Quons in Relativistic Theories Must be Bosons or Fermions

The quon algebra describes particles, ``quons,'' that are neither fermions nor bosons using a label q that parametrizes a smooth interpolation between bosons (q = +1) and fermions (q = -1). We derive ``conservation of statistics'' relations for quons in relativistic theories, and show that in relativistic theories quons must be either bosons or fermions.Comment: 9 pages, no figures, late

Probing neutrino nature at Borexino detector with chromium neutrino source

In this paper, we indicate a possibility of utilizing the intense chromium source ($\sim 370 PBq$) in probing the neutrino nature in low energy neutrino experiments with the ultra-low threshold and background real-time Borexino detector located near the source ($\sim 8 m$). We analyze the elastic scattering of electron neutrinos (Dirac or Majorana, respectively) on the unpolarized electrons in the relativistic neutrino limit. We assume that the incoming neutrino beam is the superposition of left-right chiral states. Left chiral neutrinos may be detected by the standard $V A$ and non-standard scalar $S_L$, tensor $T_L$ interactions, while right chiral ones partake only in the exotic $V + A$ and $S_R, T_R$ interactions. Our model-independent study is carried out for the flavour (current) neutrino eigenstates. We compute the expected event number for the standard $V-A$ interaction of the left chiral neutrinos using the current experimental values of standard couplings and in the case of left-right chiral superposition. We show that the significant decrement in the event number due to the interference terms between the standard and exotic interactions for the Majorana $\nu_e$'s may appear. The $90 \%$ C. L. sensitivity contours in the planes of corresponding exotic couplings are also found. The presence of interferences in the Majorana case gives the stronger constraints than for the Dirac neutrinos, even if the neutrino source is placed outside the detector.Comment: 8 pages, 7 eps figure

Low Mass Standard Model Higgs Limit at the Tevatron

The searches for the Standard Model (SM) Higgs Boson at the Fermilab Tevatron by the CDF and D{\O} experiments are presented. Their state of the art techniques, including maximizing Higgs signal acceptance, reducing background through b-jet ID, and with Multi-Variate discrimination between signal and background, are elucidated. The two experiments are able to achieve a sensitivity of three to five times SM cross section ({\sigma}SM) at the benchmark mass point of mH=115 GeV/c2 using the main search channels WH->lvbb, ZH->vvbb, and ZH->llbb, and on combining all the channels from CDF and D{\O}, the observed (expected) limit is 1.56 (1.45) x {\sigma}SM. The present expected limit is 1.8 x {\sigma}SM or below for the entire low mass range, and sensitivity projections at present anticipate in Tevatron Run II a 3{\sigma} sensitivity achievement for mH=115 GeV/c2.Comment: HCP2010 Conference Contributio

Children's subjective well-being : International comparative perspectives

We are enjoined by the United Nations Convention on the Rights of the Child to take account of the views of children. One way this can be done is by asking children about their lives in sample surveys. This paper is a comparison of the results obtained to sample survey questions on subjective well-being of children at two contrasting levels of analysis - international macro (European Union 29) and national level micro (England). At both levels, children¿s well-being is accessed in terms of three subjective domains: (1) personal well-being, (2) relational well-being, and (3) well-being at school. At the micro level we also explore neighbourhood well-being. The results show that at the macro level personal well-being is associated with the material and housing circumstances but not family relationships or family structure. Well-being at school is not associated with any variable. Subjective health is only associated with family structure. At the micro level, although many of the demographic and socio-economic characteristics of children are found to be associated with their well-being in the four domains, these factors explain only a small amount of the variation in these well-being domains

Threshold Behaviour in Gauge Boson Pair Production at LEP 2

We discuss the form of the amplitude for gauge boson pair production at or near threshold.We show that in the case of W-pair production at LEP2 near threshold only one anomalous electromagnetic coupling can contribute. This anomalous coupling is CP violating and contributes to the electric dipole moment of the $W$. Since this coupling is likely to be small, it is important to look for ZZgamma couplings in Zgamma production. These couplings are not suppressed at the W-threshold

Higgs finder and mass estimater

We exploit the spin and kinematic correlations in the decay of a scalar boson into a pair of real or virtual W-bosons, with both W-bosons decaying leptonically, for Higgs boson discovery at 7 TeV LHC energy with 10 fb-1 luminosity. Without reconstruction of the events, we obtain estimators of the higgs mass from the peak and width of the signal distribution in (mll). The separation of signal and background with other distributions, such as the azimuthal angle between two W decay planes, the rapidity difference between the two leptons, missing ET and the pT of leptons, are also prescribed. Our approach identifies the salient higgs to dilepton signatures that allow subtraction of the continuum W*W* background.Comment: 7 pages 10 figures, added reference

Possible Signature of Low Scale Gravity in Ultra High Enegry Cosmic Rays

We show that the existence of low scale gravity at TeV scale could lead to a direct production of photons with energies above 10^22 eV due to annihilation of ultra high energy neutrinos on relic massive neutrinos of the galactic halo. Air showers initialized in the terrestrial atmosphere by these ultra energetic photons could be collected in near future by the new generation of cosmic ray experiments.Comment: 5 pages, 3 figure

Rare decay B→XsννˉB \to X_{s} \nu \bar \nu in the two-Higgs-doublet model of type-III

In this paper, we calculated the new physics contribution to theoretically very clean rare decay $B\to X_{s} \nu \bar{\nu}$ in the general two-Higgs-doublet model (model III). Within the considered parameter space, we found that (a) the new physics contribution can provide one to two orders of enhancement to the branching ratio \calb(B\to X_s \nu \bar{\nu}) and can saturate the experimental bound on \calb(B \to X_s \nu \bar{\nu}) in some regions of the parameter space; (b) besides the CLEO data of $B \to X_s \gamma$, the ALEPH upper limit on \calb (B \to X_s \nu \bar{\nu}) also lead to further constraint on the size of the Yukawa coupling $\lambda_{tt}$: $\lambda_{tt}< 6.4$ for $\lambda_{bb}=2.7$ and \mhp=200 GeV.Comment: 10 pages, 3 figures in eps and 1 in ps, Latex fil