23,747 research outputs found
Higgs searches at CMS
Results are summarized from searches for the standard model Higgs boson in pp
collisions at sqrt(s) = 7 and 8 TeV in the CMS experiment at the LHC. The
measurements of mass, cross section, and properties of the narrow resonance
recently observed are presented. The searches beyond standard model Higgs
boson, in the CMS experiment at the LHC, are highlighted.Comment: 14 pages, 15 figures, Proceedings of the PIC 2012, Strbske Pleso,
Slovaki
Ferromagnetic ground states of the Hubbard model on a complete graph
We use group theory to derive the exact analytical expression of the
ferromagnetic ground states of the Hubbard model on a complete graph for
arbitrary lattice sites f and for arbitrary fillings . We find that for
and for the ground state is maximally ferromagnetic with total
spin . For the ground state is still ferromagnetic but
becomes degenerate with respect to .Comment: latex fil
Matter wave quantum dots (anti-dots) in ultracold atomic Bose-Fermi mixtures
The properties of ultracold atomic Bose-Fermi mixtures in external potentials
are investigated and the existence of gap solitons of Bose-Fermi mixtures in
optical lattices demonstrated. Using a self-consistent approach we compute the
energy spectrum and show that gap solitons can be viewed as matter wave
realizations of quantum dots (anti-dots) with the bosonic density playing the
role of trapping (expulsive) potential for the fermions. The fermionic states
trapped in the condensate are shown to be at the bottom of the Fermi sea and
therefore well protected from thermal decoherence. Energy levels, filling
factors and parameters dependence of gap soliton quantum dots are also
calculated both numerically and analytically.Comment: Extended version of talk given at the SOLIBEC conference, Almagro,
Spain, 8-12 February 2005. To be published on Phys.Rev.
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