Results 21 to 30 of about 165,969,103 (172)

The hand-made tail: non-perturbative tails from multifield inflation

Journal of High Energy Physics, 2022
It is becoming increasingly clear that large but rare fluctuations of the primordial curvature field, controlled by the tail of its probability distribution, could have dramatic effects on the current structure of the universe — e.g. via primordial black-
Ana Achúcarro, Sebastián Céspedes, Anne-Christine Davis, Gonzalo A. Palma   +3 more
doaj   +1 more source

BSM Integrated PEP with Cross-Layer Improvements [PDF]

, 2009
The future development of broadband satellite systems providing services based on the Internet Protocol (IP) needs to be stimulated by means of common standards. This paper presents the ETSI BSM PEP terminal architecture and PEP usage scenarios.
Berioli M., Matteo Berioli, Robert J. Mort, Giovanni Giambene, Berioli, Matteo, Berioli, M, Mort, Robert J., Cruickshank, HS, Giambene G., Giambene, Giovanni, Cruickshank H., Giambene, G, Haitham Cruickshank, Mort R. J., Cruickshank, Haitham, Mort, R   +15 more
core   +1 more source

The viability of modified gravity theories [PDF]

, 2009
PhDThis thesis studies the viability of classes of modified gravity (MG) theories based on generalisations of the Einstein-Hilbert action. Particular emphasis is given to f(R) theories in both the metric and Palatini formalisms, scalar-tensor theories ...
Uddin, Kotub
core   +4 more sources

Probing Scalar and Pseudoscalar Solutions to the g − 2 Anomaly

Advances in High Energy Physics, Volume 2020, Issue 1, 2020., 2020
I investigate a class of models with scalar and pseudoscalar solutions to the g − 2 anomaly for both the muon and the electron over the mass range of perturbativity (mϕ≲50 GeV), with Yukawa couplings proportional to the lepton’s mass. In particular, I investigate the constraints from BaBar, beam dump experiments, Z decay measured quantities, LEP mono‐γ
Fayez Abu-Ajamieh, Antonio J. Accioly
wiley   +1 more source

Global Existence and Decay for a System of Two Singular Nonlinear Viscoelastic Equations with General Source and Localized Frictional Damping Terms

Journal of Function Spaces, Volume 2020, Issue 1, 2020., 2020
The current paper deals with the proof of a global solution of a viscoelasticity singular one‐dimensional system with localized frictional damping and general source terms, taking into consideration nonlocal boundary condition. Moreover, similar to that in Boulaaras’ recent studies by constructing a Lyapunov functional and use it together with the ...
Salah Mahmoud Boulaaras, Rafik Guefaifia, Nadia Mezouar, Ahmad Mohammed Alghamdi, Fanglei Wang   +4 more
wiley   +1 more source

Bouncing cosmology in modified gravity with higher-order curvature terms

Journal of High Energy Physics, 2023
A bouncing scenario of a flat homogeneous and isotropic universe is explored by using the reconstruction technique for the power-law parametrization of the Hubble parameter in a modified gravity theory with higher-order curvature and trace of the energy ...
J. K. Singh, Harshna Balhara, Kazuharu Bamba, J. Jena   +3 more
doaj   +1 more source

Search for Physics beyond the Standard Model in four- and three-top quark production [PDF]

Journal of Subatomic Particles and Cosmology
A reinterpretation of four-top quark ($t\bar{t}t\bar{t}$) production is presented using the full Run 2 dataset recorded by the CMS experiment, corresponding to an integrated luminosity of 138 fb$^{-1}$.
M. Shooshtari
semanticscholar   +1 more source

Global Existence of Solutions for the Viscoelastic Kirchhoff Equation with Logarithmic Source Terms

Complexity, Volume 2020, Issue 1, 2020., 2020
In this paper, a nonlinear viscoelastic Kirchhoff equation in a bounded domain with a time‐varying delay term and logarithmic nonlinearity in the weakly nonlinear internal feedback is considered, where the global and local existence of solutions in suitable Sobolev spaces by means of the energy method combined with Faedo‐Galerkin procedure is proved ...
Nadia Mezouar, Salah Mahmoud Boulaaras, Ali Allahem, Karthikeyan Rajagopal   +3 more
wiley   +1 more source

Generating enhanced primordial GWs during inflation with intermittent violation of NEC and diminishment of GW propagating speed

Journal of High Energy Physics, 2022
We investigate both the null energy condition (NEC) violating scenario and the c T -diminishing scenario for generating enhanced power spectrum of primordial gravitational waves (GWs) during inflation, where c T is the propagating speed of primordial GWs.
Yong Cai, Yun-Song Piao
doaj   +1 more source

Lorentz Invariance and the Zero-Point Stress-Energy Tensor [PDF]

, 2016
Some 67 years ago (1951), Wolfgang Pauli noted that the net zero-point energy density could be set to zero by a carefully fine-tuned cancellation between bosons and fermions.
M. Visser
semanticscholar   +1 more source