2004/05/17 by Utpal Chattopadhyay, Pran Nath
Physics and Astronomy · #Anisotropy #Black Holes and Theoretical Physics #CMB cold spot #Cosmic microwave background #Cosmology and Gravitation Theories #Electroweak interaction #Higgs boson #Particle physics #Particle physics theoretical and experimental studies #Physics #Quantum mechanics #Superpartner #Symmetry breaking #astro-ph #hep-ph #hep-th
paper · pdf · doi:10.1103/physrevd.70.096009
published as Phys.Rev. D70 (2004) 096009 · 29 pages, 10 figures
arxiv created 2004/05/17 · openalex publication_date 2004/11/18 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
An analysis of soft breaking under the constraint of modular invariance is given. The role of dilaton and moduli dependent front factors in achieving a modular invariant Vsoft is emphasized. Further, it is shown that in string models tan\ensuremathβ is no longer a free parameter but is determined in terms of \ensuremathαstring and the other soft parameters by the constraints of modular invariance and radiative electroweak symmetry breaking. The above framework is then used to analyze the neutralino relic density consistent with the Wilkinson Microwave Anisotropy Probe (WMAP) data at self-dual points in the K"ahler and complex structure moduli. One finds that the combined set of constraints arising from modular invariant soft breaking, radiative electroweak symmetry breaking, and WMAP lead to upper limits on sparticle masses for \ensuremathμ>0. These limits are investigated for a class of models and found to lie within reach of the Tevatron and the Large Hadron Collider. Further, an analysis of the neutralino-proton cross section shows that dark matter in these models can be explored in CDMS (Soudan), GENIUS, and ZEPLIN. While the analysis is carried out within the general framework of heterotic strings, the possibility that the results of the analysis may extend to a broader class of string models, such as models based on intersecting D branes, is also discussed.