Abrams, G.S.
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Inclusive Baryon Production in e+ e- Annihilation

Piccolo, M. ; Peruzzi, I. ; Luke, D. ; et al.
Phys.Rev.Lett. 39 (1977) 1503, 1977.
Inspire Record 121395 DOI 10.17182/hepdata.20965

The inclusive production of antiprotons and Λ's in e+e− annihilation has been measured as a function of the c.m. energy in the range 3.7-7.6 GeV. We find that the baryon cross section has a behavior different from the total hadronic production. Our results show a rapid rise in the ratio σp¯σμμ between 4.4 and 5 GeV, consistent with what would be expected from charmed baryon production. Λ¯ production is 10-15% of p¯ production at all energies.

1 data table
Table 1

NOT INCLUDING SYSTEMATIC ERRORS.


Phi Meson Production in 3.75-GeV/c pi+ p Interactions

Gidal, G. ; Michael, W. ; Trilling, G. ; et al.
Phys.Rev.D 17 (1978) 1256, 1978.
Inspire Record 5868 DOI 10.17182/hepdata.31764

The production of φ mesions is studied in the reaction π+p→π+p K+K− and π+→π+p K0K¯0 at 3.75 GeV/c. A large isotropic component is seen in the production angular distribution for the reaction π+p→π+pφ. The cross sections for the φπ+p and φΔ++ final states are compared with the cross sections for ωπ+p and ωΔ++ at the same momentum.

3 data tables
Table 1

NORMALIZED TO THE CROSS SECTION FOR PI+ P --> PI+ P PI+ PI-.

Table 2

No description provided.

Table 3

No description provided.


Amplitude Analysis of the Reaction pi+ p --> rho0 Delta++ at 3.75-GeV/c

Gelfand, N. ; Dagan, S. ; Lissauer, D. ; et al.
Nucl.Phys.B 138 (1978) 365-386, 1978.
Inspire Record 135354 DOI 10.17182/hepdata.35047

The joint decay distribution statistical tensors for the reaction π + p→ ϱ 0 Δ ++ have been measured as a function of t at 3.75 GeV/ c . From this data the amplitude components of the reaction were extracted using both t -independent and t -independent methods. The magnitudes of the amplitudes obtained from both methods are found to agree and appear to be insensitive to the fitting methods. The phases are not well determined in the t -independent method. A comparison is made with a similar analysis done at 7.1 GeV/c.

3 data tables
Table 1

UNITS OF D(SIG)/DT ASSUMED TO BE MUB/GEV**2.

Table 2

No description provided.

Table 3

No description provided.


Measurement of the Transverse Spin Dependence of the p p Total Cross-Section in the 1-GeV/c-3-GeV/c Region

Biegert, E.K. ; Buchanan, J.A. ; Clement, J.M. ; et al.
Phys.Lett.B 73 (1978) 235-238, 1978.
Inspire Record 134224 DOI 10.17182/hepdata.27471

The pp total cross section difference between pure transverse spin states was measured in the laboratory momentum range 1–3 GeV/ c . Significant differences were found and these differences show striking energy dependence. This structure is in disagreement with the predictions of simple exchange models.

2 data tables
Table 1

No description provided.

Table 2

REVISED DATA (J. D. LESIKAR, PRIV COMM, 19 JUN 1981). NOW CORRECTED FOR COULOMB-NUCLEAR INTERFERENCE. IN ADDITION, THE LOWEST MOMENTUM DATA POINT IS NOW KNOWN TO BE IN ERROR.


rivet Analysis
Inclusive Production of $D$ Mesons in $e^+ e^-$ Annihilation at 7-{GeV}

Rapidis, P.A. ; Feldman, G.J. ; Abrams, G.S. ; et al.
Phys.Lett.B 84 (1979) 507-510, 1979.
Inspire Record 133123 DOI 10.17182/hepdata.27331

Inclusive momentum and energy spectra of neutral and charged D-mesons produced in e + e − annihilation at energies near 7 GeV are presented. The slope of the energy spectrum is similar to the charged pion spectrum at the same energy. The inclusive cross section σ(e + e − → D or D + anything) at 7 GeV is 4.8±1.3 nb.

4 data tables
Table 1

No description provided.

Table 2

No description provided.

Table 3

SCALING VARIABLE IS X(P=3,DEF=2*E(P=3)/SQRT(S)) > 0.54.

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PRODUCTION OF NEUTRAL STRANGE PARTICLES IN ANTI-NEUTRINO N INTERACTIONS CAUSED BY NEUTRAL CURRENTS

Ammosov, V.V. ; Asratian, A.E. ; Gapienko, V.A. ; et al.
JETP Lett. 39 (1984) 209-213, 1984.
Inspire Record 151098 DOI 10.17182/hepdata.2216

None

2 data tables
Table 1

No description provided.

