Degree Department

Pair Production Constraints on Superluminal Neutrinos Revisited (open access)

Pair Production Constraints on Superluminal Neutrinos Revisited

We revisit the pair creation constraint on superluminal neutrinos considered by Cohen and Glashow in order to clarify which types of superluminal models are constrained. We show that a model in which the superluminal neutrino is effectively light-like can evade the Cohen-Glashow constraint. In summary, any model for which the CG pair production process operates is excluded because such timelike neutrinos would not be detected by OPERA or other experiments. However, a superluminal neutrino which is effectively lightlike with fixed p{sup 2} can evade the Cohen-Glashow constraint because of energy-momentum conservation. The coincidence involved in explaining the SN1987A constraint certainly makes such a picture improbable - but it is still intrinsically possible. The lightlike model is appealing in that it does not violate Lorentz symmetry in particle interactions, although one would expect Hughes-Drever tests to turn up a violation eventually. Other evasions of the CG constraints are also possible; perhaps, e.g., the neutrino takes a 'short cut' through extra dimensions or suffers anomalous acceleration in matter. Irrespective of the OPERA result, Lorentz-violating interactions remain possible, and ongoing experimental investigation of such possibilities should continue.
Date: February 16, 2012
Creator: Brodsky, Stanley J. & Gardner, Susan
Object Type: Article
System: The UNT Digital Library
The Impact of Intrinsic Heavy Quark Distributions in the Proton on New Physics Searches at the High Intensity Frontier (open access)

The Impact of Intrinsic Heavy Quark Distributions in the Proton on New Physics Searches at the High Intensity Frontier

The possibility of an intense proton facility, at 'Project X' or elsewhere, will provide many new opportunities for searches for physics beyond the Standard Model. A Project X can serve a yet broader role in the search for new physics, and in this note we highlight the manner in which thus-enabled studies of the flavor structure of the proton, particularly of its intrinsic heavy quark content, facilitate other direct and indirect searches for new physics. Intrinsic heavy quarks in both light and heavy hadrons play a key role in searches for physics BSM with hadrons - and their study at the Intensity Frontier may prove crucial to establishing its existence.
Date: February 16, 2012
Creator: Brodsky, Stanley & Gardner, Susan
Object Type: Article
System: The UNT Digital Library
Rapid, Low-Cost Noble Gas Tracer Monitoring to Determine Travel Times at Recharge Operations (open access)

Rapid, Low-Cost Noble Gas Tracer Monitoring to Determine Travel Times at Recharge Operations

None
Date: February 28, 2012
Creator: Visser, A.; Singleton, M.; Hillegonds, D.; Velsko, C.; Moran, J. E. & Esser, B. K.
Object Type: Report
System: The UNT Digital Library
Electron Anomalous Magnetic Moment in Basis Light-Front Quantization Approach (open access)

Electron Anomalous Magnetic Moment in Basis Light-Front Quantization Approach

We apply the Basis Light-Front Quantization (BLFQ) approach to the Hamiltonian field theory of Quantum Electrodynamics (QED) in free space. We solve for the mass eigenstates corresponding to an electron interacting with a single photon in light-front gauge. Based on the resulting non-perturbative ground state light-front amplitude we evaluate the electron anomalous magnetic moment. The numerical results from extrapolating to the infinite basis limit reproduce the perturbative Schwinger result with relative deviation less than 1.2%. We report significant improvements over previous works including the development of analytic methods for evaluating the vertex matrix elements of QED.
Date: February 17, 2012
Creator: Zhao, Xingbo; Honkanen, Heli; Maris, Pieter; Vary, James P. & Brodsky, Stanley J.
Object Type: Article
System: The UNT Digital Library
National Register of Historic Places Eligibility Testing of Sites 41LT172 and 41LT354 in Luminant's Kosse Mine, Limestone, Texas (open access)

National Register of Historic Places Eligibility Testing of Sites 41LT172 and 41LT354 in Luminant's Kosse Mine, Limestone, Texas

Report on the findings of an archaeological investigation of two sites at Luminant's Kosse Mine in Limestone County, Texas to determine whether they were eligible to be included on the National Register of Historic Places.
Date: February 2012
Creator: Atkins North America, Inc.
Object Type: Report
System: The Portal to Texas History
SuperB Progress Report for Physics (open access)

