Combley, F.
European Muon
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A Comparison of the Energy Distributions of Hadrons Produced in Deep Inelastic Scattering of Muons on Hydrogen and Deuterium Targets

The European Muon collaboration Aubert, J.J. ; Bassompierre, G. ; Becks, K.H. ; et al.
Z.Phys.C 31 (1986) 175, 1986.
Inspire Record 227131 DOI 10.17182/hepdata.1817

The energy distribution of inclusive hadrons produced by 280 GeV muons on hydrogen and deuterium targets are compared. The sum of the scaled energy distributions of the positive and negative hadrons is found to be the same for the two targets. The difference of these distributions is observed to factorise inx andz and thez-dependence is found to be independent of the target type and have a form (1−z)2.1±0.2. The net charge of the hadronic jet is positive at highx even in the case when the scattering takes place on the neutron. These results are in good agreement with the expectations of the Quark Parton Model.

53 data tables
Table 1

No description provided.

Table 2

No description provided.

Table 3

No description provided.

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Forward Produced Protons and Anti-protons in Deep Inelastic Muon Proton Scattering

The European Muon collaboration Aubert, J.J. ; Bassompierre, G. ; Becks, K.H. ; et al.
Phys.Lett.B 103 (1981) 388, 1981.
Inspire Record 166178 DOI 10.17182/hepdata.31185

A significant rate of forward proton and antiproton production has been observed in 120 and 280 GeV muon-proton scattering. The z and p T 2 distributions are presented. The dependence of the normalized production cross section on the muon variables x and Q 2 is studied.

2 data tables
Table 1

No description provided.

Table 2

No description provided.


Evidence for Planar Events and a Forward Double Jet Structure in Deep Inelastic Muon Scattering

The European Muon collaboration Aubert, J.J. ; Bassompierre, G. ; Becks, K.H. ; et al.
Phys.Lett.B 100 (1981) 433-438, 1981.
Inspire Record 164536 DOI 10.17182/hepdata.31213

The final states of charged hadrons produced in 280 GeV μp scattering are analysed with respect to their planarity and jet structure. Distributions of p ⊥ 2 in and p ⊥ out 2 are presented. A two jet structure in the forward hemisphere is observed for events with high p ⊥ tracks are predicted by QCD models.

2 data tables
Table 1

PTIN**2 is the sum of the PTIN components squared.

Table 2

PTOUT**2 is the sum of the PTOUT components squared.


Measurement of the Proton Structure Function F(2) in Muon - Hydrogen Interactions at 120-GeV and 280-GeV

The European Muon collaboration Aubert, J.J. ; Bassompierre, G. ; Becks, K.H. ; et al.
Phys.Lett.B 105 (1981) 315-321, 1981.
Inspire Record 167336 DOI 10.17182/hepdata.31046

The proton structure function F 2 has been measured in the range 2.5 ⪕ Q 2 ⪕ 170 GeV 2 and 0.03 ⪕ x ⪕ 0.65 . Scaling violation is clearly seen in the data. Results of fits to leading-order QCD are presented, together with values of the scale-breaking parameter λ.

40 data tables
Table 1

No description provided.

Table 2

No description provided.

Table 3

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Measurements of the Nucleon Structure Functions F(2)N in Deep Inelastic Muon Scattering from Deuterium and Comparison with Those from Hydrogen and Iron

The European Muon collaboration Aubert, J.J. ; Bassompierre, G. ; Becks, K.H. ; et al.
Nucl.Phys.B 293 (1987) 740-786, 1987.
Inspire Record 245537 DOI 10.17182/hepdata.33529

None

12 data tables
Table 1

No description provided.

Table 2

No description provided.

Table 3

No description provided.

