HEPData Search

Using the Mark-J detector at the high-energy e+e− collider PETRA, we compare the data from hadron production with the complete second-order QCD calculation over the energy region 22 to 46.78 GeV. We determine the QCD parameter Λ=100±30−45+60 MeV which yields the strong-coupling constant αs=0.12±0.02 for s=44 GeV.

2 data tables

Table 1

No description provided.

Table 2

Axis error includes +- 0.0/0.0 contribution (DUE TO FRAGMENTATION MODEL).

The $K^0 / \pi^-$ Ratio and Strangeness Suppression in Neutrino $p$ and Anti-neutrino $p$ Charged Current Interactions

The Birmingham-Bonn-CERN-London-Munich-Oxford collaboration Jones, G.T. ; Kennedy, B.W. ; O'Neale, S.W. ; et al.

Z.Phys.C 27 (1985) 43, 1985.

Inspire Record 205778 DOI 10.17182/hepdata.16066

Neutral kaon to negative pion production ratios fromvp and$\bar vp$ charged current interactions in BEBC are presented and compared with LUND fragmentation model predictions. Good agreement is obtained with a strangeness suppression factor λ=0.203±0.014(stat)±0.010(sys). No evidence is seen for an energy dependence of λ in our kinematic region.

2 data tables

Table 1

No description provided.

Table 2

No description provided.

A Measurement of $\bar{p} p$ and $p p$ Elastic Scattering at {ISR} Energies

The AMES-BOLOGNA-CERN-DORTMUND-HEIDELBERG-WARSAW collaboration Breakstone, A. ; Campanini, R. ; Crawley, H.B. ; et al.

Nucl.Phys.B 248 (1984) 253-260, 1984.

Inspire Record 204422 DOI 10.17182/hepdata.33837

We have measured the differential cross section for pp and p̄p elastic scattering at √ s = 31, 53 and 62 GeV in the interval 0.05 < | t | < 0.85 GeV 2 at the CERN ISR using the Split Field Magnet detector. At 53 and 62 GeV, for 0.17 < | t | < 0.85 GeV 2 both pp and p̄p data show simple exponential behaviour in t ; at √ s = 31 GeV the data for 0.05 < | t | < 0.85 GeV 2 are consistent with a change in slope near | t | = 0.15 GeV 2 .

5 data tables

Table 1

ERRORS CONTAIN BOTH STATISTICAL AND T-DEPENDENT SYSYEMATIC ERRORS.

Table 2

No description provided.

Table 3

LOCAL SLOPE PARAMETERS BASED ON QUADRATIC EXPONENTIAL FIT.

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Study of Transverse Momenta of Charged Hadrons Produced in Neutrino $p$ and Anti-neutrino $p$ Charged Current Interactions

The Birmingham-CERN-London-Munich-Oxford collaboration Jones, G.T. ; Kennedy, B.W. ; Middleton, R.P. ; et al.

Z.Phys.C 25 (1984) 121, 1984.

Inspire Record 201590 DOI 10.17182/hepdata.16211

Data from a neutrino and antineutrino hydrogen experiment with BEBC are used to investigate transverse properties of the produced charged hadrons. Measurements are presented on average transverse momenta of charged pions as functions of Feynman-x and the hadronic mass, on the transverse momentum flow within an event and on jet-related quantities. The main features of the data are well described by the LUND model. The data favour a version of the model in which soft gluon effects are included and the primordial transverse momentum of the quarks in the proton is small. Effects from 1st order QCD (hard gluon emission) are negligible.

6 data tables

Table 1

No description provided.

Table 2

No description provided.

Table 3

No description provided.

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Multiplicity, Momentum and Angular Characteristics of $\pi^-$ Mesons for $p$ C, $d$ C, $\alpha$ C and C C Interactions at 4.2-{GeV}/$c$ Per Nucleon

The Alma Ata-Baku-Belgrade-Bucharest-Dubna-Kishinev-Leipzig- Moscow-Prague-Samarkand-Sofiya-Tashkent-Tbilisi-Ulan Bator-Varna collaboration Agakishiev, G.N. ; Akhababian, N. ; Armutliisky, D. ; et al.

Z.Phys.C 27 (1985) 177, 1984.

Inspire Record 203342 DOI 10.17182/hepdata.1999

Light ion collisions with carbon target at 4.2 GeV/c/N are studied. Pion multiplicity distributions, momentum and angular spectra are analysed. These data are described in terms of models assuming independent interactions of nucleons from the projectile nucleus with the target.

18 data tables

Table 1

No description provided.

Table 2

No description provided.

Table 3

No description provided.

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Search for New Particles in $e^+ e^-$ Annihilation From 39.79-{GeV} to 45.52-{GeV}

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

Phys.Rev.Lett. 53 (1984) 134, 1984.