Table 2

No description provided.


Experimental Tests of Quantum Chromodynamics in High $p_T$ Jet Production in 200-{GeV}/$c$ Hadron - Proton Collisions

Bromberg, C. ; Fox, G. ; Gomez, R. ; et al.
Phys.Rev.Lett. 43 (1979) 565, 1979.
Inspire Record 141467 DOI 10.17182/hepdata.52007

Data on inclusive jet production in the transverse-momentum (p⊥) range 0-8 GeV/c for 200-GeV/c p, π−, π+, K−, K+, and p¯ incident on a hydrogen target are presented. The jet cross section is fully corrected for losses and biases, and compared with the predictions of a model based on quantum chromodynamics. Both the absolute cross section and the inclusive charged-particle distributions inside and outside the jet are in qualitative agreement with the model.

8 data tables
Table 1

No description provided.

Table 2

No description provided.

Table 3

No description provided.

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Observation of Charmed Baryon Production in e+ e- Annihilation

Abrams, G.S. ; Alam, M.S. ; Blocker, C.A. ; et al.
Phys.Rev.Lett. 44 (1980) 10, 1980.
Inspire Record 142743 DOI 10.17182/hepdata.20754

A peak in the pK−π+ and p¯K+π− invariant-mass spectra at 2.285±0.006 GeV/c2 is observed, which is associated with the lowest-lying charmed baryon (Λc). A cross section times branching ratio of 0.037±0.012 nb at Ec.m.=5.2 GeV is measured with a substantial fraction of the events produced with an equal recoiling mass. New measurements of inclusive p and Λ cross sections are also presented, allowing an estimate of the branching ratio B(Λc→pK−π+)=0.022±0.010.

3 data tables
Table 1

THE TOTAL INCLUSIVE CHARMED LAMBDA CROSS SECTION IS DERIVED FROM THE OBSERVED PRODUCTION RATE VIA THE <P K- PI+> CHANNEL USING THE STEP IN INCLUSIVE PROTON PRODUCTION AT THE CHARMED-BARYON THRESHOLD AND REASONABLE ASSUMPTIONS. THE BRANCHING RATIO (LAMBDA/C+ --> P K- PI+) IS THEN 2.2 +- 1.0 PCT.

Table 2

ACTUALLY TWICE THE INCLUSIVE ANTI-PROTON CROSS SECTION (EACH BARYON PAIR IS COUNTED TWICE).

Table 3

EACH BARYON PAIR PRODUCED IS OF COURSE COUNTED TWICE IN THIS CROSS SECTION.


Measurement of High-energy Direct Photons in $\psi$ Decays

Abrams, G.S. ; Alam, M.S. ; Blocker, C.A. ; et al.
Phys.Rev.Lett. 44 (1980) 114, 1980.
Inspire Record 142835 DOI 10.17182/hepdata.20729

The inclusive γ and π0 momentum distributions at the ψ have been measured. Using these data and estimates of η production, it is found that (4.1 ± 0.8)% of ψ decays contain a direct photon with energy greater than 60% of the beam energy. The expected momentum distribution for direct photons calculated to lowest order in quantum chromodynamics is qualitatively different from that observed in the data.

1 data table
Table 1

INCLUSIVE PHOTON AND PI0 MOMENTUM DISTRIBUTION.


Measurement of the Parameters of the $\psi^{\prime\prime}$(3770) Resonance

Abrams, G.S. ; Alam, M.S. ; Blocker, C.A. ; et al.
Phys.Rev.D 21 (1980) 2716, 1980.
Inspire Record 142644 DOI 10.17182/hepdata.24185

We present a measurement of the cross section for hadron production by e+e− annihilation in the vicinity of the previously observed resonance near 3.77 GeV. The data are used to determine the parameters of the ψ(3770) resonance. The values found are: mass, 3764±5 MeV/c2, total width, 23.5±5 MeV, and partial width to electron pairs, 276±50 eV.

3 data tables
Table 1

THESE RESULTS ARE ALSO IN THE THESIS OF R. H. SCHINDLER, SLAC-219 (1979), THE RECORD OF WHICH CONTAINS THE TABULATED CROSS SECTIONS.

Table 2

BREIT-WIGNER RESONANCE PLUS BACKGROUND FIT TO RADIATIVELY CORRECTED DATA YIELDS RESONANCE MASS OF 3764 +- 5 MEV, TOTAL WIDTH OF 23.5 +- 5 MEV AND PARTIAL WIDTH TO ELECTRON PAIRS OF 276 +- 50 EV.

Table 3

PEAK CROSS SECTION FOR D MESON PAIR PRODUCTION AT PSI(3770) RESONANCE. J/PSI, PSI(3684) AND CONTINUUM BACKGROUND (R=2.5) SUBTRACTED.