Thu·Jan 9, 2025Thursday·January 9, 2025

1. 01*

   Probing triple-gauge couplings in anomalous gauge theories at hadron and lepton colliders

   Anibal D. Medina🇦🇷 · Nicolás I. Mileo🇦🇷 · Alejandro Szynkman🇦🇷 · Santiago A. Tanco🇦🇷 · Carlos E. M. Wagner🇺🇸 · Gabriel Zapata🇵🇪

   Gauge anomalous quantum field theories are inconsistent as full UV theories since they lead to the breaking of Lorentz invariance or Unitarity, as well as non-renormalizability. It is well known, however, that they can be interpreted as effective field theories (EFT) with a cut-off. The latter cannot be made arbitrarily large and it is related to the energy scale at which additional fermions with suitable gauge charges enter, rendering the full model anomaly-free. A nondecoupling effect that remains in the EFT is the appearance of anomalous loop-induced triple-gauge couplings, encapsulating information from the full UV theory. In this work we take as an example an Abelian gauge symmetry $U(1{)}_{\mu }^{\prime }$ under which $2^{nd}$-generation leptons are axially charged, leading to an EFT that consists of the Standard Model (SM) with an additional massive $Z^{\prime }$ gauge boson. As a consequence, there are triple gauge couplings involving the $Z^{\prime }$ and Electroweak SM gauge bosons via mixed gauge anomalies. We study the possibility of probing these loop suppressed anomalous couplings at hadron and lepton colliders, with $Z^{\prime }$-lepton couplings allowed by current experimental bounds, finding that due to the large SM backgrounds and small signal, the HL-LHC is incapable of this task. The 100 TeV $pp$ collider at $\mathcal{L}=20{\mathrm{ab}}^{-1}$ on the other hand could probe anomalous couplings for $m_{Z^{\prime }}\in [150,800]\mathrm{GeV}$ and obtain discovery significances for $m_{Z^{\prime }}\in [230,330]\mathrm{GeV}$. Lepton colliders are also well suited for probing these anomalous couplings. In particular we show that a muon collider running at the $Z^{\prime }$-resonance and an electron-positron collider such as CLIC with $\sqrt{s}=3\mathrm{TeV}$ can be complimentary in probing the anomalous couplings for $m_{Z^{\prime }}\in [100,700]\mathrm{GeV}$, with CLIC sensitive to discovery for $m_{Z^{\prime }}\in [125,225]\mathrm{GeV}$.

   hep-phhep-exPRD(2025)·2 citations
2. 02*

   Two-loop form factors for $P$-wave quarkonium production and decay

   Melih A. Ozcelik🇫🇷

   We present the analytical results for the two-loop form factors needed for ${\chi }_{Q,J}$ production and decay. We consider the two-loop corrections to the process $\gamma \gamma \leftrightarrow {}^3{P}_J^{[1]}$, that has been known only numerically before, and the processes $gg\leftrightarrow {}^3{P}_J^{[1]}$, $\gamma g\leftrightarrow {}^3{P}_J^{[8]}$ and $gg\leftrightarrow {}^3{P}_J^{[8]}$, which have not been computed before. We observe that the NRQCD pole structure of the two-loop amplitude in the $gg$ channel is more involved for the spin-triplet $P$-wave case than for the pseudo-scalar $S$-wave case. It involves in addition to the standard Coulomb singularity also a new singularity whose cancellation requires the inclusion of the $gg\leftrightarrow {}^3{S}_1^{[8]}$ form factor. We give the high precision numerical results for the hard functions that can be used to compute ${\chi }_{Q,J}$ production and decay up to NNLO accuracy.

   hep-phnucl-thJHEP(2025)·2 citations
3. 03*

   On the $\theta$-angle physics of QCD under pressure: The strange and isospin phase diagram

   Jahmall Bersini🇯🇵 · Alessandra D'Alise🇮🇹 · Clelia Gambardella🇮🇹 · Francesco Sannino🇮🇹

