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Search for $D^*$- Production With a 16-{GeV}/$c \pi^-$ Beam

Chung, S.U. ; Etkin, A. ; Fernow, Richard C. ; et al.

Phys.Rev.Lett. 48 (1982) 785, 1982.

Inspire Record 170568 DOI 10.17182/hepdata.20594

A search for production of D*−'s using the decay chain D0π−, D0→K+π−, was carried out at the Brookhaven National Laboratory multiparticle spectrometer with a 16-GeV/c π− beam and a hydrogen target. At 95% confidence level the upper limits for the product of peripheral production cross section by branching ratio are 2.4 nb for inclusive D*− production and 1.3 nb for the exclusive channel π−p→D*−Λc.

1 data table

Table 1

UPPER LIMIT TO CROSS SECTIONS.

A Partial Wave Analysis of the ($K^+ K^- \pi^-$) System Produced in $\pi^- p \to K^+ K^- \pi^- p$ at 16-{GeV}/$c$

The Aachen-Bari-Bonn-CERN-Glasgow-Liverpool-Milan collaboration Armstrong, T.A. ; Baccari, B. ; Bonesini, M. ; et al.

Nucl.Phys.B 202 (1982) 1-20, 1982.

Inspire Record 169445 DOI 10.17182/hepdata.44589

The reaction π − p → K + K − π − p at 16 GeV/ c was studied in the CERN OMEGA spectrometer and a partial-wave analysis (PWA) of the low-mass (K + K − π − ) system (1.3–2.0 GeV) was performed. Only states in the unnatural spin-parity series produced by natural parity exchange are important and they approximately conserve t -channel helicity. The 1 + S K ∗ K wave dominates the low-mass (K + K − π − ) region. We observe an enhancement in 2 − P K ∗ K wave at a mass of 1.7 GeV, consistent with the decay of the A 3 resonance.

3 data tables

Table 1

TOTAL ACCEPTANCE CORRECTED CROSS SECTION.

Table 2

ACCEPTANCE CORRECTED.

Table 3

MOST IMPORTANT CONTRIBUTING STATES CORRECTED FOR ACCEPTANCE.

REACTION PI- P ---> PI- PI+ PI- P AT 8-GEV/C

Kitagaki, T. ; Tanaka, S. ; Yuta, H. ; et al.

Phys.Rev.D 26 (1982) 1554-1571, 1982.

Inspire Record 182973 DOI 10.17182/hepdata.23971

Results from a high-statistics experiment involving an exposure of the SLAC 82-in. hydrogen bubble chamber to a beam of 8-GeV/c π− yielding a final state of π−π+π−p are presented. Copious production of ρ, Δ++, and f is found. Considerable quasi-two-body production in which one particle decays to one of the above resonances is also observed. Some double-resonance production involving baryon and meson resonances is also seen. The production properties of ρ, Δ++, and f mesons are well described by a double-Regge model.

29 data tables

Table 1

TOPOLOGICAL CROSS SECTIONS. FIRST 2 PRONG VALUE CONTAINS ELASTIC. 0PRONG IS TAKEN FROM A SMALLER AND DIFFERENT PARTIAL SAMPLE.

Table 2

CROSS SECTION CALCULATED VIA THE OPTICAL THEOREM AS A CROSS CHECK.

Table 3

SPECIFIC CHANNEL CROSS SECTIONS.

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REACTION K+ P ---> K N PI PI AT 4.27-GeV/c INCIDENT MOMENTUM

Gelfand, N.M. ; Lasinski, B. ; Leary, P. ; et al.

Phys.Rev.D 26 (1982) 2973-2978, 1982.

Inspire Record 184512 DOI 10.17182/hepdata.23895

The cross sections for K+p interactions at a center-of-mass energy of 3 GeV (4.3 GeV/c incident momentum) have been determined for the K+pπ+π−, K0pπ+π0, and K0π+π+n final states. The shape of the differential cross section dσdt′ for the quasi-two-body final state K*0(890)+Δ++(1236) is not a single exponential. Characteristics of the low-mass Kππ and pππ enhancements are discussed.

2 data tables

Table 1

No description provided.

Table 2

DECAY MOMENTS OF THE K*0 AND DEL++.

MEASUREMENT OF THE POLARIZATION PARAMETER IN PROTON NEUTRON ELASTIC SCATTERING AT 1.30-GEV/C, 1.39-GEV/C, 1.59-GEV/C AND 1.82-GEV/C

Sakuda, M. ; Isagawa, S. ; Ishimoto, S. ; et al.

Phys.Rev.D 25 (1982) 2004-2007, 1982.

