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Microscopic Primordial Black Holes and Extra Dimensions

Description: We examine the production and evolution of microscopic black holes in the early universe in the large extra dimensions scenario. We demonstrate that, unlike in the standard four-dimensional cosmology, in large extra dimensions absorption of matter from the primordial plasma by the black holes is significant and can lead to rapid growth of the black hole mass density. This effect can be used to constrain the conditions present in the very early universe. We demonstrate that this constraint is ap… more
Date: November 15, 2006
Creator: Conley, John A. & Wizansky, Tommer
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Partner: UNT Libraries Government Documents Department
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Vector Unparticle Contributions to Lepton g-2

Description: The generic unparticle propagator may be modified in two ways. Breaking the conformal symmetry effectively adds a mass term to the propagator, while considering vacuum polarization corrections adds a width-like term. Both of these modifications result naturally from the coupling of the unparticle to standard model (SM) fields. We explore how these modifications to the propagator affect the calculation of the lepton anomalous magnetic moment using an integral approximation of the propagator that… more
Date: February 2, 2009
Creator: Conley, John A. & Gainer, James S.
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Partner: UNT Libraries Government Documents Department
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Effects of the Noncommutative Standard Model in WW Scattering

Description: We examine W pair production in the Noncommutative Standard Model constructed with the Seiberg-Witten map. Consideration of partial wave unitarity in the reactions WW {yields} WW and e{sup +}e{sup -} {yields} WW shows that the latter process is more sensitive and that tree-level unitarity is violated when scattering energies are of order a TeV and the noncommutative scale is below about a TeV. We find that WW production at the LHC is not sensitive to scales above the unitarity bounds. WW produc… more
Date: December 2, 2008
Creator: Conley, John A. & Hewett, JoAnne L.
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Partner: UNT Libraries Government Documents Department
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Determination of Littlest Higgs Model Parameters at the ILC

Description: We examine the effects of the extended gauge sector of the Littlest Higgs model in high energy e{sup +}e{sup -} collisions. We find that the search reach in e{sup +}e{sup -} {yields} f{bar f} at a {radical}s = 500 GeV International Linear Collider covers essentially the entire parameter region where the Littlest Higgs model is relevant to the gauge hierarchy problem. In addition, we show that this channel provides an accurate determination of the fundamental model parameters, to the precision o… more
Date: July 27, 2005
Creator: Conley, John A.; Hewett, JoAnne & Le, My Phuong
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Partner: UNT Libraries Government Documents Department
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Super symmetry Without Prejudice at the LHC

Description: The discovery and exploration of Supersymmetry in a model-independent fashion will be a daunting task due to the large number of soft-breaking parameters in the MSSM. In this paper, we explore the capability of the ATLAS detector at the LHC ({radical}s = 14 TeV, 1 fb{sup -1}) to find SUSY within the 19-dimensional pMSSM subspace of the MSSM using their standard transverse missing energy and long-lived particle searches that were essentially designed for mSUGRA. To this end, we employ a set of {… more
Date: August 19, 2011
Creator: Conley, John A.; Gainer, James S.; Hewett, JoAnne L.; Le, My Phuong & Rizzo, Thomas G.
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Partner: UNT Libraries Government Documents Department
open access

Super symmetry Without Prejudice at the 7 TeV LHC

Description: We investigate the model independent nature of the Supersymmetry search strategies at the 7 TeV LHC. To this end, we study the missing-transverse-energy-based searches developed by the ATLAS Collaboration that were essentially designed for mSUGRA. We simulate the signals for {approx} 71k models in the 19-dimensional parameter space of the pMSSM. These models have been found to satisfy existing experimental and theoretical constraints and provide insight into general features of the MSSM without… more
Date: August 12, 2011
Creator: Conley, John A.; Gainer, James S.; Hewett, JoAnne L.; Le, My Phuong & Rizzo, Thomas G.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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