Hughes, C.M.
Pion-Proton Scattering
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$D \bar{D}$ Correlations in 360-{GeV}/$c \pi^- p$ Interactions

The NA27 & LEBC-EHS collaborations Aguilar-Benitez, M. ; Allison, W.W. ; Baland, J.F. ; et al.
Phys.Lett.B 164 (1985) 404-409, 1985.
Inspire Record 216598 DOI 10.17182/hepdata.49642

Charm-charm correlation properties are studied in detail for the first time using a sample of D D pairs produced in 360 GeV/ c π − p interactions. The data are compared with various models of charm production.

1 data table
Table 1

No description provided.


$D$ Meson Branching Ratios and Hadronic Charm Production Cross-sections

The LEBC-EHS collaboration Aguilar-Benitez, M. ; Allison, W.W.M. ; Bagnaia, P. ; et al.
Phys.Lett.B 135 (1984) 237-242, 1984.
Inspire Record 193696 DOI 10.17182/hepdata.30599

A determination of branching ratios for D meson decays into all charged particle final states is reported. The values obtained: (D ± → K ∓ π ± π ± /all D ± ) = (14 ± 6)% and ( D 0 /D 0 → K ± π ∓ π + π − /all D 0 /D 0 ) = (10 ± 4)%, are higher than those currently accepted. This result, if confirmed, implies a corresponding reduction in the accepted values for some total cross section measurements. Revised inclusive cross sections for D meson production in the forward hemisphere in π − p and pp interactions at 360 GeV/ c , are presented.

1 data table
Table 1

No description provided.


$\pi^+ p$ elastic scattering

Hughes, C.M. ;
PhD Thesis, Bristol U., 1972.
Inspire Record 1501542 DOI 10.17182/hepdata.76466

None

18 data tables
Table 1

No description provided.

Table 2

No description provided.

Table 3

No description provided.

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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.


A Search for F Production in 360-{GeV}/$c \pi^- p$ Interactions

The LEBC-EHS collaboration Aguilar-Benitez, M. ; Allison, W.W. ; Baland, J.F. ; et al.
Phys.Lett.B 156 (1985) 444-450, 1985.
Inspire Record 214934 DOI 10.17182/hepdata.30417

We present the results of a search for charm F mesons in 360 GeV/ c π − p interactions. Several methods have been used; all yield no evidence for the F and are interpreted as 90% confidence level cross section upper limits.

2 data tables
Table 1

D/S+- lifetime was assumed tau = 3.2*10**-13 s.

Table 2

D/S+- lifetime was assumed tau = 3.2*10**-13 s.


A Study of the Reaction $\pi^- p \to \phi \phi n$ at 16-{GeV}/$c$

The Aachen-Bari-Bonn-CERN-Glasgow-Liverpool-Milan collaboration Armstrong, T.A. ; Baccari, B. ; Booth, P.S.L. ; et al.
Nucl.Phys.B 196 (1982) 176-188, 1982.
Inspire Record 165251 DOI 10.17182/hepdata.34217

The reaction π − p → φφ n has been isolated at 16 GeV/ c and its cross section determined to be 40 ± 10 nb. The φφ mass spectrum shows a threshold enhancement between 2.1 and 2.5 GeV. A successful description of the angular content of the φφ system requires two interferingss J P = 2 + states.

2 data tables
Table 1

No description provided.

Table 2

SLOPE OF DIFFERENTIAL TP(P=3,P=2) DISTRIBUTION.


AN AMPLITUDE ANALYSIS OF THE K+ K- SYSTEM PRODUCED IN THE REACTION PI- P ---> K+ K- N AT 10-GEV/C

The BARI-BONN-CERN-GLASGOW-LIVERPOOL-MILAN-VIENNA collaboration Costa, G. ; Donald, R.A. ; Edwards, D.N. ; et al.
Nucl.Phys.B 175 (1980) 402-434, 1980.
Inspire Record 159739 DOI 10.17182/hepdata.34458

We present results on an amplitude analysis of the K + K − system produced in the reaction π − p→K + K − n from threshold up to 2.2 GeV. The branching ratios of f 0 and f' to K K have been determined. In the low mass region of the K K system the observation of an S-wave enhancement at 1.3 GeV and the interference of the f 0 -A 2 -f' mesons are studied. We observe a 3 − structure in the mass region of 1.7 GeV which is consistent with g 0 production. With this interpretation the branching ratio g→ K K has been determined. Evidence for a new structure in the J p = 2 + wave around 1.8 GeV with a width of ∼200 MeV is presented.

