764 citations
Counting papers with at most 25 authors, so collaboration author lists do not stand in for the people here.
- University College DublinIE182 papers
- Center for Astrophysics Harvard & SmithsonianUS167 papers
- Purdue University West LafayetteUS154 papers
- McGill UniversityCA153 papers
- University of California, Santa CruzUS151 papers
- Washington University in St. LouisUS150 papers
- Iowa State UniversityUS149 papers
- University of California, Los AngelesUS149 papers
- University of UtahUS149 papers
- Columbia UniversityUS138 papers
- Munster Technological UniversityIE138 papers
- University of ChicagoUS138 papers
14 papers · 1 filter
A Photometric Method for estimating CNO Abundances in Globular Clusters
David Peat, Raymond Butler
Stromgren indices v and b are combined with broad-band index I, and a new index p, the short wavelength half of the v band, to estimate CN 4215A molecular absorption in a sample of…
A new survey of variability in the core of M15 with TRIFFID-2
Seathrun O'Tuairisg, Raymond Butler, Andy Shearer +2
A two-week campaign of high-resolution imaging of the centre of M15 using the tip/tilt correcting TRIFFID-2 camera, followed by analysis with ISIS (image matching & subtraction sof…
Evaluation of the Performance of the Markov Blanket Bayesian Classifier Algorithm
Michael G. Madden
The Markov Blanket Bayesian Classifier is a recently-proposed algorithm for construction of probabilistic classifiers. This paper presents an empirical comparison of the MBBC algor…
PSR B1951+32 and PSR J0537-6910 - where are the optical counterparts?
R. F. Butler, A. Golden, A. Shearer +1
There remain several definitive gamma-ray pulsars that are as yet undetected in the optical regime. A classic case is the pulsar PSR B1951+32, associated with the complex CTB 80 SN…
Pade/renormalization-group improvement of inclusive semileptonic B decay rates
M. R. Ahmady, F. A. Chishtie, V. Elias +4
Renormalization Group (RG) and optimized Pade-approximant methods are used to estimate the three-loop perturbative contributions to the inclusive semileptonic b \to u and b \to c d…
Vanishing of the Bare Coupling in Four Dimensions
V. Elias, D. G. C. McKeon
We examine two restructurings of the series relationship between the bare and renormalized coupling constant in dimensional regularization. In one of these restructurings, we are a…
Renormalization-Mass Scale Dependence in QCD Contributions to Semileptonic Decay
M. R. Ahmady, F. A. Chishtie, V. Elias +4
QCD contributions to the decay rate, which are known to two-loop order in the scheme, exhibit sufficient dependence on the renormalization ma…
Optimal Renormalization-Group Improvement of the Perturbative Series for the e^+ e^- -Annihilation Cross-Section
M. R. Ahmady, F. A. Chishtie, V. Elias +5
Using renormalization-group methods, we derive differential equations for the all-orders summation of logarithmic corrections to the QCD series for R(s) = sigma(e^+ e^- --> hadrons…
Detection of new Optical Counterpart candidates to PSR B1951+32 with HST/WFPC2
R. F. Butler, A. Golden, A. Shearer
There remain several definitive gamma-ray pulsars that are as yet undetected in the optical regime. A classic case is the pulsar PSR B1951+32, associated with the complex CTB 80 SN…
Discovery of Spectral Variability of Markarian 421 at TeV Energies
F. Krennrich, I. H. Bond, S. M. Bradbury +38
The detection of spectral variability of the gamma-ray blazar Mrk 421 at TeV energies is reported. Observations with the Whipple Observatory 10m gamma-ray telescope taken in 2000/2…
Torus Chiral n-Point Functions for Free Boson and Lattice Vertex Operator Algebras
Geoffrey Mason, Michael P. Tuite
We obtain explicit expressions for all genus one chiral n-point functions for free bosonic and lattice vertex operator algebras. We also consider the elliptic properties of these f…
Closed-Form Summation of RG-Accessible Logarithmic Contributions to Semileptonic B-Decays and Other Perturbative Processes
M. R. Ahmady, F. A. Chishtie, V. Elias +5
For any perturbative series that is known to -subleading orders of perturbation theory, we utilise the process-appropriate renormalization-group (RG) equation in order to obtain…
Detection of the BL Lac Object H1426+428 at TeV Gamma Ray Energies
D. Horan
A very high energy (VHE) gamma-ray signal has been detected at the 5.4 sigma level from H1426+428, an x-ray selected BL Lacertae object at a redshift of 0.129. The object was monit…
Constraints on Higher-Order Perturbative Corrections in Semileptonic Decays from Residual Renormalization-Scale Dependence
M. R. Ahmady, F. A. Chishtie, V. Elias +4
The constraint of a progressive decrease in residual renormalization scale dependence with increasing loop order is developed as a method for obtaining bounds on unknown higher-ord…