Tanmay Kumar Poddar, Subhendra Mohanty, Soumya Jana,
Abstract Theories with massive gravitons have peculiarity called the van Dam-Veltman-Zakharov discontinuity in that the massive theory propagator does not go to the massless graviton propagator in the zero graviton mass limit. This results in large deviation in Newtons law for massive graviton theories even when the graviton mass vanishes. We test the vDVZ in massive graviton theories for single graviton vertex process namely the gravitational radiation from a ... this calculation for Einstein's gravity with massless gravitons and verify that the Feynman diagram calculation reproduces ...
Tópico(s): Pulsars and Gravitational Waves Research
2022 - Institute of Physics | Journal of Cosmology and Astroparticle Physics
Philippe Brax, Sebastián Céspedes, Anne-Christine Davis,
The impact of the existence of gravitons with non-vanishing masses on the B-modes of the Cosmic Microwave Background (CMB) is investigated. We also focus on putative modifications ... waves. We find that a change of the graviton speed shifts the acoustic peaks of the CMB ... the case when there are more than one graviton, and when pressure instabilities are present. The latter ... We focus on the case where a massless graviton becomes tachyonic in the radiation era whilst a ... of B-modes as long as the unstable graviton does not grow into the non-linear regime. ...
Tópico(s): Black Holes and Theoretical Physics
2018 - Institute of Physics | Journal of Cosmology and Astroparticle Physics
A. F. Zakharov, P. Jovanović, D. Borka, V. Borka Jovanović,
... on the subject the authors also presented a graviton mass constraint as mg < 1.2 × 10−22 ... constraints on Yukawa gravity parameters [3] and on graviton mass from analysis of the trajectory of S2 ... analyze a potential to reduce upper bounds for graviton mass with future observational data on trajectories of ... gives an opportunity to improve current estimates of graviton mass with future observational facilities. In our considerations of an improvement potential for a graviton mass estimate we adopt a conservative strategy and ...
Tópico(s): Black Holes and Theoretical Physics
2018 - Institute of Physics | Journal of Cosmology and Astroparticle Physics
... 28, No. 25, 1330041 (2013) ReviewsNo AccessIS A GRAVITON DETECTABLE?FREEMAN DYSONFREEMAN DYSONInstitute for Advanced Study, Princeton, ... D, Vol. 106, No. 8Squeezed quantum states of graviton and axion in the universeSugumi Kanno and Jiro ... 2021 | Universe, Vol. 7, No. 11Indirect detection of gravitons through quantum entanglementSugumi Kanno, Jiro Soda and Junsei ... High Energy Physics, Vol. 2021, No. 1State-dependent graviton noise in the equation of geodesic deviationZ. Haba18 ... D, Vol. 99, No. 12Bounding the mass of graviton in a dynamic regime with binary pulsarsXueli Miao, ...
Tópico(s): Paranormal Experiences and Beliefs
2013 - World Scientific | International Journal of Modern Physics A
Kejia Lee, Fredrick Jenet, Richard H. Price, Norbert Wex, M. Krämer,
... and is non-dispersive. For these reasons, the graviton, the boson for general relativity, can be considered to be massless. Massive gravitons, however, are features of some alternatives to general ... far, have been consistent with the zero-mass graviton of general relativity, but further tests will be ... low levels of dispersion due to non-zero graviton mass. One of the most promising techniques for ... response to a GW background with the massive graviton is calculated, and the algorithm to detect the massive graviton is presented. We conclude that, with 90% probability, ...
Tópico(s): Black Holes and Theoretical Physics
2010 - IOP Publishing | The Astrophysical Journal
... stable spherical configuration which is called as giant graviton and has a less energy than the point-like graviton. The giant graviton configuration is stable only if its angular momentum ... has a larger energy than the point-like graviton. We also find that the dipole field always render the dual giant graviton to be more stable than the point-like graviton. The relation of dual giant graviton energy with its angular momentum, which in the ... does not change the property of the giant graviton, while it will render the dual giant graviton ...