2 data tables
Table 1

HELICITY ZERO D-WAVE AMPLITUDE FITTED BY SUM OF BREIT-WIGNER RESONANCES. F 14 GIVES T-DEPENDENCE. ALSO EVIDENCE FOR 1.8 GEV STATE WITH 0.60 +- 0.13 MUB PRODUCTION CROSS SECTION.

Table 2

FROM HELICITY ZERO F-WAVE AMPLITUDE ASSUMING PREDOMINANTLY G(1680)0 PRODUCTION. F 16 GIVES T-DEPENDENCE.


Analysis of the Inclusive Reaction $\pi^- p \to K^*$ (890) X0 at 10-{GeV}/c

The Bari-Bonn-CERN-Daresbury-Glasgow-Liverpool-Milan-Vienna collaboration Di Gennaro, V. ; Evangelista, C. ; Ghidini, B. ; et al.
Nucl.Phys.B 173 (1980) 107-126, 1980.
Inspire Record 153000 DOI 10.17182/hepdata.34495

Experimental results on the reaction π − p → K ∗0 (890) X 0 at 10 GeV /c are presented. By using the K ∗0 polarization measurements, a detailed study of the production has been carried out as a function of the missing mass squared and of the four-momentum trasnfer squared to the K ∗0 . We found that: (a) K ∗0 production is dominated by natural parity exchange; (b) K ∗0 helicity-zero production dominates the unnatural parity exchange contribution and (c) the main features of the reaction are in agreement with the predictions of the finite mass sum rules.

4 data tables
Table 1

TO TAL (NATURAL+UNATURAL PARITY EXCHANGE) CROSS-SECTIONS.

Table 2

NATURAL PARITY EXCHANGE CROSS-SECTIONS.

Table 3

UNATURAL PARITY EXCHANGE CROSS-SECTIONS.

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Analyzing powers for pi- p elastic scattering at 279-MeV

Hofman, G.J. ; Craig, K. ; Pavan, M.M. ; et al.
Phys.Rev.C 68 (2003) 018202, 2003.
Inspire Record 628373 DOI 10.17182/hepdata.25270

Analyzing powers for π−p elastic scattering have been measured at TRIUMF using the CHAOS spectrometer and a spin-polarized target. These data were collected at a bombarding energy of Tπ=279MeV and cover an angular range of 53<~θc.m.π<~180°. There is good agreement between these data and the latest partial wave analysis from the VPI/GWU group.

1 data table
Table 1

Analysing power measurement.


Analyzing powers for the pi- p(pol.) --> pi0 n reaction across the Delta(1232) resonance.

Gaulard, C.V. ; Riedel, C.M. ; Comfort, Joseph R. ; et al.
Phys.Rev.C 60 (1999) 024604, 1999.
Inspire Record 483795 DOI 10.17182/hepdata.51678

High quality analyzing powers for the π−p→→π0n reaction have been obtained with a polarized proton target over a broad angular range at incident kinetic energies of 98.1, 138.8, 165.9, and 214.4 MeV. This experiment nearly doubled the existing πN single-charge-exchange database for energies ranging from 10 to 230 MeV, with 36 new analyzing powers. The Neutral Meson Spectrometer was used to detect the outgoing neutral pions. The data are well described by recent phase-shift analyses. When combined with high-precision and accurate cross section data at the same energies, the data can provide a good test of the degree of isospin breaking in the region of the Δ(1232) resonance. They will also be helpful for constraining the evaluation of the pion-nucleon σ term from the scattering amplitudes.

4 data tables
Table 1

First error is total uncertainty.

Table 2

First error is total uncertainty.

Table 3

First error is total uncertainty.

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