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| Creator | Title | Description | Subject | Date | ||
|---|---|---|---|---|---|---|
| 1 |
 | DeTar, Carleton | B̄→D*ℓν̄ form factor at zero recoil from three-flavor lattice QCD: a model independent determination of [Vcb] | We present the first lattice QCD calculation of the form factor for B→ D* lv with three flavors of sea quarks. We use an improved staggered action for the light valence and sea quarks (the MILC configurations), and the Fermilab action for the heavy quarks. The form factor is computed at zero recoi... | Staggered quarks | 2009-01 |
| 2 |
 | DeTar, Carleton | B→πlν semileptonic form factor from three-flavor lattice QCD: a model-independent determination of [Vub] | We calculate the form factor f+(q2) for B-meson semileptonic decay in unquenched lattice QCD with 2 + 1 flavors of light sea quarks. We use Asqtad-improved staggered light quarks and a Fermilab bottom quark on gauge configurations generated by the MILC Collaboration. We simulate with several light... | Semileptonic decay | 2009-03 |
| 3 |
 | Gondolo, Paolo | Dark matter axions revisited | We study for what specific values of the theoretical parameters the axion can form the totality of cold dark matter. We examine the allowed axion parameter region in the light of recent data collected by the WMAP5 mission plus baryon acoustic oscillations and supernovae, and assume an inflationary... | WMAP5 mission; PQ symmetry; Anharmonicity; Misalignment angle | 2009-08 |
| 4 |
 | Gondolo, Paolo | Dark matter in the MSSM golden region | Dark matter is examined within the ‘‘golden region'' of the minimal supersymmetric standard model. This region satisfies experimental constraints, including a lower bound on the Higgs mass of 114 GeV, and minimizes fine-tuning of the Z boson mass. Here we impose additional constraints (particula... | MSSM golden region; Neutralinos; Higgs mass | 2009-02 |
| 5 |
 | DeTar, Carleton | Equation of state and QCD transition at finite temperature | We calculate the equation of state in 2 + 1 flavor QCD at finite temperature with physical strange quark mass and almost physical light quark masses using lattices with temporal extent Nr = 8. Calculations have been performed with two different improved staggered fermion actions, the asqtad and p4 a... | Deconfinement; Chiral symmetry; Staggered fermions; Phase transitions; Polyakov loop | 2009-07 |
| 6 |
 | Gondolo, Paolo | Solar neutrino limit on axions and keV-mass bosons | The all-flavor solar neutrino flux measured by the Sudbury Neutrino Observatory constrains nonstandard energy losses to less than about 10% of the Sun's photon luminosity, superseding a helioseismological argument and providing new limits on the interaction strength of low-mass particles. For the ... | Interaction strength; keV-mass | 2009-05 |
| 7 |
 | DeTar, Carleton | Visualization of semileptonic form factors from lattice QCD | Comparisons of lattice-QCD calculations of semileptonic form factors with experimental measurements often display two sets of points, one each for lattice QCD and experiment. Here we propose to display the output of a lattice-QCD analysis as a curve and error band. This is justified, because lattice... | Semileptonic decay | 2009-08 |
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