Unravelling Strings at the LHC

We construct LHC signature footprints for four semi-realistic string/$M$ theory vacua with an MSSM visible sector. We find that they all give rise to limited regions in LHC signature space, and are qualitatively different from each other for understandable reasons. We also propose a technique in which correlations of LHC signatures can be effectively used to distinguish among these string theory vacua. We expect the technique to be useful for more general string vacua. We argue that further systematic analysis with this approach will allow LHC data to disfavor or exclude major ``corners'' of string/$M$ theory and favor others. The technique can be used with limited integrated luminosity and improved.Comment: 34 pages, 16 figure

Learning about Meson States from Their Production Properties

An attempt is made to increase our awareness of the value of including information on production mechanisms in our study of hadron resonances and meson‐meson scattering.Peer Reviewedhttp://deepblue.lib.umich.edu/bitstream/2027.42/87706/2/247_1.pd

Testing technicolor theories

We provide improved estimates of the masses, decay modes and widths, and production cross sections of the physical particles expected in theories with dynamical symmetry breaking. The most important results are charged pseudo‐Nambu‐Goldstone‐bosons aT+ with m±?8 GeV (and thus detectable at PETRA/PEP), two neutral pseudoscalars with m0≲2.5 GeV, and the colored technieta (m = 240 GeV) with observable production cross sections at the Tevatron Collider and at Isabelle. The calculations were done with S. Dimopoulos and S. Raby.Peer Reviewedhttp://deepblue.lib.umich.edu/bitstream/2027.42/87691/2/493_1.pd

How can we find out what causes CP violation?

What causes CP violation is studied. CP violation in kaons decay is presented. (AIP)Peer Reviewedhttp://deepblue.lib.umich.edu/bitstream/2027.42/87729/2/96_1.pd