869 research outputs found
Anomalous U(1) D-term contribution in type I string models
We study the D-term contribution for anomalous U(1) symmetries in type I string models and derive a general formula for the D-term contribution, assuming that the dominant source of supersymmetry breaking is given by the F terms of the dilaton, (overall) moduli, or twisted moduli fields. On the basis of the formula, we also point out that there are several features different from the case of heterotic string models. The differences originate from the different forms of the Kahler potential between twisted moduli fields in type I string models and the dilaton field in heterotic string models.ArticlePHYSICAL REVIEW D. 69(8):086004 (2004)journal articl
Common Mistakes in Anthurium Blight Control Pracitices: An Aid to Anthurium Blight Management
Recommendations for practices to control anthurium blight included propagation with tissue culture, daily renewal of disinfestation solution, caution in applying fertilizer, nematode control, midday irrigation, drainage improvement, frequent roguing, and keeping medium pH between 5.5 and 7
D-term Inflation and Nonperturbative Kahler Potential of Dilaton
We study the -term inflation scenario with a nonperturbative K\"ahler
potential of the dilaton field. Although the FI term which leads an
inflationary expansion is given by the derivative of the K\"ahler potential
with respect to the dilaton in heterotic string models with anomalous U(1), the
too large magnitude is problematic for a viable -term inflation. In this
paper, we point out that the K\"ahler potential with a nonperturbative term can
reduce the magnitude of FI term to desired values while both the dilaton
stabilization and -term domination in the potential are realized by
nonperturbative superpotential.Comment: 13 pages, latex, 3 figure
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