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- S. Davidson, A. de Gouvêa, +6 authors H. Murayama
- 2008

During 2004, four divisions of the American Physical Society commissioned a study of neutrino physics to take stock of where the field is at the moment and where it is going in the near and far future. Several working groups looked at various aspects of this vast field. The summary was published as a main report entitled " The Neutrino Matrix " accompanied… (More)

1 Abstract We present a utilitarian review of the family of matrix groups Sp(2n, ℜ), in a form suited to various applications both in optics and quantum mechanics. We contrast these groups and their geometry with the much more familiar Eu-clidean and unitary geometries. Both the properties of finite group elements and of the Lie algebra are studied, and… (More)

- Pran Natha, Brent Nelson, +12 authors Bhaskar Dutta
- 2010

- E Accomando, R Arnowitt, B Dutta, Y Santoso
- 2000

The neutralino-proton cross section is examined for supergravity models with R-parity invariance with universal and non-universal soft breaking. The region of parameter space that dark matter detectors are currently (or will be shortly) sensitive i.e. (0.1 − 10) × 10 −6 pb, is examined. For universal soft breaking (mSUGRA), detectors with sensitivity σ ˜ χ… (More)

- R Arnowitt, B Dutta, Y Santoso
- 2001

Coannihilation effects in neutralino relic density calculations are examined for a full range of supersymmetry parameters including large tan β and large A 0 for stau, chargino, stop and sbottom coannihilation with the neutralino. Supergravity models possessing grand unification with universal soft breaking (mSUGRA), models with nonuniversal soft breaking… (More)

- R. N. Mohapatra, S. Antusch, +29 authors L. Wolfenstein
- 2004

After a brief overview of the present knowledge of neutrino masses and mixing, we summarize what can be learned about physics beyond the standard model from the various proposed neu-trino experiments. We also comment on the impact of the experiments on our understanding of the origin of the matter–antimatter asymmetry of the Universe as well as what can be… (More)

- R Arnowitt, B Dutta
- 2002

We consider here the constraints in SUGRA models on the SUSY parameter space due to current experimental bounds on the light Higgs mass m h , the b → sγ decay, the amount of neutralino cold dark matter Ωh 2 , and the muon magnetic moment. Models with universal soft breaking (mSUGRA) and non-universal gaugino or Higgs masses at M G are examined. For mSUGRA,… (More)

A general analysis of squeezing transformations for two mode systems is given based on the four dimensional real symplectic group Sp(4, ℜ). Within the framework of the unitary metaplectic representation of this group, a distinction between compact photon number conserving and noncompact photon number nonconserving squeezing transformations is made. We… (More)

- R Arnowitt, B Dutta, Y Santoso
- 2000

The range of neutralino-proton cross sections for R-parity preserving super-gravity models with GUT scale unification of the gauge coupling constants is examined. The models considered here are mSUGRA, models with non universal soft breaking and D-brane models. It is found that the current dark matter detectors are sampling significant parts of the SUSY… (More)

We study the feasibility of detecting the stau neutralino (˜ τ 1-˜ χ 0 1) coannihilation region at the LHC using tau (τ) leptons. The signal is characterized by multiple low energy τ leptons from˜χ 0 2 → τ ˜ τ 1 → τ τ ˜ χ 0 1 decays, where the˜τ 1 and˜χ 0 1 mass difference (∆M) is constrained to be 5-15 GeV by current experimental bounds including the bound… (More)