meson decay
Heavy-Meson Decay Constants: QCD Sum-Rule Glance at Isospin Breaking
... some decay constant and its systematic uncertainty ...heavy-meson decay constants in related studies [4, 5] based on cutting-edge QCD contributions ...heavy-meson decay constants [4, 8, ...
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Meson decay constants from Nf=2 clover fermions
... We present recent results for meson decay constants calculated on configurations with two flavours of O(a)-improved Wilson fermions. Non-perturbative renormalisation is applied and quark mass dependencies ...
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Hybrid meson decay from the lattice
... hybrid meson to (QQ ¯ )(qq¯) are also possible since there is enough excitation energy to create a light quark ...This meson must be created in a flavor singlet state and the lightest candidates are , ...
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Strong Isospin Breaking in Heavy-Meson Decay Constants: Employing Borelized QCD Sum Rules in Local-Duality Limit
... Abstract. Applying the QCD sum-rule machinery in the so-called local-duality shape to heavy–light mesons reveals that, as a consequence of the non-zero mass gap between up and down quarks, the leptonic decay ...
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B and D meson decay constants in lattice QCD
... We present in Tables III–X results for the decay constants obtained with various fitting methods. We give two tables for each of the four decay constants. The first table contains results for each of the ...
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Meson decay studies from MAMI A2
... Meson transition form factors (TFFs) describe the interaction between mesons and two real or virtual photons. Hence, they provide a unique tool to study the electromagnetic structure of the mesons. TFFs of light ...
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A study of the fully differential inclusive semileptonic B meson decay rate
... The existence of antiquark states means that particle-antiparticle pairs can be produced by the electromagnetic and strong interactions. In the experiment discussed in this thesis, bottom quark pairs are produced via the ...
182
Dark Forces at KLOE/KLOE-2
... scale; (ii) cross sections for most of the inter- esting processes involving dark matter at e + e − colliders scale with 1/s , this means a factor of 100 with respect to B factories, almost compen- sating the loss in ...
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η production off the proton in a chiral quark approach
... With the helicity amplitudes of photon transition and meson decay we can obtain the CGLN am- plitudes of each resonances also. We find the results is same as those obtained by the method in the previous ...
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A tmQCD mixed-action approach to flavour physics
... Abstract. We discuss a mixed-action approach in which sea quarks are regularised using non-perturbatively O(a) improved Wilson fermions, while a fully-twisted tmQCD action is used for valence quarks. In this setup, ...
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Dark Forces at DAΦNE
... the signal efficiency (15–25%), the dark Higgsstrahlung cross section and the branching fraction of the U → μ + μ − decay [31]. Results were then combined by taking into account the different integrated luminosities, ...
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A pseudoscalar glueball and charmed mesons in the extended linear sigma model
... antiquark mesons, L μν ≡ ∂ μ L ν − ∂ ν L μ , and R μν ≡ ∂ μ R ν − ∂ ν R μ are the left-handed and right-handed field strength tensors which describe the (axial-)vector mesons. In eLSM Lagrangian (1) the dots refer to ...
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Measurement of the Bc +meson lifetime using Bc +→J/ψμ+νμX decays
... Fig. 8 Effect of a generic deformation of the signal model: a offset to the lifetime value (expressed in fs) as a function of the deforma- tion parameters; b fit projection for the M J /ψ μ variable in the detached ...
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The eta and eta' mesons in QCD
... Using local meson operators, we obtain for x the values in Table 2. The largest t value has least contributions from excited state contamination and the consistency of the results versus t suggests that such ...
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Investigation of the low-energy kaons hadronic interactions in light nuclei by AMADEUS
... The investigation of the negatively charged kaons interactions in nuclear matter is performed through the reconstruction of hyperon-pion and hyperon-nucleon / nucleus correlated pairs productions, fol- lowing the K − ...
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Exotic baryons as a hadronic molecule in the heavy quark region
... pentaquarks, such as the compact pentaquark [2–5] and the hadronic molecule [6–14]. On the other hand, the threshold enhancement by the anomalous triangle singularity is discussed in Refs. [16–18]. Hadronic molecules are ...
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Search for nucleon decay into charged antilepton plus meson in 0.316 megaton . years exposure of the Super-Kamiokande water Cherenkov detector
... The meson-nucleon interactions in an oxygen nucleus are simulated with the NEUT neutrino interaction simulation ...nucleon decay in a nucleus is determined by the Woods-Saxon nuclear density distribution in ...
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COMPASS: meson spectroscopy and low-energy meson dynamics
... free decay of kaon beam component, are in principle applicable, however have not yet been established for reactions with neutral particles in the final state as needed ...
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Analysis of BaBar data for three meson tau decay modes using the Tauola generator
... Publication by BaBar collaboration of the one-dimensional distributions for the π − π − π + mode [11] allows us to compare the RChT predicted spectra and modify the corresponding hadronic current to describe the ...
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Measurement of the direct CP violating charge asymmetry in B±→μ±νμD0 Decays
... The mean proper decay lengths of b hadrons are fixed in the simulation to values close to, but not exactly equal to, the current world-average values [11]. To correct for these differences, an event weighting is ...
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