132 research outputs found
OL-038 Efficiency of RD-1 antigen-specific interferon-γ release assays (IGRAs) blood-based tests for the diagnosis of Mycobacterium tuberculosis infection in Pott's disease at a tertiary care hospital
A novel therapeutic strategy of lipidated promiscuous peptide against Mycobacterium tuberculosis by eliciting Th1 and Th17 immunity of host
Regardless of the fact that potent drug-regimen is currently available, tuberculosis continues to kill 1.5 million people annually. Tuberculosis patients are not only inflicted by the trauma of disease but they also suffer from the harmful side-effects, immune suppression and drug resistance instigated by prolonged therapy. It is an exigency to introduce radical changes in the existing drug-regime and discover safer and better therapeutic measures. Hence, we designed a novel therapeutic strategy by reinforcing the efficacy of drugs to kill Mtb by concurrently boosting host immunity by L91. L91 is chimera of promiscuous epitope of Acr1 antigen of Mtb and TLR-2 agonist Pam2Cys. The adjunct therapy using drugs and L91 (D-L91) significantly declined the bacterial load in Mtb infected animals. The mechanism involved was through enhancement of IFN-γ+TNF-α+ polyfunctional Th1 cells and IL-17A+IFN-γ+ Th17 cells, enduring memory CD4 T cells and downregulation of PD-1. The down-regulation of PD-1 prevents CD4 T cells from undergoing exhaustion and improves their function against Mtb. Importantly, the immune response observed in animals could be replicated using T cells of tuberculosis patients on drug therapy. In future, D-L91 therapy can invigorate drugs potency to treat tuberculosis patients and reduce the dose and duration of drug-regime
Search for lepton-flavor-violating decays into a lepton and a vector meson using the full Belle data sample
Charged-lepton-flavor-violation is predicted in several new physics
scenarios. We update the analysis of lepton decays into a light charged
lepton ( = or ) and a vector meson ( =
, , , , or ) using 980
fb of data collected with the Belle detector at the KEKB collider. No
significant excess of such signal events is observed, and thus 90% credibility
level upper limits are set on the branching
fractions in the range of (1.7--. These limits are
improved by 30% on average from the previous results.Comment: 19 pages, 5 figures; added one sentence in Acknowledgments; added a
systematic uncertainty about the number of background estimation, and
corrected some sentence
Measurement of the branching fraction of at Belle
Based on a data sample of 983 fb collected with the Belle detector at
the KEKB asymmetric-energy collider, we present the study of the
heavy-flavor-conserving decay with
reconstructed via its decay mode. The
branching fraction ratio is measured
to be . Combing with the world average value of
, the branching fraction
is deduced to be . Here, the uncertainties above are statistical,
systematic, and from , respectively.Comment: 5 pages, 4 figure
Measurement of Angular Coefficients of : Implications for and Tests of Lepton Flavor Universality
We measure the complete set of angular coefficients for exclusive
decays (). Our analysis
uses the full Belle data set with hadronic tag-side
reconstruction. The results allow us to extract the form factors describing the
transition and the Cabibbo-Kobayashi-Maskawa matrix element
. Using recent lattice QCD calculations for the hadronic form
factors, we find using the BGL
parameterization, compatible with determinations from inclusive semileptonic
decays. We search for lepton flavor universality violation as a function of the
hadronic recoil parameter , and investigate the differences of the electron
and muon angular distributions. We find no deviation from Standard Model
expectations
Search for at Belle
We present a search for the decay in the
data sample collected at the
Belle detector, where the is produced in
and decays. We do not observe a signal, and set 90\%
credible upper limits for two different models of the decay processes: if the
decay products are distributed uniformly in phase space, ; if is concentrated near the mass
of the pair in the process ,
Search for with the Semi-leptonic Tagging Method at Belle
We present a search for the lepton-flavor-violating decays , where , using the full data
sample of collected at the resonance with
the Belle detector at the KEKB asymmetric-energy collider. We use
events in which one meson is
reconstructed in a semileptonic decay mode and the other in the signal mode. We
find no evidence for decays and set
upper limits on their branching fractions at confidence level as
and
.
Our result represents the first upper limit on the decay rate.Comment: 14 pages, 5 figures, Submitted to JHE
Two-particle angular correlations in collisions to hadronic final states in two reference coordinates at Belle
We present the analysis of two-particle angular correlations using coordinate
systems defined with the conventional beam axis and the event thrust axis, and
propose the latter to be a useful representation for the correlation structure
interpretation in the collision system. The collisions to
hadronic final states at center-of-mass energies of GeV and
GeV are recorded by the Belle detector at KEKB. In this paper, results
on the first dataset are supplementary to the previous Belle publication
arXiv:2201.01694 while the latter one is the first two-particle correlation
measurement at a collision energy on the resonance and sensitive
to its decay products. Measurements are reported as a function of the
charged-particle multiplicity. Finally, a qualitative understanding of the
correlation structure is discussed using a combination of Monte Carlo
simulations and experimental data.Comment: Submitted to JHEP. 32 pages, 14 figure
Search for the lepton flavour violating decays () at Belle
We present a search for the lepton-flavour-violating decays , with , using the full data sample of pairs recorded by the Belle detector at the KEKB
asymmetric-energy collider. We use events in which one meson is
fully reconstructed in a hadronic decay mode. We find no evidence for decays and set upper limits on their branching fractions
at the 90% confidence level in the - range. The obtained
limits are the world's best results.Comment: 14 pages, 6 figure
Search for charged-lepton flavor violation in () decays at Belle
We report a search for the charged-lepton flavor violation in () decays using a
sample collected by the Belle detector at the KEKB
asymmetric-energy collider. We find no evidence for a signal and set upper
limits on the branching fractions () at 90 confidence level.
We obtain the most stringent upper limits: and .Comment: 11 pages, 3 figures, Submitted to JHE
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