26 citations · 110 across the 14 of their papers we have counts for
14 papers
Neutrino Mass, Vacuum Stability and Higgs Inflation with Vector-Like Quarks and a Single Right-Handed Neutrino
Canan Karahan
We investigate a Standard Model extension containing degenerate down-type isosinglet vector-like quarks (VLQs) with masses and Yukawa couplings $y_{\mathcal D}…
Large Field Polynomial Inflation in Palatini Gravity
Nilay Bostan, Canan Karahan, Ozan Sargın
In this paper, we employ the Palatini formalism to investigate the dynamics of large-field inflation using a renormalizable polynomial inflaton potential in the context of …
Inflation in Symmergent Metric-Palatini Gravity
Nilay Bostan, Canan Karahan, Ozan Sargın
In this paper, we study the cosmological inflation phenomenon in symmergent gravity theory. Symmergent gravity is a novel framework which merges gravity and the standard model (SM)…
Dimensional Regularization in Quantum Field Theory with Ultraviolet Cutoff
Durmus Demir, Canan Karahan, Ozan Sargın
In view of various field-theoretic reasons, in the present work, we study the question of if the usual dimensional regularization can be extended to quantum field theories with an…
Ricci-Determinant Gravity: Dynamical Aspects and Astrophysical Implications
Hemza Azri, K. Yavuz Ekşi, Canan Karahan +1
The Palatini gravitational action is enlarged by an arbitrary function of the determinants of the Ricci tensor and the metric, . The res…
Type-3/2 Seesaw Mechanism
Durmus Demir, Canan Karahan, Ozan Sargın
Type-I seesaw provides a natural explanation for the tiny neutrino masses. The right-handed neutrino masses it requires are, however, too large to keep the Higgs boson mass at its…
Affine gravitational scenario for dark matter decay
Hemza Azri, Adil Jueid, Canan Karahan +1
Since the current evidence of its existence is revealed only through its gravitational influence, the way dark matter couples to gravity must be then of primary importance. Here, u…
Electroweak Stability and Discovery Luminosities for New Physics
Kerem Cankocak, Durmus Demir, Canan Karahan +1
What is the luminosity needed for discovering new physics if the electroweak scale is to remain stable? In this work we study this question, with the example of a real singlet scal…
Hidden Spin-3/2 Field in the Standard Model
Durmuş Demir, Canan Karahan, Beste Korutlu +1
Here we show that a massive spin-3/2 field can hide in the SM spectrum in a way revealing itself only virtually. We study collider signatures and loop effects of this field, and de…
Higgsed Stueckelberg Vector and Higgs Quadratic Divergence
Durmus Ali Demir, Canan Nurhan Karahan, Beste Korutlu
Here we show that, a hidden vector field whose gauge invariance is ensured by a Stueckelberg scalar and whose mass is spontaneously generated by the Standard Model Higgs field cont…
Relativistic MOND from Modified Energetics
Durmus Ali Demir, Canan Nurhan Karahan
We begin to investigate the question of what modifications in energy-momentum tensor can yield correct MOND regime. As a starting study, we refrain from insisting on an action prin…
Effects of a Real Singlet Scalar on Veltman Condition
Canan Nurhan Karahan, Beste Korutlu
We revisit the fine-tuning problem in the Standard Model (SM) and show the modification in Veltman condition by virtue of a minimally-extended particle spectrum with one real SM ga…
Conformal Transformations in Metric-Affine Gravity and Ghosts
Canan N. Karahan, Oktay Dogangun, Durmus A. Demir
Conformal transformations play a widespread role in gravity theories in regard to their cosmological and other implications. In the pure metric theory of gravity, conformal transfo…
Scalars, Vectors and Tensors from Metric-Affine Gravity
Canan N. Karahan, Asli Altas, Durmus A. Demir
The metric-affine gravity provides a useful framework for analyzing gravitational dynamics since it treats metric tensor and affine connection as fundamentally independent variable…