SIGMA- NUCLEUS --> LAMBDA/CBAR- X
Max results
Sort by Reverse order

Showing 2 of 2 results

Hadronic production of Lambda/c from 600-GeV/c pi-, Sigma- and p beams.

The SELEX collaboration Garcia, F.G. ; Alkhazov, G. ; Atamantchouk, A.G. ; et al.
Phys.Lett.B 528 (2002) 49-57, 2002.
Inspire Record 562836 DOI 10.17182/hepdata.26997

We present data from Fermilab experiment E781 (SELEX) on the hadroproduction asymmetry for anti-Lambda_c compared to Lambda_c+ as a function of xF and pt2 distributions for Lambda_c+. These data were measured in the same apparatus using incident pi-, sigma- beams at 600 GeV/c and proton beam at 540 GeV/c. The asymmetry is studied as a function of xF. In the forward hemisphere with xF >= 0.2 both baryon beams exhibit very strong preference for producing charm baryons rather than charm antibaryons, while the pion beam asymmetry is much smaller. In this energy regime the results show that beam fragments play a major role in the kinematics of Lambda_c formation, as suggested by the leading quark picture.

8 data tables
Table 1

The number of events reconstructed in the signal mass region of LAMBDA/C+ production. Statistical errors only.

Table 2

The number of events reconstructed in the signal mass region of LAMBDA/CBAR- production. Statistical errors only.

Table 3

The number of events reconstructed in the signal mass region of LAMBDA/C+ production. Statistical errors only.

More…

Charge asymmetries for D, D/s and Lambda/c production in Sigma- nucleus interactions at 340-GeV/c.

The WA89 collaboration Adamovich, M.I. ; Alexandrov, Y.A. ; Barberis, D. ; et al.
Eur.Phys.J.C 8 (1999) 593-601, 1999.
Inspire Record 468443 DOI 10.17182/hepdata.49501

CERN experiment WA89 has studied charmed particles produced by a Sigma^- beam at 340 GeV/c on nuclear targets. Production of particles which have light quarks in common with the beam is compared to production of those which do not. Considerable production asymmetries between D^- and D^p, D_s^ and D_s^+ and Lambda_c and Antilambda_c are observed. The results are compared with pion beam data and with theoretical calculations.

3 data tables
Table 1

The expectation values, and the lower limits, of the measured asymmetries between D+ and D- production. Statistical errors only are presented.

Table 2

The expectation values, and the lower limits, of the measured asymmetries between D/S+ and D/S- production. Statistical errors only are presented.

Table 3

The expectation values, and the lower limits, of the measured asymmetries between LAMBDA/C+ and LAMBDA/CBAR- production. Statistical errors only are presented.