| | Title | Creator | Description | Subject | Date |
|---|
| 1 |  | Semileptonic D → π/K and B → π/D decays in 2+1 flavor lattice QCD | DeTar, Carleton | We present results for form factors of semileptonic decays of D and B mesons in 2+1 flavor lattice QCD using the MILC gauge configurations. With an improved staggered action for light quarks, we successfully reduce the systematic error from the chiral extrapolation. The results for D decays are in a... | Semileptonic decay | 2005-03 |
| 2 |  | Semileptonic decays of heavy mesons with the fat clover action | DeTar, Carleton | We are studying a variety of semileptonic decays of heavy-light mesons in an effort to improve the determination of the heavy-quark Standard-Model CKM matrix elements. Our fermion action is a novel, improved "fat" clover action that promises to reduce problems with exceptional configurations. Dynami... | Semileptonic decay; Decay constants; Staggered quarks; Fat-clover valence quarks | 2000-04 |
| 3 |  | Sepp1UF forms are N-terminal selenoprotein P truncations that have peroxidase activity when coupled with thioredoxin reductase-1 | Capecchi, Mario R. | Mouse selenoprotein P (Sepp1) consists of an N-terminal domain (residues 1-239) that contains 1 selenocysteine (U) as residue 40 in a proposed redox-active motif (-UYLC-) and a Cterminal domain (residues 240-361) that contains 9 selenocysteines. Sepp1 transports selenium from the liver to other tiss... | | 2014-01-01 |
| 4 |  | Quark loop effects in semileptonic form factors for heavy-light mesons | DeTar, Carleton | We present preliminary results of a determination of the semileptonic form factor for the decay of pseudoscalar heavy-light mesons to pseudoscalar light-light mesons in full QCD. In this preliminary study we focus on the effects of dynamical quark loops. Accordingly, we compare results of simulati... | Semileptonic decay; Form factors; Quark loops; Wilson quarks | 2004-03 |
| 5 |  | Quiver matrix mechanics for IIB string theory (I): wrapping membranes and emergent dimension | Wu, Yong-Shi | In this paper we present a discrete, non-perturbative formulation for type IIB string theory. Being a supersymmetric quiver matrix mechanics model in the framework of M(atrix) theory, it is a generalization of our previous proposal of compactification via orbifolding for deconstructed IIA strings. ... | | 2004-04 |
| 6 |  | Quiver matrix mechanics for IIB string theory (II): generic dual tori, fractional matrix membrane and SL(2, Z) duality | Wu, Yong-Shi | With the deconstruction technique, the geometric information of a torus can be encoded in a sequence of orbifolds. By studying the Matrix Theory on these orbifolds as quiver mechanics, we present a formulation that (de)constructs the torus of generic shape on which Matrix Theory is "compactified". T... | | 2005-02 |
| 7 |  | Quiver mechanics for deconstructed matrix string | Wu, Yong-Shi | In this paper we propose a quiver model of matrix quantum mechanics with 8 supercharges which, on a Higgs branch, deconstructs the worldsheet of Matrix String Theory. This discrete model evades the fermion doubling problem and, in the continuum limit, enhances the number of supersymmetries to sixte... | | 2003-12 |
| 8 |  | Heavy-light decay constants - MILC results with the Wilson action | DeTar, Carleton | We present the current status of our ongoing calculations of pseudoscalar meson decay constants for mesons that contain one light and one heavy quark (fB, fBs , fD, fDs ). We are currently generating new gauge configurations that include dynamical quarks and calculating the decay constants. In add... | Decay constants; Wilson action; Kogut-Susskind quarks; Staggered quarks; Chiral extrapolation | 1998-01 |
| 9 |  | Heavy-light decay constants using clover valence quarks and three flavors of dynamical improved staggered quarks | DeTar, Carleton | Starting in 2001, the MILC Collaboration began a large scale calculation of heavy-light meson decay constants using clover valence quarks on ensembles of three flavor configurations. For the coarse configurations, with a = 0.12 fm, eight combinations of dynamical light and strange quarks have been ... | Decay constants; Clover valence quarks; Staggered quarks | 2005-03 |
| 10 |  | Heavy-light decay constants with dynamical gauge configurations and Wilson or improved valence quark actions | DeTar, Carleton | We describe a calculation of heavy-light decay constants including virtual quark loop effects. We have generated dynamical gauge configurations at three _x000C_ values using two flavors of Kogut-Susskind quarks with a range of masses. These are analyzed with a Wilson valence quark action. Prelimin... | Decay constants; Kogut-Susskind quarks; Wilson quarks; Fat-clover valence quarks | 2000-04 |
| 11 |  | Heavy-light decay constants with three dynamical flavors | DeTar, Carleton | We present preliminary results for the heavy-light leptonic decay constants in the presence of three light dynamical flavors. We generate dynamical configurations with improved staggered and gauge actions and analyze them for heavy-light physics with tadpole improved clover valence quarks. When th... | Leptonic decay; Decay constants | 2002-03 |
| 12 |  | Heavy-light decay constants: conclusions from the Wilson action | DeTar, Carleton | We report on the results of a MILC collaboration calculation of fB, fBs , fD, fDs and their ratios. We discuss the most important errors in more detail than we have elsewhere. | Decay constants; Wilson action; Staggered quarks | 1999-03 |
