Fri·Oct 14, 2022Friday·October 14, 2022

1. 01*

   Quantum partonic transport in QCD matter

   João Barata🇺🇸 · Andrey V. Sadofyev🇪🇸 · Xin-Nian Wang🇺🇸

   We study gradient corrections to the transport equation for energetic light partons in dense QCD environments. In the diffusion limit, the transport dynamics is solely controlled by small-angle elastic scatterings, leading to transverse momentum broadening with respect to the parton's initial direction. Such a parton propagation is usually considered in the limit of transversely homogeneous matter. The transport processes admit a classical description and the transverse spatial dependence of the medium properties emerges only through the jet quenching parameter. In this work, we show that a gradient expansion of the all-order evolution equation for the partonic Wigner function leads to an evolution equation in the Boltzmann-diffusion form only up to the leading order in transverse gradients. At the second order in gradients, the quantum corrections associated with non-local interactions give rise to a novel transport that can be implemented in Monte Carlo simulations. In addition, using our results, we compute the gradient corrections to the jet quenching parameter in inhomogeneous matter.

   hep-phnucl-thPRD(2023)·34 citations
2. 02*

   Dijet azimuthal correlations in p-p and p-Pb collisions at forward LHC calorimeters

   M. Abdullah Al-Mashad🇪🇬 · A. van Hameren🇵🇱 · H. Kakkad🇵🇱 · P. Kotko🇵🇱 · K. Kutak🇵🇱 · P. van Mechelen🇧🇪 · S. Sapeta🇵🇱

   We present a state-of-the-art computation for the production of forward dijets in proton-proton and proton-lead collisions at the LHC, in rapidity domains covered by the ATLAS calorimeter and the planned FoCal extension of the ALICE detector. We use the small-x improved TMD (ITMD) formalism, together with collinearly improved TMD gluon distributions and full b-space Sudakov resummation, and discuss nonperturbative corrections due to hadronization and showers using the Pythia event generator. We observe that forward dijets in proton-nucleus collisions at moderately low pT are excellent probes of saturation effects, as the Sudakov resummation does not alter the suppression of the cross section.

   hep-phhep-exJHEP(2022)·24 citations
3. 03*

   Richness out of smallness: a Possible Staged Blueprint on Future Colliders

   Meng Lu🇨🇳 · Qiang Li🇨🇳 · Zhengyun You🇨🇳 · Ce Zhang (for the PKU SYSU Novel Collider Group)🇨🇳

   Novel collision methods and rich phenomena are crucial to keeping high-energy collision physics more robust and attractive. In this document, we present a staged blueprint for future high-energy colliders: from neutrino-neutrino collision, neutrino-lepton collision to electron-muon and muon-muon collisions. Neutrino beam from TeV scale muons is a good candidate to enrich high-energy collision programs and can serve as a practical step toward a high-energy muon collider, which still requires tens of years of R&D. Neutrinos-neutrinos collision provides a promising way to probe heavy Majorana neutrinos and effective neutrino mass; neutrino and antineutrino annihilation into Z boson has a huge cross-section at 10K pb level; leptons-neutrinos collision benefits W boson mass precision measurements. With only a minimal amount of integrated luminosity, one can envision the ``Richness out of smallness''. This document summarizes the current status and the roadmap towards the muon-muon collider with less challenging techniques required through intermediate facilities, where a wide variety of physics goals could be achieved. A (preparatory) laboratory on novel colliders could attract vast international interests and collaborations.