   We unveil the impact of the $\theta$-angle on the QCD phase diagram at nonzero isospin and strangeness chemical potentials for three light flavors and different quark mass ratios. We establish the phase boundaries as well as the nature of the associated phase transitions. The order parameters and the physical spectrum in the different phases are determined. We further elucidate the physics around $\theta =\pi$ where we discover a novel parity-preserving superfluid phase. Finally, we comment on Dashen's phenomenon in the superfluid phases when varying the number of light flavors.

   hep-phhep-lathep-thnucl-thJHEP(2025)·3 citations
4. 04*

   Coupled channel effects for the bottom-strange mesons

   Wei Hao · M. Atif Sultan · En Wang

   We have calculated the mass spectrum of $B_s$ mesons within a nonrelativistic potential model considering coupled channel effects, and the corresponding strong decay widths within the ${}^3{P}_0$ model using the numerically calculated wave functions. By comparing with the available experimental data, we find that the states $B_s$, $B_s^{\ast }$, $B_{s1}(5830)$, and $B_{s2}^{\ast }(5840)$ could be interpreted as the $B_s(1^1{S}_0)$, $B_s(1^3{S}_1)$, $B_s(1P^{\prime })$, and $B_s(1^3{P}_2)$, respectively. Although the quantum numbers of the newly observed $B_s(6064)$ and $B_s(6158)$ states have not been determined, our results support the assignments of $B_s(1^3{D}_3)$ and $B_s(1^3{D}_1)$ for them. Our predictions are helpful in searching for the bottom-strange meson in future experiments.

   hep-phEPJC(2025)·3 citations
5. 05*

   Testing non-standard neutrino properties

   Manibrata Sen🇩🇪

   Neutrinos provide a compelling avenue to explore physics beyond the Standard Model. This proceeding is a brief summary of a plenary talk given at the 12th Neutrino Oscillation Workshop (NOW2024). We present a discussion on various topics on neutrino non-standard properties, such as the origin of neutrino mass, their decay modes, interaction mechanisms, and a potential connection to dark matter. Constraints and observational results from cosmology, astrophysics, and laboratory experiments are reviewed to illustrate the interplay between neutrino physics and broader questions about the universe.

   hep-phPoS(2025)·0 citations
6. 06*

   Imaginary potential and thermal width in the spinning black hole background from holography

   Zhou-Run Zhu🇨🇳 · Sheng Wang🇨🇳 · Yang-Kang Liu🇨🇳 · Defu Hou🇨🇳

   In this study, we investigate the imaginary potential of heavy quarkonium in the spinning black hole background. Then we estimate the thermal width, which is determined by the imaginary part of the finite temperature potential. In the ultra-local description, the boosted fluid represents a globally rotating fluid. Using a holographic approach, we systematically analyze how boost parameter influences these quantities. Our results reveal that increasing boost parameter causes the imaginary potential to emerge at smaller interquark distances, suggesting that boost parameter accelerates quarkonium melting. Furthermore, we find that boost parameter enhances the thermal width, indicating greater instability of the bound state at higher boost parameter. Notably, we observe that the effect of boost parameter on quarkonium dissociation is more pronounced when the axis of the quark-antiquark pair is transverse to the direction of boost parameter.

   hep-phPRD(2025)·3 citations
7. 07*

   The probability for chiral oscillation of Majorana neutrino in Quantum Field Theory

   Takuya Morozumi🇯🇵 · Tomoharu Tahara🇯🇵

   We derive the probability for chiral oscillation of Majorana neutrinos based on quantum field theory. Since the Hamiltonian under the Majorana mass term does not conserve lepton number, the eigenstates of lepton number change continuously over time. Therefore, the transition amplitude is described by the inner product of the eigenstates of lepton number at the time of the neutrino production and the detection. With the Bogoliubov transformation, we successfully relates the lepton number eigenstates at different times. This method enables us to understand the time variation of lepton number induced by chiral oscillations in terms of transition probabilities. We also present the physical picture that emerges through the Bogoliubov transformation.