SuperB Progress Report for Physics

SuperB is a high luminosity e{sup +}e{sup -} collider that will be able to indirectly probe new physics at energy scales far beyond the reach of any man made accelerator planned or in existence. Just as detailed understanding of the Standard Model of particle physics was developed from stringent constraints imposed by flavour changing processes between quarks, the detailed structure of any new physics is severely constrained by flavour processes. In order to elucidate this structure it is necessary to perform a number of complementary studies of a set of golden channels. With these measurements in hand, the pattern of deviations from the Standard Model behavior can be used as a test of the structure of new physics. If new physics is found at the LHC, then the many golden measurements from SuperB will help decode the subtle nature of the new physics. However if no new particles are found at the LHC, SuperB will be able to search for new physics at energy scales up to 10-100 TeV. In either scenario, flavour physics measurements that can be made at SuperB play a pivotal role in understanding the nature of physics beyond the Standard Model. Examples for using the interplay …
Date: February 14, 2012
Creator: O'Leary, B.; Matias, J.; Ramon, M.; Pous, E.; De Fazio, F.; Palano, A. et al.
Object Type: Report
System: The UNT Digital Library
StarDate, Volume 40, Number 1, January/February 2012 (open access)

StarDate, Volume 40, Number 1, January/February 2012

Bimonthly publication of the McDonald Observatory discussing research, news, and other topics of interest related to astronomy and science. The publication offers key featured articles, miscellaneous astronomy information, a a current star chart, a calendar of astronomical events, and a Q&A titled Dear Merlin.
Date: February 2012
Creator: McDonald Observatory
Object Type: Journal/Magazine/Newsletter
System: The Portal to Texas History
Applying graph partitioning methods in measurement-based dynamic load balancing (open access)

Applying graph partitioning methods in measurement-based dynamic load balancing

None
Date: February 21, 2012
Creator: Bhatele, A; Fourestier, S; Menon, H; Kale, L V & Pellegrini, F
Object Type: Report
System: The UNT Digital Library
Sweetwater Reporter (Sweetwater, Tex.), Vol. 114, No. 033, Ed. 1 Friday, February 24, 2012 (open access)

Sweetwater Reporter (Sweetwater, Tex.), Vol. 114, No. 033, Ed. 1 Friday, February 24, 2012

Daily newspaper from Sweetwater, Texas that includes local, state, and national news along with advertising.
Date: February 24, 2012
Creator: unknown
Object Type: Newspaper
System: The Portal to Texas History
Sweetwater Reporter (Sweetwater, Tex.), Vol. 114, No. 030, Ed. 1 Tuesday, February 21, 2012 (open access)

Sweetwater Reporter (Sweetwater, Tex.), Vol. 114, No. 030, Ed. 1 Tuesday, February 21, 2012

Daily newspaper from Sweetwater, Texas that includes local, state, and national news along with advertising.
Date: February 21, 2012
Creator: unknown
Object Type: Newspaper
System: The Portal to Texas History
Texas Law Review, Volume 90, Number 3, February 2012 (open access)

Texas Law Review, Volume 90, Number 3, February 2012

Journal containing articles, notes, book reviews, and other analyses of law and legal cases.
Date: February 2012
Creator: Texas Law Review Association
Object Type: Journal/Magazine/Newsletter
System: The Portal to Texas History
The Optimist (Abilene, Tex.), Vol. 100, No. 39, Ed. 1 Friday, February 24, 2012 (open access)

The Optimist (Abilene, Tex.), Vol. 100, No. 39, Ed. 1 Friday, February 24, 2012

Bi-weekly student newspaper from Abilene Christian University in Abilene, Texas that includes local, state and campus news along with advertising.
Date: February 24, 2012
Creator: unknown
Object Type: Newspaper
System: The Portal to Texas History
The Baytown Sun (Baytown, Tex.), Vol. 92, No. 39, Ed. 1 Friday, February 24, 2012 (open access)

The Baytown Sun (Baytown, Tex.), Vol. 92, No. 39, Ed. 1 Friday, February 24, 2012

Daily newspaper from Baytown, Texas that includes local, state, and national news along with advertising.
Date: February 24, 2012
Creator: Yanelli, Adam
Object Type: Newspaper
System: The Portal to Texas History
The Baytown Sun (Baytown, Tex.), Vol. 92, No. 38, Ed. 1 Thursday, February 23, 2012 (open access)

The Baytown Sun (Baytown, Tex.), Vol. 92, No. 38, Ed. 1 Thursday, February 23, 2012

Daily newspaper from Baytown, Texas that includes local, state, and national news along with advertising.
Date: February 23, 2012
Creator: Yanelli, Adam
Object Type: Newspaper
System: The Portal to Texas History
Hilltop Views (Austin, Tex.), Vol. 31, No. 1, Ed. 1 Wednesday, February 1, 2012 (open access)

