Cross sections for deuterium, tritium, and helium production in p¯p collisions at s=1.8 TeV

T. Alexopoulos,E. Anderson, N. Biswas,A. Bujak,D. Carmony,A. Erwin,C. Findeisen,A. Goshaw,K. Gulbrandsen,L. Gutay,A. Hirsch,C. Hojvat,J. Jennings,V. Kenney,C. Lindsey,J. LoSecco,N. Morgan,K. Nelson,S. Oh,N. Porile,L. Preston,R. Scharenberg,B. Stringfellow, M. Thompson,F. Turkot,W. Walker,C. Wang, J. Warchol

PHYSICAL REVIEW D（2000）

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摘要

We present the results of a search for the production of Light elements in (p) over bar p collisions at the Fermilab Tevatron collider. Momentum, time of flight, and dE/dx measurements are used to distinguish nuclei from elementary particles. A production ratio for deuterium to hydrogen is calculated and compared to the primordial value of the big bang model. Some evidence for tritium is found and none for helium isotopes.

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关键词

time of flight,big bang,elementary particles,cross section

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