{"total":15,"items":[{"citing_arxiv_id":"2607.00539","ref_index":35,"ref_count":1,"confidence":0.98,"is_internal_anchor":true,"paper_title":"Reference Frames and Gravitational-Wave Polarizations: Symmetry Classification and Preferred-Frame Phenomenology","primary_cat":"gr-qc","submitted_at":"2026-07-01T07:30:19+00:00","verdict":"UNVERDICTED","verdict_confidence":"LOW","novelty_score":5.0,"formal_verification":"none","one_line_summary":"Derives boost transformations for GW polarizations, proposes symmetry classification without preferred frames, and analyzes preferred-frame effects in Bumblebee gravity including novel polarization conversion.","context_count":0,"top_context_role":null,"top_context_polarity":null,"context_text":null},{"citing_arxiv_id":"2606.30785","ref_index":77,"ref_count":1,"confidence":0.98,"is_internal_anchor":true,"paper_title":"Numerical polology: towards next-generation model-building for cosmology","primary_cat":"astro-ph.CO","submitted_at":"2026-06-29T18:12:29+00:00","verdict":"UNVERDICTED","verdict_confidence":"LOW","novelty_score":6.0,"formal_verification":"none","one_line_summary":"Numerical polology framework samples coupling space to discover ghost-free tensor field theories up to rank three for cosmology, then applies resulting priors to black hole superradiance, dynamical dark energy, and GW data.","context_count":0,"top_context_role":null,"top_context_polarity":null,"context_text":null},{"citing_arxiv_id":"2606.28208","ref_index":1,"ref_count":2,"confidence":0.98,"is_internal_anchor":true,"paper_title":"Non-primary square roots in massive gravity","primary_cat":"hep-th","submitted_at":"2026-06-26T15:59:41+00:00","verdict":"UNVERDICTED","verdict_confidence":"LOW","novelty_score":5.0,"formal_verification":"none","one_line_summary":"Non-primary square roots in massive gravity preserve covariance but lack analytic perturbation theory and risk complex domains.","context_count":0,"top_context_role":null,"top_context_polarity":null,"context_text":null},{"citing_arxiv_id":"2605.02453","ref_index":30,"ref_count":1,"confidence":0.9,"is_internal_anchor":false,"paper_title":"Testing General Relativity Through Gravitational Wave Classification: A Convolutional Neural Network Framework","primary_cat":"gr-qc","submitted_at":"2026-05-04T10:57:10+00:00","verdict":"UNVERDICTED","verdict_confidence":"LOW","novelty_score":5.0,"formal_verification":"none","one_line_summary":"A CNN framework using response functions from gravitational wave mismatches classifies signals as GR or beyond-GR with 33 times better sensitivity than raw waveforms and detects massive gravity deviations at graviton masses around 10^{-23} eV/c².","context_count":1,"top_context_role":"method","top_context_polarity":"use_method","context_text":"at the event level to prevent data leakage between augmented copies of the same event. 3.1 BBH Events and Data Augmentation For each of the 173 catalogued parameter sets, we extract the source frame component massesm 1,m 2, the effective spin parameterχ eff, the redshiftz, and the luminosity distance dL. Waveforms are generated with the PyCBC package [30] using the IMRPhenomXHM approximant [31], with a low frequency cutoff off low = 10 Hz and a frequency resolution of ∆f= 1 Hz. The luminosity distance is passed to the waveform generator so that the signal amplitude reflects realistic observational conditions. With only 173 events, the network would see a limited set of parameter combinations during training, which increases the risk of overfitting to the specific waveform morpholo-"},{"citing_arxiv_id":"2605.00549","ref_index":14,"ref_count":1,"confidence":0.9,"is_internal_anchor":false,"paper_title":"Bounds on massive graviton-like particles from searches for axion-like particles coupling to photons","primary_cat":"hep-ph","submitted_at":"2026-05-01T10:04:25+00:00","verdict":"UNVERDICTED","verdict_confidence":"LOW","novelty_score":6.0,"formal_verification":"none","one_line_summary":"Limits on axion-like particles from photon-coupling searches are recast as constraints on massive graviton-like particles across lab, astrophysical, and cosmological experiments using