Hilltop Views (Austin, Tex.), Vol. 31, No. 1, Ed. 1 Wednesday, February 1, 2012

Weekly student newspaper from St. Edward's University in Austin, Texas that includes news and information of interest to the college community along with advertising.
Date: February 1, 2012
Creator: unknown
Object Type: Newspaper
System: The Portal to Texas History
Hudspeth County Herald and Dell Valley Review (Dell City, Tex.), Vol. 56, No. 15, Ed. 1 Friday, February 24, 2012 (open access)

Hudspeth County Herald and Dell Valley Review (Dell City, Tex.), Vol. 56, No. 15, Ed. 1 Friday, February 24, 2012

Weekly newspaper from Dell City, Texas that includes local, state, and national news along with advertising.
Date: February 24, 2012
Creator: Stuart, Andrew
Object Type: Newspaper
System: The Portal to Texas History
The Optimist (Abilene, Tex.), Vol. 100, No. 35, Ed. 1 Friday, February 10, 2012 (open access)

The Optimist (Abilene, Tex.), Vol. 100, No. 35, Ed. 1 Friday, February 10, 2012

Bi-weekly student newspaper from Abilene Christian University in Abilene, Texas that includes local, state and campus news along with advertising.
Date: February 10, 2012
Creator: unknown
Object Type: Newspaper
System: The Portal to Texas History
The Baytown Sun (Baytown, Tex.), Vol. 92, No. 34, Ed. 1 Friday, February 17, 2012 (open access)

The Baytown Sun (Baytown, Tex.), Vol. 92, No. 34, Ed. 1 Friday, February 17, 2012

Daily newspaper from Baytown, Texas that includes local, state, and national news along with advertising.
Date: February 17, 2012
Creator: Yanelli, Adam
Object Type: Newspaper
System: The Portal to Texas History
The Optimist (Abilene, Tex.), Vol. 100, No. 40, Ed. 1 Wednesday, February 29, 2012 (open access)

The Optimist (Abilene, Tex.), Vol. 100, No. 40, Ed. 1 Wednesday, February 29, 2012

Bi-weekly student newspaper from Abilene Christian University in Abilene, Texas that includes local, state and campus news along with advertising.
Date: February 29, 2012
Creator: unknown
Object Type: Newspaper
System: The Portal to Texas History
Hilltop Views (Austin, Tex.), Vol. 31, No. 2, Ed. 1 Wednesday, February 8, 2012 (open access)

Hilltop Views (Austin, Tex.), Vol. 31, No. 2, Ed. 1 Wednesday, February 8, 2012

Weekly student newspaper from St. Edward's University in Austin, Texas that includes news and information of interest to the college community along with advertising.
Date: February 8, 2012
Creator: unknown
Object Type: Newspaper
System: The Portal to Texas History
Sapulpa Daily Herald (Sapulpa, Okla.), Vol. 97, No. 100, Ed. 1 Thursday, February 2, 2012 (open access)

Sapulpa Daily Herald (Sapulpa, Okla.), Vol. 97, No. 100, Ed. 1 Thursday, February 2, 2012

Daily newspaper from Sapulpa, Oklahoma that includes local, state, and national news along with advertising.
Date: February 2, 2012
Creator: Gibbs, Angenene
Object Type: Newspaper
System: The Gateway to Oklahoma History

Mining Newspaper Archives

This presentation discusses mining online newspaper archives. The topics in this presentation include the types of information found in these newspapers, the technology and standards for digitizing newspapers and offering effective search and navigation, ways to search, view, and browse the newspapers and how to use the search results.
Date: February 2, 2012
Creator: Carlisle, Tara & Murray, Kathleen R.
Object Type: Presentation
System: The UNT Digital Library
The Oklahoma Daily (Norman, Okla.), Vol. 97, No. 92, Ed. 1 Thursday, February 2, 2012 (open access)

The Oklahoma Daily (Norman, Okla.), Vol. 97, No. 92, Ed. 1 Thursday, February 2, 2012

Student newspaper of the University of Oklahoma in Norman, Oklahoma that includes national, local, and campus news along with advertising.
Date: February 2, 2012
Creator: Lusk, Chris
Object Type: Newspaper
System: The Gateway to Oklahoma History
The Albany News (Albany, Tex.), Vol. 136, No. 38, Ed. 1 Thursday, February 9, 2012 (open access)

The Albany News (Albany, Tex.), Vol. 136, No. 38, Ed. 1 Thursday, February 9, 2012

Weekly newspaper from Albany, Texas that includes local, county, and state news along with extensive advertising.
Date: February 9, 2012
Creator: Lucas, Melinda L.
Object Type: Newspaper
System: The Portal to Texas History