Study of the Asymmetric Photoproduction of Charmed Mesons using Data from the FOCUS Experiment (in Spanish)
- Centro de Investigacion y Estudios Avanzados, Mexico D.F. (Mexico)
Using data from the fixed target charm-photoproduction experiment, Fermilab FOCUS/E831, they studied the asymmetric production of the mesons: D0, D+ y D$$+\atop{s}$$. Even when the asymmetry in the production of charm particles, defined as the ratio between particles and antiparticles, at next leading order in quantum chromodynamics (QCD) is almost zero, in data we observe asymmetries probably associate dto the fragmentation processes. Since these are the less understood phenomena in QCD, the results in the present work could be of great importance to understand them. We found asymmetries in the production of the mesons D+ and D0 (statistic significant), for the D$$+\atop{s}$$ we only observed an asymmetry not conclusive. We also report a study of the production asymmetries vs. the kinematic variables: p$$2\atop{T}$$ (square transversal momentum of the particles), pL or pZ (longitudinal momentum), xF (Feynman x) and Eγ (photon beam energy).
- Research Organization:
- Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC)
- DOE Contract Number:
- AC02-07CH11359
- OSTI ID:
- 1011156
- Report Number(s):
- FERMILAB-THESIS-2005-103; TRN: US1102160
- Country of Publication:
- United States
- Language:
- Spanish
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