scholarly journals Mass Determination of Black Holes in LMC X-1 and Nova Muscae 1991 from Their High-Energy Spectra

1999 ◽  
Vol 521 (2) ◽  
pp. L121-L124 ◽  
Author(s):  
C. R. Shrader ◽  
Lev Titarchuk
Keyword(s):  
Black Holes ◽  
High Energy ◽  
Energy Spectra ◽  
Mass Determination

scholarly journals PRECISION MASS DETERMINATION OF THE HIGGS BOSON AT PHOTON–PHOTON COLLIDERS

2000 ◽  
Vol 15 (16) ◽  
pp. 2605-2611 ◽  
Author(s):  
TOMOMI OHGAKI
Keyword(s):  
Higgs Boson ◽  
Standard Model ◽  
Higgs Mass ◽  
Statistical Error ◽  
High Energy ◽  
Boson Mass ◽  
Total Width ◽  
Mass Determination ◽  
The Standard Model

We demonstrate a measurement of the Higgs boson mass by the method of energy scanning at photon–photon colliders, using the high energy edge of the photon spectrum. With an integrated luminosity of 50 fb-1 it is possible to measure the standard model Higgs mass to within 110 MeV in photon–photon collisions for mh=100 GeV. As for the total width of the Higgs boson, the statistical error ΔΓh/Γh SM=0.06 is expected for mh=100 GeV, if both Γ(h→γγ) and [Formula: see text] are fixed at the predicted standard model value.

Mass Determination Algorithms Using High Energy Digital Radiography

2015 ◽  
Vol 1085 ◽  
pp. 455-459 ◽  
Author(s):  
Sergei P. Osipov ◽  
Vasilii A. Klimenov ◽  
Oleg S. Osipov ◽  
Vil'dan D. Samigullin ◽  
Aleksandr M. Shtein
Keyword(s):  
Test Object ◽  
Effective Atomic Number ◽  
High Energy ◽  
Mass Determination ◽  
Radiographic Images ◽  
X Ray ◽  
Large Size ◽  
X Ray Imaging ◽  
Cargo Inspection

The paper presents foundations of the algorithm of processing primary radiographic images of large-size cargoes that allows determination of their masses. Two possible approaches to form definite algorithm of processing radiographic information were analyzed. The choice of the approaches depends on the completeness of information about the test object. The first approach to design mass determination algorithm is connected with inspecting industrial products. Industrial inspecting products are characterized by a completeness of information about the material, its structure, the geometry. The information augmented by selecting maximum X-ray energy and calibrating by test object allows determination the mass of inspecting object by the only radiographic image with high precision. The second approach is caused by indeterminacy and incomplete information about inspecting object. This case is typical for problems of cargo inspection. Corresponding algorithm modification is based on using dual-energy X-ray imaging that allows determination of the effective atomic number of test object and provision of the required precision of mass estimation.

scholarly journals The effect of nuclear gas distribution on the mass determination of supermassive black holes

2017 ◽  
Vol 2 (1) ◽  
pp. 63-68 ◽  
Author(s):  
J. E. Mejía-Restrepo ◽  
P. Lira ◽  
H. Netzer ◽  
B. Trakhtenbrot ◽  
D. M. Capellupo
Keyword(s):  
Black Holes ◽  
Supermassive Black Holes ◽  
Mass Determination ◽  
Gas Distribution

Kinematic Approximations in TED and RHEED Analysis of Reconstructed Surfaces

1990 ◽  
Vol 48 (2) ◽  
pp. 396-397
Author(s):  
L. -M. Peng ◽  
M. J. Whelan
Keyword(s):  
Electron Diffraction ◽  
Kinematic Analysis ◽  
Incident Beam ◽  
High Energy ◽  
Energy Electron ◽  
Great Success ◽  
High Energy Electron ◽  
Kinematic Approximation ◽  
Reconstructed Surfaces

In recent years there has been a trend in the structure determination of reconstructed surfaces to use high energy electron diffraction techniques, and to employ a kinematic approximation in analyzing the intensities of surface superlattice reflections. Experimentally this is motivated by the great success of the determination of the dimer adatom stacking fault (DAS) structure of the Si(111) 7 × 7 reconstructed surface.While in the case of transmission electron diffraction (TED) the validity of the kinematic approximation has been examined by using multislice calculations for Si and certain incident beam directions, far less has been done in the reflection high energy electron diffraction (RHEED) case. In this paper we aim to provide a thorough Bloch wave analysis of the various diffraction processes involved, and to set criteria on the validity for the kinematic analysis of the intensities of the surface superlattice reflections.The validity of the kinematic analysis, being common to both the TED and RHEED case, relies primarily on two underlying observations, namely (l)the surface superlattice scattering in the selvedge is kinematically dominating, and (2)the superlattice diffracted beams are uncoupled from the fundamental diffracted beams within the bulk.

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