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Investigation of Two Photon Final States in $e^+ e^-$ Annihilation at $\sqrt{s}=34$.2-{GeV}

The CELLO collaboration Behrend, H.J. ; Chen, C. ; Fenner, H. ; et al.

Phys.Lett.B 123 (1983) 127-132, 1983.

Inspire Record 182585 DOI 10.17182/hepdata.30780

Two photon final states in e + e − annihilation have been analyzed at CM energies around 34 GeV. Good agreement with QED is observed. Lower limits for the QED cutoff parameters of Λ + > 59 GeV and Λ - > 44 GeV are determined. A search for two photons with missing energy yields an upper limit for the production of neutral particles which decay into a photon and a non-interacting particle. Constraints on the mass and the coupling strength of supersymmetric photinos are discussed.

2 data tables

Table 1

Cross section for ABS(cos(theta)) <0.85.

Table 2

No description provided.

Determination of the Neutral to Charged Current Cross-section Ratio for Neutrino Interactions on Protons

The BEBC TST Neutrino collaboration Armenise, N. ; Calicchio, M. ; Erriquez, O. ; et al.

Phys.Lett.B 122 (1983) 448-454, 1983.

Inspire Record 182504 DOI 10.17182/hepdata.30812

About 2000 neutral induced interactions observed inside the hydrogen filled TST in BEBC have been analysed. The data were obtained from an exposure to the v μ wide band beam at the CERN SPS. A separation of these events into charged current, neutral current and neutral hadron induced interactions have been achieved using a multidimensional kinematic analysis. The neutral to charged current cross section ratio for v μ interactions on free protons has been determined avoiding the drastic cuts on the data inherent in previous experiments. The result R P v = 0.47 ± 0.04 is compatible with those measurements and the prediction of the standard SU (2) × U (1) model for sin 2 θ W = 0.18 ± 0.04.

1 data table

Table 1

No description provided.

Hadron and Hadron Pair Production at Large Transverse Momentum in $p \bar{p}$ and $p p$ Interactions at the {ISR}

The Axial Field Spectrometer collaboration Akesson, T. ; Albrow, M.G. ; Almehed, S. ; et al.

Phys.Lett.B 121 (1983) 439-444, 1983.

Inspire Record 182425 DOI 10.17182/hepdata.30813

We have measured the production of one and two large transverse momentum hadrons in p p and pp interactions in the range 2 < p T < 6 GeV/ c for the central rapidity region |y| < 0.9 at s = 63 and 31 GeV . No statistically significant difference between p p and pp collisions is observed. The results are in accordance with lowest order QCS perturbative calculations and rule out a large contribution of Constituent Interchange Model (CIM), di-quark of quark-fusion subprocesses in this kinematic range.

2 data tables

Table 1

No description provided.

Table 2

No description provided.

Charged Particle Multiplicity Distributions in Proton Anti-proton Collisions at 540-{GeV} Center-of-mass Energy

The UA1 collaboration Arnison, G. ; Astbury, A. ; Aubert, Bernard ; et al.

Phys.Lett.B 123 (1983) 108-114, 1983.

Inspire Record 182553 DOI 10.17182/hepdata.30779

Results on charged particle production in pp̄ collision at s 1 2 = 540 GeV are presented. The data were obtained at the CERN pp̄ collider using the UA1 detector, operated without magnetic field. The central particle density is 3.3 + - 0.2 per unit o pseudo-rapidity for non-diffractive events. KNO scaling of the multiplicity distributions withresults from ISR energies is observed.

6 data tables

Table 1

Pseudorapidity density distribution for all charged multiplicities corrected for acceptance and backgrounds by excluding NSD events. Data have been read from the plot.

Table 2

Table 3

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DIFFERENTIAL CROSS-SECTION OF eta PRODUCTION ON CARBON IN pi- BEAM AT 3.3-GeV/c

Arkhipov, V.V. ; Astvatsaturov, R.G. ; Knapik, E. ; et al.

Sov.J.Nucl.Phys. 38 (1983) 593, 1983.

Inspire Record 183551 DOI 10.17182/hepdata.39136

None

1 data table

Table 1

Inclusive $\phi$ Meson Production in $K^-$, $\bar{p}$ and $p$ Be Interactions at 100-{GeV}/$c$

The ACCMOR collaboration Daum, C. ; Hertzberger, L.O. ; Hoogland, W. ; et al.

Z.Phys.C 18 (1983) 1, 1983.

Inspire Record 183362 DOI 10.17182/hepdata.16360

Inclusive ϕ-meson production has been measured for 100 GeV/cK−,$\bar p$ andp incident on a Be target. Differential cross sectionsdσ/dxF anddσ/dp⊥2 are presented in the interval 0.075<xF<0.225 and 0<p⊥<1 GeV/c respectively. The shape of thedσ/dxF distributions agrees with predictions from a quark fusion model. Comparison with cross sections measured on a hydrogen target in the samexF andp⊥ range suggest a linearA-dependence fromA=1 toA=9.