   hep-phhep-exphysics.acc-ph4 citations
4. 04*

   Radiative decays of the neutral $Z_c(3900)$ and $Z_c(4020)$

   Xiao-Yun Wang🇨🇳 · Gang Li🇨🇳 · Chun-Sheng An🇨🇳 · Ju-Jun Xie🇨🇳

   We study the radiative decays $Z_c(3900)/Z_c(4020)\to \gamma {\chi }_{cJ}(\gamma {\chi }_{cJ}^{\prime })$ ($J=0,1,2$), with the assumption that the $Z_c(3900)$ and $Z_c(4020)$ couple strongly to $D{\bar{D}}^{\ast }+c.c$ and $D^{\ast }{\bar{D}}^{\ast }$ channel, respectively. By considering the contributions of intermediate charmed mesons triangle loops within an effective Lagrangian approach, it is shown that the calculated partial widths of $Z_c(3900)\to \gamma {\chi }_{cJ}$ are about a few hundreds keVs, while the obtained partial widths $Z_c(4020)\to \gamma {\chi }_{cJ}$ are about tens of keVs. The predicted partial widths of $Z_c(3900)\to \gamma {\chi }_{c0,1}^{\prime }$ are less than 1 keV, which mainly due to the very small phase space. For $Z_c(4020)\to \gamma {\chi }_{c0,2}^{\prime }$, the calculated partial widths are usually smaller than 1 keV. For the $Z_c(4020)\to \gamma {\chi }_{c1}^{\prime }$ process, the obtained partial widths can reach up to the order of 10 keV. Furthermore, the dependence of these ratios between different decay modes on the masses of $Z_c(3900)$ or $Z_c(4020)$ are also investigated, which may be a good quantity for the experiments. It is hoped that these calculations here could be tested by future experiments.

   hep-phPRD(2022)·7 citations
5. 05*

   Astrophysical searches of ultralight particles

   Tanmay Kumar Poddar🇮🇳

   The Standard Model of particle physics is a $SU(3{)}_c\times SU(2{)}_L\times U(1{)}_Y$ gauge theory that can explain the strong, weak, and electromagnetic interactions between the particles. The gravitational interaction is described by Einstein's General Relativity theory which is a classical theory of gravity. These theories can explain all the four fundamental forces of nature with great level of accuracy. However, there are several theoretical and experimental motivations of studying physics beyond the Standard Model of particle physics and Einstein's General Relativity theory. Probing these new physics scenarios with ultralight particles has its own importance as they can be a promising candidates for dark matter that can evade the constraints from dark matter direct detection experiments and solve the small scale structure problems of the universe. In this paper, we have considered axions and gauge bosons as light particles and their possible searches through astrophysical observations. In particular, we obtain constraints on ultralight axions from orbital period loss of compact binary systems, gravitational light bending, and Shapiro time delay. We also derive constraints on ultralight gauge bosons from indirect evidence of gravitational waves, and perihelion precession of planets. Such type of observations can also constrain several particle physics models and are discussed.

   hep-phastro-ph.COgr-qcPoS(2022)·1 citation
6. 06*

   $\text{RGESolver}$ : a $\text{C++}$ library to perform Renormalization Group evolution in the Standard Model Effective Theory

   Stefano Di Noi🇮🇹 · Luca Silvestrini🇮🇹

   Renormalization group evolution above the electroweak scale is a crucial ingredient in the phenomenology of the Standard Model Effective Theory. The RGESolver open-source C++ library performs the evolution at leading order for dimension-six operators in the most general flavour scenario (assuming lepton and baryon number conservation). Given its efficiency, RGESolver can be used to include the effects of renormalization group evolution in extensive phenomenological analyses in the framework of the Standard Model Effective Theory.

   hep-phEPJC(2023)·44 citations
7. 07*

   Heavy quarks structure functions $F_2^{q\bar{q}}(x,Q^2)$ and $F_L^{q\bar{q}}(x,Q^2)$ at the NLO approximation

   S. Zarrin🇮🇷 · S. Dadfar🇮🇷

   We provide compact formulas for the heavy quarks structure functions $F_2^{q\bar{q}}(x,Q^2)$ and $F_L^{q\bar{q}}(x,Q^2)$, with $q=c,b$ and $t$, in $e^{-}p$ interaction with respect to the behavior of the gluon density at the next-to-leading order (NLO) approximation and present ratios $R^{q\bar{q}}=F_L^{q\bar{q}}/F_2^{q\bar{q}}$ for these quarks. To do this, we obtain a fitted form of the heavy quark coefficient functions for deep-inelastic lepton-hadron scattering at a wide range of $Q^2$ values. The obtained numerical results are compared with experimental data from HERA and with the results from the KLN model and the MSTW2008 predictions.

