632 research outputs found
Exotic Higgs Decay via Charged Higgs
The most common search channel for heavy neutral Higgses in models with an
extension of the Standard Model Higgs sector is ,
which becomes ineffective when new decay modes of open. In this paper,
we analyzed two such channels involving charged Higgses in the final states:
and . With the
consequent decay of , we found that the limits for
vary from 30 to 10 fb for between
300 and 1000 GeV for 95% C.L. exclusion, and about 80 to 30 fb for 5
discovery. For mode, 95% C.L. limits on vary from 9 to 4 fb for
between 400 and 1000 GeV, while the 5 reach is about 20 to 10
fb. We further interpret the cross section limits in the Type II 2HDM parameter
space. While offers great sensitivity in both
versus and versus parameter
space, can cover most of the parameter space for
. Reach in is more limited, especially for
. It is, however, complementary to when is accidentally suppressed.Comment: 19 pages, 11 figures, version appear in JHE
Probing Exotic Charged Higgs Decays in the Type-II 2HDM through Top Rich Signal at a Future 100 TeV pp Collider
The exotic decay modes of non-Standard Model Higgs bosons are efficient in
probing the hierarchical Two Higgs Doublet Models (2HDM). In particular, the
decay mode serves as a powerful channel in searching for
charged Higgses. In this paper, we analyzed the reach for at a 100 TeV collider, and showed that it extends the reach of
the previously studied final states once above the top threshold.
Top tagging technique is used, in combination with the boosted decision tree
classifier. Almost the entire hierarchical Type-II 2HDM parameter space can be
probed via the combination of all channels at low region.Comment: 17 page
Safety Model Checking with Complementary Approximations
Formal verification techniques such as model checking, are becoming popular
in hardware design. SAT-based model checking techniques such as IC3/PDR, have
gained a significant success in hardware industry. In this paper, we present a
new framework for SAT-based safety model checking, named Complementary
Approximate Reachability (CAR). CAR is based on standard reachability analysis,
but instead of maintaining a single sequence of reachable- state sets, CAR
maintains two sequences of over- and under- approximate reachable-state sets,
checking safety and unsafety at the same time. To construct the two sequences,
CAR uses standard Boolean-reasoning algorithms, based on satisfiability
solving, one to find a satisfying cube of a satisfiable Boolean formula, and
one to provide a minimal unsatisfiable core of an unsatisfiable Boolean
formula. We applied CAR to 548 hardware model-checking instances, and compared
its performance with IC3/PDR. Our results show that CAR is able to solve 42
instances that cannot be solved by IC3/PDR. When evaluated against a portfolio
that includes IC3/PDR and other approaches, CAR is able to solve 21 instances
that the other approaches cannot solve. We conclude that CAR should be
considered as a valuable member of any algorithmic portfolio for safety model
checking
A review of wearable antenna research
With the rapid popularization of IOT applications, wearable devices have been widely used in many fields such as sports and health, entertainment and medical assistance. In addition to the early wearable form, more attachment and implantable wearable devices are constantly developed, and the development of these new wearable devices is largely due to the development of miniaturization antenna technology. This paper discusses the different realization methods and performance index requirements of wearable antenna, introduces the research situation of wearable antenna at home and abroad in recent years, and analyzes the development trend of wearable antenna
Optimal controller design for non-affine nonlinear power systems with static var compensators for hybrid UAVs
s Mr. S. Venkataiah is thankful to the University Grants Commission, New Delhi, for the award of UGC-BSR-RFSMS Junior Research Fellowship. Dr. S. Uthanna thankful to the University Grants Commission for the award of UGC-BSR Faculty Fellowship.A generalized non-affine nonlinear power system model is presented for a single machine bus power system with a Static Var Compensator (SVC) or State Var System (SVS) for hybrid Unmanned Aerial Vehicles (UAVs). The model is constructed by differential algebraic equations on the MATLAB-Simulink platform with the programming technique of its S-Function. Combining the inverse system method and the Linear Quadratic Regulation (LQR), an optimized SVC controller is designed. The simulations under three fault conditions show that the proposed controller can effectively improve the power system transient performance.publishersversionpublishe
Light Scalars at FASER
FASER, the ForwArd Search ExpeRiment, is a currently operating experiment at
the Large Hadron Collider (LHC) that can detect light long-lived particles
produced in the forward region of the LHC interacting point. In this paper, we
study the prospect of detecting light CP-even and CP-odd scalars at FASER and
FASER 2. Considering a model-independent framework describing the most general
interactions between a CP-even or CP-odd scalar and SM particles using the
notation of coupling modifiers in the effective Lagrangian, we develop the
general formalism for the scalar production and decay. We then analyze the
FASER and FASER 2 reaches of light scalars in the large region of
the Type-I two Higgs double model as a case study, in which light scalars with
relatively long lifetime could be accommodated. In the two benchmark scenarios
we considered, the light (pseudo)scalar decay length varies in meters. Both FASER and FASER 2 can probe a large part of the parameter
space in the large region up to , extending beyond the
constraints of the other existing experiments.Comment: 37 pages, 6 figure
A survey of electromagnetic influence on uavs from an ehv power converter stations and possible countermeasures
National Natural Science Foundation of China (Grant Nos. 11872148, U1908217, 61801034).It is inevitable that high-intensity, wide-spectrum electromagnetic emissions are generated by the power electronic equipment of the Extra High Voltage (EHV) power converter station. The surveillance flight of Unmanned Aerial Vehicles (UAVs) is thus, situated in a complex electromagnetic environment. The ubiquitous electromagnetic interference demands higher electromagnetic protection requirements from the UAV construction and operation. This article is related to the UAVs patrol inspections of the power line in the vicinity of the EHV converter station. The article analyzes the electromagnetic interference characteristics of the converter station equipment in the surrounding space and the impact of the electromagnetic emission on the communication circuits of the UAV. The anti-electromagnetic interference countermeasures strive to eliminate or reduce the threats of electromagnetic emissions on the UAV’s hardware and its communication network.publishersversionpublishe
A novel circularly polarized filtering antenna with high out‐of‐band radiation rejection level
In this paper, a circularly polarized filtering antenna with high out‐of‐band radiation rejection level is proposed. The entire design consists of a patch and a filtering feeding network, which are connected by metallic pins. First, a high‐selectivity filtering power divider is constructed utilizing two shunted bandpass filter. Next, a 90° phase difference could be realized by adjusting the length of the two outputs of the power divider. The measured transmission coefficient of the feeding network is 6.3 dB at 2 GHz. The measured axial ratio is below 3 dB within the operating band of the proposed antenna, which represents the effectiveness of the proposed feeding network. In addition, the obvious radiation nulls can be found from the antenna measurement because of the transmission zeros introducing by the filtering power divider. The measured gain is 5.73 dB at 2 GHz and decreases dramatically in stopband. Specially, the measured gain is −30 and −41 dB at 1.95 and 2.06 GHz. The proposed antenna has an excellent filtering characteristic compared with those without the filtering feeding network. To sum up, the proposed antenna and filtering power divider are promising in the modern wireless communication systems.Peer Reviewedhttps://deepblue.lib.umich.edu/bitstream/2027.42/140028/1/mop30929.pdfhttps://deepblue.lib.umich.edu/bitstream/2027.42/140028/2/mop30929_am.pd
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