Hybrid Facility. Since the Σ+ decay is observed in the bubble chamber, the trigger of the flash lamps on a fast K+(π−) did not bias the polarization measurements. We find that the Σ+ polarizations from the two reactions have opposite signs but similar magnitudes and are in much better agreement with the predictions of weak exchange degeneracy than previous lower-energy comparisons.

1 data table

No description provided.


Measurement of the Line Reversed Reactions anti-p p --> pi- rho- and pi- p --> p rho- at 6-GeV/c

Green, D.R. ; Edelstein, R.M. ; Halpern, H.J. ; et al.
Phys.Rev.Lett. 39 (1977) 1243-1246, 1977.
Inspire Record 126174 DOI 10.17182/hepdata.21005

Differential cross sections and density-matrix elements in ρ− decay have been measured at 6 GeV/c for p¯p→π+ρ− and its line-reversed partner π−p→pρ− in the range tmin>t>−1.5 (GeV/c)2. The reactions satisfy line-reversal symmetry and the ρ− decay is consistent with isotropy for −t≲0.5 (GeV/c)2. For −t≳0.5 (GeV/c)2, the differential cross sections show a weaker t dependence, and the decays become anisotropic.

2 data tables

No description provided.

FROM ROUGHLY EQUAL NUMBERS OF RHO- EVENTS AND BACKGROUND (CONSISTENT WITH ISOTROPY FOR BOTH REACTIONS).


Amplitude and Natural Parity Exchange Analysis of K+- p --> (K pi)+- p Data at 10-GeV/c

Martin, Alan D. ; Shimada, T. ; Baldi, R. ; et al.
Nucl.Phys.B 134 (1978) 392-412, 1978.
Inspire Record 122126 DOI 10.17182/hepdata.35128

High statistics data for the reactions K ± p → K S 0 π ± p at 10 GeV/ c are analysed. The K ∗ (1 − ), K ∗ (2 + ), and K ∗ (3 − ) resonance parameters and production cross sections are calculated. The Kπ production amplitudes are determined as a function of t and the produced Kπ mass. Isoscalar natural-parity-exchange (NPE) is dominant. The t dependence of the K ± NPE amplitudes have a cross-over at t = −0.3 (GeV/ c ) 2 for both K ∗ (890) and K ∗ (1420) production, being more pronounced for the K ∗ (1420). Natural-parity-exchange interference effects are isolated. The NPE amplitudes are decomposed into pomeron-, f-, and ω-exchange contributions. S-wave Kπ production is found to be consistent with the Kπ partial-wave analyses of charge-exchange reactions.

2 data tables

CORRECTED FOR BACKGROUND, BREIT-WIGNER TAILS AND T-ACCEPTANCE. SYSTEMATIC ERROR INCLUDED.

DATA FOR K PI PRODUCTION AND ANGULAR DISTRIBUTIONS ARE IN THE PRECEDING PAPER, R. BALDI ET AL., NP B134, 365 (1978).


Systematic Study of K pi Production in the Reaction K+- p --> K0(s) pi+- p: Technique and Measurements at 10-GeV/c

Baldi, R. ; Bohringer, T. ; Dorsaz, P.A. ; et al.
Nucl.Phys.B 134 (1978) 365-391, 1978.
Inspire Record 122145 DOI 10.17182/hepdata.8292

A two-arm spectrometer for simple event topologies is described. Its main characteristics are: (i) large solid-angle acceptance for the forward emitted particles, owing to the absence of magnetic-momentum analysis; (ii) high-resolution time-of-flight measurement of the recoil proton, in the momentum-transfer range 0.05 < | t | < 1 (GeV/ c ) 2 ; (iii) high data-taking rate and on-line pattern recognition.

6 data tables

No description provided.

No description provided.

K*(892)+ REGION.

More…

Comparison of the Line Reversed Channels anti-p p --> pi- pi+ and pi+ p --> p pi+ at 6-GeV/c

Stein, N.A. ; Edelstein, R.M. ; Green, D.R. ; et al.
Phys.Rev.Lett. 39 (1977) 378-381, 1977.
Inspire Record 124936 DOI 10.17182/hepdata.20964

Differential cross sections have been measured for p¯p→π−π+ (1) and its line-reversed partner π+p→pπ+ (2) in the range tmin>t>−1.5 (GeV/c)2 at 6 GeV/c. Clear structure is seen in the differential cross section for Reaction (1) at t∼−0.4 (GeV/c)2. However, this feature is quite different from the striking dip seen in (2) at t∼−0.15 (GeV/c)2, indicating a failure of line reversal and disagreement with simple Regge models.

2 data tables

No description provided.

No description provided.


The Differential Cross-Section of the Reaction pi- p --> eta0 n at a Momentum of 3.3-GeV/c

Astvatsaturov, R.G. ; Arkhipov, V.V. ; Boitsova, L.S. ; et al.
Sov.J.Nucl.Phys. 27 (1978) 216, 1978.
Inspire Record 120289 DOI 10.17182/hepdata.19025

None

1 data table

No description provided.