Tópico(s): Noncommutative and Quantum Gravity Theories
2007 - Springer Nature | Journal of High Energy Physics
... energy and quantum number of the point-like graviton and is called as a giant graviton. The configuration is stable only if its angular ... paper we investigate the properties of the giant graviton in the electric/magnetic Melvin geometries of deformed $ ... that in the magnetic Melvin spacetime the giant graviton has lower energy than the point-like graviton. Also, the critical value of the angular momentum ... increasing the angular momentum the radius of giant graviton is initially an increasing function, then, after it ...
Tópico(s): Noncommutative and Quantum Gravity Theories
2006 - Elsevier BV | Physics Letters B
... exclude massive gravity, in the sense that the graviton mass must be rigorously zero. This is because ... a discontinuity in the linearized gravity theory at graviton mass equal to zero. The linearized Schwarzschild metric is not recovered for infinitesimal graviton mass, contradicting observations on light deviation by the ... make the massive gravity theory continuous in the graviton mass. Both the original suggestion and its refutation ... that is known to be discontinuous in the graviton mass in the linear approximation. We show that ...
Tópico(s): Cosmology and Gravitation Theories
2005 - Elsevier BV | New Astronomy
P. Jovanović, V. Borka Jovanović, D. Borka, A. F. Zakharov,
... existing constraints on the upper bound of the graviton mass by the analysis of the stellar orbits ... that it corresponds to the Compton wavelength of graviton, we then calculated new estimates for the upper bound of graviton mass which are found to be independent, but consistent with the LIGO's estimate of graviton mass from the first gravitational wave (GW) signal GW150914 (later this graviton mass estimation was significantly improved with consequent observations ... simulations in order to constrain the bounds on graviton mass in the case of a small deviation ...
Tópico(s): Geophysics and Gravity Measurements
2024 - American Physical Society | Physical review. D/Physical review. D.
Luis A. Anchordoqui, Ignatios Antoniadis, Dieter Lüst,
... primordial black holes and massive 5-dimensional KK gravitons as dark matter candidate within the recently proposed ... practically indistinguishable from a KK tower of dark gravitons with $m_{\rm DM} \sim 50~{\rm keV}$. ... of massive spin-2 KK excitations of the graviton. The dark gravitons are produced at a mass $\sim 1 - 50~{\ ... of the system proceeds via decay to lighter gravitons without losing much total mass density, resembling the ... We associate the intra-tower decays of the graviton gas with the black hole growth through accretion. ...
Tópico(s): Pulsars and Gravitational Waves Research
2023 - Elsevier BV | Physics Letters B
Giovanni Cabass, Enrico Pajer, David Stefanyszyn, Jakub Supeł,
... these datasets we need to know the possible graviton non-Gaussianities. To this end, we derive the ... level three-point functions (bispectra) for a massless graviton to all orders in derivatives , assuming scale invariance. ... only a handful of possible shapes: three for graviton-graviton-graviton, three for scalar-graviton-graviton and one for scalar-scalar-graviton, which we bootstrap explicitly. These parity-odd non- ...
Tópico(s): Black Holes and Theoretical Physics
2022 - Springer Nature | Journal of High Energy Physics
Shamik Banerjee, Sudip Ghosh, Partha Paul,
The Cachazo-Strominger subleading soft graviton theorem for a positive helicity soft graviton is equivalent to the Ward identities for $\overline{SL(2,\mathbb C)}$ currents. This ... supertranslations, coming from a positive helicity leading soft graviton, form a closed algebra. We find that the OPE of two graviton primaries in the Celestial CFT, extracted from MHV ... under this local symmetry algebra. 2) Positive helicity gravitons have null states under this local algebra whose ... order PDEs corresponding to $(n-2)$ positive helicity gravitons. We have checked, using Hodges' formula, that one ...