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HADRON PRODUCTION IN 200-GeV mu - COPPER AND mu - CARBON DEEP INELASTIC INTERACTIONS

The European Muon collaboration Arvidson, A. ; Aubert, J.J. ; Bassompierre, G. ; et al.
Nucl.Phys.B 246 (1984) 381-407, 1984.
Inspire Record 200802 DOI 10.17182/hepdata.33858

The measurements of the z and p T 2 distribution of hadrons produced in the interactions of 200 GeV muons with copper and carbon nuclei are shown in different x Bj and virtual photon energy intervals. Effects of the jet scattering are seen at the lowest virtual photon energies while for energies above 70 GeV there is no evidence of these effects. Comparison with a theoretical model indicates that at high jet energies the parton fragmentation distance is greater than the nuclear radius and that the parton absorption cross section is less than 10 mb.

2 data tables
Table 1

No description provided.

Table 2

No description provided.


A detailed study of the nucleon structure functions in deep elastic muon scattering in iron

The European Muon collaboration Aubert, J.J. ; Bassompierre, G. ; Becks, K.H. ; et al.
Nucl.Phys.B 272 (1986) 158-192, 1986.
Inspire Record 227060 DOI 10.17182/hepdata.33614

None

45 data tables
Table 1

No description provided.

Table 2

No description provided.

Table 3

No description provided.

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Evidence for Anomalous Prompt Photons in Deep Inelastic Muon Scattering at 200-{GeV}

The European Muon collaboration Aubert, J.J. ; Bassompierre, G. ; Becks, K.H. ; et al.
Phys.Lett.B 218 (1989) 248-256, 1989.
Inspire Record 261250 DOI 10.17182/hepdata.29855

The inclusive yield of photons has been measured from deep inelastic interactions of 200 GeV muons on hydrogen. After subtracting the contributions from hadron electromagnetic decays and Bethe-Heitler muon bremsstrahlung, residual photons are observed at low p T and low z at a mean level of 0.15±0.06 per interaction. The quark Compton scattering process is unable to explain the data, thus indicating an anomalous photon production.

2 data tables
Table 1

Z distribution of anomalous direct photons.

Table 2

PT distribution of anomalous direct photons.


Production of Charmonium in 250-GeV mu+ - Iron Interactions

The European Muon collaboration Aubert, J.J. ; Bassompierre, G. ; Becks, K.H. ; et al.
Nucl.Phys.B 213 (1983) 1-30, 1983.
Inspire Record 180791 DOI 10.17182/hepdata.34060

The production of J/ ϑ and ϑ′ has been measured in 250 GeV muon iron interactions. The measured total cross sections are σ ( μ N → μ J/ ϑ X)=0.74±0.14 nb and σ ( μ N → μϑ ′X)=0.16 ± 0.07 nb. An upper limit on the cross section times branching ratio for ϒ production of BR · σ ( μ N → μϒ X) < 5.2 × 10 −38 cm 2 (at 90% confidence level) is obtained. About half the J/ ϑ cross section is found to have Z ⩾ 0.95 (where Z = E (J/ ϑ / ν ). The first-order photon-gluon fusion model agrees well with the measured Q 2 and ν dependence of the J/ ϑ data and is used to extract the gluon momentum distribution. However, higher order QCD effects are needed to explain the Z distribution of the J/ ϑ and the observed broadening of the P t 2 distribution with decreasing Z . The decay angular distributions of the J/ ϑ are found to be flat in the s -channel frame, but there is evidence for polarisation in the t -channel frame.

5 data tables
Table 1

NUMBERS ARE CROSS-SECTIONS FOR PSI AND PSI(PRIME) BUT CROSS-SECTION*BR.RATIO FOR THE UPSILON.

Table 2

THE COHERENT PRODUCTION IS NOT SUBTRACTED.

Table 3

THE COHERENT PRODUCTION IS SUBTRACTED.

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$\rho^0$ Production in Deep Inelastic $\mu p$ Interactions

The European Muon collaboration Aubert, J.J. ; Bassompierre, G. ; Becks, K.H. ; et al.
Phys.Lett.B 133 (1983) 370-374, 1983.
Inspire Record 192074 DOI 10.17182/hepdata.30613

Inclusive ϱ 0 meson production has been measured in 120 GeV and 280 GeV muon-proton interactions. Distributions of z and p T 2 are presented. Primary ϱ 0 production is found to be equal to that of π 0 production within errors.

2 data tables
Table 1

No description provided.

Table 2

No description provided.