analogous Primakoff and Gertsenshtein conversion mechanisms.","context_count":1,"top_context_role":"background","top_context_polarity":"background","context_text":"Although experimentally and theoretically less studied than spin-0 ALPs, hypothetical spin-2 massive graviton-like particles (called hereafter GLPs), are also predicted in different models of physics beyond the Standard Model (BSM). At variance with the standard graviton of General Relativity (GR) -which is massless as guaranteed by diffeomorphism invariance [14], mediates long-range gravity, has two polarizations (two tensor modes) in four dimensions (4-D), and couples universally to the energy-momentum tensor- a generic massive spin-2 particle has five physical polarizations in 4-D (two tensor modes, two vectors, and one scalar), mediates a short-range (Yukawa-type) force, may or may not couple to the metric of GR, and does not necessarily couple"},{"citing_arxiv_id":"2604.28133","ref_index":38,"ref_count":1,"confidence":0.9,"is_internal_anchor":false,"paper_title":"The DAMSA Experiment","primary_cat":"hep-ex","submitted_at":"2026-04-30T17:17:55+00:00","verdict":"UNVERDICTED","verdict_confidence":"LOW","novelty_score":6.0,"formal_verification":"none","one_line_summary":"DAMSA proposes an ultra-short baseline accelerator experiment to detect short-lived dark sector messengers by overcoming the sensitivity ceiling of longer-baseline beam dump experiments through a compact detector design.","context_count":1,"top_context_role":"background","top_context_polarity":"background","context_text":"leading to rich phenomenology. On the other hand, massive spin-2 fieldGcan also appear in the context of thermal dark matter (DM) models, whereGmediates the interaction between the DM and the SM [36, 37]. In such a case, the origin of the mass of the spin-2 fieldGis typically left unspecified, but it can be generated by the St ¨ukelberg for- malism, among other possibilities [38]. The leading decay channel of a light massive spin-2 fieldGis to two photons [36, 37], which allows for the possibility of observingGdecays in DAMSA. The leading produc- tion mechanism of producing sub-GeV spin-2 fieldGis through the Primakoff-like process of conversion of on-shell photons intoG:γN→GN[39], while bremsstrahlung is typically subdominant."},{"citing_arxiv_id":"2604.02402","ref_index":10,"ref_count":1,"confidence":0.9,"is_internal_anchor":false,"paper_title":"Thermodynamics and phase transitions of charged-AdS black holes in dRGT massive gravity with nonlinear electrodynamics","primary_cat":"gr-qc","submitted_at":"2026-04-02T16:02:14+00:00","verdict":"UNVERDICTED","verdict_confidence":"LOW","novelty_score":4.0,"formal_verification":"none","one_line_summary":"Charged AdS black holes in dRGT massive gravity with exponential NED exhibit van der Waals-like first-order, second-order critical, and reentrant phase transitions between small and large black holes at fixed Lambda.","context_count":1,"top_context_role":"background","top_context_polarity":"background","context_text":"the Arnowitt-Deser-Misner (ADM) language [ 6]. Hence, building a nonlinear but ghost-free massive gravity has been a great challenge to physicists for several decades. In fact, there have been significant efforts to develop such a theory, but none of them have been entirely successful [ 7-10]. An interesting review paper on this theory can be seen in Ref. [10]. Recently, the de Rham-Gabadadze-Tolley (dRGT) model has successfully constructed a nonlinear but ghost-free massive theory [11, 12]. Several different proofs for this ghost-free feature of the dRGT theory, even when the reference metric is arbitrary, have been demonstrated [ 13-15]. Very soon after the seminal papers of dRGT group, a number of black hole solutions have been found for the dRGT massive gravity [ 16-20]."