1 data table

Table 1

No description provided.

rivet Analysis
Search for Top Quark and a Test of Models Without Top Quark at the Highest {PETRA} Energies

Adeva, B. ; Barber, D.P. ; Becker, U. ; et al.

Phys.Rev.Lett. 50 (1983) 799, 1983.

Inspire Record 182337 DOI 10.17182/hepdata.20549

With a PETRA energy scan in ≤30-MeV steps, the continuum production of open top quark up to 38.54 GeV is excluded. Over regions of energy scan from 29.90 to 38.63 GeV limits are set on the product of hadronic branching ratio and electronic width BhΓee for toponium to be less than 2.0 keV at the 95% confidence level. By a search for flavor-changing neutral currents in b decay, models without a top quark are excluded.

4 data tables

Table 1

MEASUREMENT OF R IN ENERGY SCAN FROM SQRT(S) = 29.9 TO 3.146 AND 33.0 TO 36.72.

Table 2

MEASUREMENT OF R IN THE RANGE SQRT(S) 37 TO 38.63 GEV.

Table 3

THRUST DISTRIBUTION FOR EVENTS IN THE RANGE SQRT(S) 37.94 TO 38.63 AND 38.54 TO 38.63.

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Resonance Production in Diffractive $\pi^- N \to K^0_s K^0_s \pi^- N^{\prime}$ at 200-GeV/c

Chen, T.Y. ; Jenkins, E.W. ; Johnson, K.J. ; et al.

Phys.Rev.D 28 (1983) 2304, 1983.

Inspire Record 182627 DOI 10.17182/hepdata.23787

The reaction π−N→KS0KS0π−N′ at 200 GeV/c has been observed with a sensitivity of 450±150 events/μb. The KS0KS0π− system exhibits substantial K*−(890)K0 production. Also produced are f0(1270)π−, f′(1515)π−, and K*−(1430)K0 final states. These resonances occur predominantly at threshold. The diffractive KS0KS0π− cross section is 3.4±1.1 μb. An enhancement near the A3−(1680) is observed in the KS0KS0π− invariant-mass distribution.

2 data tables

Table 1

No description provided.

Table 2

EVIDENCE FOR A3 MESON SEEN.

INCLUSIVE AND SEMIINCLUSIVE RAPIDITY DISTRIBUTIONS OF pi+- MESONS IN K- p INTERACTIONS AT 32-GeV/c

The Soviet-CERN collaboration Babintsev, V.V. ; Bogolyubsky, M.Yu. ; Bumazhnov, V.A. ; et al.

Sov.J.Nucl.Phys. 38 (1983) 567, 1983.

Inspire Record 189534 DOI 10.17182/hepdata.10706

None

31 data tables

Table 1

No description provided.

Table 2

No description provided.

Table 3

No description provided.

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PROTON PRODUCTION CROSS-SECTION WITH 70-MEV - 230-MEV ENERGIES IN P A ---> P X REACTIONS FOR 1-GEV/C - 9-GEV/C, PI+ A ---> P X FOR FOR 1-GEV/C - 6-GEV/C AND PI- A ---> P X FOR 1.4-GEV/C AND 5-GEV/C. (IN RUSSIAN)

Bayukov, Yu.D. ; Gavrilov, V.B. ; Goryainov, N.A. ; et al.

Moscow Inst. Theor. Exp. Phys. Gkae - ITEF-83-148 (83,REC.NOV.) 99p, 1983.

Inspire Record 196222 DOI 10.17182/hepdata.9995

None

131 data tables

Table 1

No description provided.

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No description provided.

Table 3

No description provided.

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Investigation of Two Photon Final States in $e^+ e^-$ Annihilation at $\sqrt{s}=34$.2-{GeV}

Determination of the Neutral to Charged Current Cross-section Ratio for Neutrino Interactions on Protons

Hadron and Hadron Pair Production at Large Transverse Momentum in $p \bar{p}$ and $p p$ Interactions at the {ISR}

Charged Particle Multiplicity Distributions in Proton Anti-proton Collisions at 540-{GeV} Center-of-mass Energy

DIFFERENTIAL CROSS-SECTION OF eta PRODUCTION ON CARBON IN pi- BEAM AT 3.3-GeV/c

Inclusive $\phi$ Meson Production in $K^-$, $\bar{p}$ and $p$ Be Interactions at 100-{GeV}/$c$

rivet Analysis
Search for Top Quark and a Test of Models Without Top Quark at the Highest {PETRA} Energies

Resonance Production in Diffractive $\pi^- N \to K^0_s K^0_s \pi^- N^{\prime}$ at 200-GeV/c

INCLUSIVE AND SEMIINCLUSIVE RAPIDITY DISTRIBUTIONS OF pi+- MESONS IN K- p INTERACTIONS AT 32-GeV/c

PROTON PRODUCTION CROSS-SECTION WITH 70-MEV - 230-MEV ENERGIES IN P A ---> P X REACTIONS FOR 1-GEV/C - 9-GEV/C, PI+ A ---> P X FOR FOR 1-GEV/C - 6-GEV/C AND PI- A ---> P X FOR 1.4-GEV/C AND 5-GEV/C. (IN RUSSIAN)