Standard D-term inflation is studied in the framework of supergravity. D-term inflation produces cosmic strings; however, it can still be compatible with cosmic microwave background (CMB) measurements without invoking any new physics. The cosmic strings contribution to the CMB data is not constant, nor dominant, contrary to some previous results. Using current CMB measurements, the free parameters (gauge and superpotential couplings, as well as the Fayet-Iliopoulos term) of D-term inflation are constrained.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1103/PhysRevLett.94.011303 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
A microscopic model for inflation from supersymmetry breaking.
Eur Phys J C Part Fields
July 2019
3Department of Physics, Faculty of Science, Chulalongkorn University, Phayathai Road, Pathumwan, Bangkok, 10330 Thailand.
We have proposed recently a framework for inflation driven by supersymmetry breaking with the inflaton being a superpartner of the goldstino, that avoids the main problems of supergravity inflation, allowing for: naturally small slow-roll parameters, small field initial conditions, absence of a (pseudo)scalar companion of the inflaton, and a nearby minimum with tuneable cosmological constant. It contains a chiral multiplet charged under a gauged R-symmetry which is restored at the maximum of the scalar potential with a plateau where inflation takes place. The effective field theory relies on two phenomenological parameters corresponding to corrections to the Kähler potential up to second order around the origin.
View Article and Find Full Text PDFD-term inflation, cosmic strings, and consistency with cosmic microwave background measurements.
Phys Rev Lett
January 2005
Institut d'Astrophysique de Paris, GReCO, FRE 2435-CNRS, 98bis boulevard Arago, 75014 Paris, France.
Standard D-term inflation is studied in the framework of supergravity. D-term inflation produces cosmic strings; however, it can still be compatible with cosmic microwave background (CMB) measurements without invoking any new physics. The cosmic strings contribution to the CMB data is not constant, nor dominant, contrary to some previous results.
View Article and Find Full Text PDFD-term inflation without cosmic strings.
Phys Rev Lett
June 2004
Department of Physics and Astronomy, University of Sussex, Brighton BN1 9QJ, United Kingdom.
We present a superstring-inspired version of D-term inflation that does not lead to cosmic string formation and appears to satisfy the current cosmic microwave background constraints. It differs from minimal D-term inflation by a second pair of charged superfields that makes the strings nontopological (semilocal). The strings are also Bogomol'nyi-Prasad-Sommerfield strings, so the scenario is expected to survive supergravity corrections.
View Article and Find Full Text PDFAntenatal endotoxin and glucocorticoid effects on lung morphometry in preterm lambs.
Pediatr Res
December 2000
Division of Clinical Sciences, Telethon Institute for Child Health Research, Perth, Australia.
In utero inflammation may accelerate fetal lung maturation but may also play a role in the pathogenesis of chronic lung disease. We examined the impact of endotoxin, a potent proinflammatory stimulus, on structural and functional maturation of preterm sheep lungs. Date bred ewes received 20 mg Escherichia coli endotoxin or saline by ultrasound guided intra-amniotic injection at 119 d gestation.
View Article and Find Full Text PDFHigh-frequency oscillatory ventilation: effects on lung function, mechanics, and airway cytokines in the immature baboon model for neonatal chronic lung disease.
Am J Respir Crit Care Med
November 2000
Southwest Foundation for Biomedical Research, San Antonio, Texas, USA.
Acute lung injury models demonstrate that high-frequency oscillatory ventilation (HFOV) improves lung function, mechanics, and histopathology with reduced inflammatory mediators. Neither human HFOV trials nor premature animal studies have adequately evaluated these factors during prolonged HFOV. The objective of this study was to compare the effect of prolonged HFOV with low tidal volume (VT) positive pressure ventilation (LV-PPV) in an immature baboon model for neonatal chronic lung disease (CLD).
View Article and Find Full Text PDFWant AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!