Zobrazeno 1 - 10
of 51 679
pro vyhledávání: '"A Meissner"'
Autor:
Vonk, Thomas, Meißner, Ulf-G.
We analyze the large-$N_c$ structure of the baryon-baryon potential derived in the framework of SU(3) chiral perturbation theory up to next-to-leading order including contact interactions as well as one-meson and two-meson exchange diagrams. Moreover
Externí odkaz:
http://arxiv.org/abs/2412.13677
We employ vacuum-to-$B$ meson correlation functions with interpolating currents $\bar{q}'\slashed{n}q$ and $\bar{q}'\slashed{n}\gamma_{\perp}q$ to construct light-cone sum rules (LCSR) for calculating the $B\to K^*$ form factors in the large recoil r
Externí odkaz:
http://arxiv.org/abs/2412.13084
We review the status of baryon form factors with a special focus on the nucleon electromagnetic form factors which are known best. First, we give an introduction into the dispersive analyses and emphasize the role of unitarity and analyticity in the
Externí odkaz:
http://arxiv.org/abs/2412.12885
Autor:
Azizi, Majid, Soleymaninia, Maryam, Hashamipour, Hadi, Salajegheh, Maral, Khanpour, Hamzeh, Meißner, Ulf-G.
We present new parton distribution functions (PDFs) at next-to-leading order (NLO) and next-to-next-to-leading order (NNLO) in perturbative QCD, derived from a comprehensive global QCD analysis of high-precision data sets from combined HERA deep-inel
Externí odkaz:
http://arxiv.org/abs/2412.10727
We study the properties of the $X(1880)$, the structure around the $\bar{p}p$ threshold that appears in the $3(\pi^+\pi^-)$ invariant mass spectrum in the decay process of $J/\psi \to \gamma 3(\pi^+\pi^-)$. Nucleon-antinucleon rescattering is taken i
Externí odkaz:
http://arxiv.org/abs/2412.07599
We review recent experimental and theoretical results for the electromagnetic form factors of hyperons (Y) in the timelike region, accessible in the reactions $e^+e^-\to \bar YY$. Specifically, we focus on the final states $\bar \Lambda\Lambda$, $\ba
Externí odkaz:
http://arxiv.org/abs/2412.07543
We work out the spatial density distributions corresponding to the axial-vector charge density operator for spin-1/2 systems using states described by sharply localized wave packets in arbitrary Lorentz-frames. The static approximation, leading to th
Externí odkaz:
http://arxiv.org/abs/2412.05050
The proton-rich nucleus $^{22}$Si is studied using Nuclear Lattice Effective Field Theory with high-fidelity chiral forces. Our results indicate that $^{22}$Si is more tightly bound than $^{20}$Mg, thereby excluding the possibility of two-proton emis
Externí odkaz:
http://arxiv.org/abs/2411.17462
Molecular Dynamics (MD) simulations are a powerful tool for studying matter at the atomic scale. However, to simulate solids, an initial atomic structure is crucial for the successful execution of MD simulations, but can be difficult to prepare due t
Externí odkaz:
http://arxiv.org/abs/2411.17348
Quanto options allow the buyer to exchange the foreign currency payoff into the domestic currency at a fixed exchange rate. We investigate quanto options with multiple underlying assets valued in different foreign currencies each with a different str
Externí odkaz:
http://arxiv.org/abs/2411.16617