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Atomic mass dependence of D+- and D0, anti-D0 production in 250-GeV pi+- nucleon interactions

The Fermilab E769 collaboration Alves, G.A. ; Amato, S. ; Anjos, J.C. ; et al.

Phys.Rev.Lett. 70 (1993) 722-725, 1993.

Inspire Record 341731 DOI 10.17182/hepdata.19741

We measure the relative cross sections for D mesons produced in interactions of π− and π+ beams with targets of Be, Cu, Al, and W. The measurement is based on 1400 fully reconstructed decays of the types D0→K−π+, D+→K−π+π+, and charge conjugates. We find that the cross section for the production of both neutral and charged D’s by either π− or π+ is well fitted by the form Aα where A is the atomic mass and α=1.00±0.05±0.02, where the errors are statistical and systematic, respectively. There is no significant dependence of α on the transverse or longitudinal momentum of the D meson or on the charge of either the incident pion or the produced D mesons.

1 data table

Table 1

No description provided.

Nuclear dependence of charm production by a 340-GeV pi- beam

The WA82 collaboration Adamovich, M. ; Alexandrov, Yu. ; Antinori, F. ; et al.

Phys.Lett.B 284 (1992) 453-456, 1992.

Inspire Record 334932 DOI 10.17182/hepdata.48417

Charmed mesons, produced on silicon, copper and tungsten by 340 GeV π - , have been identified as peaks in invariant mass distributions. The comparison of the yields of charmed particles originating from interactions in Si, Cu and W allows the mass number dependence of the charm hadroproduction cross section to be measured. Assuming the usual parametrization σ c = σ 0 A α , we find α =0.92±0.06 for charmed mesons with 〈 x F 〉=0.24. We do not find any decrease of α with increasing x F in contrast to the case of the production of particles containing only light quarks.

1 data table

Table 1

SI, CU, and WT are used. The cross section is parametrized as : SIG = CONST*A**POWER.

Hadroproduction of D anti-D pairs in the interaction of 350-GeV/c pi- mesons with nuclei

The WA75 collaboration Aoki, S. ; Baroni, G. ; Bisi, V. ; et al.

Prog.Theor.Phys. 87 (1992) 1315-1322, 1992.

Inspire Record 322545 DOI 10.17182/hepdata.48517

Results are presented on the production characteristics of charmed particles obtained from the WA75 emulsion hybrid experiment. The events, selected by the presence of a muon with a high momentum transverse to the beam direction, were located and analysed in nuclear emulsions. Inclusive and correlation properties are systematically compared with the lowest-order QCD calculations for DD hadroproduction. Results concerning the correlation properties indicate some contribution from next-to-leading order [O(α_S^3)] subprocesses.

5 data tables

Table 1

459 DECAYS: 119 D0, 119 DBAR0, 115 D+, 106 D-.

Table 2

177 PAIRS: 38 D0 DBAR0, 46 D0 D-, 45 D+ DBAR0, 48 D+ D-.

Table 3

120 PAIRS: 38 D0 DBAR0, 31 D0 D-, 32 D+ DBAR0, 19 D+ D-.