   hep-phPRD(2022)·4 citations
8. 08*

   All Order Merging of High Energy and Soft Collinear Resummation

   Jeppe R. Andersen🇬🇧 · Hitham Hassan🇬🇧 · Sebastian Jaskiewicz🇬🇧

   We present a method of merging the exclusive LO-matched high energy resummation of High Energy Jets (HEJ) with the parton shower of Pythia which preserves the accuracy of the LO cross sections and the logarithmic accuracy of both resummation schemes across all of phase space. Predictions produced with this merging prescription are presented with comparisons to data from experimental studies and suggestions are made for further observables and experimental cuts which highlight the importance of both high energy and soft-collinear effects.

   hep-phSciPost Phys.Proc.(2024)·2 citations
9. 09*

   Anomalous coupling studies with intact protons at the LHC

   C. Royon🇺🇸

   We describe the reaches on quartic $\gamma \gamma \gamma \gamma$, $\gamma \gamma WW$, $\gamma \gamma ZZ$, $\gamma \gamma \gamma Z$, $\gamma \gamma t\bar{t}$ anomalous couplings at the LHC using intact protons in the final state measured in AFP in ATLAS or PPS in CMS-TOTEM.

   hep-phhep-exSciPost Phys.Proc.(2024)·2 citations
10. 10*

    Photon splitting corrections to soft-photon resummation

    Lois Flower🇬🇧 · Marek Schoenherr🇬🇧

    In this paper we present an algorithm to add photon-splitting corrections to the Yennie-Frautschi-Suura-style soft-photon resummation available in the Sherpa Monte-Carlo event generator. Photon-splitting corrections enter at NNLO in QED and, as these effects are not incorporated in the standard QED FSR resummations, their size is larger than the pure hard photon-emission corrections at the same order. We introduce different lepton dressing strategies which incorporate further leptons and hadrons in addition to the customary photons, and discuss their sensitivity to dressing parameters such as the cone size. Finally, we quantify the effects of photon splittings into charged fermions and scalars under different such dressing strategies on $Z\to e^{+}{e}^{-}$ decays and find effects of up to 1% for suitably inclusive dressing strategies independent of the dressing cone size, and up to 9% if only photons are used in the dressing procedure with large dressing cones.

    hep-phJHEP(2023)·12 citations
11. 11*

    Precision QCD corrections to gluon-initiated diphoton-plus-jet production at the LHC

    Ryan Moodie🇬🇧

    In this thesis, we present recent advances at the precision frontier of higher-order quantum chromodynamics (QCD) calculations. We consider massless two-loop five-point amplitudes, with a particular focus on diphoton-plus-jet production through gluon fusion. We build a library of infrared functions up to at most next-to-next-to-leading order (NNLO) in QCD, which can be used to validate amplitudes and construct counterterms in subtraction schemes at NNLO. We review progress in the novel use of machine learning technology to optimise the evaluation of amplitudes in hadron collider simulations. We present the full-colour virtual QCD corrections to diphoton-plus-jet production through gluon fusion, discussing the new techniques developed to calculate these non-planar two-loop amplitudes. We use these amplitudes to compute the next-to-leading QCD corrections to the differential cross sections of diphoton-plus-jet production through gluon fusion at the Large Hadron Collider. We also present the leading-colour double-virtual corrections to hadronic trijet production. All derived amplitudes are made available in a public implementation that is ready for further phenomenological application.

    hep-phcs.LG2 citations
12. 12*

    The Radiative Flavor Template at the LHC: Lepton non-universality and g-2

    Giacomo Cacciapaglia🇫🇷 · Antimo Cagnotta🇮🇹 · Roberta Calabrese🇮🇹 · Francesco Carnevali🇮🇹 · Agostino De Iorio🇮🇹 · Alberto Orso Maria Iorio🇮🇹 · Stefano Morisi🇮🇹 · Francesco Sannino🇮🇹

    The Standard Model of Particle Physics and its description of Nature have been recently challenged by a series of precision measurements performed via different accelerator machines. Statistically significant anomalies emerged in the heavy meson physics sector, when measuring the muon magnetic momentum, and very recently when deducing the mass of the W boson. Here we consider a radiative extension of the Standard Model devised to be sufficiently versatile to reconcile the various experimental results while further predicting the existence of new bosons and fermions with a mass spectrum in the TeV energy scale. The resulting spectrum is, therefore, within the energy reach of the proton-proton collisions at the LHC experiments at CERN. The model investigated here allows to interpolate between composite and elementary extensions of the Standard Model with emphasis on a new modified Yukawa sector that is needed to accommodate the anomalies. Focusing on the radiative regime of the model, we introduce interesting search channels of immediate impact for the ATLAS and CMS experimental programs such as the associate production of Standard Model particles with either invisible or long-lived particles. We further show how to adapt earlier SUSY-motivated searchers of new physics to constrain the spectrum and couplings of the new scalars and fermions. Overall, the new physics template simultaneously accounts for the bulk of the observed experimental anomalies while suggesting a wide spectrum of experimental signatures relevant for the current LHC experiments.

