1,240 research outputs found
Form factors and differential distributions in rare radiative leptonic B-decays
We study rare radiative leptonic decays and
within relativistic quark model. In addition to
previous analysis we give the estimations of the branching ratios for four
values of the minimal photon energy, which correspond to photon selection
criteria of the Belle and LHCb detectors. We find out that the branching ratios
only slightly change. The highest values corresponding to are and
. We present the
distribution of the forward-backward asymmetry.Comment: 9 pages, 8 figures, Talk given at XII Quark Confinement and the
Hadron Spectrum, August 29 -- September 3, 2016, Thessaloniki, Greece. arXiv
admin note: substantial text overlap with arXiv:1609.0649
Rare radiative leptonic B-decays
We obtain predictions for and decays. All the contributions containing long-distance QCD
effects are calculated in the framework of relativistic quark model. The
contributions of the light vector-meson resonances related to the virtual
photon emission from valence quarks of the -meson are included. The highest
branching ratios for the radiative leptonic B-decays are and . We also give the distribution of the
foward-backward asymmetry.Comment: 8 pages, 11 figures, talk given at the 19th International Seminar on
High Energy Physics QUARKS-2016, Pushkin, Russia, 29 May - 4 June, 201
Information Model of Cloud App Scaling with Variable Load Peaks
The information model of cloud app was done. It is a formal description of cloud app infrastructure and possible transitions between them, and cloud app current working state classification criterion. Cloud app current state classification criterion on the basis of Page-Hinckley method and calendar of events related to the cloud app working state considers the current state to one of three classes in order to improve the accuracy of prediction of cloud app workload.Proposed criterion was compared with standard offline criterion that analyzes information about the entire time series of cloud app through a considerable time after the events that lead to the load peak, and therefore can\u27t be used when grading in real time. It is shown that the classification of cloud app state is consistent in 92 % of cases.The resulting information model of cloud app scaling with variable load peaks can be used as a component of information technology for cloud app scaling with variable load peaks
Cloud Application Working Mode Classification Criarite
Classification criteria that classifies current working mode of a c loud application with variable load peaks was formed. Introduced criteria allows to differentiate three classes of cloud application states. The criteria is based on Page -Hinkley method and is improved by using a calendar of events that can cause load peak s to increase precision of forecasting of a cloud application state
Family Relationship Hope in Parents of Children with Autism Spectrum Disorder
Parents of children with Autism Spectrum Disorder (ASD) experience unique parenting demands. Although these parents often report high levels of mental health challenges, such as depression (e.g., Scherer et al., 2019), they also report resilience factors such as family support and hope (e.g., Ekas et al., 2016). The present study investigated a novel construct, family relationship hope, in parents of children with ASD by examining the psychometric properties of the Family Relationship Hope Scale (FRHS), variables associated with family relationship hope and its link with depression. Factor analyses examined the factor structure and model fit of the FRHS. The post-crisis phase of the Double ABCX model (McCubbin & Patterson, 1983) provided a framework to conceptualize possible predictors of family relationship hope, through three steps in a hierarchical linear regression. Finally, a logistic regression analysis examined the likelihood of participants having clinically significant depression (Kroenke et al., 2001).
Findings indicated a single factor structure, good model fit and internal reliability for the FRHS. Increased family support and having an adolescent child with ASD predicted higher family relationship hope, and relationship status and age of diagnosis served as important predictors in the model. Finally, family relationship hope significantly predicted the presence of clinically significant depression in parents of children with ASD. Results of the present study offer implications for counselor educators, mental health counselors, policy, and research that may help enhance the lives of families that include a child with ASD
Constraints on the anomalous couplings from -physics experiments
We analyze constraints on the anomalous couplings from -physics
experiments, performing a correlated analysis and allowing all anomalous
couplings to differ simultaneously from their Standard-Model (SM) values. The
-physics observables allow one to probe three linear combinations out of the
four anomalous couplings, which parameterize the vertex under the
assumption that the SM symmetries remain the symmetries of the effective
theory. The constraints in this work are obtained by taking into account the
following -physics observables: the oscillations, the
leptonic decays, the inclusive radiative
decays, and the differential branching fractions in the semileptonic inclusive
and exclusive decays at small
, the momentum of the pair. We find that the SM values of
the anomalous couplings belong to the 95\% CL allowed region obtained this way
but lie beyond the 68\% allowed region. We also report that the distributions
of the anomalous couplings obtained within our scenario differ from the results
of the 1D scenario, when only one of the couplings is allowed to deviate from
its SM value.Comment: 7 pages, extended version. The present analysis involves also
exclusive B-decays resulting in more stringent constraints on the anomalous
coupling
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