},{"citing_arxiv_id":"2512.10870","ref_index":43,"ref_count":1,"confidence":0.98,"is_internal_anchor":true,"paper_title":"Structure of Chern-Simons Graviton Scattering Amplitudes from Topological Graviton Equivalence Theorem and Double Copy","primary_cat":"hep-th","submitted_at":"2025-12-11T18:01:18+00:00","verdict":"UNVERDICTED","verdict_confidence":"LOW","novelty_score":7.0,"formal_verification":"none","one_line_summary":"Establishes the Topological Graviton Equivalence Theorem to prove large energy cancellations in N-point massive graviton amplitudes and constructs three- and four-point amplitudes via double copy from topologically massive Yang-Mills.","context_count":0,"top_context_role":null,"top_context_polarity":null,"context_text":null},{"citing_arxiv_id":"2509.04261","ref_index":79,"ref_count":1,"confidence":0.98,"is_internal_anchor":true,"paper_title":"Topological charge and black hole photon spheres in massive gravity","primary_cat":"gr-qc","submitted_at":"2025-09-04T14:38:37+00:00","verdict":"UNVERDICTED","verdict_confidence":"LOW","novelty_score":7.0,"formal_verification":"none","one_line_summary":"In dRGT massive gravity, static spherically symmetric black holes exhibit zero, one, or two photon spheres whose topological charges and stability patterns differ from Einstein gravity and from horizonless compact objects.","context_count":1,"top_context_role":"background","top_context_polarity":"background","context_text":"studied actively[60-66]. There are interesting classes of black holes in these theories with novel thermodynamic behaviour [67-70] apart from intriguing cosmological as well as astrophysics applications [71-77], where one can investigate the deviations from Einstein's theory of gravity. Certain versions of massive gravity theories were constructed in [78] (see also [79, 80]), which have the right set of features required to address some of the shortcomings of Einstein's theory, as emphasised in [81-93]. For instance, there is a possibility of comprehending the current observations of dark matter [94] which in correlation with the accelerating expansion of the universe may relax the requirement of dark energy [95, 96]."},{"citing_arxiv_id":"2509.01614","ref_index":61,"ref_count":1,"confidence":0.98,"is_internal_anchor":true,"paper_title":"Probing modified gravitational-wave dispersion with bursts from eccentric black-hole binaries","primary_cat":"gr-qc","submitted_at":"2025-09-01T16:47:37+00:00","verdict":"CONDITIONAL","verdict_confidence":"LOW","novelty_score":5.0,"formal_verification":"none","one_line_summary":"Applies parameterized dispersion to eccentric BBH burst waveforms, deriving a 2.5PN time-delay correction and Bessel amplitude modulation, then uses Fisher matrix to project LIGO constraints that are stronger than current bounds for Hořava-Lifschitz and extra-dimension models.","context_count":0,"top_context_role":null,"top_context_polarity":null,"context_text":null},{"citing_arxiv_id":"2503.12263","ref_index":48,"ref_count":1,"confidence":0.9,"is_internal_anchor":false,"paper_title":"The Science of the Einstein Telescope","primary_cat":"gr-qc","submitted_at":"2025-03-15T21:04:14+00:00","verdict":"UNVERDICTED","verdict_confidence":"LOW","novelty_score":3.0,"formal_verification":"none","one_line_summary":"The paper provides state-of-the-art predictions for the Einstein Telescope's impact on fundamental physics, cosmology, compact-object astrophysics, and multi-messenger astronomy across its proposed configurations.","context_count":1,"top_context_role":"background","top_context_polarity":"background","context_text":"scalar (propagating) field [41-43], an example of this being f(R) gravity [44, 45]. (ii) Einstein-aether theory predicts two tensor modes, two vector modes and one scalar mode [46, 47]. (iii) The ghost-free massive gravity proposed by de Rham-Gabadadze-Tolley (dRGT) [61], in which gravity is mediated by a massive field ms of spin s = 2, propagates 2 s + 1 = 5 polarizations [48]. (iv) In Bumblebee gravity the polarization content is anisotropic, and depends on the angle between the background vector field and the propagation direction of GWs [49]. (v) Randall-Sundrum braneworld models yield five bulk graviton polarizations [50]. (vi) In the version of non-local massive gravity free of ghosts on Minkowski space- time [62], one has five perturbative degrees of freedom."