3,771 research outputs found
Novel SM-like Higgs decay into displaced heavy neutrino pairs in U(1)' models
No full textWe examine the observability of heavy neutrino (νh) signatures of a U(1)' enlarged Standard Model (SM) encompassing three heavy Majorana neutrinos alongside the known light neutrino states at the Large Hadron Collider (LHC). We show that heavy neutrinos can be rather long-lived particles producing distinctive displaced vertices that can be accessed in the CERN LHC detectors. We concentrate here on the gluon fusion production mechanism gg -> H1,2 -> νh νh , where H1 is the discovered SM-like Higgs and H2 is a heavier state, yielding displaced leptons following νh decays into weak gauge bosons. Using data collected by the end of the LHC Run 2, these signatures would prove to be accessible with negligibly small background
Revisiting jet clustering algorithms for new Higgs Boson searches in hadronic final states
No full textWe assess the performance of different jet-clustering algorithms, in the presence of different resolution parameters and reconstruction procedures, in resolving fully hadronic final states emerging from the chain decay of the discovered Higgs boson into pairs of new identical Higgs states, the latter in turn decaying into bottom-antibottom quark pairs. We show that, at the large hadron collider (LHC), both the efficiency of selecting the multi-jet final state and the ability to reconstruct from it the masses of the Higgs bosons (potentially) present in an event sample depend strongly on the choice of acceptance cuts, jet-clustering algorithm as well as its settings. Hence, we indicate the optimal choice of the latter for the purpose of establishing such a benchmark Beyond the SM (BSM) signal. We then repeat the exercise for a heavy Higgs boson cascading into two SM-like Higgs states, obtaining similar results
Effect of prenatal cigarette smoke exposure on the architecture of the heart in juvenile Wistar rats
No full textThis study aimed at determining the effects of cigarette smoke exposure during pregnancy on the morphology of the developing heart. Twelve adult female Wistar rats were used for the study. The animals were time mated and grouped into three: a control (A) and two treatment groups (B and C). The treatment groups were exposed to smoke from 2 sticks of cigarette (St. Moritz®) on days 8 – 14 (Group B) and days 15-21 (Group C) of the gestation. Each stick of cigarette contained an average of 0.8375 g of tobacco. The pregnant rats were allowed to litter, and at postnatal day 15, pups from all the groups were sacrificed by cervical dislocation, the chest wall was dissected and the heart was excised and either placed in 10% formal saline fixative for histological preparation using Haematoxylin and eosin staining techniques, or 0.25 M cold sucrose solution and homogenised for enzyme study on the activity of lactate dehydrogenase using the colorimetric method. The pups exposed to cigarette smoke in utero had low birth and body weights, and markedly reduced cardiac weight. Considerable disruptions of the architecture of the heart were also seen, with poorly stained and reduced sizes of cardiac myocytes. Prenatal cigarette smoke exposure impairs the normal development of the heart with subsequent possibility of postnatal suboptimal functionality.Keywords: Gestational cigarette exposure, heart, histology, lactate dehydrogenas
Characterization of the DNA of Candida albicans with regard to content and mode of replication during development
No full textThe dipmorphic yeast Candida albicans was analyzed as to DNA content and the mode of DNA replication during the budding form of growth as opposed to the mycelial form of growth. The primary analytical technique employed in these studies was flow micro-fluorometry (FMF). The FMF studies on clinical and laboratory strains of C. albicans indicated that this organism was diploid and had a genome size equivalent to that of Saccharomyces cerevesiae. These results were confirmed by comparison of the rates of inactivation by mutagenic agents. A series of germ tube negative variants which are non-pathogenic to laboratory animals was also examined using similar techniques. These strains were found to contain 50[percent] of the DNA as compared to the parental strain. These results indicate that the assignment of C. albicans to the fungi imperfecti may be inaccurate. Comparison of the DNA replication patterns to serve as markers of cell cycle progress using the FMF technique indicated that there is distinct variation between the initial replication patterns obtained from the budding form of growth as compared to the mycelial form of growth. These initial patterns were highly synchronous for budding, but diffuse for mycelium formation following release from stationary phase by dilution into fresh medium. These results indicated that mycelium formation was not coupled to DNA synthesis. These results were confirmed using the inhibitor of DNA replication in fungi, hydroxyurea (HU). Once the stimulus to form germ tubes had been supplied, addition of HU did not inhibit germ tube formation.Biology and Biochemistry, Department o
