Results 81 to 90 of about 20,702,128 (245)

Relic density of neutralino dark matter in supergravity models [PDF]

, 1997
We calculate the relic density $({\ensuremath{\Omega}}_{{\ensuremath{\chi}}_{1}^{0}}{h}^{2})$ of neutralino dark matter in supergravity models with radiative electroweak symmetry breaking, for values of the Higgs sector parameter $\mathrm{tan}\ensuremath{
V. Barger, C. Kao
semanticscholar   +1 more source

New constraints on supergravity models from b-->s gamma. [PDF]

Physical Review D, Particles and fields, 1994
We perform a detailed study of the constraints from [ital b][r arrow][ital s][gamma] on a large class of supergravity models, including generic four-parameter supergravity models, the minimal SU(5) supergravity model, and SU(5)[times]U(1) supergravity ...
López, Nanopoulos, Wang, Zichichi
semanticscholar   +1 more source

Modeling General Asymptotic Calabi–Yau Periods

Fortschritte der Physik, Volume 73, Issue 7, July 2025.
Abstract In the quest to uncovering the fundamental structures that underlie some of the asymptotic Swampland conjectures the authors initiate the general study of asymptotic period vectors of Calabi–Yau manifolds. The strategy is to exploit the constraints imposed by completeness, symmetry, and positivity, which are formalized in asymptotic Hodge ...
Brice Bastian, Thomas W. Grimm, Damian van de Heisteeg   +2 more
wiley   +1 more source

Generalised U-dual solutions via ISO(7) gauged supergravity

Journal of High Energy Physics, 2022
We study a solution generating technique in supergravity which can be viewed as a generalised version of U-duality, taking solutions of type IIA supergravity on a 6-sphere with RR flux to new solutions of 11-dimensional supergravity.
Chris D. A. Blair, Sofia Zhidkova
doaj   +1 more source

Electrodeposited Manganese Dioxides and Their Composites as Electrocatalysts for Energy Conversion Reactions

ChemSusChem, Volume 18, Issue 5, March 3, 2025.
This review focuses on the electrochemical synthesis of MnO2 materials and their composites and their application as electrocatalysts for OER and HER reactions for the conversion of renewable energy into chemical fuels. The electrocatalytic function of electrodeposited MnO2 for ORR and bifunctional ORR/OER for efficient operation of fuel cells and ...
Masaharu Nakayama, Wataru Yoshida
wiley   +1 more source

Chromo-natural inflation in Supergravity

Physics Letters B, 2018
We present supergravity realizations of chromo-natural inflationary models. We show that by using superpotentials with “imaginary” holomorphic functions of the inflaton one can obtain effective theories of inflation that are also consistent truncations ...
Gianguido Dall'Agata
doaj  

On AdS4 superspace and supergravity

Journal of High Energy Physics
In the N = 1 superspace, AdS4 supersymmetry is realized as the non-linear super coordinate transformations. The fermionic coordinates form a faithful non-linear representation of supersymmetry on their own.
Chen-Xu Han, Zhao-Long Wang, Yi Yan
doaj   +1 more source

Physicochemical vs Electrochemical Technologies for Metal Recovery – Main Insights, Comparison, Complementarity and Challenges

Chemistry–Methods, Volume 5, Issue 3, March 2025.
Different electrochemical and physicochemical methods employed for metal recovery and removal from various sources are presented herein, along with their key performance indicators. The main strengths and weaknesses of each technology are discussed in a comparative manner, when possible.
Stefanos Mourdikoudis, Xochitl Dominguez‐Benetton   +1 more
wiley   +1 more source

Double Copy From Tensor Products of Metric BV■‐Algebras

Fortschritte der Physik, Volume 73, Issue 1-2, February 2025.
Abstract Field theories with kinematic Lie algebras, such as field theories featuring color–kinematics duality, possess an underlying algebraic structure known as BV■‐algebra. If, additionally, matter fields are present, this structure is supplemented by a module for the BV■‐algebra.
Leron Borsten, Branislav Jurčo, Hyungrok Kim, Tommaso Macrelli, Christian Saemann, Martin Wolf   +5 more
wiley   +1 more source

Geometric Relational Framework for General‐Relativistic Gauge Field Theories

Fortschritte der Physik, Volume 73, Issue 1-2, February 2025.
Abstract It is recalled how relationality arises as the core insight of general‐relativistic gauge field theories from the articulation of the generalized hole and point‐coincidence arguments. Hence, a compelling case for a manifestly relational framework ensues naturally.
Jordan T. François, Lucrezia Ravera
wiley   +1 more source