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WMAP 7 year constraints on CPT violation from large angle CMB anisotropies
CMBR theory CMBR experiments
2011/10/18
We constrain the rotation angle $\alpha$ of the linear polarization of CMB photons using the large angular scale (up to $\sim 4^\circ$) signal in WMAP 7 year data. At these scales, the CMB polarizatio...
Leptogenesis in a SUSY SU(5) x T' Model with Geometrical CP Violation
Leptogenesis in a SUSY SU(5) x T' Model with Geometrical CP Violation
2011/10/14
The complex Clebsch-Gordon coefficients in the double tetrahedral group T' offers the possibility that CP violation can be entirely geometrical in origin, as pointed out by us recently. In this note, ...
Light dark matter (DM) models with isospin violation (ISV) and large DM-nucleon spin-independent cross section \sigma_n may provide a way to understand the confusing DM direct detection experimental r...
Violation of the Rotational Invariance in the CMB Bispectrum
Violation Rotational Invariance CMB Bispectrum
2011/9/27
We investigate a statistical anisotropy on the Cosmic Microwave Background (CMB) bispectrum which can be generated from the primordial non-Gaussianity induced by quantum fluctuations of a vector field...
Violation of the first law of black hole thermodynamics in $f(T)$ gravity
Violation first law black hole thermodynamics $f(T)$ gravity
2011/10/18
We prove that the first law of black hole thermodynamics, $\delta Q=T\delta S$, is violated in $f(T)$ gravity. As a result, there always exists entropy production, which implies that the black hole th...