Production of charm mesons at high transverse momentum in 515-GeV/c pi- nucleon collisions.

The Fermilab E706 collaboration Apanasevich, L. ; Bacigalupi, J. ; Baker, W. ; et al.
Phys.Rev.D 56 (1997) 1391-1406, 1997.
Inspire Record 440711 DOI 10.17182/hepdata.42224

We present results on the production of high transverse momentum charm mesons in collisions of 515 GeV/c negative pions with beryllium and copper targets. The experiment recorded a large sample of events containing high transverse momentum showers detected in an electromagnetic calorimeter. From these data, a sample of charm mesons has been reconstructed via their decay into the fully charged K pi pi mode. A measurement of the single inclusive transverse momentum distribution of charged D mesons from 1 to 8 GeV/c is presented. An extrapolation of the measured differential cross section yields an integrated charged D cross section of 11.4+-2.7(stat)+-3.3(syst) microbarns per nucleon for charged D mesons with Feynman x greater than zero. The data are compared with expectations based upon next-to-leading order perturbative QCD, as well as with results from PYTHIA. We also compare our integrated charged D cross section with measurements from other experiments.

2 data tables

The mean values of PT are the PT values which correspond to the average values of the cross sections in the appropriate bins as determined by the PYTHIA Mponte-Carlo.

The PYTHIA Monte-Carlo simulation is used for extrapolation of D+- cross section for XL < -0.2.


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

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


Study of D+ and D- Feynman's x distributions in pi- nucleus interactions at the SPS

The WA82 collaboration Adamovich, M. ; Alexandrov, Y. ; Antinori, F. ; et al.
Phys.Lett.B 305 (1993) 402-406, 1993.
Inspire Record 354903 DOI 10.17182/hepdata.48370

Experiment WA82 studied charm production by a π − beam of 340 GeV/ c at the CERN Ω′ spectrometer, using a silicon microstrip vertex detector and an impact parameter trigger. Results on the x F distributions of D + and D − mesons are presented and discussed. A clear excess of D − over D + , increasing at high x F , is observed.

2 data tables

No description provided.

No description provided.


RESULTS ON LAMBDA(c)+, D(s)+, D0 AND D+ PRODUCTION PROPERTIES IN 230-GeV/c pi- Cu INTERACTIONS FROM THE NA32 EXPERIMENT

The ACCMOR collaboration Barlag, S. ; Becker, H. ; Bohringer, T. ; et al.
CERN-EP/88-104, 1988.
Inspire Record 264995 DOI 10.17182/hepdata.12879

None

33 data tables

AUTHORS FIT D2(SIG)/D(XL)/D(PT**2) BY (1-XL)**POWER*EXP(-SLOPE*PT**2).

AUTHORS FIT D2(SIG)/D(XL)/D(PT**2) BY (1-XL)**POWER*EXP(-SLOPE*PT**2).

AUTHORS FIT D2(SIG)/D(XL)/D(PT**2) BY (1-XL)**POWER*EXP(-SLOPE*PT**2).

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Measurement of $D$ Meson Production in 200-{GeV} $\pi^-$ Be Interactions

The ACCMOR collaboration Bailey, R. ; Belau, E.R. ; Böhringer, T. ; et al.
Z.Phys.C 30 (1986) 51, 1986.
Inspire Record 221058 DOI 10.17182/hepdata.2112

We have measured the differential and total cross sections ofD meson production in 200 GeV π−-beryllium interactions, using a sample of 48 fully reconstructed and nearly background-freeD mesons in the decay channelsK∓π±,K∓π±π± andK∓π∓π±π±. A single electron trigger has been used to select events containing a pair of charmed particles. A vertex telescope of 6 silison microstrip detectors allowed the reconstruction of tracks of charged secondaries and the reconstruction of primary and decay vertices with high precision. The ratio of branching fractions for\(\mathop {D^0 }\limits^{( - )}\to K^ \mp\pi ^ \pm\) to\(\mathop {D^0 }\limits^{( - )}\to K^ \mp\pi ^ \mp\pi ^ \pm\pi ^ \pm\), and an upper limit for\(D^0- \bar D^0 \) mixing are presented.

5 data tables

'leading' D-mesons, i.e. D-mesons, containing quarks, from PI- beam. Also AD0-mesons from. D*- decays.

'non-leading' D-mesons.

No description provided.

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