McCal, D.
nucl-ex
Muon production
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Study of pi- n and pi- C-12 Interactions Involving Strange Particles at the Momentum of 40-GeV/c

Angelov, N. ; Vishnevskaya, K.P. ; Grishin, V.G. ; et al.
Yad.Fiz. 24 (1976) 732-741, 1976.
Inspire Record 100544 DOI 10.17182/hepdata.18228

None

5 data tables
Table 1

No description provided.

Table 2

No description provided.

Table 3

No description provided.

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Observation of a dimuon resonance at 9.5-GeV in 400-GeV proton - nucleus collisions

The E288 collaboration Herb, S.W. ; Hom, D.C. ; Lederman, L.M. ; et al.
Phys.Rev.Lett. 39 (1977) 252-255, 1977.
Inspire Record 120368 DOI 10.17182/hepdata.42613

Dimuon production is studied in 400-GeV proton-nucleus collisions. A strong enhancement is observed at 9.5 GeV mass in a sample of 9000 dimuon events with a mass $m_{\mu^+\mu^-} \to$ 5 GeV.

1 data table
Table 1

Two peaks were observed. Mass spectrum was fitted to one and two resonance hypothesis.


Test of Scaling in Muon Pair Production by Hadrons

Antreasyan, D. ; Cronin, J.W. ; Frisch, Henry J. ; et al.
Phys.Rev.Lett. 39 (1977) 906, 1977.
Inspire Record 5448 DOI 10.17182/hepdata.20946

We have measured the inclusive production of massive dimuons (7<~Mμμ<~11 GeV/c2) by 200-, 300-, and 400-GeV protons incident on Cu in order to check whether the dimensionless cross section Mμμ3[dσdMμμdy]y=0 is a function of Mμμ2s alone, where s is the square of the c.m. energy. The results support the scaling hypothesis.

3 data tables
Table 1

No description provided.

Table 2

No description provided.

Table 3

No description provided.


Study of the high mass dimuon continuum in 400-GeV proton - nucleus collisions

Kaplan, D.M. ; Fisk, R.J. ; Ito, A.S. ; et al.
Phys.Rev.Lett. 40 (1978) 435, 1978.
Inspire Record 122485 DOI 10.17182/hepdata.20947

The mass spectrum of muon pairs in the range 5 to 15 GeV is studied in the inclusive reaction p+nucleus→μ++μ−+anything. The ϒ and continuum distribution are presented as is the A dependence of the continuum. Comparison with a parton-annihilation model yields a sea-quark distribution.

2 data tables
Table 1

No description provided.

Table 2

No description provided.


Study of scaling in hadronic production of dimuons

Yoh, J.K. ; Herb, S.W. ; Hom, D.C. ; et al.
Phys.Rev.Lett. 41 (1978) 684, 1978.
Inspire Record 130804 DOI 10.17182/hepdata.3337

We present proton-nucleus dimuon-production cross sections for masses between 4 and 15 GeV, center-of-mass rapidities between -0.23 and 0.6 and incident energies of 200, 300, and 400 GeV. The data confirm scaling to the 20% level. The dependence of continuum 〈pT〉 on beam energy is also presented.

6 data tables
Table 1

No description provided.

Table 2

No description provided.

Table 3

No description provided.

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Evidence for the Upsilon'' and a Search for New Narrow Resonances

Ueno, K. ; Brown, B.C. ; Brown, C.N. ; et al.
Phys.Rev.Lett. 42 (1979) 486-489, 1979.
Inspire Record 132766 DOI 10.17182/hepdata.42707

The production of the ϒ family in proton-nucleus collisions is clarified by a sixfold increase in statistics. Constraining ϒ,ϒ′ masses to those observed at DORIS we find the statistical significance of the ϒ′′ to be 11 standard deviations. The dependence of ϒ production on pt, y, and s is presented. Limits for other resonance production in the mass range 4-18 GeV are determined.

2 data tables
Table 1

Cross section times branching ratio.

Table 2

No description provided.


INVESTIGATION OF pi- C-12 INTERACTIONS AT P (pi-) = 40-GeV/c ACCOMPANIED BY CUMULATIVE pi MESON EMISSION

Anoshin, A.I. ; Lyubimov, V.B. ; Solovev, M.I. ; et al.
Sov.J.Nucl.Phys. 31 (1980) 347, 1980.
Inspire Record 142915 DOI 10.17182/hepdata.18160

None

22 data tables
Table 1

No description provided.

Table 2

No description provided.

Table 3

No description provided.

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The Contribution of $q \bar{q}$ Annihilations to Dimuon Production in $\pi N$ Interactions

Reece, C. ; LeBritton, J. ; McCal, D. ; et al.
Phys.Lett.B 85 (1979) 427-431, 1979.
Inspire Record 7886 DOI 10.17182/hepdata.27323

We present data on dimuon production by 16 GeV π + and π − beams on a Cu target. From the data we evaluate, for π − N collisions, the fraction of dimuon events that originate from the annihilation process q q ̄ → μ + μ − . Using this information the experimentally determined cross section for the process q q ̄ → μ + μ − is observed to be in agreement with the Drell-Yan model over a wide range of incident energies. The observed deviations from exact scaling are of the order predicted by QCD calculations for the Q 2 -dependence of the nucleon and the pion structure function.

2 data tables
Table 1

CROSS SECTIONS ARE PER COPPER NUCLEUS.

Table 2

CROSS SECTIONS ARE PER COPPER NUCLEUS.


First Evidence for $\Upsilon$ Production by Pions

The Saclay-CERN-College de France-Ecole Poly-Orsay collaboration Badier, J. ; Boucrot, J. ; Burgun, G. ; et al.
Phys.Lett.B 86 (1979) 98-102, 1979.
Inspire Record 142739 DOI 10.17182/hepdata.27309

We have measured the production of massive muon pairs in hadronic collisions at the CERN Super Proton Synchrotron (SPS). A clear signal of production of the ϒ resonance by π + of 200 GeV/ c and π − of 200 and 280 GeV/ c on a platinum target is observed.

2 data tables
Table 1

No description provided.

Table 2

No description provided.


MEASUREMENT OF J / psi PRODUCTION IN 280-GeV/c mu+ IRON INTERACTIONS

The European Muon collaboration Aubert, J.J. ; Bassompierre, G. ; Becks, K.H. ; et al.
Phys.Lett.B 89 (1980) 267-270, 1980.
Inspire Record 143938 DOI 10.17182/hepdata.27264

Virtual photoproduction of J/ ψ mesons has been measured for 280 GeV muon iron interactions in an iron/scintillator calorimeter target. The J/ψ's were identified by their decay into muon pairs. 315 events were observed, about half of which were elastic. The t , Q 2 and v distributions of these elastic events are presented. The v dependence is measured between 40 and 180 Mev and compared with lower energy photoproduction results. The Q 2 dependence is compared with the predictions of the vector dominance model.

4 data tables
Table 1

TPRIME DISTRIBUTION OF ELASTIC J/PSI EVENTS FOR ALL Q2 AND NU WITH 280 GEV MUON BEAM.

Table 2

NORMALIZED Q**2 DISTRIBUTION OF ELASTIC J/PSI EVENTS FOR ALL NU AND T WITH 280 GEV MUON BEAM.

Table 3

EXTRAPOLATION OF Q**2 AND T DEPENDENCE TO CALCULATE D(SIG)/DT AT Q**2=0 AND T=0 FOR ELASTIC J/PSI PHOTOPRODUCTION PER NUCLEON.

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