高能物理 - 唯象学
We investigate the implications of the interactions between ultralight dark matter (ULDM) and the Standard model particles for the effective self-interaction coupling constants of ULDM. Our analysis shows that one-loop quantum corrections…
We demonstrate that approximating the Earth's density profile with a single path averaged value instead of the spatially resolved Preliminary Reference Earth Model PREM generates a joint parameter degeneracy in the $(\delta_{\text{CP}},…
We study the vacuum decay of a Lorentz-violating photon into a neutrino-antineutrino pair. Lorentz-violating corrections to the photon dispersion relation are parametrized through an effective invariant mass…
The conventional strong $CP$ problem arises from the apparent tension between the existence of a $CP$-violating $\theta$ term in the conventional topological formulation of QCD and the experimental constraint that the corresponding…
We compute the fermion-photon vertex in QED in the presence of a constant and uniform magnetic background up to one-loop order. We show that even at tree-level, the vertex is modified due to the loss of Lorentz invariance induced by the…
Extra-dimensional QCD axion is well motivated by string compactifications and enjoys enhanced protection against quality-violating effects. If present during inflation, however, its quantum fluctuations generate isocurvature perturbations…
We present a comprehensive global analysis of strong first-order electroweak phase transitions (SFOEWPTs) and their associated stochastic gravitational-wave (GW) backgrounds within the Normal Scenario of the $CP$-conserving…
The global electroweak fit tests the quantum structure of the Standard Model by confronting precision measurements with high-order theoretical predictions. This paper presents an updated Gfitter analysis using the latest experimental…
We investigate nearside energy-energy correlators (EECs) at small angles, explicitly incorporating the QCD scaling behavior in both the perturbative and post-confinement regimes through a Mellin-transform framework. As an illustration, we…
We explore the sensitivity of a future FCC-ee to multi-TeV new physics (NP) that can generate vector, scalar and tensor flavor-changing (FC) $eetu_k$ contact interactions ($u_k=u,c$ for $k=1,2$), probed via single top-quark production, $e^+…
The established $d=5$ ALP effective Lagrangian describes the interaction of scalars with approximate shift-symmetry which carry no Standard Model (SM) charges with SM fields. It implicitly assumes that ALPs are not charged under any…
We propose a method for detecting an ambient density of heavy, electrically-charged particles. Such particles would impact the Earth, lose energy in terrestrial matter, and become trapped. We study the accumulation of these rare particles…
The Earth's interior at depths exceeding present direct probing limit, which is just one five-hundredth of its radius, remains unknown to a significant extent due to existing ambiguities in predicting the distribution of temperature,…
We present the first calculation of the $B \to D_1(2420)$ and $B \to D'_1(2430)$ transition form factors at ${\cal O}(\alpha_s)$ using light-cone sum rules within the framework of soft-collinear effective theory (SCET). We first match the…
In this work we consider the production of a top-antitop pair at the LHC when the mass of the pair is relatively near to the nominal threshold, that is to say to twice the top pole mass. In this regime, enhanced perturbative corrections…
We present an updated data-driven analysis of short- vs. long-distance dynamics in $B\to K^{*}\mu^+\mu^-$. The analysis is based on the recent LHCb measurement of the full angular distribution of this process, taking advantage of the…
We explore the diquark-diquark-antiquark type $sssc\bar{c}$ pentaquark states with the isospin-spin-parity $IJ^{P}=0{\frac{1}{2}}^-$, $0{\frac{3}{2}}^-$ and $0{\frac{5}{2}}^-$ via the QCD sum rules in details and obtain the ground state…
Parameters of the fully-beauty tensor tetraquark $ T=bb\overline{b}\overline{b}$ are computed using QCD sum rule method. The mass $m$ and coupling $\Lambda$ of this state are evaluated by means of two-point sum rule approach. Prediction…
Searches for new physics continue at the LHC in several forms, including new-particle searches, precision measurements of SM couplings, and searches for signals of new invisible particles. In this talk, we discuss the reach in parameter…
We study the effects of the running of the QCD coupling on the anti-collinear resummation in JIMWLK evolution in the linear (BFKL) regime. We determine the appropriate scale choice for the coupling entering the JIMWLK kernel, and derive the…