10,693,578 research outputs found
W Boson Physics at the Fermilab Tevatron Collider
This talk at the XVIII International Conference on Physics in Collision,
Frascati, Italy, June 17-19, 1998, presents CDF and D0 results on W and Z Boson
Production Cross Sections, the W Boson Width, Rare W Boson Decays, Trilinear
Gauge Boson Couplings, and the W Boson Mass.Comment: 9 pages, with 15 figure
An estimate for the average spectral measure of random band matrices
For a class of random band matrices of band width , we prove regularity of
the average spectral measure at scales , and find its
asymptotics at these scales.Comment: 19 pp., revised versio
theory of weights for rough homogeneous singular integrals and commutators
Quantitative estimates for rough homogeneous singular
integrals and commutators of symbols and are
obtained. In particular the following estimates are proved: % %
and % % for and .Comment: 19 page
Minimal length elements of finite Coxeter groups
We give a geometric proof that minimal length elements in a (twisted)
conjugacy class of a finite Coxeter group have remarkable properties with
respect to conjugation, taking powers in the associated Braid group and taking
centralizer in .Comment: 19 page
Quasifission and difference in formation of evaporation residues in the O+W and F+Ta reactions
The excitation functions of capture, complete fusion, and evaporation residue
formation in the O+W and F+Ta reactions leading
to the same Pb compound nucleus has been studied theoretically to
explain the experimental data showing more intense yield of evaporation residue
in the former reaction in comparison with that in the latter reaction. The
observed difference is explained by large capture cross section in the former
and by increase of the quasifission contribution to the yield of fission-like
fragments in the F+Ta reaction at large excitation energies. The
probability of compound nucleus formation in the O+W reaction is
larger but compound nuclei formed in both reactions have similar angular
momentum ranges at the same excitation energy. The observed decrease of
evaporation residue cross section normalized to the fusion cross section in the
F+Ta reaction in comparison with the one in the
O+W reaction at high excitation energies is explained by the
increase of hindrance in the formation of compound nucleus connected with more
quick increase of the quasifission contribution in the F induced
reaction. The spin distributions of the evaporation residue cross sections for
the two reactions are also presented.Comment: 11 pages, 5 figure
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