5,320 research outputs found
Thanks to 2D and maybe even beyond: 115 GeV and 140 GeV almost Standard Model Higgs without problems
I address: (1) dynamical, likely local Higgs mass generation as resolution to
the 4D hierarchy and vacuum energy problems, (2) possibility that top
condensation may be explained by an interplay among the gluon and scalar
sectors, (3) the Higgs Mass Zero Crossing (HMZC) scale, most likely equal to
{\Lambda}_EWSB, in accord with standard cosmology or classic inflation, and (4)
two preferred Higgs regions centered at 116.5 GeV and 140.5 GeV with related
high energy models. I show that SM in 2D could simultaneously satisfy (a)
complete radiative generation of the Higgs mass via top loop and (b)
cancelation of the remaining leading order corrections to the scalar
propagator. The Higgs mass, m_H, parameterized with k=1 (2), in the leading
order is 113.0{\pm}1.0 GeV (143.4{\pm}1.3 GeV). I show that the SM top
condensation is consistent with the gluon and Higgs mediated top-anti top
interactions at tree level. I predict the QCD fine structure constant with the
mean value only 0.25% away from the world average value at {\sqrt}s=M_Z. The SM
driven theory at energies larger than the HMZC scale necessary includes
effective tachyonic Higgs (Popovic 2001). Here, I map the SM physical Higgs
mass to the low energy HMZC scale (0.8-1.8 TeV). I show that the very "long
lived" SM necessitates Higgs lighter than 146.5{\pm}2 GeV such that there is a
single HMZC scale at energies smaller than the Planck mass. I present candidate
m_H=138.1{\pm}1.8 GeV for the SM valid up to an energy scale, nearly equal
Planck mass, obtained from a conjecture which minimizes the parameters of the
Higgs potential. I introduce a class of models potentially exactly removing
tachyons. I analyze Composite Particles Models (CPM) (Popovic 2002) where top
quark is composite, composed of 3 fundamental fermions, and Higgs scalar is
composite, composed of 2 fundamental fermions, with m_H=2/3 m_t=115.4{\pm}0.9
GeV.Comment: 52 Pages, 11 Figures, 1 Table, 155 References, document created on
July 24, 2010, document submitted to the Physical Review D on July 25, 201
Initial-state randomness as a universal source of decoherence
We study time evolution of entanglement between two qubits, which are part of
a larger system, after starting from a random initial product state. We show
that, due to randomness in the initial product state, entanglement is present
only between directly coupled qubits and only for short times. Time dependence
of the entanglement appears essentially independent of the specific hamiltonian
used for time evolution and is well reproduced by a parameter-free two-body
random matrix model.Comment: 8 pages, 6 figure
Social capital - multiple dimensions of one concept Social Capital, Social Identities – From Ownership to Belonging, Dieter Thoma, Christoph Henning, Hans Bernhard Schmid (eds.), de Gruyter, Berlin/ Boston, 2014
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