31,200 research outputs found
A General MSSM Parameter Scan
The excluded tan(beta) range and Higgs boson mass regions in the framework of
the Minimal Supersymmetric extension of the Standard Model (MSSM) depend on
several parameters. The Higgs boson masses, cross-sections and branching
fractions have been determined including two-loop diagrammatic calculations.
The limits obtained with a more general scan over the parameter space of the
MSSM are compared with those in the so-called benchmark scenario. The
combination of the searches for Higgs particles in the 1999 data collected by
the DELPHI collaboration at center-of-mass energies between 191.6 and 201.7 GeV
allows stringent limits to be set in combination with previous DELPHI results.
In addition, an interpretation in the framework of the general MSSM scan of the
2000 LEP data at the hightest energies between 201.7 and 209.0 GeV is given. We
show that the current data for the HZ and hA production can be comfortably
accommodated in the MSSM.Comment: 3 pages, 3 figure
Orthogonal subsets of classical root systems and coadjoint orbits of unipotent groups
Let be a classical root system and be a field of sufficiently
large characteristic. Let be the classical group over with the root
system , be its maximal unipotent subgroup and be the
Lie algebra of . Let be an orthogonal subset of and be a
coadjoint orbit of associated with . We construct a polarization of
at the canonical form on . We also find the dimension of
in terms of the Weyl group of . As a corollary, we determine all
possible dimensions of irreducible complex represenations of the group for
the case of finite field .Comment: 11 page
Comparison of Higgs Boson Mass and Width Determination of the LHC and a Linear Collider
Two important properties of a Higgs boson are its mass and width. They may
distinguish the Standard Model (SM) Higgs boson from Higgs bosons of extended
models. We show results from a direct mass and width reconstruction for a Higgs
boson mass range from 120 to 340 GeV. The mass and width have been
reconstructed from the H --> ZZstar --> mu+mu-mu+mu- reaction in an LHC
simulation of the CMS detector. The determined mass accuracy has been compared
with that obtained from studies for a linear collider (LC). The mass precision
from the latter studies is derived by scaling previous LC simulation results
according to the expected event rates. For the Higgs boson width we compare a
direct determination with indirect methods and find good complementarity.Comment: 4 pages, 4 figure
âThe Right to the Cityâ An Ecosystemic Approach to Better Cities, Better Life
Urbanism is a focus on cities and urban areas, their geography, economies, politics, social characteristics, as well as the effects on, and caused by, the built environment; it is linked to various aspects of quality of life: education, culture, justice, labour, environment, health, safety, housing, leisure, transport, consumption. This year, the United Nations proposed the following questions for the citizens of the world: What is the best thing about your city? What's the worst thing about your city? What do you want the authorities to do about it? What can you do about it? It is a clear attempt to foster civic participation and personal engagement, but to make things happen it is necessary to create active socio-cultural niches at many societal levels.Urbanism; politics; education; culture; justice
- âŠ