},{"citing_arxiv_id":"1906.12055","ref_index":30,"ref_count":1,"confidence":0.98,"is_internal_anchor":true,"paper_title":"Non-Fierz-Pauli bimetric theory from quadratic curvature gravity on Einstein manifolds","primary_cat":"gr-qc","submitted_at":"2019-06-28T06:24:09+00:00","verdict":"UNVERDICTED","verdict_confidence":"LOW","novelty_score":6.0,"formal_verification":"none","one_line_summary":"Quadratic curvature gravity on Einstein manifolds decouples into massless and non-Fierz-Pauli massive gravity sectors, enabling observational constraints on its parameters with noted tension for the Weyl term.","context_count":0,"top_context_role":null,"top_context_polarity":null,"context_text":null},{"citing_arxiv_id":"1906.11841","ref_index":8,"ref_count":1,"confidence":0.98,"is_internal_anchor":true,"paper_title":"Bimetric interactions based on metric congruences","primary_cat":"hep-th","submitted_at":"2019-06-27T18:00:00+00:00","verdict":"UNVERDICTED","verdict_confidence":"LOW","novelty_score":6.0,"formal_verification":"none","one_line_summary":"Bimetric interactions are defined via a congruence matrix, with the square root shown as the unique power series solution and algebraic equivalence to the unconstrained vielbein formulation.","context_count":0,"top_context_role":null,"top_context_polarity":null,"context_text":null},{"citing_arxiv_id":"1501.07274","ref_index":16,"ref_count":1,"confidence":0.9,"is_internal_anchor":false,"paper_title":"Testing General Relativity with Present and Future Astrophysical Observations","primary_cat":"gr-qc","submitted_at":"2015-01-28T21:00:11+00:00","verdict":"ACCEPT","verdict_confidence":"LOW","novelty_score":2.0,"formal_verification":"none","one_line_summary":"A review summarizing modified theories of gravity, their effects on compact objects, existing bounds from astrophysical observations, and the promise of future gravitational wave tests for strong-field gravity.","context_count":1,"top_context_role":"background","top_context_polarity":"background","context_text":"critical EdGB solutions. Note that the ISCO radius is not given in Boyer-Lindquist coordinates. When the rescaled angular momentum is large, the deviation ofRISCO/M from the Kerr value can be as large as 10% forb = 1/2. Similarly, for large angular momentum the orbital frequencies at the ISCO exhibit deviations from the Kerr frequencies as large as 60% [see(3.16) for a small-spin expansion]. Note, however, that the weak equivalence principle imposesb = 0, so that the corrections to the geodesic quantities are expected to be smaller. Future space-based observations of the gravitational signal emitted by extreme mass-ratio inspirals [428] and observations of the electromagnetic signal associated to quasi-periodic oscillations in low mass X-ray binaries [91,429,430] can be used to map"},{"citing_arxiv_id":"1403.7377","ref_index":173,"ref_count":1,"confidence":0.9,"is_internal_anchor":false,"paper_title":"The Confrontation between General Relativity and Experiment","primary_cat":"gr-qc","submitted_at":"2014-03-28T14:04:31+00:00","verdict":"ACCEPT","verdict_confidence":"HIGH","novelty_score":2.0,"formal_verification":"none","one_line_summary":"Experiments confirm general relativity to high precision in weak-field and strong-field regimes, with gravitational wave damping matching predictions to better than 0.5 percent.","context_count":1,"top_context_role":"background","top_context_polarity":"background","context_text":"or a continuum of massive gravitons, and may avoid the vDVZ discont inuity, although the full details are still a work in progress [113, 86]. Attempts to avert the v DVZ problem involve treating non-linear aspects of the theory at the fundamental level; many m odels incorporate a second tensor field in addition to the metric. For recent reviews, see [173, 111], and a focus issue in Vol. 30, Number 18 of Classical and Quantum Gravity . 4 Tests of Post-Newtonian Gravity 4.1 Tests of the parameter γ With the PPN formalism in hand, we are now ready to confront gravita tion theories with the results of solar-system experiments. In this section we focus on t ests of the parameter γ, consisting of the deflection of light and the time delay of light."}],"limit":50,"offset":0}