   hep-phhep-exhep-thPTEP(2025)·4 citations
8. 08*

   Precision Higgs Constraints in U(1) Extensions of the Standard Model with a Light Z'-Boson

   Zoltán Péli🇭🇺 · Zoltán Trócsányi🇭🇺

   Anomaly free $U(1)$ extensions of the standard model (SM) predict a new neutral gauge boson $Z^{\prime }$. When the $Z^{\prime }$ obtains its mass from the spontaneous breaking of the new $U(1)$ symmetry by a new complex scalar field, the model also predicts a second real scalar $s$ and the searches for the new scalar and the new gauge boson become intertwined. We present the computation of production cross sections and decay widths of such a scalar $s$ in models with a light $Z^{\prime }$ boson, when the decay $h\to Z^{\prime }{Z}^{\prime }$ may have a sizeable branching ratio. We show how Higgs signal strength measurement in this channel can provide stricter exclusion bounds on the parameters of the model than those obtained from the total signal strength for Higgs boson production.

   hep-phUniverse(2025)·0 citations
9. 09*

   Isospin strikes back

   Francesco Rosini🇮🇹 · Simone Pacetti🇮🇹

   Assuming isospin conservation, the decay of a $c\bar{c}$ vector meson into the $\Lambda {\bar{\Sigma }}^0+c.c.$ final state is purely electromagnetic. At the leading order, the $c\bar{c}$ vector meson first converts into a virtual photon that, then produces the $\Lambda {\bar{\Sigma }}^0+c.c.$ final state. Moreover, such a mechanism, i.e., the virtual photon coupling to $\Lambda {\bar{\Sigma }}^0+c.c.$, is the solely intermediate process through which, in Born approximation, the reaction $e^{+}{e}^{-}\to \Lambda {\bar{\Sigma }}^0+c.c.$ does proceed. It follows that any significant difference between the amplitudes of the processes $c\bar{c}\to \Lambda {\bar{\Sigma }}^0+c.c.$ and $e^{+}{e}^{-}\to \Lambda {\bar{\Sigma }}^0+c.c.$ at the $c\bar{c}$ mass must be ascribed to an isospin-violating contribution in the $c\bar{c}$ decay. In Eur. Phys. J. C $80$, 903 (2020) we studied the decay of the $\psi (2S)$ vector meson into $\Lambda {\bar{\Sigma }}^0+c.c.$ and, on the light of the large branching fraction ${\mathrm{BR}}_{18}(\psi (2S)\to \Lambda {\bar{\Sigma }}^0+c.c.)=(1.23\pm 0.24)\times 10^{-5}$, published in the 2018 edition of the Review of Particle Physics Phys. Rev. D $98$, 030001 (2018), we claimed either the presence of a significant isospin-violating contribution or, with a lesser emphasis, a "not complete reliability of the only available datum". In any case, we propose a new measurement. Apparently, our second and considered less serious hypothesis was the right one, indeed the branching fraction published in the 2024 edition of the Review of Particle Physics Phys. Rev. D $110$, 030001 (2024) is $\mathrm{BR}(\psi (2S)\to \Lambda {\bar{\Sigma }}^0+c.c.)=(1.6\pm 0.7)\times 10^{-6}$, more than seven times lower with the error that increased from $\sim 20\%$ to $\sim 45\%$.

   hep-phhep-exnucl-thEPJC(2025)·3 citations
10. 10*

    The Non-Relativistic Limit of Keldysh Spinors

    A. Jourjine🇩🇪

    Keldysh spinors obey Dirac equation, but have the negative of the Dirac action and Hamiltonian. In an example of the U(1) EM coupling, we show that, despite the sign changes, they have a well-defined non-relativistic limit resulting in quantum mechanics with the positive-definite Pauli Hamiltonian. When non-relativistic Dirac and Keldysh fields are brought to interact, we observe curious decoupling of the two fields in mass-like and vector couplings.

