Albajar, C.
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Search for narrow structure in proton‐antiproton annihilation cross sections from 1900 to 1960 MeV

Lowenstein, D.I. ; Pealsee, D.C. ; Miller, R.J. ; et al.
Phys.Lett.B 158 (1985) 505-510, 1985.
Inspire Record 221435 DOI 10.17182/hepdata.30389

The p̄p annihilation cross section has been measured with good resolution (∼2 MeV rms) in the mass range 1900–1960 MeV. No narrow structures are seen, the 90% confidence level upper limit being 8–12 mb‐MeV for the integrated area of a resonance in this mass range. However, we do not rule out a very narrow bump‐dip structure seen in an earlier experiment in the 1935–1941 MeV mass interval. The data also do not support the existence of a broad structure previously reported at 1937 MeV.

1 data table
Table 1

Fit of form A + B/D gives A = 8.5 +- 2.5mb and B = 40.7 +- 1.3mb in the mass range 1900 to 1960 MeV.


CHARGED PARTICLE PRODUCTION ON C-12 BY INTERMEDIATE-ENERGY NEUTRONS

Franz, J. ; Rossle, E. ; Sauerwein, C. ; et al.
Phys.Lett.B 153 (1985) 382-385, 1985.
Inspire Record 217242 DOI 10.17182/hepdata.30416

Energy spectra of protons, deuterons and tritons produced on 12 C by 545 MeV neutrons have been measured at 7 angles between 73° and 165°. The slopes of the invariant cross sections and absolute yields are compared to corresponding proton induced reactions at similar energies and angles.

1 data table
Table 1

No description provided.


FRAGMENTATION INTO STRANGE PARTICLES IN HIGH-ENERGY NEUTRINO P, neutrino N, ANTI-NEUTRINO P AND ANTI-NEUTRINO N INTERACTIONS

The AMSTERDAM-BERGEN-BOLOGNA-PADUA-PISA-SACLAY-TURIN collaboration Allasia, D. ; Angelini, C. ; Baldini, A. ; et al.
Phys.Lett.B 154 (1985) 231-235, 1985.
Inspire Record 218756 DOI 10.17182/hepdata.30415

The fragmentation of the hadronic system into Λ, Σ(1385), K ) and K ∗ (892) in deep-inelastic charged-current interactions of high energy neutrinos and antineutrinos with proton and neutron is analyzed. The results obtained for the production of these particles from the various initial states are compared with each other and with the predictions of the Lund fragmentation model. This comparison shows that a spectator diquark does not fragment as a whole in a fraction of the interactions. The role of the sea quarks in the baryon formation process is underlined. Strange vector and pseudoscalar mesons are likely to be produced at similar rates.

3 data tables
Table 1

No description provided.

Table 2

SIG(C=LAMBDA) denotes the inclusive LAMBDA production in the same reaction.

Table 3

SIG(C=KS) denotes the inclusive KS production in the same reaction.


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.


MEASUREMENT OF K(LL) AND K(NN) IN P (polarized) D ----> N (polarized) P P AT 500-MEV, 650-MEV AND 800-MEV

Chalmers, J.S. ; Ditzler, W.R. ; Shima, T. ; et al.
Phys.Lett.B 153 (1985) 235-239, 1985.
Inspire Record 217080 DOI 10.17182/hepdata.30426

Measurements of the spin transfer parameters, K NN and K LL , at 500, 650 and 800 MeV are presented for the reaction p d → n pp at 0°. The data are useful input to the NN data base and indicate that the quasi-free charge exchange (CEX) reaction us a useful mechanism for producing neutrons with at least 40% polarization at energies as low as 500 MeV.

1 data table
Table 1

QUASI-FREE NP ELASTIC SCATTERING.


Large Transverse Momentum $\pi^0$ Production in $\alpha \alpha d d$ and $p p$ Collisions at the {CERN} {ISR}

The BCMOR collaboration Angelis, A.L.S. ; Basini, G. ; Besch, H.J. ; et al.
Phys.Lett.B 185 (1987) 213-217, 1987.
Inspire Record 222768 DOI 10.17182/hepdata.30194

None

1 data table
Table 1

No description provided.


