Matches in SemOpenAlex for { <https://semopenalex.org/work/W2132491745> ?p ?o ?g. }
Showing items 1 to 95 of
95
with 100 items per page.
- W2132491745 abstract "We review our understanding of spin-1 and spin-2 massless particles as mediators of long-range forces. We discuss how a quantum description of such particles that is compatible with Lorentz covariance leads to gauge invariance, a mathematical redundancy in the description of the physics. We discuss the Weinberg-Witten theorem, which underlines the need for gauge invariance in relativistic theories with massless mediators of higher spin. This leads us to consider a class of models in which long-range interactions are mediated by the Goldstone bosons of spontaneous Lorentz violation. Since the Lorentz symmetry is realized non-linearly in the Goldstones, these models could evade the Weinberg-Witten theorem and the need for gauge invariance. In the case of gravity, the broken symmetry would protect the theory from having non-zero cosmological constant, while the compositeness of the graviton could provide a solution to the perturbative non-renormalizability of gravity. Next we consider the phenomenology of spontaneous Lorentz violation and the experimental limits thereon. We find the general low-energy effective action of the Goldstones of this kind of symmetry breaking minimally coupled to gravity. We compare this effective theory to the ghost condensate that has been proposed in the literature as a model for gravity in a Higgs phase. We compute the modification to Newton's law from this mechanism and discuss observational limits on this kind of Lorentz violation from solar system tests of gravity and from gravitational Cherenkov radiation of cosmic rays. We then summarize the cosmological constant problems and show that models in which a scalar field causes super-acceleration of the universe generally exhibit instabilities connected to violation of the null-energy condition. We discuss how the equation of state evolves in a universe where the dark energy is caused by a ghost condensate. We comment on the anthropic argument for a small cosmological constant and how it is weakened if the inflaton self-coupling varies over the landscape of possible universes. Finally, we discuss the reverse sprinkler, a problem in elementary fluid mechanics that had eluded a definitive treatment for decades." @default.
- W2132491745 created "2016-06-24" @default.
- W2132491745 creator A5048908665 @default.
- W2132491745 date "2006-01-01" @default.
- W2132491745 modified "2023-09-23" @default.
- W2132491745 title "Topics in theoretical particle physics and cosmology beyond the standard model" @default.
- W2132491745 cites W1451104134 @default.
- W2132491745 cites W1503210002 @default.
- W2132491745 cites W1625053673 @default.
- W2132491745 cites W1667125974 @default.
- W2132491745 cites W1676019512 @default.
- W2132491745 cites W1676990606 @default.
- W2132491745 cites W1964800142 @default.
- W2132491745 cites W1986629118 @default.
- W2132491745 cites W2037127091 @default.
- W2132491745 cites W2039636978 @default.
- W2132491745 cites W2052959638 @default.
- W2132491745 cites W2058360989 @default.
- W2132491745 cites W2077349716 @default.
- W2132491745 cites W2085671314 @default.
- W2132491745 cites W2088227965 @default.
- W2132491745 cites W2483424394 @default.
- W2132491745 cites W2567836125 @default.
- W2132491745 cites W3007754162 @default.
- W2132491745 cites W175483674 @default.
- W2132491745 doi "https://doi.org/10.7907/9vsj-xw82." @default.
- W2132491745 hasPublicationYear "2006" @default.
- W2132491745 type Work @default.
- W2132491745 sameAs 2132491745 @default.
- W2132491745 citedByCount "2" @default.
- W2132491745 crossrefType "dissertation" @default.
- W2132491745 hasAuthorship W2132491745A5048908665 @default.
- W2132491745 hasConcept C108568745 @default.
- W2132491745 hasConcept C109214941 @default.
- W2132491745 hasConcept C121332964 @default.
- W2132491745 hasConcept C124017977 @default.
- W2132491745 hasConcept C125881977 @default.
- W2132491745 hasConcept C130044071 @default.
- W2132491745 hasConcept C151389596 @default.
- W2132491745 hasConcept C158129726 @default.
- W2132491745 hasConcept C181830111 @default.
- W2132491745 hasConcept C204795200 @default.
- W2132491745 hasConcept C33332235 @default.
- W2132491745 hasConcept C40263606 @default.
- W2132491745 hasConcept C5667645 @default.
- W2132491745 hasConcept C62520636 @default.
- W2132491745 hasConcept C62583473 @default.
- W2132491745 hasConcept C71993908 @default.
- W2132491745 hasConcept C74650414 @default.
- W2132491745 hasConcept C84114770 @default.
- W2132491745 hasConceptScore W2132491745C108568745 @default.
- W2132491745 hasConceptScore W2132491745C109214941 @default.
- W2132491745 hasConceptScore W2132491745C121332964 @default.
- W2132491745 hasConceptScore W2132491745C124017977 @default.
- W2132491745 hasConceptScore W2132491745C125881977 @default.
- W2132491745 hasConceptScore W2132491745C130044071 @default.
- W2132491745 hasConceptScore W2132491745C151389596 @default.
- W2132491745 hasConceptScore W2132491745C158129726 @default.
- W2132491745 hasConceptScore W2132491745C181830111 @default.
- W2132491745 hasConceptScore W2132491745C204795200 @default.
- W2132491745 hasConceptScore W2132491745C33332235 @default.
- W2132491745 hasConceptScore W2132491745C40263606 @default.
- W2132491745 hasConceptScore W2132491745C5667645 @default.
- W2132491745 hasConceptScore W2132491745C62520636 @default.
- W2132491745 hasConceptScore W2132491745C62583473 @default.
- W2132491745 hasConceptScore W2132491745C71993908 @default.
- W2132491745 hasConceptScore W2132491745C74650414 @default.
- W2132491745 hasConceptScore W2132491745C84114770 @default.
- W2132491745 hasLocation W21324917451 @default.
- W2132491745 hasOpenAccess W2132491745 @default.
- W2132491745 hasPrimaryLocation W21324917451 @default.
- W2132491745 hasRelatedWork W1894418956 @default.
- W2132491745 hasRelatedWork W1977384616 @default.
- W2132491745 hasRelatedWork W1998260652 @default.
- W2132491745 hasRelatedWork W2028055204 @default.
- W2132491745 hasRelatedWork W2100171376 @default.
- W2132491745 hasRelatedWork W2102594699 @default.
- W2132491745 hasRelatedWork W2118205512 @default.
- W2132491745 hasRelatedWork W2605650164 @default.
- W2132491745 hasRelatedWork W2737660483 @default.
- W2132491745 hasRelatedWork W2988276932 @default.
- W2132491745 hasRelatedWork W3001287962 @default.
- W2132491745 hasRelatedWork W3035872854 @default.
- W2132491745 hasRelatedWork W3098145354 @default.
- W2132491745 hasRelatedWork W3098707621 @default.
- W2132491745 hasRelatedWork W3100819998 @default.
- W2132491745 hasRelatedWork W3100964282 @default.
- W2132491745 hasRelatedWork W3101419151 @default.
- W2132491745 hasRelatedWork W3105822145 @default.
- W2132491745 hasRelatedWork W3105899698 @default.
- W2132491745 hasRelatedWork W3123757732 @default.
- W2132491745 isParatext "false" @default.
- W2132491745 isRetracted "false" @default.
- W2132491745 magId "2132491745" @default.
- W2132491745 workType "dissertation" @default.