    hep-phhep-exPRD(2023)·2 citations
13. 13*

    Automated NLO SM corrections for all colliders

    Pia Bredt🇩🇪 · Jürgen Reuter🇩🇪 · Pascal Stienemeier🇩🇪

    We summarize the status of automated NLO SM corrections for hadron and lepton collider processes in the multi-purpose event generator WHIZARD. The focus will be on NLO EW and QCD-EW mixed corrections at the LHC. Also, recent progress on the inclusion of EW corrections in future lepton collider processes and on the POWHEG-matched event generation in the NLO automated setup will be discussed.

    hep-phhep-exPoS(2022)·4 citations
14. 14*

    Resolving puzzle in ${\Xi }_c^0\to {\Xi }^{-}{e}^{+}{\nu }_e$ with ${\Xi }_c-{\Xi }_c^{\prime }$ mixing

    Chao-Qiang Geng🇨🇳 · Xiang-Nan Jin🇨🇳 · Chia-Wei Liu🇨🇳

    We study the ratio of $R=2\Gamma ({\Xi }_c^0\to {\Xi }^{-}{e}^{+}{\nu }_e)/3\Gamma ({\Lambda }_c^{+}\to \Lambda e^{+}{\nu }_e)$, which is found to be $R=1(0.8)$ from the exact (broken) $SU(3)$ flavor symmetry, in sharp contrast to the average value of $R_{av}=0.59\pm 0.10$ from the ALICE collaboration and lattice QCD results. We propose to use the mixing of ${\Xi }_c-{\Xi }_c^{\prime }$ to resolve the puzzle. With the model-independent mass relations, we find that the mixing angle is $|{\theta }_c|=0.137(5)\pi$, which suppresses ${\Xi }_c\to \Xi e^{+}{\nu }_e$ about $20\%$ model-independently, resulting in $R\approx 0.6$ with the $SU(3)$ flavor breaking effect. We explicitly demonstrate that $R=0.70\pm 0.09$ from the bag model, which is also consistent with $R_{av}$. To test the mixing mechanism, we recommend the experiments to measure the decays of ${\Xi }_c\to {\Xi }^{\prime }(1530)e^{+}{\nu }_e$, whose branching fractions are determined to be $(4.4\sim 8.7)\times 10^{-3}$ and $(1.3\sim 2.6)\%$ for ${\Xi }_c^0$ and ${\Xi }_c^{+}$, respectively, but vanish without the mixing. In addition, nonvanishing values of $\mathcal{B}({\Xi }_c^{+}\to {\Xi }^{\prime 0}(1530){\pi }^{+})$ and $\mathcal{B}({\Xi }_c^{+}\to {\Sigma }^{\prime +}(1530){\overline{K}}^0)$ will also be evidences of the mixing based on the Köner-Pati-Woo theorem, which are calculated as $(3.8\sim 7.5)\times 10^{-3}$ and $(6.6\sim 13)\times 10^{-4}$, respectively. We emphasize that ${\theta }_c$ is sizable and should be given serious considerations in future studies on the heavy baryon systems.

    hep-phhep-exPLB(2023)·18 citations
15. 15*

    Neutral current B-decay anomalies

    T. Hurth🇩🇪 · F. Mahmoudi🇫🇷 · D. Martinez Santos🇪🇸 · S. Neshatpour🇮🇹

    We discuss the implications of $b\to s{\ell }^{+}{\ell }^{-}$ measurements and their deviations with respect to the Standard Model predictions in a model-independent framework. We highlight in particular the impact of the recent updated measurements including the updated $B_s\to \varphi {\mu }^{+}{\mu }^{-}$ branching ratios and angular observables, the recent CMS measurement of the branching ratio of $B_s\to {\mu }^{+}{\mu }^{-}$, and the LHCb measured lepton flavour universality violating ratios $R_{K_S^0}$ and $R_{K^{\ast +}}$. In addition, we check the compatibility of the new physics effect for the theoretically clean observables with the rest of the neutral $B$ decays observables.

