Distinguishing split supersymmetry in Higgs signals at the Large Hadron Collider

We examine the possibility of detecting signals of split supersymmetry in the loop-induced decay h --> gamma gamma of the Higgs boson at the Large Hadron Collider, where charginos, as surviving light fermions of the supersymmetric spectrum, can contribute in the loop. We perform a detailed study of uncertainties in various parameters involved in the analysis, and thus the net uncertainty in the standard model prediction of the rate. After a thorough scan of the parameter space, taking all constraints into account, we conclude that it will be very difficult to infer about split supersymmetry from Higgs signals alone.Comment: 22 pages, 14eps figures, LateX, Changes in the figures and minor modifications in the text. Final version to appear in Physical Review

Right-chiral sneutrinos and long-lived staus: event characteristics at the Large Hadron Collider

We investigate the signals of a supersymmetric scenario where the lighter tau-sneutrino is the lightest supersymmetric particle, while the lighter stau-state is the next lightest. We confirm that such a scenario can be motivated within the framework of minimal supergravity, with just the addition of a right-chiral neutrino superfield. Such a spectrum leads to rather unusual signals of supersymmetry, showing stable tracks of the stau in the muon chambers. We have studied two types of signals, namely, (a) two or more hard jets and two stau tracks, and (b) hard jets with two muons and two stau tracks. We demonstrate that the stau tracks can be distinguished from the muonic ones through proper kinematic cuts which also enable one to remove all standard model backgrounds.Comment: Latex2E, 18 pages, 8 eps figures included (To appear in Phys.Rev. D

Perinatal outcome in relation to mode of delivery in meconium stained amniotic fluid

Background: Meconium stained amniotic fluid is the movement of meconium in the uterus by the fetus during the ANC period or through labor. It has been speculated during the intrapartum and postpartum period as a factor affecting fetal wellbeing and considered as the hallmark symptom of imminent asphyxia. Aim and objectives of current study were to correlate the presence of meconium-stained amniotic fluid with the mode of delivery and perinatal outcome.Methods: A total of 100 women were taken in the study in which meconium stained amniotic fluid and its relation with mode of delivery and neonatal outcome were observed for 2 years.Results: A total of hundred cases were studied. Incidence of types of meconium found to be thin (25%), moderate (34%) and thick (41%). 76% of patients with thin meconium were delivered vaginally without any assistance with instruments, while 64.7% and 68.3% of cases with moderate to thick meconium respectively were delivered by LSCS. In the group of patients with APGAR score more than 7 at five minutes, there is more percentage of patients with thin MSL while in the group of patients with APGAR score less than 7, there is more percentage of patients with thick meconium. No cases of meconium aspiration syndrome were foundConclusions: The types of meconium affect the mode of delivery and fetal outcome. There is no association between having a low birth weight and passage of meconium during labor. The severity of the type of meconium associated with APGAR might be due to severe hypoxia and severe form of nervous system depression leading to cardiovascular and respiratory depression and activation of the parasympathetic nervous system causing anal sphincter relaxation and passage of meconium

General weighted extropy of minimum and maximum ranked set sampling with unequal samples

In industrial, environmental, and ecological investigations, ranked set sampling is a sample method that enables the experimenter to use the whole range of population values. The ranked set sampling process can be modified in two extremely helpful ways: maximum ranked set sampling with unequal samples and minimum ranked set sampling with unequal samples. They permit an increase in set size without too many ranking errors being introduced. In this paper, we are defining general weighted extropy (GWJ) of minimum and maximum ranked set samples when samples are of unequal size (minRSSU and maxRSSU, respectively). Stochastic comparison and monotone properties have been studied under different situations. Additionally, we compare the extropy of these two sampling data with that of ranked set sampling data and simple random sampling data. Finally, Bounds of GWJ of minRSSU and maxRSSU have been obtained.Comment: 16 page

On weighted cumulative residual extropy and weighted negative cumulative extropy

In this paper, we define general weighted cumulative residual extropy (GWCRJ) and general weighted negative cumulative extropy (GWNCJ). We obtain its simple estimators for complete and right censored data. We obtain some results on GWCREJ and GWNCJ. We establish its connection to reliability theory and coherent systems. We also propose empirical estimators of weighted negative cumulative extropy (WNCJ)

Spectral Crossovers and Universality in Quantum Spin-chains Coupled to Random Fields

We study the spectral properties of and spectral-crossovers between different random matrix ensembles (Poissonian, GOE, GUE) in correlated spin-chain systems, in the presence of random magnetic fields, and the scalar spin-chirality term, competing with the usual isotropic and time-reversal invariant Heisenberg term. We have investigated these crossovers in the context of the level-spacing distribution and the level-spacing ratio distribution. We use random matrix theory (RMT) analytical results to fit the observed Poissonian-to-GOE and GOE-to-GUE crossovers, and examine the relationship between the RMT crossover parameter {\lambda} and scaled physical parameters of the spin-chain systems in terms of a scaling exponent. We find that the crossover behavior exhibits universality, in the sense that it becomes independent of lattice size in the large Hamiltonian matrix dimension limit.Comment: 18 Pages, 19 Figures (Published in Physical Review B

Signatures of spectral crossovers in the short- and long-range spectral correlations of a disordered spin-chain with Kramers degeneracy

We investigate several distinct spectral crossovers amongst various integrable and quantum-chaotic limits of a 1D disordered quantum spin-1/2 model, by tuning the relative amplitudes of various Hamiltonian parameters to retain or break relevant unitary and antiunitary symmetries. Since we are specially interested in crossovers involving a Gaussian symplectic ensemble (GSE) limit, we carry out all our calculations with an odd number of spins that naturally results in eigenspectra with Kramers degeneracies. The various crossovers are investigated via detailed studies of both short-range (NNSD) and long-range (spectral rigidity and number variance) spectral correlations. The short-range studies show excellent agreement with RMT predictions. One of the highlights of this study is the systematic investigation of the consequences of retaining both eigenvalues corresponding to every Kramers doublet, in a crossover involving the GSE limit, and see how it evolves to a limit where the KD is naturally lifted. The NNSD plot in the GSE limit exhibits a Dirac delta peak at zero splitting and a renormalized GSE hump at finite splitting, whose general analytical form is derived. With an increasing symmetry breaking magnetic field the NNSD shows an interesting, dynamic two-peaked structure that finally converges to the standard GUE lineshape. We explain this trend in terms of a competition between the splittings amongst distinct Kramers doublets and the Zeeman-like splittings induced by a breaking of time-reversal symmetry. In the long-range spectral correlation studies, we shed light on the extent of agreement between our physical spin systems and RMT predictions. Our studies also show that the long-range correlations may serve to distinguish between the two Poissonian limits (nonlocalized and localized) in the reentrant crossovers, which the short-range correlations fail to distinguish.Comment: 22 Pages, 16 Figures (Published in Physical Review B

PROVISIONING DAY-ZERO CONFIGURATIONS THROUGH PASSIVE RADIO-FREQUENCY IDENTIFICATION

Embodiments presented herein provide a mechanism for setting the day-zero configuration of a network device without having to power on or unbox the device. Using an embedded passive radio-frequency identification (RFID) tag situated in a device, the device can be programmed at a distance using a mobile device