نتایج جستجو برای: lambda baryon

تعداد نتایج: 35308  

Journal: :The European Physical Journal A 2021

In this article, we construct the six-quark currents with $$J^P=0^+$$ , $$0^-$$ $$1^+$$ and $$1^-$$ to study $$\Lambda _c$$ dibaryon $${\bar{\Lambda }}_c$$ baryonium states via QCD sum rules. We consider vacuum condensates up dimension 16 truncation of order $${\mathcal {O}}(\alpha _s^k )$$ $$k\le 3$$ . The predicted masses are $$5.11_{-0.12}^{+0.15}$$ GeV, $$4.66_{-0.06}^{+0.10}$$ $$4.99_{-0.0...

1998
Kevork Abazajian

We investigate the effects of baryon/anti-baryon inhomogeneity on primordial nucleosynthesis. Recent work claims that electroweak baryogenesis could give rise to distinct regions of net baryon and anti-baryon number, which could survive until the nucleosynthesis epoch. We discuss neutron diffusion effects on nucleosynthesis yields in these models and speculate on the prospects for obtaining con...

Journal: :Nuclear Physics B 2022

The discovery of three pentaquark peaks -- the $P_c(4312)$, $P_c(4440)$ and $P_c(4457)$ by LHCb collaboration has a series interesting consequences for hadron spectroscopy. If these hidden-charm objects are indeed hadronic molecules, as suspected, they will be constrained heavy-flavor SU(3)-flavor symmetries. combination two symmetries imply existence five-flavor pentaquarks with quark content ...

Journal: :Monthly Notices of the Royal Astronomical Society 2022

We use updated Hubble parameter and baryon acoustic oscillation data, as well other lower-redshift Type Ia supernova, Mg II reverberation-measured quasar, quasar angular size, H starburst galaxy, Amati-correlated gamma-ray burst to jointly constrain cosmological parameters in six models. The joint analysis provides model-independent determinations of the constant, $H_0=69.7\pm1.2$ $\rm{km \ s^{...

Journal: :Physical review 2021

In prerecombination resolutions of the Hubble tension, such as early dark energy, new physics before recombination shifts values relevant cosmological parameters so that models can fit with cosmic microwave background and baryon acoustic oscillations observations well $\Lambda$CDM does. this paper, we clarify how parameter are related $\delta H_0$, particularly find shift primordial scalar spec...

ژورنال: تحقیقات موتور 2020

In recent decades, rising greenhouse gas emissions have become a major challenge and concern. Environmental pollution is one of the greatest human challenges of the 21st century. Improving the performance of internal combustion engines and reducing the amount of pollutant emissions has always been a concern for researchers. The use of alternative fuels and the control and adjustment of the lamb...

For any lacunary sequence $theta = (k_{r})$, we define the concepts of $S_{theta}-$limit point and $S_{theta}-$cluster point of a sequence of fuzzy numbers $X = (X_{k})$. We introduce the new sets  $Lambda^{F}_{S_{theta}}(X)$, $Gamma^{F}_{S_{theta}}(X)$ and prove some inclusion relaions between these and the sets $Lambda^{F}_{S}(X)$, $Gamma^{F}_{S}(X)$ introduced in ~cite{Ayt:Slpsfn} by Aytar [...

Journal: :Physical review 2022

A refined investigation on light flavor meson-baryon scatterings is performed using a dynamical coupled-channel approach, the J\"ulich-Bonn model, that respects unitarity and analyticity constraints. The channel space of $\ensuremath{\pi}N$, $\ensuremath{\pi}\mathrm{\ensuremath{\Delta}}$, $\ensuremath{\sigma}N$, $\ensuremath{\rho}N$, $\ensuremath{\eta}N$, $K\mathrm{\ensuremath{\Lambda}}$, $K\ma...

Journal: :Journal of Cosmology and Astroparticle Physics 2022

We reconstruct the Cosmic Microwave Background (CMB) lensing potential on latest Planck CMB PR4 (NPIPE) maps, which include slightly more data than 2018 PR3 release, and implement quadratic estimators using optimal filtering. increase reconstruction signal to noise by almost $20\%$, constraining amplitude of CMB-marginalized power spectrum in units best-fit $1.004 \pm 0.024$ ($68\%$ limits), is...

Journal: :Physical review 2022

The semi-inclusive electroproduction of exotic hadrons, including the $T_{cc}$, $P_{cs}$, and hidden-charm baryon-antibaryon states, is explored under assumption that they are $S$-wave hadronic molecules a pair charmed hadrons. We employ Monte Carlo event generator Pythia to produce hadron pairs then bind them together form molecules. With use such production mechanism, rates estimated at order...

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