Tópico(s): Noncommutative and Quantum Gravity Theories
2021 - Springer Nature | Journal of High Energy Physics
Kaustubh Agashe, Majid Ekhterachian, Doojin Kim, Deepak Sathyan,
... from production and decay of Kaluza-Klein (KK) gravitons in the context of "extended" warped extra-dimensional ... effects, while keeping the KK gauge bosons and gravitons accessible to the LHC. We find that the signals from KK graviton are significantly different than in the standard warped ... because the usually dominant decay modes of KK gravitons into top quark, Higgs and longitudinal $W/Z$ ... on two novel decay channels of the KK graviton. The first one is the decay into a ... or KK gluon is lighter, then the KK graviton mostly decays into a KK gluon and a ...
Tópico(s): Black Holes and Theoretical Physics
2020 - Springer Nature | Journal of High Energy Physics
... will be looking at the energy of a graviton, based upon the Stress energy tensor, and from ... early universe conditions impact the mass of a graviton. Physically the mass of the graviton would be shrinking right after Planck time and ... 62 grams, for its present day value. It, graviton mass, would increase up to the Plank time ... 10-44 seconds. Note that the result that graviton mass shrinks to 10-62 grams for its present day value works only for relic gravitons.
Tópico(s): Relativity and Gravitational Theory
2015 - Scientific Research Publishing | Journal of High Energy Physics Gravitation and Cosmology
Hooman Davoudiasl, Thomas G. Rizzo,
... the emergence of spin-2 Kaluza–Klein (KK) gravitons with weak scale masses and couplings. The lowest ... gravity which uniquely fixes the self-interactions of gravitons. We demonstrate that large numbers of light KK ... be produced at a future lepton-collider-based “Graviton Factory”. Measuring the self-interactions of these KK gravitons will probe the accuracy of the 5-d ... yet untested self-coupling of the 4-d graviton. The self-interactions of the gravitons can be studied by measuring the decays of ... precise measurements of the rare decays of KK graviton/gauge states into flavor non-diagonal final states ...
Tópico(s): Particle physics theoretical and experimental studies
2001 - Elsevier BV | Physics Letters B
James T. Liu, Neville Joshua Rajappa,
... a sum of terms corresponding to a giant graviton expansion of the index, and provided an explicit formula for the case of a single giant graviton. Here we give similar explicit formulae for an arbitrary number, $m\ge1$, of giant gravitons. We provide 1/2 and 1/16 BPS ... examples up to the order where three giant gravitons contribute and demonstrate that the expansion of the matrix integral differs from the giant graviton expansion computed in the supergravity dual. This shows that the giant graviton expansion is not necessarily unique once two or ...
Tópico(s): Quantum Chromodynamics and Particle Interactions
2023 - Springer Nature | Journal of High Energy Physics
... of scattering amplitudes of the Kaluza-Klein (KK) gravitons and of the gravitational KK Goldstone bosons in ... geometric "Higgs" mechanism for mass-generation of KK gravitons under compactification with a general $R_\xi$ gauge- ... Equivalence Theorem (GRET) to connect the longitudinal KK graviton amplitudes to the KK Goldstone amplitudes, which is ... KK Goldstone amplitudes which equal the longitudinal KK graviton amplitudes in the high energy limit. We further ... kinematics duality to reconstruct the massive KK longitudinal graviton (Goldstone) amplitudes from the KK longitudinal gauge boson ( ...
Tópico(s): Particle physics theoretical and experimental studies
2022 - American Physical Society | Physical review. D/Physical review. D.
Diego Blas, Jorge Martin Camalich, J. A. Oller,
... in detail by unitarizing the Born terms for graviton-graviton scattering in pure gravity and we find a scalar graviton-graviton resonance with vacuum quantum numbers ( J PC = 0 ++ ) ... 0 partial-wave projected Born term as the graviton-graviton case, except for a global factor. We find ...
Tópico(s): Noncommutative and Quantum Gravity Theories
2022 - Springer Nature | Journal of High Energy Physics
Marc Henneaux, Victor Lekeu, Amaury Leonard,
The (free) graviton admits, in addition to the standard Pauli-Fierz description by means of a rank-two symmetric tensor, a ... Yound symmetry (D-3,1) called the "dual graviton" field. The dual graviton field is related non-locally to the Pauli- ... D-3) mixed Young symmetry, the "double dual graviton" field. We show, however, that the double dual graviton field is algebraically and locally related to the ... not provide a truly new description of the graviton. From this point of view, it plays a very different role from the dual graviton field obtained through a single dualization. We also ...
