New Muon
Inclusive
SIG
Max results
Sort by Reverse order

Showing 2 of 2 results

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.

More…

Ratio of J / psi production cross-sections in deep inelastic muon scattering from tin and carbon

The New Muon collaboration Amaudruz, P. ; Arneodo, M. ; Arvidson, A. ; et al.
Nucl.Phys.B 371 (1992) 553-566, 1992.
Inspire Record 322307 DOI 10.17182/hepdata.32968

We present results on J/ψ production in muon interactions with tin and carbon targets at incident muon energies of 200 and 280 GeV. The ratio of cross sections per nucleon for J/ψ production on tin and carbon, R (Sn/C), is studied as a function of p T 2 , z and x . We find an enhancement for coherent J/ψ production R coh (Sn/C) = 1.54 ± 0.07, a suppression for quasielastic production R qe (Sn/C) = 0.79 ± 0.06 and for inelastic production R in (Sn/C) = 1.13 ± 0.08. The inelastic cross section ratio can be interpreted within the Colour Singlet model as an enhancement of the gluon distribution in tin with respect to that in carbon. The dependence of the ratio on z and p T 2 can explain the discrepancy between the results obtained in previous experiments.

3 data tables
Table 1

Data for coherent events.

Table 2

Data for quasielastic events.

Table 3

Data for inelastic events.