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1.
R-charge Conservation and More in Factorizable and Non-Factorizable Orbifolds / Cabo Bizet, Nana Geraldine (Bonn U. ; Havana, CEADEN ; CERN) ; Kobayashi, Tatsuo (Kyoto U.) ; Mayorga Pena, Damian Kaloni (Bonn U.) ; Parameswaran, Susha L. (Leibniz U., Hannover) ; Schmitz, Matthias (Bonn U.) ; Zavala, Ivonne (Groningen U.)
We consider the string theory origin of R-charge conservation laws in heterotic orbifold compactifications, deriving the corresponding string coupling selection rule for factorizable and non-factorizable orbifolds, with prime ordered and non-prime ordered point groups. R-charge conservation arises due to symmetries among the worldsheet instantons that can mediate the couplings. [...]
arXiv:1301.2322; CERN-PH-TH-2012-365; KUNS-2431; CERN-PH-TH-2012-365.- 2013 - 35 p. - Published in : JHEP 05 (2013) 076 Fulltext: PDF; Springer Open Access article: PDF; External link: Preprint
2.
RG-invariant Sum Rule in a Generalization of Anomaly Mediated SUSY Breaking Models / Carena, Marcela (CERN ; Fermilab) ; Huitu, Katri (Helsinki U.) ; Kobayashi, Tatsuo (Kyoto U.)
We study a generalization of anomaly-mediated supersymmetry breaking (AMSB) scenarios, under the assumption that the effects of the high-scale theory do not completely decouple and D-term type contributions can be therefore present. We investigate the effect of such possible D-term additional contributions to soft scalar masses by requiring that, for non-vanishing, renormalizable Yukawa couplings $Y^{ijk} $, the sum of squared soft supersymmetry breaking mass parameters, $M^2_{ijk} \equiv m_i^2+m_j^2+m_k^2$, is RG-invariant, in the sense that it becomes independent of the specific ultraviolet boundary conditions as it occurs in the AMSB models. [...]
hep-ph/0003187; CERN-TH-2000-084; FERMILAB-PUB-00-013-T; HIP-1999-76-TH; KUNS-1650; CERN-TH-2000-084; FERMILAB-PUB-2000-013-T; HIP-1999-76-TH; KUNS-1650.- Geneva : CERN, 2001 - 24 p. - Published in : Nucl. Phys. B 592 (2001) 164-182 Access to fulltext document: 0003187 - PDF; kobayashi - PS.GZ; Fulltext: PDF; External links: Fulltext; Fermilab Library Server (fulltext available)
In : 8th International Conference on Supersymmetries in Physics, CERN, Geneva, Switzerland, 26 Jun - 1 Jul 2000, pp.e-proc. - Please contact the library if you need to access this document.

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9 Kobayashi, Toshiaki
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26 Kobayashi, Toshiyuki
3 Kobayashi, Tsunehiro
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