3,177 research outputs found
Complete NLO Operators in the Higgs Effective Field Theory
We enumerate the complete and independent sets of operators at the
next-to-leading order (NLO) in the Higgs effective field theory (HEFT), based
on the Young tensor technique on the Lorentz, gauge and flavor structures. The
operator-amplitude correspondence tells a type of operators forms the on-shell
amplitude basis, and for operators involving in Nambu-Goldstone bosons, the
amplitude basis is further reduced to the subspace satisfying the Adler's zero
condition in the soft momentum limit. Different from dynamical field, the
spurion should not enter into the Lorentz sector, instead it only plays a role
of forming the invariant together with other dynamical fields. With
these new treatments, for the first time we could obtain the 237 (8595)
operators for one (three) generation fermions, 295 (11307) with right-handed
neutrinos, and find there were 6 (9) terms of operators missing and many
redundant operators can be removed in the effective theory without (with)
right-handed neutrinos.Comment: 63 pages, 2 tables, revised version: operators in 4-component
notation, correct typo for countin
Flocking control against the malicious agent
This paper investigates the flocking control of a swarm with a malicious
agent that falsifies its controller parameters to cause collision, division,
and escape of agents in the swarm. A novel geometric flocking condition is
established by designing the configuration of the malicious agent and its
neighbors, under which we propose a hierarchal geometric configuration-based
flocking control method. To help detect the malicious agent, a parameter
estimate mechanism is also provided. The proposed method can achieve the
flocking control goal and meanwhile contain the malicious agent in the swarm
without removing it. Experimental result shows the effectiveness of the
theoretical result
The Bottom-Up EFT: Complete UV Resonances of the SMEFT Operators
The standard model effective field theory (SMEFT) provides systematic
parameterization of all possible new physics above the electroweak scale.
According to the amplitude-operator correspondence, an effective operator can
be decomposed into a linear combination of several j-basis operators, which
correspond to local amplitudes carrying certain spin and gauge quantum numbers
in a particular scattering channel. Based on the Poincare and gauge symmetries
of scattering amplitude, we construct the j-basis using the Casimir method for
both the Lorentz and gauge sectors. The quantum numbers of the j-basis
operators fix the quantum numbers of any intermediate state in the
corresponding amplitudes, such as a UV resonance. This can be re-interpreted as
the j-basis/UV correspondence, thus obtaining the j-bases in all partitions of
fields for an operator amounts to finding all of its UV origins at tree level,
constituting the central part of the bottom-up EFT framework. Applying the
j-basis analysis to SMEFT, we obtain a complete list of possible tree-level UV
origins of the effective operators at the dimension 5, 6, 7, and all the
bosonic operators at the dimension 8.Comment: 123 pages, 19 figures, 34 table
Noninvasive assessment of the carotid and cerebrovascular atherosclerotic plaques by multidetector CT in type-2 diabetes mellitus patients with transient ischemic attack or stroke
BACKGROUND: The cerebrovasuclar artery disease as a common complication of type-2 diabetes mellitus (T2DM) caused huge economic burden and lives threatening to patients. We evaluated the prevalence and morphology of carotid and cerebrovascular atherosclerotic plaques in T2DM patients with transient ischemic attack (TIA) or stroke using multidetector CT (MDCT). METHODS: 64-MDCT and dual-source CT (DSCT) angiographies were performed in 195 T2DM patients with TIA or stroke (mean age 65.7+/-12.8Â years; 118 men) between January 2009 to August 2011. During the process, plaque type, its distribution, extensive and obstructive natures were determined for each segment derived from the patients. RESULTS: Atherosclerotic plaques were detected in 183 (93.8%) patients. A total of 1056 segments with plaque were identified, of which 450 (42.6%) were non-calcified, 192 (18.2%) were mixed and 414 (39.2%) calcified ones. Among them, 562 (53.2%) resulted in mild stenosis, 291 (27.6%) moderate stenosis, 170 (16.1%) severe stenosis and 33 (3.1%) occlusion. Non-calcified plaques contributed 91.8% to non-obstructive lumen narrowing, while mixed and calcified plaques contributed 89.0% and 65.0% respectively. CONCLUSIONS: MDCT angiography detected a high prevalence of plaques in T2DM patients with TIA or stroke. A relatively high proportion of plaques were non-calcified, as well as with non-obstructive stenosis. MDCT angiography might further enhance the detection and management of carotid and cerebrovascular atherosclerosis in T2DM patients with TIA and strok
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