1,224 research outputs found
A split SUSY model from SUSY GUT
We propose to split the sparticle spectrum from the hierarchy between the GUT
scale and the Planck scale. A split supersymmetric model, which gives
non-universal gaugino masses, is built with proper high dimensional operators
in the framework of SO(10) GUT. Based on a calculation of two-loop beta
functions for gauge couplings (taking into account all weak scale threshold
corrections), we check the gauge coupling unification and dark matter
constraints (relic density and direct detections). We find that our scenario
can achieve the gauge coupling unification and satisfy the dark matter
constraints in some part of parameter space. We also examine the sensitivity of
the future XENON1T experiment and find that the currently allowed parameter
space in our scenario can be covered for a neutralino dark matter below about
1.0 TeV.Comment: 16 pages, 3 figure; minor changes, references adde
Heavy colored SUSY partners from deflected anomaly mediation
We propose a deflected anomaly mediation scenario from SUSY QCD which can
lead to both positive and negative deflection parameters (there is a smooth
transition between these two deflection parameter regions by adjusting certain
couplings). Such a scenario can naturally give a SUSY spectrum in which all the
colored sparticles are heavy while the sleptons are light. As a result, the
discrepancy between the Brookheaven experiment and LHC data can be
reconciled in this scenario. We also find that the parameter space for
explaining the anomaly at level can be fully covered by the
future LUX-ZEPLIN 7.2 Ton experiment.Comment: 16 pages, 6 figure
Probing GeV-scale MSSM neutralino dark matter in collider and direct detection experiments
Given the recent constraints from the dark matter (DM) direct detections, we
examine a light GeV-scale (2-30 GeV) neutralino DM in the alignment limit of
the Minimal Supersymmetric Standard Model (MSSM). In this limit without
decoupling, the heavy CP-even scalar plays the role of the Standard Model
(SM) Higgs boson while the other scalar can be rather light so that the DM
can annihilate through the resonance or into a pair of to achieve the
observed relic density. With the current collider and cosmological constraints,
we find that such a light neutralino DM above 6 GeV can be excluded by the
XENON-1T (2017) limits while the survivied parameter space below 6 GeV can be
fully covered by the future germanium-based light dark matter detections (such
as CDEX), by the Higgs coupling precison measurements or by the production
process at an electron-positron collider (Higgs factory).Comment: 15 pages, 5 figures. Discussions and references added, version
accepted by PL
Fully Dynamic Min-Cut of Superconstant Size in Subpolynomial Time
We present a deterministic fully dynamic algorithm with subpolynomial
worst-case time per graph update such that after processing each update of the
graph, the algorithm outputs a minimum cut of the graph if the graph has a cut
of size at most for some . Previously, the best update
time was for any and [Thorup,
Combinatorica'07].Comment: SODA 202
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