نتایج جستجو برای: lambda baryon
تعداد نتایج: 35308 فیلتر نتایج به سال:
Studying the semileptonic decays of charmed particles is prominent in testing standard model particle physics. Motivated by recent experimental progress weak charm baryon sector, we study form factors $\Lambda_c \to \Lambda \ell^+ \nu$ transition on two flavor lattices. We compute two- and three-point functions, extract dimensionless projected correlators, combine them to Weinberg factors. In z...
Abstract CP violation in baryonic decays has not been significantly observed. With large data events accumulated at colliders or the Large Hadron Collider, charmed baryon would provide a promising laboratory to test symmetry. In this study, we formulate {{\Lambda_c^+}}\to\phi p and {{\Lambda_c^+}}\to\omega for measurement of their asymmetry parameters weak BESIII LHCb exp...
We employ the flavor SU(3) symmetry to analyze semileptonic decays of anti-triplet charmed baryons ($\Lambda^{+}_{c},\Xi_{c}^{+,0}$) and find that experimental data on ${\cal B}(\Lambda_c\to\Lambda \ell^+\nu_{\ell})$ implies $\mathcal{B}(\Xi_c^0\to\Xi^-e^+\nu_{e})=(4.10\pm0.46)\%$ $\mathcal{B}(\Xi_c^0\to\Xi^-\mu^+\nu_{\mu})= (3.98\pm0.57)\%$. When this prediction is confronted with recent resul...
A plethora of observational data obtained over the last couple decades has allowed cosmology to enter into a precision era and led foundation standard cosmological constant cold dark matter paradigm, known as $\Lambda$CDM model. Given many possible extensions this concordance model, we present here several novel consistency tests which could be used probe for deviations from $\Lambda$CDM. First...
The pattern speed with which galactic bars rotate is intimately linked to the amount of dark matter in inner regions their host galaxies. In particular, haloes act slow down via torques exerted through dynamical friction. Observational studies barred galaxies tend find that fast, while hydrodynamical cosmological simulations galaxy formation and evolution $\Lambda$CDM framework have previously ...
Local determinations of the Hubble constant $H_0$ favour a higher value than Planck based on CMB and $\Lambda$CDM. Through model-independent expansion, we show that low redshift ($z \lesssim 0.7$) data comprising baryon acoustic oscillations (BAO), cosmic chronometers Type Ia supernovae has preference for Quintessence models lower relative to In addition, confirm an exponential coupling dark ma...
The nature of nucleon resonances is still being debated, while much experimental data are accumulated. In this work, we focus on the negative parity resonance ${N}^{*}(1895)$ which located in scattering region various meson-baryon coupled channels, and such dynamics can be crucial understanding its properties. To test relevance hadron dynamics, investigate decay properties detail. We examine ho...
The Hubble tension that the standard $\Lambda$CDM model is suffering from can be resolved with pre-recombination early dark energy. We present first constraint on tensor-to-scalar ratio $r$ in corresponding Hubble-tension-free cosmologies using most recent BICEP/Keck cosmic microwave background (CMB) B-mode polarization data. find, combining Planck18 CMB and baryon acoustic oscillation data, mo...
We estimate coupling constants for effective Lagrangians of D-meson, charmed, and light baryons from charmed baryon decay processes. First, we calculate widths the processes $$\varLambda _{c} \rightarrow D^{*}N$$ , DN$$ $$\varSigma D N$$ \varDelta $$ D^{*} in Lagrangian method quark model picture with $$^{3}P_{0}$$ model. By employing $$D^{*} \varLambda interaction several literatures, strength...
We perform a systematic study on the local and global spin polarization of $\mathrm{\ensuremath{\Lambda}}$ $\overline{\mathrm{\ensuremath{\Lambda}}}$ hyperons in relativistic heavy-ion collisions at beam energy scan energies via ($3+1$)-dimensional CLVisc hydrodynamics model with multiphase transport (AMPT) simulating many accelerated strongly interacting hadron (SMASH) initial conditions. Foll...
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