hep-ph papers | Gist.Science

System size and event shape dependence of particle-identified balance functions in proton-proton collisions at $\sqrt{s} = 13$ TeV using PYTHIA 8 and EPOS models

This study utilizes PYTHIA 8 and EPOS-LHC models to demonstrate that particle-identified balance functions in 13 TeV proton-proton collisions exhibit distinct dependencies on event multiplicity and spherocity, revealing that while PYTHIA 8 reflects fragmentation-dominated dynamics, EPOS-LHC captures collective effects like radial flow and diffusion that mimic heavy-ion behavior, thereby offering a powerful tool to disentangle hadronization mechanisms and medium-like collectivity in small collision systems.

Subash Chandra Behera, Arvind KhuntiaMon, 09 Ma⚛️ hep-ph

Search for Signatures of Dark Matter Annihilation in the Galactic Center with HAWC

Using 8 years of data from the HAWC Observatory, researchers conducted an indirect search for dark matter annihilation in the Galactic Center across masses from 1 TeV to 10 PeV, finding no significant excess and establishing the first gamma-ray constraints on particles above 100 TeV with upper limits on the annihilation cross section of approximately $10^{-24} $cm$ ^3$/s.

R. Alfaro, C. Alvarez, A. Andrés, E. Anita-Rangel, M. Araya, J. C. Arteaga-Velázquez, D. Avila Rojas, H. A. Ayala Solares, R. Babu, P. Bangale, A. Bernal, K. S. Caballero-Mora, T. Capistrán, A. Carramiñana, F. Carreón, S. Casanova, A. L. Colmenero-Cesar, U. Cotti, J. Cotzomi, S. Coutiño de León, E. De la Fuente, D. Depaoli, P. Desiati, N. Di Lalla, R. Diaz Hernandez, B. L. Dingus, M. A. DuVernois, J. C. Díaz-Vélez, K. Engel, T. Ergin, C. Espinoza, K. Fang, N. Fraija, S. Fraija, J. A. Garcéa-González, F. Garfias, N. Ghosh, H. Goksu, A. Gonzalez Muñoz, M. M. González, J. A. González, J. A. Goodman, S. Groetsch, J. Gyeong, J. P. Harding, S. Hernández-Cadena, I. Herzog, J. Hinton, D. Huang, F. Hueyotl-Zahuantitla, P. Hüntemeyer, A. Iriarte, S. Kaufmann, D. Kieda, A. Lara, K. Leavitt, W. H. Lee, J. Lee, H. León Vargas, J. T. Linnemann, A. L. Longinotti, G. Luis-Raya, K. Malone, O. Martinez, J. Martínez-Castro, H. Martínez-Huerta, J. A. Matthews, J. McEnery, P. Miranda-Romagnoli, P. E. Mirón-Enriquez, J. A. Montes, J. A. Morales-Soto, E. Moreno, M. Mostafá, M. Najafi, A. Nayerhoda, L. Nellen, M. U. Nisa, R. Noriega-Papaqui, N. Omodei, M. Osorio-Archila, E. Ponce, Y. Pérez Araujo, E. G. Pérez-Pérez, C. D. Rho, A. Rodriguez Parra, D. Rosa-González, M. Roth, H. Salazar, D. Salazar-Gallegos, A. Sandoval, M. Schneider, J. Serna-Franco, A. J. Smith, Y. Son, R. W. Springer, O. Tibolla, K. Tollefson, I. Torres, R. Torres-Escobedo, R. Turner, F. Ureña-Mena, E. Varela, L. Villaseñor, X. Wang, Z. Wang, I. J. Watson, H. Wu, S. Yu, S. Yun-Cárcamo, H. Zhou, C. de LeónMon, 09 Ma⚛️ hep-ph

Unified Origin of Dirac Neutrino and Asymmetric Dark Matter Masses via a Dirac-Type Leptogenesis

This paper proposes a unified framework based on an extended $U(1)_X$ Froggatt-Nielsen mechanism and a $\mathbb{Z}_4$ symmetry that simultaneously explains the origins of light Dirac neutrino masses, GeV-scale asymmetric dark matter, and the baryon asymmetry of the Universe through Dirac-type leptogenesis with exact lepton-number conservation.

