Results 51 to 60 of about 173,599 (260)

Discovery of a new type of topological Weyl fermion semimetal state in MoxW1−xTe2 [PDF]

Nature Communications, 2016
The recent discovery of a Weyl semimetal in TaAs offers the first Weyl fermion observed in nature and dramatically broadens the classification of topological phases. However, in TaAs it has proven challenging to study the rich transport phenomena arising
I. Belopolski, D. Sanchez, Y. Ishida, Xingchen Pan, Peng Yu, Su-Yang Xu, G. Chang, Tay-Rong Chang, Hao Zheng, N. Alidoust, G. Bian, M. Neupane, Shin-Ming Huang, Chi-Cheng Lee, You Song, Haijun Bu, Guanghou Wang, Shisheng Li, G. Eda, H. Jeng, H. Jeng, Takeshi Kondo, Hsin Lin, Zheng Liu, Fengqi Song, Shik Shin, M. Z. Hasan   +26 more
semanticscholar   +1 more source

Mass perturbation theory in the 2-flavor Schwinger model with opposite masses with a review of the background

Journal of High Energy Physics, 2022
I discuss the 2-flavor Schwinger model with θ = 0 and small equal and opposite fermion masses (or θ = π with equal masses). The massless model has an unparticle sector with unbroken conformal symmetry.
Howard Georgi
doaj   +1 more source

Bright solitons and soliton trains in a fermion-fermion mixture [PDF]

Eur. Phys. J. D 40 (2006) 157-160, 2007
We use a time-dependent dynamical mean-field-hydrodynamic model to predict and study bright solitons in a degenerate fermion-fermion mixture in a quasi-one-dimensional cigar-shaped geometry using variational and numerical methods. Due to a strong Pauli-blocking repulsion among identical spin-polarized fermions at short distances there cannot be bright ...
arxiv   +1 more source

Dark sector effective field theory

Journal of High Energy Physics, 2023
We introduce the effective field theory of two different light dark particles interacting with the standard model (SM) light states in a single vertex, termed dark sector effective field theory (DSEFT). We focus on the new light particles with spin up to
Jin-Han Liang, Yi Liao, Xiao-Dong Ma, Hao-Lin Wang   +3 more
doaj   +1 more source

Dynamical origin of low-mass fermions in Randall-Sundrum background [PDF]

Int.J.Mod.Phys. A20 (2005) 4085-4094, 2003
We investigate a dynamical mechanism to generate fermion mass in the Randall-Sundrum background. We consider four-fermion interaction models where the fermion field propagates in an extra-dimension, i.e. the bulk four-fermion interaction model. It is assumed that two types of fermions with opposite parity exist in the bulk.
arxiv   +1 more source

Phenomenology of fermion production during axion inflation [PDF]

Journal of Cosmology and Astroparticle Physics, 2018
We study the production of fermions through a derivative coupling with a pseudoscalar inflaton and the effects of the produced fermions on the scalar primordial perturbations.
Peter Adshead, Lauren Pearce, M. Peloso, M. A. Roberts, L. Sorbo   +4 more
semanticscholar   +1 more source

RNA Oligomerisation without Added Catalyst from 2′,3′‐Cyclic Nucleotides by Drying at Air‐Water Interfaces**

ChemSystemsChem, Volume 5, Issue 1, January 2023., 2023
Without catalyst! A non‐enzymatic, spontaneous route to the formation of short, mixed‐sequence RNA strands from 2′,3′‐cyclic ribonucleotides is shown. The reaction occurs by drying at the air–water interfaces. Abstract For the emergence of life, the abiotic synthesis of RNA from its monomers is a central step.
Avinash Vicholous Dass, Sreekar Wunnava, Juliette Langlais, Beatriz von der Esch, Maik Krusche, Lennard Ufer, Nico Chrisam, Romeo C. A. Dubini, Florian Gartner, Severin Angerpointner, Christina F. Dirscherl, Petra Rovó, Christof B. Mast, Judit E. Šponer, Christian Ochsenfeld, Erwin Frey, Dieter Braun   +16 more
wiley   +1 more source

Fermionic R-Operator for the Fermion Chain Model [PDF]

, 1998
The integrability of the one-dimensional (1D) fermion chain model is investigated in the framework of the Quantum Inverse Scattering Method (QISM). We introduce a new R-operator for the fermion chain model, which is expressed in terms of the fermion operators. The R-operator satisfies a new type of the Yang-Baxter relation with fermionic L-operator. We
arxiv   +1 more source

Introduction to Causal Fermion Systems [PDF]

arXiv, 2021
This paper is dedicated to give a concise introduction to the theory of causal fermion systems. After putting the theory of causal fermion systems into the historical context, we recall fundamental physical preliminaries. Afterwards, we enter the underlying ideas of the principle of the fermionic projector and clarify its connection to causal fermion ...
arxiv  

Zero-energy modes, fractional fermion numbers and the index theorem in a vortex-Dirac fermion system [PDF]

Symmetry 12, 373 (2020), 2020
Physics of topological materials have attracted much attention from both physicists and mathematicians recently. The index and the fermion number of Dirac fermions play an important role in topological insulators and topological superconductors. A zero-energy mode exists when Dirac fermions couple to objects with soliton-like structure such as kinks ...
arxiv   +1 more source