Measurement of Collins asymmetries in inclusive production of charged pion pairs in e+e− annihilation at BABAR
No full textWe present measurements of Collins asymmetries in the inclusive process e+e−→ππX, where π stands for charged pions, at a center-of-mass energy of 10.6 GeV. We use a data sample of 468 fb−1 collected by the BABAR experiment at the PEP-II B factory at SLAC, and consider pairs of charged pions produced in opposite hemispheres of hadronic events. We observe clear asymmetries in the distributions of the azimuthal angles in two distinct reference frames. We study the dependence of the asymmetry on several kinematic variables, finding that it increases with increasing pion momentum and momentum transverse to the analysis axis, and with increasing angle between the thrust and beam axis
Nigerian Journal of Banking and Financial Issues (NJBFI): FOREIGN RESERVES AND MANUFACTURING SECTOR PERFORMANCE IN NIGERIA (1991-2021)
No full textThis study examined the effect of foreign reserve on manufacturing sector performance in Nigeria covering 1991 to 2021. Foreign reserve was proxied with foreign reserve, trade openness, foreign direct investment and exchange rate while manufacturing sector performance, the dependent variable was proxied with manufacturing sector’s contribution to real gross domestic product (RGDP) in Nigeria. Data were sourced from Central Bank of Nigeria (CBN) Statistical Bulletin. The study employed Augmented Dickey-Fuller unit root test for pre-test. The data was analyzed using error correction mechanism (ECM) and Johansen Co-Integration. To determine the residual\u27s normality, the study used post estimation tests such as the Breausch Godfrey serial correlation, the Breausch Pagan Godfrey test, and histogram. The study revealed that all the explanatory variables except exchange rate have a positive relationship with manufacturing sector performance. Specifically, external reserves has an insignificant positive effect on manufacturing sector’s performance with p-value of 0.070 > 0.05 and adjusted R2 of 60%. Consequently, the study concluded that foreign reserve has a positive effect but in significant effect on Nigerian manufacturing sector’s performance. Thus, the study recommended that managers of external reserves should design more positive and progressive measures to continue to stimulate growth of important sectors like manufacturing
Nigerian Journal of Banking and Financial Issues (NJBFI): FOREIGN RESERVES AND MANUFACTURING SECTOR PERFORMANCE IN NIGERIA (1991-2021)
No full textThis study examined the effect of foreign reserve on manufacturing sector performance in Nigeria covering 1991 to 2021. Foreign reserve was proxied with foreign reserve, trade openness, foreign direct investment and exchange rate while manufacturing sector performance, the dependent variable was proxied with manufacturing sector’s contribution to real gross domestic product (RGDP) in Nigeria. Data were sourced from Central Bank of Nigeria (CBN) Statistical Bulletin. The study employed Augmented Dickey-Fuller unit root test for pre-test. The data was analyzed using error correction mechanism (ECM) and Johansen Co-Integration. To determine the residual\u27s normality, the study used post estimation tests such as the Breausch Godfrey serial correlation, the Breausch Pagan Godfrey test, and histogram. The study revealed that all the explanatory variables except exchange rate have a positive relationship with manufacturing sector performance. Specifically, external reserves has an insignificant positive effect on manufacturing sector’s performance with p-value of 0.070 > 0.05 and adjusted R2 of 60%. Consequently, the study concluded that foreign reserve has a positive effect but in significant effect on Nigerian manufacturing sector’s performance. Thus, the study recommended that managers of external reserves should design more positive and progressive measures to continue to stimulate growth of important sectors like manufacturing
Nigerian Journal of Banking and Financial Issues (NJBFI): FOREIGN RESERVES AND MANUFACTURING SECTOR PERFORMANCE IN NIGERIA (1991-2021)
