37 research outputs found

    Long-term treatment and poor management of psychiatric manifestations in mesial temporal sclerosis leading to suicidality in a young male

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    AbstractPsychiatric disorders including anxiety, psychosis, and aggressive behaviors are frequently diagnosed in patients with epilepsy. In this communication, we report a patients with mesial temporal lobe sclerosis with interictal affective-somatoform (dysphoric) disorders who was never treated for psychiatric manifestations, and who deliberately took a massive dose of phenytoin and phenobarbitone with a motive of suicide, resulting in severe combined toxicity. Such unfortunate incidences may be prevented, and quality of life can be improved with early diagnosis, through the selection of the right antiepileptic drugs, reasonable psychiatric consultation, and appropriate biological and psychological treatments

    B_s --> mu+ mu- decay in the R-parity violating minimal supergravity

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    We study B_s --> mu+ mu- in the context of the R-parity violating minimal supergravity in the high tan beta regime. We find that the lowest value of the branching ratio can go well below the present LHCb sensitivity and hence B_s --> mu+ mu- can even be invisible to the LHC. We also find that the present upper bound on Br(B_s --> mu+ mu-) puts strong constraint on the minimal supergravity parameter space. The constraints become more severe if the upper bound is close to its standard model prediction.Comment: 18 pages, 10 figures; version to be published in European Physical Journal

    Contribution of vector resonances to the {\bar B}_d^0 -> {\bar K}^{*0} mu^+ mu^- decay

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    The fully differential angular distribution for the rare flavor-changing neutral current decay \bar{B}_d^0 -> \bar{K}^{*0} (-> K- pi+) mu+ mu- is studied. The emphasis is placed on accurate treatment of the contribution from the processes \bar{B}_d^0 -> \bar{K}^{*0} (-> K- pi+) V with intermediate vector resonances V = rho(770), omega(782), phi(1020), J/psi, psi(2S), ... decaying into the mu+ mu- pair. The dilepton invariant-mass dependence of the branching ratio, longitudinal polarization fraction f_L of the \bar{K}^{*0} meson, and forward-backward asymmetry A_{FB} is calculated and compared with data from Belle, CDF and LHCb. It is shown that inclusion of the resonance contribution may considerably modify the branching ratio, calculated in the SM without resonances, even in the invariant-mass region far from the so-called charmonia cuts applied in the experimental analyses. This conclusion crucially depends on values of the unknown phases of the B^0 -> K^{*0} J/psi and B^0 -> K^{*0} psi(2S) decay amplitudes with zero helicity.Comment: 12 pages, 4 figures, SVJour3 style; introduction and discussion sections extended, references added; version accepted for publication in Eur. Phys. J. C. arXiv admin note: substantial text overlap with arXiv:1111.409

    Model-independent extraction of Vtq|V_{tq}| matrix elements from top-quark measurements at hadron colliders

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    Current methods to extract the quark-mixing matrix element Vtb|V_{tb}| from single-top production measurements assume that VtbVtd,Vts|V_{tb}|\gg |V_{td}|, |V_{ts}|: top quarks decay into bb quarks with 100% branching fraction, s-channel single-top production is always accompanied by a bb quark and initial-state contributions from dd and ss quarks in the tt-channel production of single top quarks are neglected. Triggered by a recent measurement of the ratio R=Vtb2Vtd2+Vts2+Vtb2=0.90±0.04R=\frac{|V_{tb}|^{2}}{|V_{td}|^{2}+|V_{ts}|^{2}+|V_{tb}|^{2}}=0.90 \pm 0.04 performed by the D0 collaboration, we consider a Vtb|V_{tb}| extraction method that takes into account non zero d- and s-quark contributions both in production and decay. We propose a strategy that allows to extract consistently and in a model-independent way the quark mixing matrix elements Vtd|V_{td}|, Vts|V_{ts}|, and Vtb|V_{tb}| from the measurement of RR and from single-top measured event yields. As an illustration, we apply our method to the Tevatron data using a CDF analysis of the measured single-top event yield with two jets in the final state one of which is identified as a bb-quark jet. We constrain the Vtq|V_{tq}| matrix elements within a four-generation scenario by combining the results with those obtained from direct measurements in flavor physics and determine the preferred range for the top-quark decay width within different scenarios.Comment: 36 pages, 17 figure

    Analysis of \Lambda_b \rar \Lambda \ell^+ \ell^- transition in SM4 using form factors from Full QCD

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    Using the responsible form factors calculated via full QCD, we analyze the ΛbΛ+\Lambda_{b}\rightarrow \Lambda \ell^{+}\ell^{-} transition in the standard model containing fourth generation quarks (SM4). We discuss effects of the presence of tt' fourth family quark on related observables like branching ratio, forward-backward asymmetry, baryon polarization as well as double lepton polarization asymmetries. We also compare our results with those obtained in the SM as well as with predictions of the SM4 but using form factors calculated within heavy quark effective theory. The obtained results on branching ratio indicate that the ΛbΛ+\Lambda_{b}\rightarrow \Lambda \ell^{+}\ell^{-} transition is more probable in full QCD comparing to the heavy quark effective theory. It is also shown that the results on all considered observables in SM4 deviate considerably from the SM predictions when mt400GeVm_{t'}\geq 400 GeV.Comment: 22 Pages and 21 Figure