    hep-phSpringer Proc.Phys.(2023)·15 citations
16. 16*

    A $\nu$ Approach to Analyzing Neutrino Data in the $\mathbf{R}$-Parity-Violating MSSM

    Herbi K. Dreiner🇩🇪 · Dominik Köhler🇩🇪 · Saurabh Nangia🇩🇪

    The $R$-parity-violating Minimal Supersymmetric Standard Model (RPV-MSSM) can naturally accommodate massive neutrinos as required by the oscillation data. However, studying the phenomenology is complicated due to the large number of undetermined parameters involved. Thus, studies are usually restricted to specific submodels. In this work, we develop an approach that allows us to be less restrictive. Working in (almost) the completely general RPV-MSSM setting, we analyze the structure of the neutrino mass matrix, and identify -- for the case of two massive neutrinos -- only four minimal classes of structures that can solve the neutrino data; we call these Minimal Oscillation Models (MOMs). We study the general features of each MOM class, and present numerical fits to the oscillation data. Our approach allows us to study all RPV models satisfying the neutrino data in a unified manner, as long as they satisfy the MOM criteria. Through several examples, we show that this indeed holds for many interesting scenarios.

    hep-phEPJC(2023)·4 citations
17. 17*

    Bump Morphology of the CMAGIC Diagram

    L. Aldoroty🇺🇸 · L. Wang🇨🇳 · P. Hoeflich🇺🇸 · J. Yang🇺🇸 · N. Suntzeff🇺🇸 · G. Aldering🇺🇸 · P. Antilogus🇫🇷 · C. Aragon🇺🇸 · S. Bailey🇺🇸 · C. Baltay🇺🇸 · S. Bongard🇫🇷 · K. Boone🇺🇸 and 29 other authors

    We apply the color-magnitude intercept calibration method (CMAGIC) to the Nearby Supernova Factory SNe Ia spectrophotometric dataset. The currently existing CMAGIC parameters are the slope and intercept of a straight line fit to the first linear region in the color-magnitude diagram, which occurs over a span of approximately 30 days after maximum brightness. We define a new parameter, ${\omega }_{XY}$, the size of the ``bump'' feature near maximum brightness for arbitrary filters $X$ and $Y$. We find a significant correlation between the slope of the first linear region, ${\beta }_{XY,1}$, in the CMAGIC diagram and ${\omega }_{XY}$. These results may be used to our advantage, as they are less affected by extinction than parameters defined as a function of time. Additionally, ${\omega }_{XY}$ is computed independently of templates. We find that current empirical templates are successful at reproducing the features described in this work, particularly SALT3, which correctly exhibits the negative correlation between slope and bump size seen in our data. In 1-D simulations, we show that the correlation between the size of the bump feature and ${\beta }_{XY,1}$ can be understood as a result of chemical mixing due to large-scale Rayleigh-Taylor instabilities.

    ↳ astro-ph.SRhep-phApJ(2023)·2 citations
18. 18*

    Evidence of a signature of planet formation processes from solar neutrino fluxes

    Masanobu Kunitomo🇯🇵 · Tristan Guillot🇫🇷 · Gaël Buldgen🇨🇭

    Solar evolutionary models are thus far unable to reproduce spectroscopic, helioseismic, and neutrino constraints consistently, resulting in the so-called solar modeling problem. In parallel, planet formation models predict that the evolving composition of the protosolar disk and, thus, of the gas accreted by the proto-Sun must have been variable. We show that solar evolutionary models that include a realistic planet formation scenario lead to an increased core metallicity of up to 5%, implying that accurate neutrino flux measurements are sensitive to the initial stages of the formation of the Solar System. Models with homogeneous accretion match neutrino constraints to no better than 2.7$\sigma$. In contrast, accretion with a variable composition due to planet formation processes, leading to metal-poor accretion of the last $\sim$4% of the young Sun's total mass, yields solar models within 1.3$\sigma$ of all neutrino constraints. We thus demonstrate that in addition to increased opacities at the base of the convective envelope, the formation history of the Solar System constitutes a key element in resolving the current crisis of solar models.

