6,144 research outputs found
Varying the Universality of Supersymmetry-Breaking Contributions to MSSM Higgs Boson Masses
We consider the minimal supersymmetric extension of the Standard Model (MSSM)
with varying amounts of non-universality in the soft supersymmetry-breaking
contributions to the Higgs scalar masses. In addition to the constrained MSSM
(CMSSM) in which these are universal with the soft supersymmetry-breaking
contributions to the squark and slepton masses at the input GUT scale, we
consider scenarios in which both the Higgs scalar masses are non-universal by
the same amount (NUHM1), and scenarios in which they are independently
non-universal (NUHM2). We show how the NUHM1 scenarios generalize the (m_{1/2},
m_0) planes of the CMSSM by allowing either mu or m_A to take different (fixed)
values and we also show how the NUHM1 scenarios are embedded as special cases
of the more general NUHM2 scenarios. Generalizing from the CMSSM, we find
regions of the NUHM1 parameter space that are excluded because the LSP is a
selectron. We also find new regions where the neutralino relic density falls
within the range preferred by astrophysical and cosmological measurements,
thanks to rapid annihilation through direct-channel Higgs poles, or
coannihilation with selectrons, or because the LSP composition crosses over
from being mainly bino to mainly Higgsino. Generalizing further to the NUHM2,
we find regions of its parameter space where a sneutrino is the LSP, and others
where neutralino coannihilation with sneutrinos is important for the relic
density. In both the NUHM1 and the NUHM2, there are slivers of parameter space
where the LHC has fewer prospects for discovering sparticles than in the CMSSM,
because either m_{1/2} and/or m_0 may be considerably larger than in the CMSSM.Comment: 39 pages, 16 figure
The Higgs Mass beyond the CMSSM
The apparent discovery of a Higgs boson with mass ~125 GeV has had a
significant impact on the constrained minimal supersymmetric extension of the
Standard Model in which the scalar masses, gaugino masses and tri-linear
A-terms are assumed to be universal at the GUT scale (the CMSSM). Much of the
low-mass parameter space in the CMSSM has been excluded by supersymmetric
particle searches at the LHC as well as by the Higgs mass measurement and the
emergent signal for B_s to mu^+ mu^-. Here, we consider the impact of these
recent LHC results on several variants of the CMSSM with a primary focus on
obtaining a Higgs mass of ~125 GeV. In particular, we consider the one- and
two-parameter extensions of the CMSSM with one or both of the Higgs masses set
independently of the common sfermion mass, m_0 (the NUHM1,2). We also consider
the one-parameter extension of the CMSSM in which the input universality scale
M_in is below the GUT scale (the sub-GUT CMSSM). We find that when M_in < M_GUT
large regions of parameter space open up where the relic density of neutralinos
can successfully account for dark matter with a Higgs boson mass ~125 GeV. In
some of these regions essential roles are played by coannihilation processes
that are usually less important in the CMSSM with M_in = M_GUT. Finally, we
reconsider mSUGRA models with sub-GUT universality, which have the same number
of parameters as the CMSSM. Here too, we find phenomenologically viable regions
of parameter space, which are essentially non-existent in GUT-scale mSUGRA
models. Interestingly, we find that the preferred range of the A-term straddles
that predicted by the simplest Polonyi model.Comment: 28 pages, 12 figure
No-signaling, entanglement-breaking, and localizability in bipartite channels
A bipartite quantum channel represents the interaction between systems,
generally allowing for exchange of information. A special class of bipartite
channels are the no-signaling ones, which do not allow communication. In Ref.
[1] it has been conjectured that all no-signaling channels are mixtures of
entanglement-breaking and localizable channels, which require only local
operations and entanglement. Here we provide the general realization scheme,
giving a counterexample to the conjecture.Comment: 4 pages, revtex
DISTRIBUTION OF ORGANIC CARBON, PHOSPHORUS AND NITROGEN IN THE SEDIMENTS OF MANAKUDY ESTUARY
Estuary is a transition zone between land and sea as well as freshwater and salt water. In the estuary, the water carrying agricultural, industrial and domestic wastes are deposited as sediment. Distribution of organic carbon, total phosphorus and total nitrogen in the sediments of Manakudy estuary has been studied.
Based on their nature, five stations have been earmarked for sampling. The C/N ratio of these sediments is very high compared to the sediments from Mandovi estuary goa
That Does Not Compute: Unpacking the Fembot in American Science Fiction.
M.A. Thesis. University of HawaiÊ»i at MÄnoa 2017
On the Josephson Coupling between a disk of one superconductor and a surrounding superconducting film of a different symmetry
A cylindrical Josephson junction with a spatially dependent Josephson
coupling which averages to zero is studied in order to model the physics of a
disk of d-wave superconductor embedded in a superconducting film of a different
symmetry. It is found that the system always introduces Josepshon vortices in
order to gain energy at the junction. The critical current is calculated. It is
argued that a recent experiment claimed to provide evidence for s-wave
superconductivity in may also be consistent with d-wave
superconductivity. Figures available from the author on request.Comment: 10 pages, revtex3.0, TM-11111-940321-1
The acquisition of concepts of light and sound in the intermediate grades
Thesis (Ed.D.)--Boston University
- âŠ