| 13 |  | Heavy-light meson decay constants with N f = 3 | DeTar, Carleton | During the past year the MILC Collaboration has continued its study of heavy-light meson decay constants with three dynamical quarks. Calculations have been extended to a second lattice spacing of about 0.09 fm. At this lattice spacing, there are results in the quenched approximation and for thr... | Dynamical quarks | 2003-05 |
| 14 |  | Update on fB | DeTar, Carleton | We describe the current status of the MILC collaboration computation of fB, fBs , fD, fDs and their ratios. Progress over the past year includes: better statistics and plateaus at _x000C_β = 6.52 (quenched), β_x000C_ = 5.6 (NF = 2) and β_x000C_ = 5.445 (NF = 2), new runs with a wide range of dyn... | Decay constants; Wilson quarks | 1997-02 |
| 15 |  | Update on the hadron spectrum with two flavors of staggered quarks | DeTar, Carleton | We present an update on the MILC Collaboration's light hadron spectrum calculation with two flavors of dynamical, staggered quarks. Results are presented for gauge couplings 5.30, 5.415, 5.50 and 5.60, with a range of quark masses for each value of the coupling. We present extrapolations of mN/mp ... | Staggered quarks; Hadron spectrum | 1998-04 |
| 16 |  | Phase diagram of high temperature QCD with three flavors of improved staggered quarks | DeTar, Carleton | We report on progress in our study of high temperature QCD with three flavors of improved staggered quarks. Simulations are being carried out with three degenerate quarks with masses less than or equal to the strange quark mass, ms, and with degenerate up and down quarks with masses in the range 0... | Staggered quarks | 2004-03 |
| 17 |  | Photoexcitation dynamics in polythiophene/fullerene blends for photovoltaic applications | Vardeny, Zeev Valentine | We used the transient and steady state photomodulation spectroscopies for studying the photoexcitations dynamics in blends of regio-regular poly(3-hexylthiophene) (RR-P3HT) and fullerene in a broad spectral range from 0.15 to 2.25 eV. We found that both localized polarons and singlet excitons are in... | | 2012-01-01 |
| 18 |  | Ultra-sensitive electrical detection of spin Rabi oscillation at paramagnetic defects | Boehme, Christoph | A short review of the pulsed electrically detected magnetic resonance (pEDMR) experiment is presented. PEDMR allows the highly sensitive observation of coherent electron spin motion of charge carriers and defects in semiconductors by means of transient current measurements. The theoretical foundatio... | Rabi oscillations; Electron spin resonance; Paramagnetic defects | 2006-04 |
| 19 |  | Ultrasonic thermoacoustic energy converter | Symko, Orest George | Thermoacoustic prime movers have been developed for operation in the low ultrasonic frequency range by scaling down the device size. The developed engines operate at frequencies up to 23 kHz. They are self-sustained oscillators whose dimensions scale inversely with operating frequency. The smallest ... | | 2012-01-01 |
| 20 |  | Static hybrid quarkonium potential with improved staggered quarks | DeTar, Carleton | We are studying the effects of light dynamical quarks on the excitation energies of a flux tube between a static quark and antiquark. We report preliminary results of an analysis of the ground state potential and the ∑g′+ and Πu potentials. We have measured these potentials on closely matched... | Quarkonium; Staggered quarks; Flux tube | 2003-05 |
| 21 |  | String breaking in lattice QCD | DeTar, Carleton | The separation of a heavy quark and antiquark pair leads to the formation of a tube of flux, or string, which should break in the presence of light quark-antiquark pairs. This expected zero temperature phenomenon has proven elusive in simulations of lattice QCD. We present simulation results that ... | String breaking; Flux tube; Staggered quarks; Wilson loop; Polyakov loop | 1999-03 |
| 22 |  | SU(3) lattice gauge theory with adjoint action at nonzero temperature | DeTar, Carleton | We study the thermal phase diagram of pure SU(3) gauge theory with fundamental and adjoint couplings. We improve previous estimates of the position of the bulk transition line and determine the thermal deconfinement transition lines for Nt = 2,4,6, and 8. For Nt > 4 the deconfinement transition li... | Phase transitions; Deconfinement | 1995-04 |
| 23 |  | Effect of clouds on apertures of space-based air fluorescence detectors | Sokolsky, Pierre | Space-based ultra-high-energy cosmic ray detectors observe fluorescence light from extensive air showers produced by these particles in the troposphere. Clouds can scatter and absorb this light and produce systematic errors in energy determination and spectrum normalization. We study the possibilit... | Fluorescence; Cloud detection; Extensive air showers | 2004-01 |
| 24 |  | The effects of climate change on tropical birds | Sekercioglu, Cagan | Birds are among the most widely studied organisms on earth and represent an important indicator group for learning about the effects of climate change - particularly in regard to the effects of climate change on tropical ecosystems. In this review, we assess the potential impacts of climate change o... | | 2010-01-01 |
| 25 |  | Alkali metal cation interactions with 12-crown-4 in the gas phase: revisited | Armentrout, Peter B. | Quantitative interactions of alkali metal cations with the cyclic 12-crown-4 polyether ligand (12C4) are studied. Experimentally, Rb+(12C4) and Cs+(12C4) complexes are formed using electrospray ionization and their bond dissociation energies (BDEs) determined using threshold collision-induced dissoc... | | 2012-01-01 |
