高能物理 - 唯象学

We investigate the Standard Model (SM) description of the singly Cabibbo-suppressed charm decays $D^0\to \pi^-\pi^+$, $D^0\to K^-K^+$ and $D^0\to K_{\rm S}^0K_{\rm S}^0$. Using factorisation together with isospin symmetry, we constrain…

We present the calculation involving the $qq$, $qq'$ and $qg$ partonic channels contributing to heavy-quark pair production at hadron colliders through next-to-next-to-leading order in QCD using the antenna subtraction formalism. The…

We compare standard fixed-order NLO QCD predictions for the full off-shell $pp \to e^+\nu_e\, \mu^-\bar{\nu}_\mu\, \tau^+\nu_\tau\, b\bar{b} \, (j) + X$ processes in the multi-lepton decay channel with the results obtained using the MiNLO…

Dilepton (Virtual photon) polarization is characterized by anisotropic coefficients $\lambda_{\theta}$, $\lambda_{\phi}$, and $\lambda_{\theta\phi}$, which are expected to be influenced by vorticity and magnetic fields. This work…

The masses of light non-strange mesons can be parameterized as a function of the radial quantum number $n$ and the orbital angular momentum $L$. We perform a comprehensive statistical and phenomenological comparative analysis of competing…

In this work, we propose a new scan tool that automatically calculates maximal cross section predictions for a new physics scenario with additional scalar states. While the tool is currently optimized for asymmetric production and decay…

QCD sum rules are among the most important non-perturbative tools in hadron physics, with the Laplace sum rule (LSR) and moment sum rule (MSR) being the two most commonly used formulations. Despite their widespread application, both…

We examine key features of the eikonal and $U$-matrix unitarization schemes and apply both frameworks to investigate the high-energy behavior of the elastic scattering amplitude, considering input amplitudes whose asymptotic behavior is…

We present a momentum-space framework for the consistent treatment of Coulomb interactions in femtoscopic correlation functions based on a modified Vincent--Phatak method that is more amenable to numerical implementation. The formalism…

Scaling amplitudes describing $pp$ elastic scattering differential cross-sections in the dip-bump region of momentum transfer at the LHC have been recently derived~\cite{scaling}. We check that the same scaling is verified by the $p\bar p$…

We calculated cross sections for $\gamma\gamma \rightarrow \ell^+\ell^-$ ($\ell=e,\mu,\tau$) production in ultraperipheral gold and lead collisions and compare our results with recent measurements from the STAR, ALICE, ATLAS, and CMS…

We apply the soft photon approximation to QED processes in a strong plane-wave laser field. New compact expressions for the emission factors are presented, which simplify the generalization to multiple soft photon emission. The method is…

The dark matter and baryon asymmetry problems remain two of the most pressing questions in fundamental physics. Considering lepton-flavored dark matter, it has recently been shown that the cogenesis of dark matter and the baryon asymmetry…

We establish the multipole structure of the $N \to \Delta$ transition at the level of the generalized parton distributions (GPDs). We decompose the four transition GPDs into one monopole, two dipole, and one quadrupole components in the…

The $S_8$ tension motivates interacting dark energy (IDE), but embedding IDE in UV-complete physics faces severe naturalness challenges. We analyze four symmetry-protected DM--DE portals ( quartic ($\tfrac{1}{2}\lambda\phi^2\chi^2$),…

We present a unified phenomenological analysis of hidden-charm and hidden-bottom mesons, treating the \(c\bar c\) and \(b\bar b\) sectors within a common screened-potential and QCD sum-rule framework. The mass spectra are obtained from a…

The 220~PeV neutrino KM3-230213A, in tension with IceCube and Auger limits unless it is a narrow transient feature, admits a two-body reading: the decay $X \to \nu\bar\nu$ of a relic with $m_X = 4.4\times10^{8}$~GeV. The flux fixes…

Nuclear reactors serve as a key artificial source of light dark matter. Direct detection of reactor-produced dark matter faces substantial obstacles, since quenching effects suppress conventional elastic scattering signals below detector…

We show that primordial quark pellets (PQP), ultra dense quark matter mini-stars formed at around 1 TeV, naturally arise in a radiation dominated universe if rare baryon overdensities are produced by collapsing Peccei-Quinn domain walls or…

Systematic investigations of four series of Regge trajectories for quadruply heavy pentaquarks are still lacking. Using the diquark and triquark Regge trajectory relations, we propose the Regge trajectory relations for the quadruply heavy…