HEP Monday Seminar Abstracts

October 19, 2009
           Robert Bernstein, Fermilab, A New High Sensitivity Search for Muon-to-Electron Conversion at Fermilab 

 The Mu2e collaboration will search for coherent, neutrino-less conversion of muons into electrons in the field of a nucleus with a sensitivity improvement of approximately 10,000
over existing limits. Such a lepton flavor-violating reaction probes new physics at a scale unavailable by direct searches at either present or planned high energy colliders. The physics
motivation for Mu2e and the design of the muon beamline and spectrometer will be presented, along with a scheme by which the experiment can be mounted in the present Fermilab
accelerator complex. We will also examine the prospects for increased sensitivity of as much as two orders-of-magnitude at the proposed Fermilab Project X Linac.

**Tuesday**, October 27, 2009 - 248 Lauritsen.
Robert Nelson, CU-Boulder, A Measurement of Neutrino Induced Charged Current Neutral Pion Production at MiniBooNE

The Mini-Booster-Neutrino-Experiment at Fermilab has recorded the largest sample of muon neutrino interactions (~400,000) at the 1 GeV scale on a nuclear target (CH2) to date.
This allows for the precise measurement of many neutrino cross-sections that will aid in the
understanding of event rates in future oscillation searches (such as T2K). I will discuss
an overview of the MiniBooNE suite of
cross-section measurements with particular focus on charged current neutral pion production (CCpi0). This measurement required the design
of a specialty fitter to reconstruct the muon and the pion in the event where the pion is found from the Cherenkov rings produced by its daughter photons. This fitter reconstructs all
three Cherenkov rings in the event. This allows for the measurement of many kinematic
quantities, most importantly the incident neutrino's energy. With this measurement we can
report various, previously unmeasured,
differential cross-sections along with the total CCpi0 cross-section as a function of neutrino energy.

November 2, 2009
           Daniel Whiteson,  UCI, CDF in its prime: searches for b', Z' and friends 

I will argue that new physics search strategies should be built from generalized effective Lagrangians, rather than scans of higher-scale parameters of a full theory or pure model-independent
searches.  I'll present recent CDF results on a search for a 4th generation down-type quark (b'), including the strongest direct limits on this particle. I will also show work on search for a Z',
using a newly developed statistical approach. Finally, I'll present prospects for supersymmetric searches using generalized effective Lagrangians."

February 8, 2010
  David Moore, Caltech, New Results from the Final Runs of the CDMS-II Experiment

The Cryogenic Dark Matter Search (CDMS) has pioneered the use of ionization and athermal phonon signals to discriminate between signal (nuclear recoil) and background (electron recoil) events in germanium
crystals cooled to ~50 mK. Using the phonon pulse shape, ionization yield, and position information for interactions in the detectors, we can maximize our discovery potential by adjusting the expected leakage
from backgrounds into the signal region to be less than one event. The final runs of the CDMS-II experiment in the Soudan Underground Laboratory located in northern Minnesota include an additional ~600 kg-
days of raw exposure of our Ge detectors. I will present results from the recently unblinded analysis of this data, report on the significance of these new results, and discuss the implications for
future dark matter direct detection experiments.

April 19, 2010
  Marcelo Gleiser, Dartmouth, Ocsillons in Scalar and Gauge Theories: Theory and Applications in Particle Physics and Cosmology

Oscillons are localized, time-dependent field configurations which are remarkably long-lived, possibly even perturbatively stable in a few cases. In this talk, we will examine several models including scalar and
gauge fieldswhere they have been found, discuss their amazing properties, and
develop a theoretical method to explain their behavior. We will also explain how oscillons can be of relevance in models with extra
spatial dimensions
and in cosmological applications.