Results 51 to 60 of about 1,031,042 (243)

Solving the hierarchy problem with brane crystals [PDF]

Physics Letters B, 2001
The brane world scenario advocated by Arkani-Hamed et al. transmutes the hierarchy problem into explaining why extra dimensions have sizes much larger than the fundamental scale. In this paper we discuss possible solutions to this problem by considering the compactified dimensions to be populated by a large number of branes in a crystal lattice.
Corley, S., Lowe, D. A.
openaire   +2 more sources

Trinification, the Hierarchy Problem and Inverse Seesaw Neutrino Masses

, 2011
In minimal trinification models light neutrino masses can be generated via a radiative see-saw mechanism, where the masses of the right-handed neutrinos originate from loops involving Higgs and fermion fields at the unification scale.
Christophe Cauet, F. Deppisch, Heinrich Päs, S. L. Glashow, Sören Wiesenfeldt   +4 more
core   +1 more source

Enhancing Synaptic Plasticity and Multistate Retention of Organic Neuromorphic Devices Using Anion‐Excessive Gel Electrolyte

Advanced Functional Materials, EarlyView.
Anion‐excessive gel‐based organic synaptic transistors (AEG‐OSTs) that can maintain electrical neutrality are developed to enhance synaptic plasticity and multistate retention. Key improvement is attributed to the maintenance of electrical neutrality in the electrolyte even after electrochemical doping, which reduces the Coulombic force acting on ...
Yousang Won, Jeongwoo Lee, Hyunwook Kim, Joon Hak Oh   +3 more
wiley   +1 more source

TeV symmetry and the little hierarchy problem [PDF]

Journal of High Energy Physics, 2003
Constraints from precision electroweak measurements reveal no evidence for new physics up to 5 - 7 TeV, whereas naturalness requires new particles at around 1 TeV to address the stability of the electroweak scale. We show that this "little hierarchy problem" can be cured by introducing a symmetry for new particles at the TeV scale.
Cheng, Hsin-Chia, Low, Ian
openaire   +2 more sources

Three‐Dimensional Hierarchical Nanowire‐Networks with Deep‐Focus Tolerance and Adhesion Robustness for Harsh‐Environment SERS Sensing

Advanced Functional Materials, EarlyView.
A 3D nanowire‐network SERS substrate with robust adhesion is developed, featuring pronounced z‐direction optical activity, ultralow detection limit (1.5 × 10−13 M), and excellent signal uniformity (RSD < 10%). Enabled by enhanced light scattering, increased optical density of states, and structural reinforcement, the substrate demonstrates stable, high‐
Jinglai Duan, Wentao Wang, Xiu Liang, Yongliang Zhang, Jie Liu, Yu Bai, Dangyuan Lei   +6 more
wiley   +1 more source

Universal Electronic‐Structure Relationship Governing Intrinsic Magnetic Properties in Permanent Magnets

Advanced Functional Materials, EarlyView.
Permanent magnets derive their extraordinary strength from deep, universal electronic‐structure principles that control magnetization, anisotropy, and intrinsic performance. This work uncovers those governing rules, examines modern modeling and AI‐driven discovery methods, identifies critical bottlenecks, and reveals electronic fingerprints shared ...
Prashant Singh
wiley   +1 more source

Beta Functions of Orbifold Theories and the Hierarchy Problem

, 1999
We examine a class of gauge theories obtained by projecting out certain fields from an N=4 supersymmetric SU(N) gauge theory. These theories are non-supersymmetric and in the large N limit are known to be conformal.
A. A. Tseytlin, A. Hanany, A. Lawrence, A. Nelson, B. Holdom, B. Holdom, B. Holdom, C. N. Leung, Csaba Csáki, I. Jack, I. R. Klebanov, I. R. Klebanov, J. Maldacena, J. Polchinski, J. Terning, John Terning, K. Yamawaki, M. Bando, M. Bershadsky, M. Bershadsky, M. E. Machacek, M. E. Machacek, M. E. Machacek, M. Schmaltz, P. Cvitanovic, P. H. Frampton, P. H. Frampton, P. H. Frampton, P. H. Frampton, S. Coleman, S. Kachru, S. Kachru, S. Kachru, T. Appelquist, T. Appelquist, T. Appelquist, T. Appelquist, T. Appelquist, T. W. Appelquist, W. A. Bardeen, W. Lucha, W. Lucha, Witold Skiba, Y. Oz, Z. Kakushadze, Z. Kakushadze, Z. Kakushadze   +46 more
core   +2 more sources

Covalent Organic Frameworks for Photocatalytic CO2 Reduction: Metal Integration Principles, Strategies and Functions

Advanced Functional Materials, EarlyView.
Covalent organic frameworks (COFs) with metals have been recognized as versatile platforms for photocatalytic CO2 reduction (CO2PRR). Herein, an overview of metal integration strategies for COFs is systematically summarized. Regulatory mechanisms and structure–activity relationships between metal integration and COF‐based CO2PRR are emphasized.
Jie He, Minxian Zhang, Jinqiang Zhang, Hongqi Sun, Shaobin Wang, Xiaoguang Duan   +5 more
wiley   +1 more source

The Renormalization Group, Systems of Units and the Hierarchy Problem

, 2007
In the context of the Renormalization Group (RG) for gravity I discuss the role of field rescalings and their relation to choices of units. I concentrate on a simple Higgs model coupled to gravity, where natural choices of units can be based on Newton's ...
Arkani-Hamed N, Bousso R, Dou D, Duff M J, Gomez C, Klebanov I R, Lauscher O, Lauscher O, Maldacena J, Pawlowski J M, Percacci R, Rattazzi R, Roberto Percacci, Weinberg S, Wilczek F, Wilczek F, Witten E   +16 more
core   +1 more source

Dense Nanofibrillar Collagen–Silica Hybrids with High Strength and ECM‐Mimetic Tissue Integration

Advanced Functional Materials, EarlyView.
Dense nanofibrillar collagen–silica hybrids are engineered by synchronizing collagen fibrillogenesis with silica condensation, producing printable scaffolds that unexpectedly approach native extracellular matrix organization and strength. These cell‐free constructs guide endogenous cell‐infiltration, enable localized matrix remodeling, and integrate ...
Norein Norein, Shima Tavakoli, Philipp Wolf, Xie Ling, Veronica Rondahl, Klaus Leifer, Gry Hulsart‐Billström, Jöns Hilborn   +7 more
wiley   +1 more source