A series of pulsar timing arrays (PTAs) recently observed gravitational waves at the nanohertz frequencies. Motivated by this remarkable result, we present a novel class Pati-Salam models that give rise to network metastable cosmic strings, offering plausible explanation for PTA data. Additionally, introduce hybrid inflationary scenario eliminate magnetic monopoles arise during subsequent phase transitions from symmetry Standard Model gauge group. The resulting scalar spectral index is...

Lattice quantum chromodynamics (QCD) calculations share a defining challenge by requiring small finite range of spatial separation <a:math xmlns:a="http://www.w3.org/1998/Math/MathML" display="inline"><a:mi>z</a:mi></a:math> between quark/gluon bilinears for controllable power corrections in the perturbative QCD factorization, and large hadron boost <c:math xmlns:c="http://www.w3.org/1998/Math/MathML" display="inline"><c:msub><c:mi>p</c:mi><c:mi>z</c:mi></c:msub></c:math> successful...

In this paper, we propose a new possible connection between dark matter relic density and baryon asymmetry of the universe. The portal standard model sector not only controls detections matter, but also allows to trigger first order electroweak phase transition. We discuss systematically scalar candidates, starting from real singlet arbitrary high representations. show that simplest realization is provided by doublet, strong first-order transition implies lower bound on direct detection...

The CDF Collaboration at Fermilab has recently reported a new precision measurement of the $W$ boson mass showing substantial $7\ensuremath{\sigma}$ deviation from Standard Model prediction. Moreover, confirmed longstanding tension in $(g\ensuremath{-}2{)}_{\ensuremath{\mu}}$ measurement. We propose unified solution to these deviations within simplest radiative neutrino model; Zee model. Our analysis establishes nontrivial links between origin mass, anomaly, and shift while being consistent...

The Zee-Babu model is a minimal realization of radiative neutrino mass generation mechanism at the two-loop level. We study phenomenology this future multi-TeV muon colliders. After imposing all theoretical and low-energy experimental constraints on parameters, we find that states are expected not to reside below TeV scale, making it challenging probe them LHC. first analyze production rates for various channels, including multi singly charged and/or doubly scalars For concreteness, several...

We investigate the prospects of probing doubly-charged scalars minimal Left-Right Symmetric model (MLRSM) at a muon collider. assess its capability by studying production and their subsequent decay into four charged lepton final states containing same-charge pairs. find that channels with electron pairs, i.e., (e±e±μ∓μ∓ charge conjugated pairs), have largest sensitivity due to lowest Standard Model background. Besides, we show possibility using fully polarized initial beams in collider can...

We present the quantum simulation of frustrated spin-<a:math xmlns:a="http://www.w3.org/1998/Math/MathML"><a:mfrac><a:mn>1</a:mn><a:mn>2</a:mn></a:mfrac></a:math> antiferromagnetic Heisenberg spin chain with competing nearest-neighbor <b:math xmlns:b="http://www.w3.org/1998/Math/MathML"><b:mrow><b:mo>(</b:mo><b:msub><b:mi>J</b:mi><b:mn>1</b:mn></b:msub><b:mo>)</b:mo></b:mrow></b:math> and next-nearest-neighbor <c:math...

The extension of the standard model's minimal Higgs sector with an inert SU(2)L scalar doublet can provide light dark matter candidate and simultaneously induce a strong phase transition for explaining Baryogenesis. There is however no symmetry reasons to prevent using scalars higher representations. By making random scans over models' parameters, we show that in electroweak physics constraints, first order possibility having sub-TeV cold representations are rather disfavored compared...

Very recently, a substantial $7\sigma$ deviation of the $W$-boson mass from Standard Model (SM) prediction has been reported by CDF collaboration. Furthermore, Muon g-2 Experiment recently confirmed longstanding tension in $(g-2)_\mu$. Besides, updated result LHCb collaboration found evidence for breaking lepton universality beauty-quark decays, which shows $3.1\sigma$ discrepancy and is consistent with their previous measurements. Motivated several these drawbacks SM, this work, we propose...

The mystery of dark matter remains an unsettled problem particle physics. On top that, experiments show a persistent contention the muon anomalous magnetic moment (AMM) relative to Standard Model (SM) prediction. In this work, we consider possibility extending SM with non-Abelian gauge symmetry $SU(2)_X$, under which leptons transform non-trivially. receive corrections their AMMs right order via one-loop processes mediated by beyond (BSM) fermions required cancel anomalies, and BSM bosons...

The CDF collaboration at Fermilab has recently reported a new precision measurement of the $W$~boson mass showing substantial $7σ$ deviation from Standard Model prediction. Moreover, confirmed longstanding tension in $(g-2)_μ$ measurement. We propose unified solution to these deviations within simplest radiative neutrino model: Zee model. Our analysis establishes non-trivial links between origin mass, anomaly, and shift while being consistent with lepton flavor violation all other...