    hep-phquant-ph0 citations
11. 11*

    Advancing the phenomenology of GeV-scale axion-like particles

    Maksym Ovchynnikov🇨🇭 · Andrii Zaporozhchenko🇺🇦

    Searches for axion-like particles (ALPs) with masses in the GeV range are a central objective of present and future Intensity Frontier experiments. Interpreting these searches demands a reliable description of ALP production in hadronic collisions and decay. The prescription currently adopted by the community (i) depends on parameters of unphysical chiral rotation used to match gluonic ALP interactions with the interactions in terms of hadronic bound states, (ii) misdescribes the mass scaling of the ALP flux, and neglects mixing with heavy pseudoscalar resonances. We introduce a framework that treats GeV-scale ALP interactions in a chiral-rotation-invariant manner, includes their mixing with heavier excitations $\pi (1300)$, $\eta (1295)$, and $\eta (1440)$, and properly describes their production channels. When applying our description to proton beam experiments, we find that existing bounds and projected sensitivities shift by up to an order of magnitude relative to earlier estimates. We further delineate the dominant theoretical uncertainties, which originate from the still-incomplete experimental knowledge of the spectrum of pseudoscalar excitations.

    hep-phPRD(2025)·29 citations
12. 12*

    Properties of QCD axion in two-flavor color superconductive matter with massive quarks

    Zhao Zhang🇨🇳 · Wenhao Zhao🇨🇳

    We investigate the properties of QCD axion at low temperature and moderate density in the Nambu-Jona-Lasinio model with instanton induced interactions by simultaneously considering the scalar and pseudo-scalar condensates in both quark-antiquark and diquark channels. We derive the analytical dispersion relations of quarks with four-type condensates at nonzero theta angle $\theta =a/f_a$. The axion mass, quartic self-coupling, and the axion potential are calculated in both the chiral symmetry breaking and two-flavor color superconducting phases. Using the commonly adopted model parameters, we find that due to the emergence of color superconductivity, the chiral phase transition not only does not lead to a significant decrease in axion mass and self-coupling, but rather results in an obvious enhancement of them. As a $\theta$ function, the axion potential exhibits an appropriate period of $\pi$, which is quite different from the case without considering the color superconductivity. The surface tension of axion domain wall is also calculated in the presence of color superconductivity.

    hep-phPRD(2025)·5 citations
13. 13*

    Pressure inside hadrons: criticism, conjectures, and all that

    Cédric Lorcé (Ecole Polytechnique, CPHT)🇫🇷 · Peter Schweitzer (Connecticut U.)🇺🇸

    The interpretation of the energy-momentum tensor form factor $D(t)$ of hadrons in terms of pressure and shear force distributions is discussed, concerns raised in the literature are reviewed, and ways to reconcile the concerns with the interpretation are indicated.

    hep-phnucl-thActa Phys.Polon.B(2025)·36 citations
14. 14*

    FeynGame 3.0

    L. Bündgen🇩🇪 · R.V. Harlander🇩🇪 · S.Y. Klein🇩🇪 · M.C. Schaaf🇩🇪

    A major update of the program FeynGame is introduced. One of its main new functionalities is to visualize Feynman graphs generated by QGRAF. The QGRAF output can be either pasted into the FeynGame canvas for individual graphs, or the whole QGRAF output file can be processed. In addition, a number of new features and improvements have been implemented into FeynGame-3.0 in order to further facilitate the efficient drawing of Feynman diagrams in publication quality. FeynGame is freely available as jar or MacOS app file from https://web.physik.rwth-aachen.de/user/harlander/software/feyngame, and as source code from https://gitlab.com/feyngame/FeynGame.