Inspire Record 199819 DOI 10.17182/hepdata.20429

We have searched for resonances in the reaction e+e−→hadrons, γγ, μμ, and ee, in the energy range 39.79<s<45.52 GeV, using the Mark J detector at PETRA. We obtain stringent upper limits on the production of toponium and particles postulated to explain Z0→leptonpair+γ events observed at the CERN p―p collider. We also set limits on the mass and coupling constant of excited electrons.

1 data table

Table 1

No description provided.

THE MULTIPLICITY OF THE SECONDARY CHARGE PARTICLES IN INELASTIC INTERACTIONS OF DEUTERIUM AND NEUTRONS WITH TANTALUM AND CARBON NUCLEI AT 1.7-GeV/c PER NUCLEON

Bekmirzaev, R.N. ; Gasparian, A.P. ; Grishin, V.G. ; et al.

Yad.Fiz. 40 (1984) 1477-1482, 1984.

Inspire Record 201522 DOI 10.17182/hepdata.39016

None

2 data tables

Table 1

PROPANE IS DESIGNATED AS 'NUCLEUS'.

Table 2

PROPANE DESIGNATED 'NUCLEUS'.

PRODUCTION OF PROTONS, DEUTERONS AND TRITIUM NUCLEI UNDER THE ANGLE OF 162-DEGREES IN INCLUSIVE REACTIONS ON NUCLEI INDUCED BY PI- MESONS WITH THE MOMENTA FROM 1.5-GEV/C UP TO 6.0-GEV/C

Burgov, N.A. ; Vlasov, M.K. ; Vorobev, L.S. ; et al.

Sov.J.Nucl.Phys. 38 (1983) 597-600, 1983.

Inspire Record 200176 DOI 10.17182/hepdata.17716

None

3 data tables

Table 1

No description provided.

Table 2

No description provided.

Table 3

No description provided.

rivet Analysis
A Summary of Recent Experimental Results From Mark-$J$: High-energy $e^+ e^-$ Collisions at {PETRA}

The Mark-J collaboration Adeva, B. ; Barber, D.P. ; Becker, U. ; et al.

Phys.Rept. 109 (1984) 131, 1984.

Inspire Record 196567 DOI 10.17182/hepdata.30997

None

6 data tables

Table 1

DATA ARE CORRECTED FOR TWO-PHOTON AND TAU PRODUCTION EFFECTS, ACCEPTANCE AND QED RADIATIVE EFFECTS UP TO ORDER ALPHA**3. THERE IS ALSO A 6 PCT NORMALISATION ERROR NOT INCLUDED. THE OVERALL AVERAGE VALUE OF R FROM THIS DATA IS 3.88 +- 0.04 +- 0.22.

Table 2

No description provided.

Table 3

SEE PRL 55, 665 FOR MOST RECENT VALUES OF THE MU+ MU- CROSS SECTIONS.

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CM Energies (GeV)

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MEASUREMENT OF TOTAL INELASTIC CROSS-SECTIONS OF THE INTERACTION OF PROTONS AND pi+ MESONS ON NUCLEI IN THE MOMENTUM RANGE FROM 1.35-GeV/c TO 3.75-GeV/c

A Measurement of Strong Coupling Constant $\alpha_s$ to Second Order for 14-{GeV} $\le \sqrt{s} \le$ 46.78-{GeV}

The $K^0 / \pi^-$ Ratio and Strangeness Suppression in Neutrino $p$ and Anti-neutrino $p$ Charged Current Interactions

A Measurement of $\bar{p} p$ and $p p$ Elastic Scattering at {ISR} Energies

Study of Transverse Momenta of Charged Hadrons Produced in Neutrino $p$ and Anti-neutrino $p$ Charged Current Interactions

Multiplicity, Momentum and Angular Characteristics of $\pi^-$ Mesons for $p$ C, $d$ C, $\alpha$ C and C C Interactions at 4.2-{GeV}/$c$ Per Nucleon

Search for New Particles in $e^+ e^-$ Annihilation From 39.79-{GeV} to 45.52-{GeV}

THE MULTIPLICITY OF THE SECONDARY CHARGE PARTICLES IN INELASTIC INTERACTIONS OF DEUTERIUM AND NEUTRONS WITH TANTALUM AND CARBON NUCLEI AT 1.7-GeV/c PER NUCLEON

PRODUCTION OF PROTONS, DEUTERONS AND TRITIUM NUCLEI UNDER THE ANGLE OF 162-DEGREES IN INCLUSIVE REACTIONS ON NUCLEI INDUCED BY PI- MESONS WITH THE MOMENTA FROM 1.5-GEV/C UP TO 6.0-GEV/C

rivet Analysis
A Summary of Recent Experimental Results From Mark-$J$: High-energy $e^+ e^-$ Collisions at {PETRA}