Repp, Gordon W.
nucl-ex
Max results
Sort by Reverse order

Showing 10 of 986 results

Continuum Dimuon Production in anti-p W Collisions at 125-GeV/c

Anassontzis, E. ; Katsanevas, S. ; Kostarakis, P. ; et al.
Phys.Rev.Lett. 54 (1985) 2572, 1985.
Inspire Record 213694 DOI 10.17182/hepdata.20379

The cross section for the reaction p¯N→μ+μ−X with muon pairs in the mass range 4<M<9 GeV/c2 and xF>0 was measured to be σ=0.104±0.005±0.008 nb/nucleon. The distributions dσdxF and M3dσdM were compared to the QCD-improved Drell-Yan model and to calculations including first-order QCD corrections, with use of deep-inelastic structure functions. Excellent agreement with the data was obtained if the calculations were multiplied by factors of 2.45 and 1.41, respectively.

1 data table
Table 1

No description provided.


Small-Angle Electron-Proton Elastic Scattering Cross Sections for Momentum Transfers between 10 and 105 f $^{-2}$

Bartel, W. ; Dudelzak, B. ; Krehbiel, H. ; et al.
Phys.Rev.Lett. 17 (1966) 608-611, 1966.
Inspire Record 846566 DOI 10.17182/hepdata.21827

None

8 data tables
Table 1

No description provided.

Table 2

No description provided.

Table 3

No description provided.

More…

An Investigation of the Emc Effect Using Anti-neutrinos Interactions in Deuterium and Neon

The WA25 & WA59 collaborations Cooper-Sarkar, Amanda M. ; Derkaoui, J. ; Faccini-Turluer, M.L. ; et al.
Phys.Lett.B 141 (1984) 133-139, 1984.
Inspire Record 200773 DOI 10.17182/hepdata.30546

Antineutrino interactions in BEBC are compared to look for differences between the differential cross sections per nucleon in neon and in deuterium. The identical geometries, beam spectra and muon identification criteria and acceptances allow comparison with very small systematic errors. The results are compared in detail with μ and e scattering data from EMC and SLAC. We find no rise in the ratio d σ/ d x ( ν Ne )/σ/ d x ( ν D 2 ) at low x , independent of Q 2 up to Q 2 ∼ 14 GeV 2 .

1 data table
Table 1

VALUES OF Q**2 IN THIS TABLE ARE :- 1.07,2.59,4.33,6.14,7.67,8.28,6.35 (FOR ALL Q**2) AND :-,7.9,9.5,11.5,13.2,13.9,11.6 (FOR Q**2 > 4.5 ).


A Study and Comparison of the Inclusive Reactions pi+ n --> rho0 x and K- p --> anti-K*0 x

Eisner, R.L. ; Fickinger, W. ; Malko, J.A. ; et al.
Nucl.Phys.B 119 (1977) 1, 1977.
Inspire Record 4308 DOI 10.17182/hepdata.35597

Data are presented on the reactions π + n → ϱ 0 + X and K − p → K ∗0 + X at 6.0 and 7.3 GeV/ c , respectively. Comparisons are made between these two reactions and with other reactions involving inclusive vector meson production at different energies.

16 data tables
Table 1

No description provided.

Table 2

No description provided.

Table 3

No description provided.

More…

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.


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.


{Drell-Yan} Events From 400-{GeV}/$c$ Protons: Determination of the $K$ Factor in a Large Kinematical Domain

The NA3 collaboration Badier, J. ; Boucrot, J. ; Bourotte, J. ; et al.
Z.Phys.C 26 (1985) 489, 1985.
Inspire Record 199644 DOI 10.17182/hepdata.16140

We present the analysis of ∼30,000 high mass dimuons (Mμμ>4.5 GeV/c2) produced in 400 GeV/c proton-platinum interactions. A determination of theK-factor is given for different values ofxF andMμμ, and its variations are compared to QCD predictions. The proton structure functions derived from these events are compared to the values obtained in deep inelastic lepton scattering.

1 data table
Table 1

No description provided.


Study of the A-dependence of Inclusive $p$, $\bar{p}$, $\Lambda$ and $\bar{\Lambda}$ Production in $\pi^\pm$ Nucleus Interactions at 30-{GeV}/$c$

The CERN-Lisbon-Neuchatel-Paris-Warsaw collaboration Abreu, M.G. ; Armstrong, T. ; Baubillier, M. ; et al.
Z.Phys.C 25 (1984) 115, 1984.
Inspire Record 200776 DOI 10.17182/hepdata.16301

We present the first results on the production of fast (p>10 GeV/c)p,\(\bar p\), Λ and\(\bar \Lambda \) from π± hydrogen and nucleus interactions at 30 GeV/c using the CERN Ω′ spectrometer. We have used five nuclear targets (C, Al, Cu, Sn, Pb) to study theA-dependence of the inclusive particle distributions in the region 0.3<xF<0.6. The high statistical level of our experiment allows us to demonstrate the differentA-behaviour of baryon and antibaryon inclusive reactions. We relate this difference to the final state interaction inside a nucleus using the formation-zone model.

1 data table
Table 1

No description provided.


LEADING PROTON AND ANTI-PROTON DISTRIBUTIONS IN PROTON NUCLEUS AND ANTI-PROTON NUCLEUS INTERACTIONS

Bailey, R. ; Blanar, G. ; Bosman, M. ; et al.
Z.Phys.C 29 (1985) 1-8, 1985.
Inspire Record 221966 DOI 10.17182/hepdata.15989

We present a study of leading protons and antiprotons inp-nucleus and\(\bar p\)-nucleus on Be, Cu, Ag, W, and U targets. The experiment was performed at the CERN-SPS at a beam energy of 120 GeV. For all targets a suppression of secondary antiprotons with respect to protons is observed. The difference between the\(\bar p\) andp spectra increases with decreasing χ-values and the effect is stronger for heavier nuclei. The features of the data are qualitatively consistent with multiple-collisions modesls. The data are analysed in terms of a dual parton model which gives a satisfactory description of leadingp and\(\bar p\) spectra.

1 data table
Table 1

No description provided.


Inclusive Single Particle Production at 90-Degrees in the Center-Of-Mass System for Nuclear Targets and 28.5-GeV/c Incident Protons

Becker, U. ; Burger, J. ; Chen, M. ; et al.
Phys.Rev.Lett. 37 (1976) 1731-1734, 1976.
Inspire Record 115394 DOI 10.17182/hepdata.21074

The invariant cross section for the inclusive production of π+, π−, K+, K−, p, and p¯ is presented for proton-nucleon interactions at plab=28.5 GeV/c. Beryllium, titanium, and tungsten targets were used and the yields were extrapolated to A=1 using the power law σ∼Aα. The exponent α increases with pT, except for protons. The pT dependence of the cross sections is compared with a simple fireball model.

2 data tables
Table 1

No description provided.

Table 2

No description provided.