    Quantum mechanical effect of path-polarization contextuality for a single photon

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    Using measurements pertaining to a suitable Mach-Zehnder(MZ) type setup, a curious quantum mechanical effect of contextuality between the path and the polarization degrees of freedom of a polarized photon is demonstrated, without using any notion of realism or hidden variables - an effect that holds good for the product as well as the entangled states. This form of experimental context-dependence is manifested in a way such that at \emph{either} of the two exit channels of the MZ setup used, the empirically verifiable \emph{subensemble} statistical properties obtained by an arbitrary polarization measurement depend upon the choice of a commuting(comeasurable) path observable, while this effect disappears for the \emph{whole ensemble} of photons emerging from the two exit channels of the MZ setup.Comment: To be published in IJT

    Study of Bs-> \phi l^+ l^-$ Decay in a Single Universal Extra Dimension

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    Utilizing form factors calculated within the light-cone sum rules, we have evaluated the decay branching ratios of BsϕγB_s\to \phi\gamma and Bsϕ+B_s\to \phi \ell^+\ell^- in a single universal extra dimension model (UED), which is viewed as one of the alternative theories beyond the standard model (SM). For the decay Bsϕ+B_s \to \phi \ell^+\ell^-, the dilepton invariant mass spectra, the forward-backward asymmetry, and double lepton polarization are also calculated. For each case, we compared the obtained results with predictions of the SM. In lower values of the compactification factor 1/R, the only parameter in this model, we see the considerable discrepancy between the UED and SM models. However, when 1/R increases, the results of UED tend to diminish and at 1/R=1000GeV1/R = 1000 \mathrm{GeV}, two models have approximately the same predictions. Compared with data from CDF of Bsϕμ+μB_s \to \phi \mu^+ \mu^-, the 1/R tends to be larger than 350GeV350 \mathrm{GeV}. We also note that the zero crossing point of the forward-backward asymmetry is become smaller, which will be an important plat to prob the contribution from the extra dimension model. The results obtained in this work will be very useful in searching new physics beyond SM. Moreover, the order of magnitude for branching ratios shows a possibility to study these channels at the Large Hadron Collider (LHC), CDF and the future super-B factory.Comment: 13 pages, 16 figure

    Model Independent Analysis of the Forward-Backward Asymmetry for the BK1μ+μB\to K_{1}\mu^{+}\mu^{-} Decay

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    The sensitivity of the zero position of the forward backward asymmetry AFB\mathcal{A}_{FB} for the exclusive BK1(1270)μ+μB\rightarrow K_{1}(1270)\mu^{+}\mu^{-} decay is examined by using most general non-standard 4-fermion interactions. Our analysis shows that the zero position of the forward backward asymmetry is very sensitive to the sign and size of the Wilson coefficients corresponding to the new vector type interactions, which are the counter partners of the usual Standard Model operators but have opposite chirality. In addition to these, the other significant effect comes from the interference of Scalar-Pseudoscalar and Tensor type operators. These results will not only enhance our theoretical understanding about the axial vector mesons but will also serve as a good tool to look for physics beyond the SM.Comment: 14 pages, 8 figures, Published version that appears in EPJ

    Effect of participatory women's groups facilitated by Accredited Social Health Activists on birth outcomes in rural eastern India: A cluster-randomised controlled trial

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    Background: A quarter of the world's neonatal deaths and 15% of maternal deaths happen in India. Few community-based strategies to improve maternal and newborn health have been tested through the country's government-approved Accredited Social Health Activists (ASHAs). We aimed to test the effect of participatory women's groups facilitated by ASHAs on birth outcomes, including neonatal mortality. Methods: In this cluster-randomised controlled trial of a community interve

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    Not AvailableThe investigation aimed to study the impact of capacity building programmes on scientific lac cultivation, processing and uses in terms of knowledge level of farmers. The study was conducted at TOT division, Indian Institute of Natural Resins & Gums (IINRG) Namkum, Ranchi during Nov. 2013 to May 2014. IINRG conducted 17 courses, in which 519 participants were participated; Out of which 125 farmers were randomly selected as respondents for this study. The investigation showed that education, farm size, social participation, lac experiences and sources of information were positively and significantly related to knowledge level of farmers at 5 % level of significance whereas the remaining independent variables viz., age, sex, caste, type of family, family size, occupation and monthly income were not significantly related to knowledge level of farmers on lac cultivation. The percentage changes in knowledge level of respondents towards lac cultivation were found to be 9.60 per cent, 68 per cent and 22.40 per cent, respectively for below average knowledge, average knowledge and above average knowledge after training. . The impact of capacity building programme was gain in knowledge level after training which was significantly higher among farmers for all the lac cultivation practices.Not Availabl
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