    ↳ astro-ph.SRastro-ph.EPhep-phAstron.Astrophys.(2022)·12 citations
19. 19*

    Density matrix formalism for interacting quantum fields

    Christian Käding🇦🇹 · Mario Pitschmann🇦🇹

    We provide a description of interacting quantum fields in terms of density matrices for any occupation numbers in Fock space in a momentum basis. As a simple example, we focus on a real scalar field interacting with another real scalar field, and present a practicable formalism for directly computing the density matrix elements of the combined scalar-scalar system. For deriving the main formula, we use techniques from non-equilibrium quantum field theory like thermo field dynamics and the Schwinger-Keldysh formalism. Our results allow for studies of particle creation/annihilation processes at finite times and other non-equilibrium processes including those found in the theory of open quantum systems.

    ↳ hep-thhep-phquant-phUniverse(2022)·16 citations
20. 20*

    Wilson Lines and Boundary Operators of BCFW Shifts

    Rijun Huang🇨🇳 · Qingjun Jin🇨🇳 · Yi Li🇨🇳

    Boundary operators are gauge invariant operators whose form factors correspond to boundary contributions of BCFW shifts. In gauge theory, the boundary operators contain infinite series, which are constrained by gauge symmetry. We compute the boundary operators of all possible BCFW shifts in Yang-Mills theory and QCD, and show that the infinite series can be elegantly organized into Wilson lines, which are natural building blocks for non-local gauge invariant operators. We comment on their connection to jet functions and gauge invariant off-shell amplitudes. We also verify our results by studying various BCFW shifts of four and five-point amplitudes.

    ↳ hep-thhep-phJHEP(2022)·2 citations
21. 21*

    Super-horizon resonant magnetogenesis during inflation

    Misao Sasaki🇯🇵 · Valeri Vardanyan🇯🇵 · Vicharit Yingcharoenrat🇯🇵

    We propose a novel mechanism for significantly enhancing the amplitude of primordial electromagnetic fields during inflation. Similar to existing proposals, our idea is based on parametric resonance effects due to conformal-symmetry-breaking coupling of a gauge field and the inflaton. Our proposed scenario, however, significantly differs from previously studied models, and avoids their shortcomings. We, particularly, construct a viable system where the gauge field is exponentially amplified on super-horizon scales, therefore evading the no-go theorem formulated on the basis of widely encountered drastic back-reaction of the magnetic field energy on the inflationary background. We argue that in order for the resonant scenario to work with a bounded and positive-definite coupling function, a mass term for the gauge sector is required. We compute the spectrum of the produced magnetic fields and demonstrate the compatibility with current observational constraints. We demonstrate that while the magnetic fields do not noticeably back-react on the inflationary background, the non-zero mass term can contribute significantly to the total energy-momentum tensor. We point out the parameter space where the latter issue is absent.

    ↳ astro-ph.COgr-qchep-phPRD(2023)·6 citations
22. 22*

    Conformal model for gravitational waves and dark matter: A status update

    Maciej Kierkla🇵🇱 · Alexandros Karam🇪🇪 · Bogumila Swiezewska🇵🇱

    We present an updated analysis of the first-order phase transition associated with symmetry breaking in the early Universe in a classically scale-invariant model extended with a new SU(2) gauge group. Including recent developments in understanding supercooled phase transitions, we compute all of its characteristics and significantly constrain the parameter space. We then predict gravitational wave spectra generated during this phase transition and by computing the signal-to-noise ratio we conclude that this model is well testable (and falsifiable) with LISA. We also provide predictions for the relic dark matter abundance. It is consistent with observations in a rather narrow part of the parameter space, since we exclude the so-called supercool dark matter scenario based on an improved description of percolation and reheating after the phase transition as well as inclusion of the running of couplings. Finally, we devote attention to renormalisation-scale dependence of the results. Even though our main results are obtained with the use of renormalisation-group improved effective potential, we also perform a fixed-scale analysis which proves that the dependence on the scale is not only qualitative but also quantitative.

