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Title: Hypercharged Anomaly Mediation

Abstract

We show that, in string models with the minimal supersymmetric standard model residing on D-branes, the bino mass can be generated in a geometrically separated hidden sector. Hypercharge mediation thus naturally teams up with anomaly mediation. The mixed scenario predicts a distinctive yet viable superpartner spectrum, provided that the ratio {alpha} between the bino and gravitino mass lies in the range 0.05 < or approx. |{alpha}| < or approx. 0.25 and m{sub 3/2} > or approx. 35 TeV. We summarize some of the experimental signatures of this scenario.

Authors:
 [1]; ;  [2]
  1. School of Natural Sciences, Institute for Advanced Study, Princeton, New Jersey 08540 (United States)
  2. Department of Physics, Princeton University, Princeton, New Jersey 08544 (United States)
Publication Date:
OSTI Identifier:
21123806
Resource Type:
Journal Article
Resource Relation:
Journal Name: Physical Review Letters; Journal Volume: 100; Journal Issue: 13; Other Information: DOI: 10.1103/PhysRevLett.100.131804; (c) 2008 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; D-BRANES; GRAVITONS; HYPERCHARGE; MASS; STANDARD MODEL; STRING MODELS; SUPERSYMMETRY; TEV RANGE 10-100

Citation Formats

Dermisek, Radovan, Verlinde, Herman, and Wang, L.-T.. Hypercharged Anomaly Mediation. United States: N. p., 2008. Web. doi:10.1103/PHYSREVLETT.100.131804.
Dermisek, Radovan, Verlinde, Herman, & Wang, L.-T.. Hypercharged Anomaly Mediation. United States. doi:10.1103/PHYSREVLETT.100.131804.
Dermisek, Radovan, Verlinde, Herman, and Wang, L.-T.. Fri . "Hypercharged Anomaly Mediation". United States. doi:10.1103/PHYSREVLETT.100.131804.
@article{osti_21123806,
title = {Hypercharged Anomaly Mediation},
author = {Dermisek, Radovan and Verlinde, Herman and Wang, L.-T.},
abstractNote = {We show that, in string models with the minimal supersymmetric standard model residing on D-branes, the bino mass can be generated in a geometrically separated hidden sector. Hypercharge mediation thus naturally teams up with anomaly mediation. The mixed scenario predicts a distinctive yet viable superpartner spectrum, provided that the ratio {alpha} between the bino and gravitino mass lies in the range 0.05 < or approx. |{alpha}| < or approx. 0.25 and m{sub 3/2} > or approx. 35 TeV. We summarize some of the experimental signatures of this scenario.},
doi = {10.1103/PHYSREVLETT.100.131804},
journal = {Physical Review Letters},
number = 13,
volume = 100,
place = {United States},
year = {Fri Apr 04 00:00:00 EDT 2008},
month = {Fri Apr 04 00:00:00 EDT 2008}
}
  • A striking consequence of supersymmetry breaking communicated purely via the superconformal anomaly is that the gaugino masses are proportional to the gauge {beta} functions. This result, however, is not unique to anomaly mediation. We present examples of ''generalized'' gauge-mediated models with messengers in standard model representations that give nearly identical predictions for the gaugino masses, but positive (mass){sup 2} for all sleptons. There are remarkable similarities between an anomaly-mediated model with a small additional universal mass added to all scalars and the gauge-mediated models with a long-lived W-ino next-to-lightest supersymmetric particle, leading to only a small set of observables thatmore » provide robust distinguishing criteria. These include ratios of the heaviest to lightest selectrons, smuons, and top squarks. The sign of the gluino soft mass is an unambiguous distinction, but requires measuring a difficult class of one-loop radiative corrections to sparticle interactions. A high precision measurement of the Higgs-boson-b-b(bar sign) coupling is probably the most promising interaction from which this sign might be extracted. (c) 2000 The American Physical Society.« less
  • No abstract prepared.
  • No abstract prepared.
  • We propose an electroweak model which is compatible with the UV insensitive anomaly mediated supersymmetry breaking. The model is an extension of the NMSSM by adding vector-like matter fields which can drive the soft scalar masses of the singlet Higgs field negative and the successful electroweak symmetry breaking is achieved. Viable parameter regions are found to preserve perturbativity of all the coupling constants up to the Planck scale. With this success, the model becomes a perfect candidate of physics beyond the standard model without the FCNC and CP problem. The cosmology is also quite interesting. The lightest neutralino is themore » wino which is a perfect cold dark matter candidate assuming the non-thermal production from the gravitino decay. There is no gravitino problem because it decays before the BBN era, and thus the thermal leptogenesis works. The cosmological domain wall problem inherent in the NMSSM is absent since the Z_3 symmetry is broken by the QCD instanton effect in the presence of the vector-like quarks. We also briefly comment on a possible solution to the strong CP problem a la the Nelson-Barr mechanism.« less
  • The seesaw mechanism that explains the small neutrino masses comes naturally with supersymmetric (SUSY) grand unification and leptogenesis. However, the framework suffers from the SUSY flavor and CP problems, and has a severe cosmological gravitino problem. We propose anomaly mediation as a simple solution to all these problems, which is viable once supplemented by the D-terms for U(1)_Y and U(1)_B-L. Even though the right-handed neutrino mass explicitly breaks U(1)_B-L and hence reintroduces the flavor problem, we show that it lacks the logarithmic enhancement and poses no threat to the framework. The thermal leptogenesis is then made easily consistent with themore » gravitino constraint.« less