249 research outputs found
Left-Right Symmetry and the Charged Higgs Bosons at the LHC
The charged Higgs boson sector of the Minimal Manifest Left-Right Symmetric
model (MLRSM) is investigated in the context of LHC discovery search for new
physics beyond Standard Model. We discuss and summarise the main processes
within MLRSM where heavy charged Higgs bosons can be produced at the LHC. We
explore the scenarios where the amplified signals due to relatively light
charged scalars dominate against heavy neutral and charged gauge as
well as heavy neutral Higgs bosons signals which are dumped due to large vacuum
expectation value of the right-handed scalar triplet. In particular,
production processes with one and two doubly charged Higgs bosons are
considered. We further incorporate the decays of those scalars leading to multi
lepton signals at the LHC. Branching ratios for heavy neutrino , and
decay into charged Higgs bosons are calculated. These effects are
substantial enough and cannot be neglected. The tri- and four-lepton final
states for different benchmark points are analysed. Kinematic cuts are chosen
in order to strength the leptonic signals and decrease the Standard Model (SM)
background. The results are presented using di-lepton invariant mass and
lepton-lepton separation distributions for the same sign (SSDL) and opposite
sign (OSDL) di-leptons as well as the charge asymmetry are also discussed. We
have found that for considered MLRSM processes tri-lepton and four-lepton
signals are most important for their detection when compared to the SM
background. Both of the signals can be detected at 14 TeV collisions at the LHC
with integrated luminosity at the level of with doubly charged
Higgs bosons up to approximately 600 GeV. Finally, possible extra contribution
of the charged MLRSM scalar particles to the measured Higgs to di-photon
() decay is computed and pointed out.Comment: FCNC analysis is incorporated while fitting the scalar spectrum.
Light doubly charged scalars are still compatible with FCNC. Accepted in
JHEP. New References and figures are added. The fitted scalar spectrum is
given in detail in appendi
GUTs with dim-5 interactions: Gauge Unification and Intermediate Scales
Dimension-5 corrections to the gauge kinetic term of Grand Unified Theories
(GUTs) may capture effects of quantum gravity or string compactification. Such
operators modify the usual gauge coupling unification prediction in a
calculable manner. Here we examine SU(5), SO(10), and E(6) GUTs in the light of
all such permitted operators and calculate the impact on the intermediate
scales and the unification programme. We show that in many cases at least one
intermediate scale can be lowered to even 1-10 TeV, where a neutral Z' and
possibly other states are expected.Comment: 23 pages, 8 figures, 10 tables, Treatment of U(1) mixing effects
corrected. Published version
Extracellular vesicle-mediated transfer of processed and functional RNY5 RNA
Extracellular vesicles (EVs) have been proposed as a means to promote intercellular communication. We show that when human primary cells are exposed to cancer cell EVs, rapid cell death of the primary cells is observed, while cancer cells treated with primary or cancer cell EVs do not display this response. The active agents that trigger cell death are 29- to 31-nucleotide (nt) or 22- to 23-nt processed fragments of an 83-nt primary transcript of the human RNY5 gene that are highly likely to be formed within the EVs. Primary cells treated with either cancer cell EVs, deproteinized total RNA from either primary or cancer cell EVs, or synthetic versions of 31- and 23-nt fragments trigger rapid cell death in a dose-dependent manner. The transfer of processed RNY5 fragments through EVs may reflect a novel strategy used by cancer cells toward the establishment of a favorable microenvironment for their proliferation and invasion
Back reaction effects on the dynamics of heavy probes in heavy quark cloud
We holographically study the effect of back reaction on the hydrodynamical
properties of strongly coupled super Yang-Mills (SYM) thermal
plasma. The back reaction we consider arises from the presence of static heavy
quarks uniformly distributed over SYM plasma. In order to
study the hydrodynamical properties, we use heavy quark as well as heavy
quark-antiquark bound state as probes and compute the jet quenching parameter,
screening length and binding energy. We also consider the rotational dynamics
of heavy probe quark in the back-reacted plasma and analyse associated energy
loss. We observe that the presence of back reaction enhances the energy-loss in
the thermal plasma. Finally, we show that there is no effect of angular drag on
the rotational motion of quark-antiquark bound state probing the back reacted
thermal plasma.Comment: 29 pages, 21 figure
Impact of Surface Chemistry and Doping Concentrations on Biofunctionalization of GaN/Ga‒In‒N Quantum Wells
Correlators of Giant Gravitons from dual ABJ(M) Theory
We generalize the operators of ABJM theory, given by Schur polynomials, in
ABJ theory by computing the two point functions in the free field and at finite
limits. These polynomials are then identified with the states of
the dual gravity theory. Further, we compute correlators among giant gravitons
as well as between giant gravitons and ordinary gravitons through the
corresponding correlators of ABJ(M) theory. Finally, we consider a particular
non-trivial background produced by an operator with an -charge of
and find, in presence of this background, due to the contribution of
the non-planar corrections, the large expansion is replaced by
and respectively.Comment: Latex, 32+1 pages, 2 figures, journal versio
Beyond the Planar Limit in ABJM
In this article we consider gauge theories with a U(N)X U(N) gauge group. We
provide, for the first time, a complete set of operators built from scalar
fields that are in the bi fundamental of the two groups. Our operators
diagonalize the two point function of the free field theory at all orders in
1/N. We then use this basis to investigate non-planar anomalous dimensions in
the ABJM theory. We show that the dilatation operator reduces to a set of
decoupled harmonic oscillators, signaling integrability in a nonplanar large N
limit.Comment: v2: minor revisison
Novel machine learning approaches for modelling the gully erosion susceptibility
© 2020 by the authors. Licensee MDPI, Basel, Switzerland. The extreme form of land degradation caused by the formation of gullies is a major challenge for the sustainability of land resources. This problem is more vulnerable in the arid and semi-arid environment and associated damage to agriculture and allied economic activities. Appropriate modeling of such erosion is therefore needed with optimum accuracy for estimating vulnerable regions and taking appropriate initiatives. The Golestan Dam has faced an acute problem of gully erosion over the last decade and has adversely affected society. Here, the artificial neural network (ANN), general linear model (GLM), maximum entropy (MaxEnt), and support vector machine (SVM) machine learning algorithm with 90/10, 80/20, 70/30, 60/40, and 50/50 random partitioning of training and validation samples was selected purposively for estimating the gully erosion susceptibility. The main objective of this work was to predict the susceptible zone with the maximum possible accuracy. For this purpose, random partitioning approaches were implemented. For this purpose, 20 gully erosion conditioning factors were considered for predicting the susceptible areas by considering the multi-collinearity test. The variance inflation factor (VIF) and tolerance (TOL) limit were considered for multi-collinearity assessment for reducing the error of the models and increase the efficiency of the outcome. The ANN with 50/50 random partitioning of the sample is the most optimal model in this analysis. The area under curve (AUC) values of receiver operating characteristics (ROC) in ANN (50/50) for the training and validation data are 0.918 and 0.868, respectively. The importance of the causative factors was estimated with the help of the Jackknife test, which reveals that the most important factor is the topography position index (TPI). Apart from this, the prioritization of all predicted models was estimated taking into account the training and validation data set, which should help future researchers to select models from this perspective. This type of outcome should help planners and local stakeholders to implement appropriate land and water conservation measures
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