    hep-phhep-exComput.Phys.Commun.(2025)·38 citations
15. 15*

    Dark Matter Ultraviolet Freeze-in in General Reheating Scenarios

    Nicolás Bernal🇦🇪 · Kuldeep Deka🇦🇪 · Marta Losada🇦🇪

    The dynamics of cosmic reheating, that is, on how the energy stored in the inflaton is transferred to the standard model (SM) thermal bath, is largely unknown. In this work, we show that the phenomenology of the nonbaryonic dark matter (DM) ultraviolet freeze-in production strongly depends on the dynamics of the cosmic-reheating era. Using a general parametrization for the Hubble expansion rate and SM temperature, we thoroughly investigate DM production during reheating, not only recovering earlier findings that focused on specific cases, but also exploring alternative scenarios. Additionally, we derive a generalized framework for DM production via inflaton decays and identify the viable parameter space, while simultaneously addressing constraints from CMB observations. As illustrative examples, we explore gravitational DM production through scatterings of SM particles or inflatons, deriving well-defined parameter regions for these scenarios.

    hep-phastro-ph.COhep-thPRD(2025)·17 citations
16. 16*

    Machine Learning Based Top Quark and W Jet Tagging to Hadronic Four-Top Final States Induced by SM as well as BSM Processes

    Jiří Kvita🇨🇿 · Petr Baroň🇨🇿 · Monika Machalová🇨🇿 · Radek Přívara🇨🇿 · Rostislav Vodák🇨🇿 · Jan Tomeček🇨🇿

    We study the application of selected ML techniques to the recognition of a substructure of hadronic final states (jets) and their tagging based on their possible origin in current HEP experiments using simulated events and a parameterized detector simulation. The results are then compared with the cut-based method.

    hep-phhep-ex0 citations
17. 17*

    The Open Relativistic Two-body Problem

    A.V.Koshelkin🇷🇺

    The open relativistic two-body problem, when two interacting particles also are in external potentials, is considered in terms of the principle of the least action. Based on the consistent modification of the relativistic version Newton's third law in external fields, the exact covariant operator equations, which govern dynamics of either a scalar particle or each of the components of the 16 component spinor of spin-$1/2$ fermions, depending on the particle type, are derived in the center-mass and relative motion variables, beyond the consideration in the Breit frame only. The class of external fields and interaction potentials, when the two-body problem can be covariantly reformulated in (3+1) phase space of relative motion variables, uncoupled from the center-mass motion of such a system, is outlined. In the case of fermions the new $\gamma$-matrix basis generating the Dirac-like equation for the 16 component spinors in the (3+1) phase space is found. The chosen basis allows us to decouple the derived Dirac-like equation into four independent equations governing the dynamics of the four-component spinors. The developed approach is examined in studying the low-energy positronium states in magnetic fields.

    hep-phhep-thnucl-thInt.J.Theor.Phys.(2025)·1 citation
18. 18*

    Understanding thermalization in a non-Abelian gauge theory in terms of its soft modes

    Sayak Guin🇮🇳 · Harshit Pandey🇮🇳 · Sayantan Sharma🇮🇳

    We measure the maximal Lyapunov exponent ${\lambda }_L$ of physical states in a SU(2) gauge theory consisting of soft momentum modes both in and out-of-thermal equilibrium conditions using ab-initio lattice techniques. We have implemented different algorithms to appropriately describe the dynamics of soft-modes for a wide range of temperatures and under non-equilibrium conditions. The non-equilibrium state has been realized starting from an over-occupied initial condition for low momentum soft gluons whereas the thermal state comprises of strongly interacting soft gluons at temperatures where these are well separated from the hard momentum modes. Spectra of positive Lyapunov exponents is observed in both these states, similar to a chaotic dynamical system. From the Kolmogorov-Sinai entropy rate measured in terms of this spectrum, we estimate a typical time-scale of $\sim 0.50(3)$ fm/c to achieve thermalization at $T\sim 600$ MeV starting from the non-thermal state. We also measure, for the first time, the ${\lambda }_L$ for long wavelength critical modes of SU(2) using the out-of-time-ordered correlator of a classical $Z_2$ scalar field theory, which shares the same universal behavior with SU(2), near the deconfinement phase transition. The ${\lambda }_L$ is observed to maximize at the transition temperature.

