HEPData Search

Inclusive ρ 0 production in neutrino-proton charged-current interactions is studied, using a sample of 7831 events obtained in BEBC filled with hydrogen and exposed to the CERN wideband neutrino beam. An average multiplicity of 0.14±0.02 ρ 0 per event is found, corresponding to a ratio 〈 ρ 0 〉/〈 π − 〉=0.13±0.02. The ρ 0 production characteristics are determined as functions of leptonic variables ( W , Q 2 , χ B ) and hadronic variables ( χ F , z , p t 2 ) and are found to be similar to those determined for hadron- and other lepton-induced reactions.

3 data tables

Table 1

No description provided.

Table 2

No description provided.

Table 3

No description provided.

High $p_T$ Hadron Production in Photon - Photon Collisions

The TASSO collaboration Brandelik, R. ; Braunschweig, W. ; Gather, K. ; et al.

Phys.Lett.B 107 (1981) 290-296, 1981.

Inspire Record 167417 DOI 10.17182/hepdata.31027

We have studied the properties of hadron production in photon-photon scattering with tagged photons at the e + e − storage ring PETRA. A tail in the p T distribution of particles consistent with p T −4 has been observed. We show that this tail cannot be due to the hadronic part of the photon. Selected events with high p T particles are found to be consistent with a two-jet structure as expected from a point-like coupling of the photons to quarks. The lowest-order cross section predicted for γγ → q q , σ = 3 Σ e q 4 · σ γγ → μμ , is approached from above by the data at large transverse momenta.

1 data table

Table 1

No description provided.

First Measurement of the Photon Structure Function F2

The PLUTO collaboration Berger, Christoph ; Genzel, H. ; Grigull, R. ; et al.

Phys.Lett.B 107 (1981) 168-172, 1981.

Inspire Record 167681 DOI 10.17182/hepdata.31043

Using data taken at PETRA we present results on deep inelastic electron photon scattering at momentum transfers 1 < Q 2 < 15 GeV 2 . The results are expressed in terms of the photon structure function F 2 and are compared with QCD predictions and “hadronic” models of the photon. The pointlike component of the photon is found to be dominant.

2 data tables

Table 1

Data read from graph.. Data for W < 3.5 in Berger et al. 1981, PL 99B,287 (<a href=http://durpdg.dur.ac.uk/scripts/reacsearch.csh/TESTREAC/red+1164> RED = 1164 </a>).

Table 2

PHOTON STRUCTURE FUNCTION. NUMERICAL VALUES OF DATA ON FIGURE SUPPLIED BY W. WAGNER.

ASYMMETRY OF THE REACTION gamma d ---> p n CROSS-SECTION WITH POLARIZED PHOTONS IN THE ENERGY REGION E (gamma) = 0.4-GeV - 0.7-GeV

Adamian, F.V. ; Arustamian, G.V. ; Galumian, P.I. ; et al.

EFI-505-48-81-YEREVAN, 1981.

Inspire Record 171117 DOI 10.17182/hepdata.18464

None

1 data table

Table 1

Axis error includes +- 10/10 contribution (ERROR IN VALUE OF PHOTON'S POLARIZATION).

Inclusive $\pi^0$ Production in 250-{GeV}/$c \pi^- p$ Interactions

Diamond, R.N. ; Hagopian, S. ; Hays, P.J. ; et al.

Phys.Rev.D 25 (1982) 41, 1982.

Inspire Record 11137 DOI 10.17182/hepdata.23973

Neutral-pion production in 250-GeV/c π−p interactions are studied using the Fermilab 15-ft bubble chamber. The mean number of neutral pions produced is 3.54±0.15 per inelastic collision and a fit to a linear dependence on the charged multiplicity gives 〈n0〉=1.30+0.56n−. The π0 transverse- and longitudinal-momentum distributions are obtained from the inclusive γ-ray data and compared with the distribution obtained from those π0's which have both decay γ rays converting in the bubble chamber.

1 data table

Table 1

PI0 MEAN MULTIPLICITY IS OBTAINED FROM SIG(PI0,BACKGROUND CORRECTED)=70.8+-8.3 MB. THE NON-CORRECTED BACKGROUD SIG(PI0)=75.7+-3.2 MB AND < PI0 >=3.54+-0.15.