In this work we investigate the sphaleron solution in a SU(2) × U(1) X gauge theory, which also encompasses Standard Model, with higher scalar representation(s) (J (i) , (i)). We show that field profiles describing multiplet, have similar trends like doublet case respect to radial distance. compute energy and find it scales linearly vacuum expectation value of its slope depends on representation. effect is small for physical mixing angle, θ W resembles doublet. For representations, criterion...

In this work, we consider a class of dark matter (DM) models where the DM does not directly interact with Standard Model (SM) particles at tree-level. Therefore, coannihilation mechanism is crucial in achieving correct relic abundance, which turn requires coannihilating partner to be close mass actual particle. our systematisation models' class, mediator and are assumed charged under QCD interactions. This last feature calls for scrutiny non-perturbative effects, namely Sommerfeld factors...

We investigate the lepton flavor violation (LFV) in inert scalar model with higher representations. generalize doublet right handed neutrino by using and fermion representation of $SU(2)_{L}$. As generalized have same parameter space, we compare rates $\mu\rightarrow e\gamma$, ee\overline{e}$ $\mu-e$ conversion nuclei its immediate extension, quartet model. show that corresponding are larger case compared to Inert for region space. This implies such extended models more constrained current...

The origin of neutrino mass is a mystery, so its nature, namely, whether neutrinos are Dirac or Majorana particles. On top that, hints large deviations the muon and electron anomalous magnetic moments (AMMs) strong evidence for physics beyond Standard Model. In this work, piecing these puzzles together, we propose class radiative models to reconcile $(g-2)_{\mu,e}$ anomalies with oscillation data. framework, common set new (NP) states run through loops that generate non-zero and, due chiral...

We investigate the Sommerfeld enhancement (SE) in generalized scotogenic model with large electroweak multiplets. focus on scalar dark matter (DM) candidate of and compare DM annihilation cross sections to WW, ZZ, γγ γZ at present day galactic halo for doublet its immediate generalization, quartet their respective viable regions parameter space. find that larger multiplet has sizable enhanced section compared because it is more likely be constrained by current H.E.S.S. results future CTA...

We investigate the charged lepton flavor violating processes $\ensuremath{\mu}\ensuremath{\rightarrow}e\ensuremath{\gamma}$, $\ensuremath{\mu}\ensuremath{\rightarrow}ee\overline{e}$, and $\ensuremath{\mu}\ensuremath{-}e$ conversion in nuclei for a class of three-loop radiative neutrino mass generation models with electroweak multiplets increasing order. find that, because certain cancellations among various one-loop diagrams which give dipole nondipole contributions an effective...

We study various properties of a Proca field coupled to gravity through minimal and quadrupole interactions, described by two-parameter family Lagrangians. St\"uckelberg decomposition the effective theory spells out its model-dependent ultraviolet cutoff, parametrically larger than mass. present pp-wave solutions that model admits, consider linear fluctuations on such backgrounds, thereby constrain parameter space requiring null-energy condition absence negative time delays in high-energy...

The addition of a Higgs quadruplet to the standard model (SM) quarks and leptons would shift <a:math xmlns:a="http://www.w3.org/1998/Math/MathML" display="inline"><a:mi>W</a:mi></a:math>-boson mass upward. It could also facilitate production dark matter through conventional thermal freeze-out scenario via Yukawa interaction with or freeze-in from decay SM Higgs. We investigate same-sign lepton smoking gun signature double-charged scalar component at LHC. Published by American Physical Society 2024

Very recently, a substantial $7σ$ deviation of the $W$-boson mass from Standard Model (SM) prediction has been reported by CDF collaboration. Furthermore, Muon g-2 Experiment recently confirmed longstanding tension in $(g-2)_μ$. Besides, updated result LHCb collaboration found evidence for breaking lepton universality beauty-quark decays, which shows $3.1σ$ discrepancy and is consistent with their previous measurements. Motivated several these drawbacks SM, this work, we propose model...

Quantum simulation has become a promising avenue of research that allows one to simulate and gain insight into the models High Energy Physics whose experimental realizations are either complicated or inaccessible with current technology. We demonstrate quantum such model, mechanical system spatial noncommutativity, which is inspired by works in Noncommutative Geometry Field theory for universal computer. use novel group theoretical formalism map Hamiltonian noncommutative ordinary then carry...

We present the Sommerfeld enhanced Dark Matter (DM) annihilation into gamma ray for a class of three-loop radiative neutrino mass models with large electroweak multiplets where DM is in O(TeV) range. show that this model, rate becomes more prominent larger and it already within reach currently operating Imaging Atmospheric Cherenkov telescopes (IACTs), High Energy Stereoscopic System (H.E.S.S.). Furthermore, Telescope Array (CTA), which will begin 2030, improve sensitivity by factor...