Tópico(s): Noncommutative and Quantum Gravity Theories
2019 - Institute of Physics | Journal of Physics A Mathematical and Theoretical
... to new constraints on the mass of the graviton. Previous tests, however, have neglected the effect of ... in modified theories that predict a non-zero graviton mass. We here study whether future gravitational wave observations can constrain the graviton mass when screening effects are taken into account. ... propagation of gravitational waves due to screened massive graviton effects. We find that future observation can place constraints on the screening radius and the graviton mass of ${\cal{O}}(10^{2})$--${\cal{O}}( ...
Tópico(s): Particle physics theoretical and experimental studies
2019 - IOP Publishing | Classical and Quantum Gravity
Akshay Rana, Deepak Jain, Shobhit Mahajan, Amitabha Mukherjee,
In General Relativity (GR), the graviton is massless. However, a common feature in several theoretical alternatives of GR is a non-zero mass for the graviton. These theories can be described as massive gravity ... have been widely used to put bounds on graviton mass. One of the generic implications of giving a mass to the graviton is that the gravitational potential will follow a ... massive gravity theories to probe the mass of graviton by using the largest gravitationally bound objects, namely ... sigma$ confidence region, we obtain the mass of graviton $m_g < 5.9 \times 10^{-30}$ eV ...
Tópico(s): Black Holes and Theoretical Physics
2018 - Elsevier BV | Physics Letters B
Nicola Bartolo, Ahmad Hoseinpour, Giorgio Orlando, S. Matarrese, Moslem Zarei,
Gravitons are the quantum counterparts of gravitational waves in low-energy theories of gravity. Using Feynman rules ... can compute scattering amplitudes describing the interaction between gravitons and other fields. Here, we consider the interaction between gravitons and photons. Using the quantum Boltzmann equation formalism, ... photon polarization, due to the forward scattering with gravitons. We show that the Q and U photon ... with the V photon circular polarization mode, if gravitons have anisotropies in their power-spectrum statistics. As ...
Tópico(s): Pulsars and Gravitational Waves Research
2018 - American Physical Society | Physical review. D/Physical review. D.
... minimum non zero lower ground to a massive graviton, mgraviton. The lower bound to the massive graviton is influenced by δgtt and kinetic energy which ... we consider the lower mass limits of the graviton as due to when the inflaton is many ... approximation as to initial entropy production N~Sinitial(graviton)~1037. Finally, this entropy is N, and we ... which is linked to initial value of a graviton mass. Appendix E is for the Riemannian-Penrose ... which is foundational to the lower bound to Graviton mass. We will in the future add more ...
Tópico(s): Noncommutative and Quantum Gravity Theories
2016 - Scientific Research Publishing | Journal of High Energy Physics Gravitation and Cosmology
Ioannis Haranas, Ioannis Gkigkitzis,
... investigate the relation of the mass of the graviton to the number of information N in a ... result we find that the mass of the graviton scales as [Formula: see text]. Furthermore, we find that the number of gravitons contained inside the observable horizon is directly proportional ... N gr ∝ N. Similarly, the total mass of gravitons that exist in the universe is proportional to ... an effort to establish a relation between the graviton mass and the basic parameters of the universe, we find that the mass of the graviton is simply twice the Hubble mass m H ...
Tópico(s): Advanced Mathematical Theories and Applications
2014 - Hindawi Publishing Corporation | International Scholarly Research Notices
Jay Armas, Troels Harmark, Niels A. Obers, Marta Orselli, Andreas Vigand Pedersen,
We study the giant graviton solution as the AdS5 × S 5 background is heated up to finite temperature. The analysis employs the thermal brane probe ... approach. We focus mainly on the thermal giant graviton corresponding to a thermal D3-brane probe wrapped ... interesting new effects, including that the thermal giant graviton has a minimal possible value for the angular ... compute the free energy of the thermal giant graviton in the low temperature regime, which potentially could ... of solutions and stability of the thermal giant graviton and find that, in parallel with the extremal ...