MEASUREMENT OF DECAY PARAMETERS AND POLARIZATION IN INCLUSIVE XI- PRODUCTION FROM K- P INTERACTIONS

Bensinger, J. ; Kirsch, L. ; Lomanno, F.D. ; et al.
Nucl.Phys.B 252 (1985) 561-577, 1985.
Inspire Record 216909 DOI 10.17182/hepdata.33790

We present a measurement of the polarization and decay asymmetry parameters of the Ξ − inclusively produced in the forward direction in K − p interactions at 5 GeV/ c . The Ξ − decay parameters have been determined to be α Ξ = −0.405 ± 0.029 and Φ Ξ = 14.7° ± 16.0° from a sample of 20 865 events. A linear rise of the Ξ − polarization has been seen with respect to the transverse momentum of the Ξ − , reaching a maximum of 49 ± 4% at P ⊥ ∼ 0.50 GeV/ c . The value of α Ξ is consistent with the world average prior to 1975, but below the value measured by two recent experiments.

1 data table
Table 1

No description provided.


Measurement of the Reaction $e^+ e^- \to \tau^+ \tau^-$ at $\sqrt{s}=29$-{GeV}

Gan, K.K. ; Beltrami, I. ; Bylsma, B.G. ; et al.
Phys.Lett.B 153 (1985) 116-120, 1985.
Inspire Record 212773 DOI 10.17182/hepdata.6571

The reaction e + e − → τ + τ − has been measured using the high resolution spectrometer at PEP. The angular distribution shows a forward-backward asymmetry of −(6.1±2.3±0.5)%, corresponding to an axial-vector coupling if g a τ g a e = 0.28 ±0.11± 0.03, in good agreement with the standard model of electroweak interactions. The measured cross section yields ifR ττ = 1.10± 0.03±0.04, consistent with QED and giving QED cutoff parameters of Λ + >92 GeV and Λ − >246 GeV at 95% C.L.

4 data tables
Table 1

Comparison of total tau pair cross section with O(alpha**3) QED prediction.

Table 2

Corrected for acceptance backgraound, and O(alpha**3) radiative effects.

Table 3

Forward-backward asymmetry based on fit to angular distributions.

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INCLUSIVE GAMMA AND PI0 PRODUCTION IN K- P INTERACTIONS AT 32-GEV/C. FRANCE-SOVIET UNION AND CERN-SOVIET UNION COLLABORATIONS

Minaenko, A.A. ; Bryukhanova, T.M. ; Kruglov, N.A. ; et al.
Z.Phys.C 26 (1984) 27-35, 1984.
Inspire Record 214989 DOI 10.17182/hepdata.2003

The inclusive production of γ's and πp0's inK−p-interactions at 32 GeV/c is studied. About 30.000 γ's coming from a Mirabelle bubble chamber experiment with a sensitivity of 6.5 ev/μb have been used for the analysis. Inclusive and topological cross sections of γ's are measured. The γ invariant differential distributions and their scaling properties are investigated. The inclusive cross section of πp0-production is determined and the πp0 invariant differential distributions are evaluated and compared to those of πp±.

7 data tables
Table 1

No description provided.

Table 2

THE CITED ERROR ON SIG( K- P --> GAMMA ANY ) TAKES INTO ACCOUNT THE UNCERTAINTIES IN THE CROSS SECTIONS CALCULATION PROCEDURE.

Table 3

No description provided.

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INCLUSIVE K0(S), LAMBDA AND anti-LAMBDA PRODUCTION IN 360-GeV/c p p INTERACTIONS USING THE EUROPEAN HYBRID SPECTROMETER

The EHS-RCBC collaboration Asai, M. ; Bugg, W.M. ; Bailly, J.L. ; et al.
IFVE-85-65, 1985.
Inspire Record 214009 DOI 10.17182/hepdata.10425

None

17 data tables
Table 1

Axis error includes +- 0.0/0.0 contribution (?////).

Table 2

Axis error includes +- 0.0/0.0 contribution (?////).

Table 3

Axis error includes +- 0.0/0.0 contribution (?////).

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