    ↳ hep-lathep-phhep-thnucl-thPLB(2025)·10 citations
19. 19*

    Effective action for relativistic hydrodynamics from Crooks fluctuation theorem

    Nicki Mullins🇺🇸 · Mauricio Hippert🇧🇷 · Jorge Noronha🇺🇸

    A new effective theory framework for fluctuating hydrodynamics in the relativistic regime is derived using standard thermodynamical principles and general properties of non-equilibrium stochastic dynamics. For the first time, we establish clear and concise conditions for ensuring that the resulting effective theories are causal, stable, and well-posed within general relativity. These properties are independent of spacetime foliation and are valid in the full nonlinear regime. Out-of-equilibrium fluctuations are constrained by a relativistically covariant version of Crooks fluctuation theorem, which determines how the entropy production is distributed even when the system is driven by an external force. This leads to an emerging ${\mathbb{Z}}_2$ symmetry responsible for imposing fluctuation-dissipation relations for n-point correlation functions, which matches the standard constraints for the Schwinger-Keldysh effective action.

    ↳ nucl-thhep-phhep-thPRL(2025)·9 citations
20. 20*

    Resistive relativistic magnetohydrodynamics without Amperes Law

    Ruben Lier🇳🇱 · Akash Jain🇳🇱 · Jay Armas🇳🇱 · Oliver Porth🇳🇱

    Resistive magnetohydrodynamics is thought to play a key role in transient astrophysical phenomena such as black hole flares and neutron star magnetospheres. When performing numerical simulations of resistive magnetohydrodynamics, one is faced with the issue that Amperes law becomes stiff in the high conductivity limit which poses challenges to the numerical evolution. We show that using a description of resistive magnetohydrodynamics based on higher form symmetry, one can perform simulations with a generalized dual Faraday tensor without having to use Amperes Law, thereby avoiding the stiffness problem. We also explain the relation of this dual model to a traditional description of resistive magnetohydrodynamics and how causality is guaranteed by introducing second order corrections.

    ↳ astro-ph.HEhep-phhep-thPRD(2025)·6 citations
21. 21*

    Searching for dark matter annihilating into light long-lived mediators from stars inside dwarf spheroidal galaxies

    Aman Gupta🇮🇳 · Pooja Bhattacharjee🇸🇮 · Pratik Majumdar🇮🇳

    Several astrophysical and cosmological observations suggest the existence of dark matter (DM) through its gravitational effects, yet its nature remains elusive. Despite the lack of DM signals from direct detection experiments, efforts continue to focus on the indirect detection of DM from DM-rich astrophysical objects. Dwarf spheroidal galaxies (dSphs) are among the most promising targets for such searches. In this work, we aim to investigate the expected DM capture rate from the stellar component of ten nearby DM-rich dSphs, assuming that the accumulated DM eventually annihilates into light, long-lived mediators (LLLMs) which decay into gamma rays outside the dSphs. We analyze nearly 16 years of {\it Fermi}-LAT data to search for DM annihilation through LLLMs, and, from the observed stacked flux upper limits, set limits on the DM-nucleon scattering cross section for the case of a generic DM scenario. Additionally, we incorporate the Sommerfeld enhancement (SE) effect into the DM annihilation process assuming scalar DM model, and obtain bounds on the DM-nucleon scattering cross section of $\sim 10^{-36}{\mathrm{cm}}^2$ for DM masses around 100 GeV. This allows us to explore an alternative avenue for exploring DM phenomena from dSphs and compare our results with the bounds reported by direct DM detection experiments and other celestial bodies.

