Feynman-x and transverse-momentum dependence of D+/- and D0, D¯0 production in 250 GeV π--nucleon interactions
Abstract
We measure the differential cross section with respect to Feynman-x (xF) and transverse momentum (PT) for charm meson production using targets of Be, Al, Cu, and W. In the range 0.1<xF<0.7, dσ/dxF is well fit by the form (1-xF)n with n=3.9+/-0.3. The difference between n values for D- and D+ is 1.1+/-0.7. However, we find an asymmetry of 0.18+/-0.06 favoring the production of D- compared to D+. In the lower PT range, <2 GeV, dσ/dP2T is well fit by the form exp(-b×P2T) with b=1.03+/-0.06 GeV-2, while in the higher PT range, 0.8 to 3.6 GeV, it is well fit by the form exp(-b'×PT) with b'=2.76+/-0.08 GeV-1. The shape of the differential cross section has no significant dependence on atomic mass of the target material.
- Publication:
-
Physical Review Letters
- Pub Date:
- November 1992
- DOI:
- 10.1103/PhysRevLett.69.3147
- Bibcode:
- 1992PhRvL..69.3147A
- Keywords:
-
- 13.85.Ni;
- 12.38.Qk;
- 25.80.Ls;
- Inclusive production with identified hadrons;
- Experimental tests;
- Pion inclusive scattering and absorption