No full textThis study examined the effect of foreign reserve on manufacturing sector performance in Nigeria covering 1991 to 2021. Foreign reserve was proxied with foreign reserve, trade openness, foreign direct investment and exchange rate while manufacturing sector performance, the dependent variable was proxied with manufacturing sector’s contribution to real gross domestic product (RGDP) in Nigeria. Data were sourced from Central Bank of Nigeria (CBN) Statistical Bulletin. The study employed Augmented Dickey-Fuller unit root test for pre-test. The data was analyzed using error correction mechanism (ECM) and Johansen Co-Integration. To determine the residual\u27s normality, the study used post estimation tests such as the Breausch Godfrey serial correlation, the Breausch Pagan Godfrey test, and histogram. The study revealed that all the explanatory variables except exchange rate have a positive relationship with manufacturing sector performance. Specifically, external reserves has an insignificant positive effect on manufacturing sector’s performance with p-value of 0.070 > 0.05 and adjusted R2 of 60%. Consequently, the study concluded that foreign reserve has a positive effect but in significant effect on Nigerian manufacturing sector’s performance. Thus, the study recommended that managers of external reserves should design more positive and progressive measures to continue to stimulate growth of important sectors like manufacturing
Nigerian Journal of Banking and Financial Issues (NJBFI): FOREIGN RESERVES AND MANUFACTURING SECTOR PERFORMANCE IN NIGERIA (1991-2021)
No full textThis study examined the effect of foreign reserve on manufacturing sector performance in Nigeria covering 1991 to 2021. Foreign reserve was proxied with foreign reserve, trade openness, foreign direct investment and exchange rate while manufacturing sector performance, the dependent variable was proxied with manufacturing sector’s contribution to real gross domestic product (RGDP) in Nigeria. Data were sourced from Central Bank of Nigeria (CBN) Statistical Bulletin. The study employed Augmented Dickey-Fuller unit root test for pre-test. The data was analyzed using error correction mechanism (ECM) and Johansen Co-Integration. To determine the residual\u27s normality, the study used post estimation tests such as the Breausch Godfrey serial correlation, the Breausch Pagan Godfrey test, and histogram. The study revealed that all the explanatory variables except exchange rate have a positive relationship with manufacturing sector performance. Specifically, external reserves has an insignificant positive effect on manufacturing sector’s performance with p-value of 0.070 > 0.05 and adjusted R2 of 60%. Consequently, the study concluded that foreign reserve has a positive effect but in significant effect on Nigerian manufacturing sector’s performance. Thus, the study recommended that managers of external reserves should design more positive and progressive measures to continue to stimulate growth of important sectors like manufacturing
Nigerian Journal of Banking and Financial Issues (NJBFI): FOREIGN RESERVES AND MANUFACTURING SECTOR PERFORMANCE IN NIGERIA (1991-2021)
No full textThis study examined the effect of foreign reserve on manufacturing sector performance in Nigeria covering 1991 to 2021. Foreign reserve was proxied with foreign reserve, trade openness, foreign direct investment and exchange rate while manufacturing sector performance, the dependent variable was proxied with manufacturing sector’s contribution to real gross domestic product (RGDP) in Nigeria. Data were sourced from Central Bank of Nigeria (CBN) Statistical Bulletin. The study employed Augmented Dickey-Fuller unit root test for pre-test. The data was analyzed using error correction mechanism (ECM) and Johansen Co-Integration. To determine the residual\u27s normality, the study used post estimation tests such as the Breausch Godfrey serial correlation, the Breausch Pagan Godfrey test, and histogram. The study revealed that all the explanatory variables except exchange rate have a positive relationship with manufacturing sector performance. Specifically, external reserves has an insignificant positive effect on manufacturing sector’s performance with p-value of 0.070 > 0.05 and adjusted R2 of 60%. Consequently, the study concluded that foreign reserve has a positive effect but in significant effect on Nigerian manufacturing sector’s performance. Thus, the study recommended that managers of external reserves should design more positive and progressive measures to continue to stimulate growth of important sectors like manufacturing
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