    ↳ astro-ph.HEastro-ph.GAhep-phPRD(2025)·4 citations
22. 22*

    Cosmological Perturbations from a New Approach to Inflation

    Brandon Melcher🇺🇸 · Arnab Pradhan🇺🇸 · Scott Watson🇺🇸

    In a previous paper we proposed a new approach to the beginning of inflation -- a lingering universe. The universe begins in a lingering state with a nearly vanishing Hubble parameter. This calls into question the absolute age of the universe, as the Hubble time can be nearly infinite. It also provides promise for addressing the initial singularity of inflation and issues with quantum field theory in de Sitter space-time. Such models arise in classical cosmologies with non-vanishing spatial curvature (inspired by PLANCK 2018 data), and independently by models that arise in string cosmology. In this paper, we consider the importance of cosmological perturbations for the stability of the lingering phase and how this influences cosmological observations. Our goal is to establish observables in this new paradigm for the origin of inflation which is in contrast to eternal inflation and cyclic cosmologies. We also address questions of stability and the transition to inflation.

    ↳ astro-ph.COhep-phhep-thPRD(2025)·4 citations
23. 23*

    Chiral and isospin breaking in the two-flavor Schwinger Model

    David Albandea🇪🇸 · Pilar Hernández🇪🇸

    The Schwinger model with two massive fermions is a nontrivial theory for which no analytical solution is known. The strong coupling limit of the theory allows for different semiclassical approximations to extract properties of its low-lying spectrum. In particular, analytical results exist for the fermion condensate, the fermion mass dependence of the pseudoscalar meson mass or its decay constant. These approximations, nonetheless, are not able to quantitatively predict isospin breaking effects in the light spectrum, for example. In this paper we use lattice simulations to test various analytical predictions, and study isospin breaking effects from nondegenerate quark masses. We also introduce a low-energy effective field theory based on a nonlinear $\sigma$ model with a dilaton field, which leads to the correct fermion mass dependence of the pion mass, the correct $\sigma$-to-$\pi$ mass ratio and a prediction of the isospin breaking effects, which we test numerically.

    ↳ hep-lathep-phPRD(2025)·3 citations
24. 24*

    Lyman Alpha Forest - Halo Cross-Correlations in Effective Field Theory

    Anton Chudaykin🇨🇭 · Mikhail M. Ivanov🇺🇸

    We provide a perturbative effective field theory (EFT) description for anisotropic (redshift-space) correlations between the Lyman alpha forest and a generic biased tracer of matter, which could be represented by quasars, high-redshift galaxies, or dark matter halos. We compute one-loop EFT power spectrum predictions for the combined analysis of the Lyman alpha and biased tracers' data and test them on the publicly available high fidelity Sherwood simulations. We use massive and light dark matter halos at redshift $z=2.8$ as proxies for quasars and high-redshift galaxies, respectively. In both cases, we demonstrate that our EFT model can consistently describe the complete data vector consisting of the Lyman alpha forest auto spectrum, the halo auto spectrum, and the Lyman alpha -- halo cross spectrum. We show that the addition of cross-correlations significantly sharpens constraints on EFT parameters of the Lyman alpha forest and halos. In the combined analysis, our EFT model fits the simulated cross-spectra with a percent level accuracy at $k_{\max }=1h$Mpc${}^{-1}$, which represents a significant improvement over previous analytical models. Thus, our work provides precision theoretical tools for full-shape analyses of Lyman alpha - quasar cross-correlations with ongoing and upcoming spectroscopic surveys.

    ↳ astro-ph.COhep-phPRD(2025)·14 citations

* Reconstructed cohort: no mailing for this day survives in the archive. Papers are grouped by their submission times and arXiv's announcement cut-off, assuming announcement without delay; positions follow identifier order. Validated at ~91% exact-day agreement against the archived era.