Megumi Ishida, Hiroshi Ohki, Shohei UemuraMon, 09 Ma⚛️ hep-ph

Trimaximal Mixing Patterns Meet the First JUNO Result

This paper evaluates the impact of the first JUNO experiment results on trimaximal mixing patterns, finding that while renormalization group running can reconcile these models with data for quasi-degenerate neutrino masses, the TM2 pattern is severely constrained or ruled out by neutrinoless double beta decay and KATRIN limits in the Majorana and Dirac cases, respectively.

Di ZhangMon, 09 Ma⚛️ hep-ph

Bimetric MOND as a framework for variable- $G$ theories -- local systems and cosmology

This paper explores extending Bimetric MOND (BIMOND) to create variable- $G$ theories that naturally satisfy local constraints on the constancy of Newton's constant while allowing for a different, enhanced effective gravitational constant ( $G_e$ ) in cosmological settings to potentially explain dark matter effects without new degrees of freedom.

Mordehai MilgromMon, 09 Ma⚛️ hep-ph

Branching fraction of $\Xi_{bc}^+\to \Xi_{c}^+ J/\psi$ in the final-state-interaction approach

This paper predicts the branching fraction of the $\Xi_{bc}^{+}\to \Xi_{c}^{+}J/\psi$ decay to be $(1.55_{-0.42}^{+0.50})\times10^{-4}$ using a final-state-interaction approach calibrated with the $\Lambda_{b}^{0}\to \Lambda^0 J/\psi$ control mode, suggesting that observable signal events are feasible in the near future.

Xiao-Hui Hu, Cai-Ping Jia, Ye Xing, Fu-Sheng YuMon, 09 Ma⚛️ hep-ph

Relation between leading divergences in nonrenormalizable $4D$ supersymmetric theories

Using Slavnov's higher covariant derivative regularization, this paper demonstrates that in a nonrenormalizable ${\cal N}=1$ supersymmetric gauge theory with a quartic superpotential, the leading quadratically divergent correction to the gauge coupling is proportional to the correction of the matter kinetic term, establishing a relation analogous to the exact NSVZ $\beta$ -function.

Ali Lakhal, Konstantin StepanyantzMon, 09 Ma⚛️ hep-ph

Scattering phase shift in quantum mechanics on quantum computers

This paper investigates the feasibility of extracting infinite-volume scattering phase shifts on quantum computers using a one-dimensional trapped system model, demonstrating that while the method yields accurate results with two qubits on IBM hardware, it currently fails with three qubits due to gate operation and thermal relaxation errors.

Peng Guo, Paul LeVan, Frank X. Lee, Yong ZhaoMon, 09 Ma⚛️ quant-ph

An upper limit on cosmological chiral gravitational wave background

This paper derives a model-independent upper limit on the amplitude of a chiral gravitational wave background produced before the electroweak epoch, which, for high reheating temperatures, provides a significantly more stringent constraint than standard big bang nucleosynthesis bounds at frequencies above the MHz scale.

Mohammad Ali Gorji, Ashu Kushwaha, Teruaki SuyamaMon, 09 Ma⚛️ hep-ph

Few-particle lepton bound states in variational approach

This paper calculates the ground-state energy levels and hyperfine structure of three- and four-particle lepton bound states in quantum electrodynamics using a variational method with Gaussian basis functions that accounts for pairwise spin-spin interactions.

A. V. Eskin, A. P. Martynenko, F. A. Martynenko, D. K. PometkoMon, 09 Ma⚛️ hep-ph

VarP-GP: cost-efficient Bayesian emulation of quark-gluon plasma modeling with variable statistical precision

This paper introduces VarP-GP, a cost-efficient Bayesian emulator that leverages variable statistical precision in Monte Carlo simulations to significantly reduce uncertainty in quark-gluon plasma modeling, thereby enabling previously infeasible multi-model calibrations of high-energy nuclear collision data.

R. Ehlers, Y. Ji, P. M. Jacobs, S. MakMon, 09 Ma⚛️ hep-ph

$e^+e^- \to ZH$ at NLO EW matched to a QED parton shower

This paper presents an automated, process-independent NLO-matched QED parton shower method that resolves challenges posed by lepton structure function singularities and provides the first EW NLO+PS predictions for $e^+e^- \to ZH$ production at proposed FCC-ee energies.

