11 research outputs found
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Thermal WIMPs and the scale of new physics: global fits of Dirac dark matter effective field theories
We assess the status of a wide class of WIMP dark matter (DM) models in light
of the latest experimental results using the global fitting framework
. We perform a global analysis of effective field theory (EFT)
operators describing the interactions between a gauge-singlet Dirac fermion and
the Standard Model quarks, the gluons and the photon. In this bottom-up
approach, we simultaneously vary the coefficients of 14 such operators up to
dimension 7, along with the DM mass, the scale of new physics and several
nuisance parameters. Our likelihood functions include the latest data from
, direct and indirect detection experiments, and the LHC. For
DM masses below 100 GeV, we find that it is impossible to satisfy all
constraints simultaneously while maintaining EFT validity at LHC energies. For
new physics scales around 1 TeV, our results are influenced by several small
excesses in the LHC data and depend on the prescription that we adopt to ensure
EFT validity. Furthermore, we find large regions of viable parameter space
where the EFT is valid and the relic density can be reproduced, implying that
WIMPs can still account for the DM of the universe while being consistent with
the latest data
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B →ρl ν ¯ and ωl ν ¯ in and beyond the Standard Model: Improved predictions and
We revisit the experimental and theoretical status of B→ρlν¯ and B→ωlν¯ decays. We perform a combined fit of averaged spectra from Belle and BABAR measurements with prior light-cone sum rule calculations in order to obtain more precise predictions over the full q2 range. The extracted values of |Vub| from these combined fits exhibit smaller uncertainty compared to previous extractions from B→ρlν¯ and B→ωlν¯ decays, and the central values are found to be smaller than values extracted from B→πlν¯ or inclusive measurements. We use our fit results to obtain more precise predictions in and beyond the Standard Model for the lepton universality ratios R(ρ) and R(ω), as well as several angular observables that are sensitive to the full q2 distribution, such as the longitudinal polarization of the vector meson, the τ polarization, and its forward-backward asymmetry
Rhodococcus sp. Strain CR-53 LipR, the First Member of a New Bacterial Lipase Family (Family X) Displaying an Unusual Y-Type Oxyanion Hole, Similar to the Candida antarctica Lipase Clan
Predominant Virulent IbA10G2 Subtype of Cryptosporidium hominis in Human Isolates in Barcelona: A Five-Year Study
Allelic sequence variation in the Sub1A, Sub1B and Sub1C genes among diverse rice cultivars and its association with submergence tolerance
ANCUT2, a Thermo-alkaline Cutinase from Aspergillus nidulans and Its Potential Applications
A real-time monitoring platform of myogenesis regulators using double fluorescent labeling
Search for baryon and lepton number violating decays
6 pages, 4 figures, To be submitted in PRD(L)International audienceWe search for the baryon and lepton number violating charm decays, , where is either a or a and is a muon or an electron, using a data sample of collected by the Belle detector at the KEKB asymmetric energy collider. In the absence of significant signals, we set upper limits on the branching fractions in the range at a 90\% confidence level, depending on the decay mode