    ↳ astro-ph.COhep-phhep-thJHEP(2023)·100 citations
23. 23*

    Solar System-scale interferometry on fast radio bursts could measure cosmic distances with sub-percent precision

    Kyle Boone🇺🇸 · Matthew McQuinn🇺🇸

    The light from a source at a distance d will arrive at detectors separated by 100 AU at times that differ by as much as 120 (d/100 Mpc)^{-1} nanoseconds because of the curvature of the wavefront. At gigahertz frequencies, the arrival time difference can be determined to better than a nanosecond with interferometry. If the space-time positions of the detectors are known to a few centimeters, comparable to the accuracy to which very long baseline interferometry baselines and global navigation satellite systems (GNSS) geolocations are constrained, nanosecond timing would allow competitive cosmological constraints. We show that a four-detector constellation at Solar radii of >10 AU could measure distances to individual sources with sub-percent precision and, hence, cosmological parameters such as the Hubble constant to this precision. The precision increases quadratically with baseline length. FRBs are the only known bright extragalactic radio source that are sufficiently point-like. Galactic scattering limits the timing precision at <3 GHz, whereas at higher frequencies the precision is set by removing dispersion. Furthermore, for baselines greater than 100 AU, Shapiro time delays limit the precision, but their effect can be cleaned with two additional detectors. Accelerations that result in ~1 cm uncertainty in detector positions (from variations in the Sun's irradiance, dust collisions and gaseous drag) could be corrected for with weekly GNSS-like trilaterations. Gravitational accelerations from asteroids occur over longer timescales, and so a setup with a precise accelerometer and calibrating the detector positions off of distant FRBs may also be sufficient. The proposed interferometer would also resolve the radio emission region of Galactic pulsars, constrain the mass distribution in the outer Solar System, and reach interesting sensitivities to ~0.01-100 micro-Hz gravitational waves.

    ↳ astro-ph.COgr-qchep-phphysics.space-phApJL(2023)·9 citations
24. 24*

    Probing the interaction between dark energy and dark matter with future fast radio burst observations

    Ze-Wei Zhao🇨🇳 · Ling-Feng Wang🇨🇳 · Ji-Guo Zhang · Jing-Fei Zhang🇨🇳 · Xin Zhang🇨🇳

    Interacting dark energy (IDE) scenario assumes that there exists a direct interaction between dark energy and cold dark matter, but this interaction is hard to be tightly constrained by the current data. Fast radio bursts (FRBs) will be seen in large numbers by future radio telescopes, and thus they have potential to become a promising low-redshift cosmological probe. In this work, we investigate the capability of future FRBs of constraining the dimensionless coupling parameter $\beta$ in four phenomenological IDE models. If we fix the FRB properties, about $10^5$ FRB data can give constraints on $\beta$ tighter than the current cosmic microwave background data in the IDE models with the interaction proportional to the energy density of dark energy. In all the IDE models, about $10^6$ FRB data can achieve the absolute errors of $\beta$ to less than $0.10$, providing a way to precisely measure $\beta$ by only one cosmological probe. Jointly constraining the FRB properties and cosmological parameters would increase the constraint errors of $\beta$ by a factor of about 0.5-2.

    ↳ astro-ph.COgr-qchep-phJCAP(2023)·32 citations
25. 25*

    Status of DMRadio-50L and DMRadio-m${}^3$

    Nicholas M. Rapidis (for the DMRadio Collaboration)🇺🇸

    Recent theoretical advancements have made the QCD axion a stronger dark matter candidate, especially in the sub-$\mu \text{eV}$ range. While cavity haloscopes have made significant progress in excluding QCD axions in the $1-100\mu \text{eV}$ region, the $1\text{ peV}-1\mu \text{eV}$ region remains unexplored. The DMRadio program consists of a series of experiments designed to probe low mass axions. DMRadio-50L uses a 1 T average field toroidal magnet and a high-Q LC-oscillator with target sensitivity to axions of $g_{a\gamma \gamma }<5\times 10^{-15}{\text{ GeV}}^{-1}$ between 5 kHz and 5 MHz. DMRadio-m${}^3$ consists of a higher frequency LC-oscillator in a 4 T peak field solenoidal magnet with sensitivity to the DFSZ model of QCD axions between 30 MHz and 200 MHz. In this work, we present the status of DMRadio-50L and DMRadio-m${}^3$.

    ↳ hep-exhep-phphysics.ins-detSciPost Phys.Proc.(2023)·7 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.