16,413 research outputs found
Higgs self-coupling in the MSSM and NMSSM after the LHC Run 1
Measuring the Higgs self-coupling is one of the crucial physics goals at the
LHC Run-2 and other future colliders. In this work, we attempt to figure out
the size of SUSY effects on the trilinear self-coupling of the 125 GeV Higgs
boson in the MSSM and NMSSM after the LHC Run-1. Taking account of current
experimental constraints, such as the Higgs data, flavor constraints,
electroweak precision observables and dark matter detections, we obtain the
observations: (1) In the MSSM, the ratio of
has been tightly constrained by the LHC
data, which can be only slightly smaller than 1 and minimally reach 97\%; (2)
In the NMSSM with , a sizable reduction of
can occur and minimally reach 10\%
when the lightest CP-even Higgs boson mass is close to the SM-like
Higgs boson due to the large mixing angle between the singlet and
doublet Higgs bosons; (3) In the NMSSM with , a large enhancement
or reduction can occur,
which is accompanied by a sizable change of coupling. The
future colliders, such as the HL-LHC and ILC, will have the capacity to test
these large deviations in the NMSSM.Comment: 28 pages, discussions and references added, matched to journal
versio
Strain-tunable magnetic and electronic properties of monolayer CrI3
Two-dimensional CrI3 has attracted much attention as it is reported to be a
ferromagnetic semiconductor with the Curie temperature around 45K. By
performing first-principles calculations, we find that the magnetic ground
state of CrI3 is variable under biaxial strain. Our theoretical investigations
show that the ground state of monolayer CrI3 is ferromagnetic under
compression, but becomes antiferromagnetic under tension. Particularly, the
transition occurs under a feasible in-plane strain around 1.8%. Accompanied by
the transition of the magnetic ground state, it undergoes a transition from
magnetic-metal to half-metal to half-semiconductor to spin-relevant
semiconductor when strain varies from -15% to 10%. We attribute these
transitions to the variation of the d-orbitals of Cr atoms and the p-orbitals
of I atoms. Generally, we report a series of magnetic and electronic phase
transition in strained CrI3, which will help both theoretical and experimental
researchers for further understanding of the tunable electronic and magnetic
properties of CrI3 and their analogous
Heavy Grazing of Beef Cattle Combined with Supplementary Sowing to Improve Deteriorated Pastures
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