316 research outputs found
QCD and spin effects in black hole airshowers
In models with large extra dimensions, black holes may be produced in
high-energy particle collisions. We revisit the physics of black hole formation
in extensive airshowers from ultrahigh-energy cosmic rays, focusing on
collisional QCD and black hole emissivity effects. New results for rotating
black holes are presented. Monte Carlo simulations show that QCD effects and
black hole spin produce no observable signatures in airshowers. These results
further confirm that the main characteristics of black hole-induced airshowers
do not depend on the fine details of micro black hole models.Comment: 6 pages, 2 figures, accepted for publication in Physical Review
Discriminating Supersymmetry and Black Holes at the CERN Large Hadron Collider
We show how to differentiate the minimal supersymmetric extension of the standard model from black hole events at the CERN Large Hadron Collider. Black holes are simulated with the CATFISH generator. Supersymmetry simulations use a combination of pythia and isajet. Our study, based on event-shape variables, visible and missing momenta, and analysis of dilepton events, demonstrates that supersymmetry and black hole events at the LHC can be easily discriminated
String Resonances at the Large Hadron Collider
The Large Hadron Collider promises to discover new physics beyond the standard model. An exciting possibility is the formation of string resonances at the TeV scale. In this article, we show how string resonances may be detected at the LHC in the pp →γ + jet channel. Our study is based on event-shape variables, missing energy and momentum, maximum transverse momentum of photons and dijet invariant mass. These observables provide interesting signatures which enable us to discriminate string events from the standard model background
Environmental Pursuits In Nanomaterial Systems Science With Indian Exemplars
The behavior and pattern of NPs of minerals in the evolutionary history of the earth vis – a –vis the environmental context are inquired into, with a riverine system as a model. The study of fractal dimensions of NPs of interest serves as an aid to obtain a comprehensive view of natural NPs in the model system. The present study combines inputs from work done on nanoparticles, derived from the Subanarekha River System and products of base metal mine effluents that are rich in NPs of minerals. The authors believe this study would help to establish certain universalities about NPs and provide an updated framework for understanding the current state of nanomineral science
Supersymmetry versus black holes at the LHC
Supersymmetry and extra dimensions are the two most promising candidates for
new physics at the TeV scale. Supersymmetric particles or extra-dimensional
effects could soon be observed at the Large Hadron Collider. We propose a
simple but powerful method to discriminate the two models: the analysis of
isolated leptons with high transverse momentum. Black hole events are simulated
with the CATFISH black hole generator. Supersymmetry simulations use a
combination of PYTHIA and ISAJET, the latter providing the mass spectrum. Our
results show the measure of the dilepton invariant mass provides a strong
signature to differentiate supersymmetry and black hole events at the Large
Hadron Collider. Analysis of event-shape variables and multilepton events
complement and strengthen this conclusion.Comment: 12 pages, 5 figure
Discriminating Supersymmetry and Black Holes at the Large Hadron Collider
We show how to differentiate the minimal supersymmetric extension of the
standard model from black hole events at the Large Hadron Collider. Black holes
are simulated with the CATFISH generator. Supersymmetry simulations use a
combination of PYTHIA and ISAJET. Our study, based on event shape variables,
visible and missing momenta, and analysis of dilepton events, demonstrates that
supersymmetry and black hole events at the LHC can be easily discriminated.Comment: 12 pages, 8 figure
Network analysis reveals common host protein/s modulating pathogenesis of neurotropic viruses
Network analysis through graph theory provides a quantitative approach to characterize specific proteins and their constituent assemblies that underlie host-pathogen interactions. In the present study, graph theory was used to analyze the interactome designed out of 50 differentially expressing proteins from proteomic analysis of Chandipura Virus (CHPV, Family: Rhabdoviridae) infected mouse brain tissue to identify the primary candidates for intervention. Using the measure of degree centrality, that quantifies the connectedness of a single protein within a milieu of several other interacting proteins, DJ-1 was selected for further molecular validation. To elucidate the generality of DJ-1’s role in propagating infection its role was also monitored in another RNA virus, Japanese Encephalitis Virus (JEV, Family: Flaviviridae) infection. Concurrently, DJ-1 got over-expressed in response to reactive oxygen species (ROS) generation following viral infection which in the early phase of infection migrated to mitochondria to remove dysfunctional mitochondria through the process of mitophagy. DJ-1 was also observed to modulate the viral replication and interferon responses along with low-density lipoprotein (LDL) receptor expression in neurons. Collectively these evidences reveal a comprehensive role for DJ-1 in neurotropic virus infection in the brain
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