Lois Flower, Marek SchönherrMon, 09 Ma⚛️ hep-ph

Strongly interacting singlet scalar dark matter during reheating

This paper demonstrates that a singlet scalar dark matter model operating in the strongly interacting massive particle (SIMP) regime, which is typically ruled out in standard radiation-dominated cosmology due to constraints on mass and couplings, becomes viable during non-standard cosmological eras by allowing for perturbative couplings and satisfying astrophysical bounds.

Geneviève Bélanger, Nicolás Bernal, Alexander PukhovMon, 09 Ma⚛️ hep-ph

Temperature dependence on Spectrum of Heavy Hybrid Mesons

This paper investigates the temperature dependence of conventional and hybrid heavy quarkonium masses by incorporating a thermally screened Debye mass into potential models and solving for mass eigenvalues using a power series expansion method, which shows strong agreement with lattice-QCD-inspired potentials and previous studies.

Ali Zeeshan, Nosheen Akbar, Sadia Arshad, Ali AkgulMon, 09 Ma⚛️ hep-ph

Vacuum Cherenkov Radiation for Nonminimal Isotropic Lorentz Violation

This paper investigates vacuum Cherenkov radiation induced by nonminimal dimension-5 isotropic Lorentz-violating operators in the fermion sector and utilizes ultra-high-energy cosmic ray data to establish stringent constraints on the corresponding quark coefficients.

Albert Yu. Petrov, Marco Schreck, Alexandre R. VieiraMon, 09 Ma⚛️ hep-ph

Pathologies of dimension-zero scalar fields

This paper refutes claims that fourth-order scalar fields can solve the cosmological constant problem or generate primordial density perturbations without inflation, arguing instead that such theories inherently suffer from fatal pathologies including ghost-induced instabilities, unitarity violations, and the generation of a confining fifth force.

James M. Cline, Anamaria HellMon, 09 Ma⚛️ hep-ph

Agentic AI -- Physicist Collaboration in Experimental Particle Physics: A Proof-of-Concept Measurement with LEP Open Data

This paper demonstrates a proof-of-concept where AI agents, directed by expert physicists, independently performed a complete precision measurement of the thrust distribution in LEP ALEPH data, marking a significant step toward integrating AI into the theory-experiment loop to accelerate discoveries in fundamental physics.

Anthony Badea, Yi Chen, Yen-Jie LeeMon, 09 Ma⚛️ hep-ph

Recent progress in antenna subtraction at NNLO and N $^3$ LO

This paper reviews recent advancements in the antenna subtraction method for QCD calculations, highlighting the application of generalized antenna functions at NNLO and presenting the first fully antenna-subtracted N $^3$ LO differential calculation for jet production at electron-positron colliders.

Matteo MarcoliMon, 09 Ma⚛️ hep-ph

Entanglement measures and Bell-type spin-correlation observables in tau-lepton pairs at the Super Tau-Charm Facility

This paper investigates the feasibility of measuring quantum entanglement and Bell-type spin-correlation observables in tau-lepton pairs produced at the proposed Super Tau-Charm Facility, demonstrating that high-statistical-significance resolution of these effects is achievable within the Standard Model framework using realistic detector conditions and integrated luminosities.

Beizhi Yang, Yu Zhang, Zeren Simon Wang, Xiaorong ZhouMon, 09 Ma⚛️ hep-ph

A Lattice QCD study of $p-\Lambda$ scattering in continuum and chiral limits

This paper presents the first systematic lattice QCD study of $I=1/2$ proton- $\Lambda$ scattering across multiple pion masses and lattice spacings, yielding scattering parameters and cross sections that agree with experimental data and confirm attractive interactions critical for nuclear theory and neutron star modeling.

Hang Liu, Liuming Liu, Jin-Xin Tan, Wei Wang, Haobo Yan, Qian-Teng ZhuMon, 09 Ma⚛️ hep-ph

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hep-ph

System size and event shape dependence of particle-identified balance functions in proton-proton collisions at s=13\sqrt{s} = 13s​=13 TeV using PYTHIA 8 and EPOS models