Inspire Record 181091 DOI 10.17182/hepdata.23974

The polarization parameters of the pn elastic scattering were measured at beam momenta between 1.30 and 1.82 GeV/c. The results are discussed in comparison with the partial-wave analysis of Hashimoto and Hoshizaki.

4 data tables

Table 1

ERRORS ARE STATISTICAL ONLY.

Table 2

ERRORS ARE STATISTICAL ONLY.

Table 3

ERRORS ARE STATISTICAL ONLY.

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SOME G (1700) DECAY MODES

Bugg, W.M. ; Condo, G.T. ; Handler, T. ; et al.

Phys.Rev.D 26 (1982) 2183, 1982.

Inspire Record 184846 DOI 10.17182/hepdata.23946

From a study of 8-GeV/c π−p interactions, the various two-pion and four-pion decay channels available to the g− meson have been investigated. Our results indicate that the dominant 4π decay modes involve intermediate ρ and ω production without significant A2 formation.

3 data tables

Table 1

No description provided.

Table 2

No description provided.

Table 3

No description provided.

ELASTIC SCATTERING AND PARTICLE PRODUCTION IN TWO PRONG PI- P INTERACTIONS AT 8-GEV/C

Kitagaki, T. ; Tanaka, S. ; Yuta, H. ; et al.

Phys.Rev.D 26 (1982) 1572-1587, 1982.

Inspire Record 182974 DOI 10.17182/hepdata.23945

Results of a high-statistics study of elastic scattering and meson resonances produced by π−p interactions at 8 GeV/c are presented. Large statistics and small systematic errors permit examination of the complete kinematic region. Total differential cross sections are given for ρ0,−, f0, g0,−, Δ±, Δ0, and N* resonances. Spin-density matrix elements and Legendre-polynomial moments are given for ρ, f, and Δ resonances. The results for ρ0 and f0 resonances are compared with the predictions of a Regge-pole-exchange model. Properties of the above resonances are compared and discussed. In particular, we present evidence that the ρ0 and f0 production mechanisms are similar. The similarity of the g0 t distribution to that of the ρ0 and f0 suggests a common production mechanism for all three resonances.

5 data tables

Table 1

No description provided.

Table 2

No description provided.

Table 3

SLOPE REFERS TO EXPONENTIAL FIT IN U.

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BACKWARD ELASTIC SCATTERING AND RHO- PRODUCTION IN PI- P COLLISIONS AT 10-GEV/C

The BARI-BONN-CERN-GLASGOW-LIVERPOOL-MILAN-VIENNA collaboration Ghidini, B. ; Lenti, V. ; Palano, A. ; et al.

Nucl.Phys.B 195 (1982) 12-28, 1982.

Inspire Record 177922 DOI 10.17182/hepdata.26084

The reactions π − p → p π − and π − p → p ϱ − ( ϱ − → π − π 0 ) at 10 GeV/ c with the proton in the forward direction in the c.m.s. are discussed on the basis of 953 elastic scattering events and 2240 events of the reaction π − p → p π − π 0 . The total backward cross sections are 0.52±0.10 and 1.52±0.28 μ b, respectively. In both cases the production mechanism is compatible with the dominance of the baryonic Δ δ Regge trajectory exchange. The ϱ − decay angular distributions are studied in the u -channel helicity frame and the spin density matrix elements are presented as functions of u .

5 data tables

Table 1

No description provided.

Table 2

DATA FROM PRIV COMM WITH B. GHIDINI.

Table 3

DATA FROM PRIV COMM WITH B. GHIDINI.

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rivet Analysis
DECAY OF B MESONS INTO CHARGED AND NEUTRAL KAONS

The CLEO collaboration Brody, A. ; Chen, A. ; Goldberg, M. ; et al.

Phys.Rev.Lett. 48 (1982) 1070-1074, 1982.

Inspire Record 180612 DOI 10.17182/hepdata.27749

Data on inclusive kaon production in e+e− annihilations at energies in the vicinity of the ϒ(4S) resonance are presented. A clear excess of kaons is observed on the ϒ(4S) compared to the continuum. Under the assumption that the ϒ(4S) decays into BB¯, a total of 3.38±0.34±0.68 kaons per ϒ(4S) decay is found. In the context of the standard B-decay model this leads to a value for (b→c)(b→all) of 1.09±0.33±0.13.

2 data tables

Table 1

No description provided.

Table 2

ACCEPTANCE CORRECTED MOMENTUM DISTRIBUTIONS FOR CONTINUUM AND UPSILON EVENTS WITH THE CONTINUUM SUBTRACTED.