f(T) teleparallel gravity and cosmology
- Yi-Fu Cai, S. Capozziello, M. De Laurentis, E. Saridakis
- PhysicsReports on progress in physics. Physical Society
- 24 November 2015
The role of torsion in gravity has been extensively investigated along the main direction of bringing gravity closer to its gauge formulation and incorporating spin in a geometric description, and various torsional constructions, from teleparallel, to Einstein-Cartan, and metric-affine gauge theories are reviewed.
Towards a nonsingular bouncing cosmology
- Yi-Fu Cai, D. Easson, R. Brandenberger
- Physics
- 11 June 2012
We present a nonsingular bouncing cosmology using single scalar field matter with non-trivial potential and non-standard kinetic term. The potential sources a dynamical attractor solution with…
Reconsidering the one leptoquark solution: flavor anomalies and neutrino mass
- Yi-Fu Cai, John Gargalionis, M. A. Schmidt, R. Volkas
- Physics
- 19 April 2017
A bstractWe reconsider a model introducing a scalar leptoquark ϕ ∼ (3,1, −1/3) to explain recent deviations from the standard model in semileptonic B decays. The leptoquark can accommodate the…
Lepton Number Violation: Seesaw Models and Their Collider Tests
The Majorana nature of neutrinos is strongly motivated from the theoretical and phenomenological point of view. A plethora of neutrino mass models, known collectively as Seesaw models, exist that…
Matter bounce cosmology with the f(T) gravity
- Yi-Fu Cai, Shih-Hung Chen, J. Dent, S. Dutta, E. Saridakis
- Physics
- 21 April 2011
We show that the f(T) gravitational paradigm, in which gravity is described by an arbitrary function of the torsion scalar, can provide a mechanism for realizing bouncing cosmologies, thereby…
Bouncing Galileon cosmologies
- Taotao Qiu, J. Evslin, Yi-Fu Cai, Mingzhe Li, Xinmin Zhang
- Physics
- 2 August 2011
We present nonsingular, homogeneous and isotropic bouncing solutions of the conformal Galileon model. We show that such solutions necessarily begin with a radiation-dominated contracting phase. This…
Probing primordial gravitational waves: Ali CMB Polarization Telescope
- Hong Li, Siyu Li, Xinmin Zhang
- PhysicsNational Science Review
- 9 October 2017
The authors' simulations show that AliCPT will improve the current constraint on the tensor-to-scalar ratio r by one order of magnitude with three years' observation, and it is shown that the current limit by two orders of magnitude will be improved.
Cosmological perturbations in unimodular gravity
- C. Gao, R. Brandenberger, Yi-Fu Cai, Pisin Chen
- Physics
- 7 May 2014
We study cosmological perturbation theory within the framework of unimodular gravity. We show that the Lagrangian constraint on the determinant of the metric required by unimodular gravity leads to…
From the Trees to the Forest: A Review of Radiative Neutrino Mass Models
- Yi-Fu Cai, Juan Herrero garcia, M. A. Schmidt, A. Vicente, R. Volkas
- PhysicsFrontiers of Physics
- 26 June 2017
A plausible explanation for the lightness of neutrino masses is that neutrinos are massless at tree level, with their mass (typically Majorana) being generated radiatively at one or more loops. The…
GRID: a student project to monitor the transient gamma-ray sky in the multi-messenger astronomy era
- Jiaxing Wen, X. Long, Zonghong Zhu
- PhysicsExperimental astronomy (Print)
- 16 July 2019
The Gamma-Ray Integrated Detectors (GRID) is a space mission concept dedicated to monitoring the transient gamma-ray sky in the energy range from 10 keV to 2 MeV using scintillation detectors onboard…
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