Now showing items 134-153 of 813

• #### D-particles on orientifolds and rational invariants ﻿

(Springer, 2017-07-11)
We revisit the DO bound state problems, of the M/IIA duality, with the Orientifolds. The cases of 04 and 08 have been studied recently, from the perspective of five-dimensional theories, while the case of O0 has been much ...
• #### Dalitz plot analysis of the D+ -> K-pi(+)pi(+) decay in the FOCUS experiment ﻿

(2007-09-13)
Using data collected by the high energy photoproduction experiment FOCUS at Fermilab we performed a Dalitz plot analysis of the Cabibbo favored decay D+ ! K−π+π+. This study uses 53653 Dalitz-plot events with a signal ...
• #### Dark energy and string theory ﻿

(2019-11-10)
A radiatively stable de Sitter spacetime is constructed by considering an intrinsically non-commutative and generalized-geometric formulation of string theory, which is related to a family of F-theory models endowed with ...
• #### Dark matter, infinite statistics, and quantum gravity ﻿

(American Physical Society, 2012-05-21)
We elaborate on our proposal regarding a connection between global physics and local galactic dynamics via quantum gravity. This proposal calls for the concept of MONDian dark matter which behaves like cold dark matter at ...
• #### Dark matter-neutrino interconversion at COHERENT, direct detection, and the early Universe ﻿

(2020-07-14)
We study a dark matter (DM) model in which the dominant coupling to the standard model occurs through a neutrino-DM-scalar coupling. The new singlet scalar will generically have couplings to nuclei/electrons arising from ...
• #### The DarkSide Multiton Detector for the Direct Dark Matter Search ﻿

(Hindawi, 2015-01-20)
Although the existence of dark matter is supported by many evidences, based on astrophysical measurements, its nature is still completely unknown. One major candidate is represented by weakly interacting massive particles ...
• #### A deep X-ray view of the bare AGN Ark 120: V. Spin determination from disc-Comptonisation efficiency method ﻿

(EDP Sciences, 2019-02-25)
Context. The spin of supermassive black holes (SMBH) in active galactic nuclei (AGN) can be determined from spectral signature(s) of relativistic reflection such as the X-ray iron Kα line profile, but this can be rather ...
• #### Defect-induced condensation and central peak at structural transitions ﻿

(1991-05-01)
• #### Defect-induced condensation and the central peak at elastic phase transitions ﻿

(1996-09-01)
Static and dynamical properties of elastic phase transitions under the influence of short–range defects, which locally increase the transition temperature, are investigated. Our approach is based on a Ginzburg–Landau theory ...

(2010-09)
• #### Delta isobar masses, large N-c relations, and the quark model ﻿

(American Physical Society, 1999-01-01)
Motivated by recent remarks on the Delta(+) mass and comparisons between the quark model and relations based on large-iri, with perturbative flavor breaking, two sets of Delta masses consistent with these constraints are ...
• #### Demonstration Of A Cylindrically Symmetric Second-Order Nonlinear Fiber with Self-Assembled Organic Surface Layers ﻿

(Optical Society of America, 2011-05-01)
We report the fabrication and characterization of a cylindrically symmetric fiber structure that possesses significant and thermodynamically stable second-order nonlinearity. Such fiber structure is produced through nanoscale ...
• #### Design and construction of the MicroBooNE detector ﻿

(Iop Publishing Ltd, 2017-02-01)
This paper describes the design and construction of the MicroBooNE liquid argon time projection chamber and associated systems. MicroBooNE is the first phase of the Short Baseline Neutrino program, located at Fermilab, and ...
• #### Detection in Hα of a Supershell Associated with W4 ﻿

(IOP PUBLISHING LTD, 1997-01)
From H I observations, Normandeau, Taylor, & Dewdney have identified a possible Galactic chimney emanating from W4. We observed a 10 degrees diameter field centered on this region in the Her line using a CCD camera sensitive ...
• #### Determination of antineutrino spectra from nuclear reactors ﻿

(American Physical Society, 2011-08-29)
In this paper we study the effect of well-known higher-order corrections to the allowed beta-decay spectrum on the determination of antineutrino spectra resulting from the decays of fission fragments. In particular, we try ...
• #### Determination of the Axial-Vector Weak Coupling Constant with Ultracold Neutrons ﻿

(American Physical Society, 2010-10-29)
A precise measurement of the neutron decay beta asymmetry A(0) has been carried out using polarized ultracold neutrons from the pulsed spallation ultracold neutron source at the Los Alamos Neutron Science Center. Combining ...
• #### Diagnostics of AGN-driven molecular outflows in ULIRGs from Herschel-PACS observations of OH at 119 μm ﻿

(IOP Publishing Ltd., 2013-10)
We report on our observations of the 79 and 119 mu m doublet transitions of OH for 24 local (z < 0.262) ULIRGs observed with Herschel-PACS as part of the Herschel ULIRG Survey (HERUS). Some OH 119 mu m profiles display a ...
• #### Dielectric function of polyacetylene ﻿

(American Physical Society, 1984-06)
The optical dielectric function for polyacetylene has been calculated in the random-phase approximation. Local-field corrections are included. The optical-absorption coefficient obtained is in good agreement with experimental ...
• #### The difficulties involved in calculating $δρ$ ﻿

We discuss the difficulties that arise when one tries to calculate $\delta\rho$ using dispersion relations.
• #### Diffusion of muonic atoms ﻿

(American Physical Society, 1988-10)
Transport of muonic hydrogen and deuterium atoms in gaseous hydrogen and deuterium is studied in the diffusion approximation and by means of the multiple-collision expansion. The diffusion coefficient is derived. Numerical ...