Measurement of the Ratios of $\bar{\nu}_\mu n$ to $\bar{\nu}_\mu p$ Charged Current Cross-sections at High-energies

Allasia, D. ; Angelini, C. ; Baldo-Ceolin, M. ; et al.

Phys.Lett.B 107 (1981) 148-152, 1981.

Inspire Record 167732 DOI 10.17182/hepdata.39982

From the analysis of 5630 v υ and of 1372 v π charged current interactions, obtained in the BEBC bubble chamber filled with deuterium and exposed to the CERN wide band antineutrino beam, the ratios of cross section on neutron and photon targets have been measured and found to be R  σ ν)/σ v p = 0.51 ± 0.01 (±0.03) , and R  σ( ν n )/σ( v p ) = 22.2 ± 0.12 (±0.25) The dependence of these ratios on the x scaling variable shows, in a direct way, that the momentum distribution of the majority quark, u p ( x ) = d n ( x ), is broader than that of the minority quark, u n ( x ) = d p ( x ).

2 data tables

Table 1

No description provided.

Table 2

No description provided.

PROTON INCLUSIVE SPECTRA IN pi- C-12 INTERACTIONS AT 5-GeV/c

Bairamov, A.A. ; Budagov, Yu.A. ; Valkar, S. ; et al.

Yad.Fiz. 35 (1982) 1627-1629, 1982.

Inspire Record 168381 DOI 10.17182/hepdata.39117

None

1 data table

Table 1

No description provided.

Analysis of Fragmentation Functions of Narrow Band Neutrino and Anti-neutrino Interactions on an Isoscalar Target

The Aachen-Bonn-CERN-Democritos-London-Oxford-Saclay collaboration Deden, H. ; Fritze, P. ; Grassler, H. ; et al.

Nucl.Phys.B 198 (1982) 365-379, 1982.

Inspire Record 11149 DOI 10.17182/hepdata.34174

None

2 data tables

Table 1

No description provided.

Table 2

No description provided.

Inclusive Production of Lambdas and Anti-lambdas in $\gamma p$ Interactions for Photon Energies Between 25-{GeV} and 70-{GeV}

The Bonn-CERN-Ecole Poly-Glasgow-Lancaster-Manchester-Orsay-Paris-Rutherford-Sheffield collaboration Aston, D. ; Atkinson, M. ; Bailey, R. ; et al.

Nucl.Phys.B 195 (1982) 189-202, 1982.

Inspire Record 167734 DOI 10.17182/hepdata.34176

Results are presented on the inclusive photoproduction of λ and λ for incident photon energies between 25 and 70 GeV. The slope parameter of the p T 2 distribution is found to be 2.83±0.1 GeV −2 for λ and 3.28±0.25 GeV −2 for λ . The x F distributions, measured in the range −0.2 to 0.7, show that while λ are produced centrally, λ production extends to more negative values of x F ; the shapes show no energy dependence and are similar to those in pion-induced reactions. The polarization of the produced λ is less than 10%. The results are discussed in terms of vector dominance and quark fusion models.

4 data tables

Table 1

No description provided.

Table 2

No description provided.

Table 3

No description provided.

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MEASUREMENT OF THE POLARIZED TARGET ASYMMETRY ON gamma p ---> pi+ n IN THE THIRD RESONANCE REGION

Inclusive Production of $\rho^0$ in Neutrino $p$ Charged Current Interactions

High $p_T$ Hadron Production in Photon - Photon Collisions

First Measurement of the Photon Structure Function F2

ASYMMETRY OF THE REACTION gamma d ---> p n CROSS-SECTION WITH POLARIZED PHOTONS IN THE ENERGY REGION E (gamma) = 0.4-GeV - 0.7-GeV

Inclusive $\pi^0$ Production in 250-{GeV}/$c \pi^- p$ Interactions

Measurement of the Ratios of $\bar{\nu}_\mu n$ to $\bar{\nu}_\mu p$ Charged Current Cross-sections at High-energies

PROTON INCLUSIVE SPECTRA IN pi- C-12 INTERACTIONS AT 5-GeV/c

Analysis of Fragmentation Functions of Narrow Band Neutrino and Anti-neutrino Interactions on an Isoscalar Target

Inclusive Production of Lambdas and Anti-lambdas in $\gamma p$ Interactions for Photon Energies Between 25-{GeV} and 70-{GeV}