Tópico(s): Galaxies: Formation, Evolution, Phenomena
2012 - Springer Nature | Journal of High Energy Physics
Sergei Dubovsky, Raphael Flauger, Alexei A. Starobinsky, I. Tkachev,
... Higgs phase that allow the coexistence of massive gravitons and the conventional 1/r potential of gravity. ... an effort to constrain the value of the graviton mass in these theories, we study the tensor ... spectra in the presence of a non-vanishing graviton mass. We find that the observation of a ... on the mass of an elementary particle -- a graviton -- at a level of m\lesssim 10^(-30) ... 10 Mpc)^(-1). We also find that a graviton mass in the range between (10 Mpc)^(-1) ... the polarization spectrum. The characteristic signature of a graviton mass in this range would be a plateau ...
Tópico(s): Dark Matter and Cosmic Phenomena
2010 - American Physical Society | Physical review. D. Particles, fields, gravitation, and cosmology/Physical review. D, Particles, fields, gravitation, and cosmology
Oleg Antipin, David Atwood, Amarjit Soni,
... scenario is the existence of Kaluza–Klein (KK) gravitons whose masses and couplings to the SM fields ... of this framework, the largest coupling of the gravitons to the observed particles is to the top ... unphysical Higgses (WL± and ZL) with the KK graviton (G) masses predicted to be ≳4 TeV. We extend earlier works on the KK graviton decays to the tt¯ final state and to ... μ−) by studying the resonant production of the gravitons and their subsequent decay to WLWL pair. We ... good opportunity to search for the RS KK graviton mode with mass lighter than ∼3–3.5 ...
Tópico(s): Cosmology and Gravitation Theories
2008 - Elsevier BV | Physics Letters B
Zackaria Chacko, Michael L. Graesser, Christophe Grojean, Luigi Pilo,
At present no theory of a massive graviton is known that is consistent with experiments at both long and short distances. The problem is that consistency with long distance experiments requires the graviton mass to be very small. Such a small graviton mass however implies an ultraviolet cutoff for the ... consequences of writing a mass term for the graviton on a the infrared brane where the local ... at longer distances. A careful analysis of the graviton two-point function, however, reveals the presence of ...
Tópico(s): Galaxies: Formation, Evolution, Phenomena
2004 - American Physical Society | Physical review. D. Particles, fields, gravitation, and cosmology/Physical review. D, Particles, fields, gravitation, and cosmology
Cédric Deffayet, Gia Dvali, Gregory Gabadadze, A.I. Vainshtein,
We address the question whether a graviton could have a small nonzero mass. The issue is subtle for two reasons: there is a discontinuity in the mass in the ... the nonlinear four-dimensional theory of a massive graviton is not defined unambiguously. First, we reiterate the old argument that for the vanishing graviton mass the lowest tree-level approximation breaks down ... the higher order corrections are singular in the graviton mass. However, there exist nonperturbative solutions which correspond ... terms and these solutions are continuous in the graviton mass. Furthermore, we study a completely nonlinear and ...
Tópico(s): Galaxies: Formation, Evolution, Phenomena
2002 - American Physical Society | Physical review. D. Particles, fields, gravitation, and cosmology/Physical review. D. Particles and fields
Dmitry Gorbunov, V. A. Rubakov, Sergey Sibiryakov,
... this model, a natural {\it in}-vacuum of gravitons is the vacuum defined in static adS$_5$ ... the brane is at rest. Thus, during inflation, gravitons on and off the brane remain in their vacuum state. We then study graviton creation by the brane on which inflation terminates at some moment of time. We mostly consider gravitons whose wavelengths at the end of inflation exceed ... and the adS$_5$ radius. Creation of these gravitons is dominated by (zero mode)--(zero mode) Bogoliubov ... from an overall factor, the spectrum of produced gravitons is the same as in four-dimensional theory. `` ...
Tópico(s): Galaxies: Formation, Evolution, Phenomena
2001 - Springer Nature | Journal of High Energy Physics