HEPData Search

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Measurement of the proton and deuteron structure functions, F2(p) and F2(d), and of the ratio sigma(L)/sigma(T).

The New Muon collaboration Arneodo, M. ; Arvidson, A. ; Badełek, B. ; et al.

Nucl.Phys.B 483 (1997) 3-43, 1997.

Inspire Record 424154 DOI 10.17182/hepdata.32752

The muon-proton and muon-deuteron inclusive deep inelastic scattering cross sections were measured in the kinematic range 0.002 < x < 0.60 and 0.5 < Q2 < 75 GeV2 at incident muon energies of 90, 120, 200 and 280 GeV. These results are based on the full data set collected by the New Muon Collaboration, including the data taken with a small angle trigger. The extracted values of the structure functions F2p and F2d are in good agreement with those from other experiments. The data cover a sufficient range of y to allow the determination of the ratio of the longitudinally to transversely polarised virtual photon absorption cross sections, R= sigma(L)/sigma(T), for 0.002 < x < 0.12 . The values of R are compatible with a perturbative QCD prediction; they agree with earlier measurements and extend to smaller x.

33 data tables

Table 1

Corrected F2P measurements averaged over all energies. Data are the statistically weighted averages given at the centre of each bin.

Table 2

Corrected F2P measurements averaged over all energies. Data are the statistically weighted averages given at the centre of each bin.

Table 3

Corrected F2P measurements averaged over all energies. Data are the statistically weighted averages given at the centre of each bin.

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Cross-section for production of charmed particles in p N interactions at 70-GeV in proton beam dump experiment at IHEP-JINR neutrino detector

Bunyatov, S.A. ; Nefedov, Yu.A. ;

Phys.Atom.Nucl. 60 (1997) 935-937, 1997.

Inspire Record 405619 DOI 10.17182/hepdata.39330

None

1 data table

Table 1

Linear A-dependece is assumed.

Production of neutral strange particles in p Ar, p Xe and anti-p Xe collisions at 200-GeV

Derado, I. ; Kadija, K. ; Malecki, M. ; et al.

Z.Phys.C 50 (1991) 31-36, 1991.

Inspire Record 28958 DOI 10.17182/hepdata.15007

The production of neutral strange particles (K0, Λ) inp Ar,pXe and$\bar p$Xe collisions at 200 GeV is investigated in the NA5 experiment using a streamer chamber at the CERN SPS. Results are presented on inclusive cross sections, average multiplicities, and on rapidity and transverse momentum distributions of neutral strange particles.

23 data tables

Table 1

No description provided.

Table 2

No description provided.

Table 3

No description provided.

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Measurements of r and a Search for Heavy Quark Production in e+ e- Annihilation at s**(1/2) = 50-GeV and 52-GeV

The AMY collaboration Sagawa, H. ; Mori, T. ; Abe, K. ; et al.

Phys.Rev.Lett. 60 (1988) 93, 1988.

Inspire Record 251270 DOI 10.17182/hepdata.20143

The ratio R of the cross section for e+e− annihilation into hadronic final states to the QED cross section for muon-pair production is measured to be 4.34±0.45±0.30 and 4.23±0.20±0.21 at c.m. energies of 50 and 52 GeV, respectively. From these values of R and an analysis of the event shapes we deduce a 95%-confidence-level upper limit for the production rate of new heavy charge +23e or −13e quarks to be 0.19 units of R.

1 data table

Table 1

No description provided.

Hyperon Production in $e^+ e^-$ Interactions in the $\Upsilon$ Region

The CLEO collaboration Alam, M.S. ; Csorna, S.E. ; Garren, L. ; et al.

Phys.Rev.Lett. 53 (1984) 24, 1984.

Inspire Record 200712 DOI 10.17182/hepdata.20410

We report measurements from the CLEO detector of the rate of Ξ and Λ production in e+e− interactions in the upsilon region. Hyperon production from the decay of the ϒ(1s) is compared with continuum e+e− data. The ratio of the production rates of Λ (and Λ―) to K0 (and K―0) on the ϒ(1s) is 0.21 ± 0.03, much larger than in the continuum, 0.07 ± 0.01. The ratios of the production rates of the Ξ and Λ are comparable, 0.10±0.02 [ϒ(1S)] and 0.07 ± 0.02 (continuum). We discuss some implications of the data for gluon and quark fragmentation models.

2 data tables

Table 1

CONTINUUM IS ECM 10.38 TO 10.64 GEV.

Table 2

No description provided.