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Counting papers with at most 25 authors, so collaboration author lists do not stand in for the people here.
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90 papers · 1 filter
Source breakup dynamics in Au+Au Collisions at sqrt(s_NN)=200 GeV via three-dimensional two-pion source imaging
PHENIX Collaboration, S. Afanasiev
A three-dimensional (3D) correlation function obtained from mid-rapidity, low pT pion pairs in central Au+Au collisions at sqrt(s_NN)=200 GeV is studied. The extracted model-indepe…
Calculation of UNil for the cyclic group of order two
Qayum Khan
Cappell's unitary nilpotent groups UNil(R;R,R) are calculated for the integral group ring R=Z[C_2] of the cyclic group C_2 of order two. Specifically, they are determined as module…
The Subaru/XMM-Newton Deep Survey (SXDS) - V. Optically Faint Variable Object Survey
Tomoki Morokuma, Mamoru Doi, Naoki Yasuda +19
We present our survey for optically faint variable objects using multi-epoch (8-10 epochs over 2-4 years) -band imaging data obtained with Subaru Suprime-Cam over 0.918 deg…
Constraining the Age-Activity Relation for Cool Stars: The SDSS DR5 Low-Mass Star Spectroscopic Sample
Andrew A. West, Suzanne L. Hawley, John J. Bochanski +5
We present a spectroscopic analysis of over 38,000 low-mass stars from the Sloan Digital Sky Survey (SDSS) Data Release 5 (DR5). Analysis of this unprecedentedly large sample confi…
A Study of the Semileptonic Charm Decays D^0 --> pi^- e^+ nu_e, D^+ --> pi^0 e^+ nu_e, D^0 --> K^- e^+ nu_e, and D^+ --> barK^0 e^+ nu_e
CLEO Collaboration, S. Dobbs
Using a sample of 1.8 million DDbar meson pairs collected at the psi(3770) with the CLEO-c detector, we study the semileptonic decays D^0 -> pi^- e^+ nu_e, D^+ -> pi^0 e^+ ν_e, D^0…
A Study of the Decays D^0 --> pi^- e^+ nu_e, D^0 --> K^- e^+ nu_e, D^+ --> pi^0 e^+ nu_e, and D^+ --> barK^0 e^+ nu_e
D. Cronin-Hennessy, CLEO Collaboration
Using 1.8 million DDbar pairs and a neutrino reconstruction technique, we have studied the decays D^0 -> K^- e^+ nu_e, D^0 -> pi^- e^+ nu_e, D^+ -> Kbar^0 e^+ nu_e, and D^+ -> pi^0…
Thawing quintessence with a nearly flat potential
Robert J. Scherrer, A. A. Sen
The thawing quintessence model with a nearly flat potential provides a natural mechanism to produce an equation of state parameter, w, close to -1 today. We examine the behavior of…
On fibering and splitting of 5-manifolds over the circle
Qayum Khan
Our main result is a generalization of Cappell's 5-dimensional splitting theorem. As an application, we analyze, up to internal s-cobordism, the smoothable splitting and fibering p…
Cold Nuclear Matter Effects on J/Psi as Constrained by Deuteron-Gold Measurements at sqrt(s_NN) = 200 GeV
PHENIX Collaboration, A. Adare
We present a new analysis of J/psi production yields in deuteron-gold collisions at sqrt(s_NN) = 200 GeV using data taken by the PHENIX experiment in 2003 and previously published…
The Late Time Behavior of False Vacuum Decay: Possible Implications for Cosmology and Metastable Inflating States
Lawrence M. Krauss, James Dent
We describe here how the late time behavior of the decaying states, which is predicted to deviate from an exponential form, while normally of insignificant consequence, may have im…
Metric sparsification and operator norm localization
Xiaoman Chen, Romain Tessera, Xianjin Wang +1
We study an operator norm localization property and its applications to the coarse Novikov conjecture in operator K-theory. A metric space X is said to have operator norm localizat…
The Monitor project: tracking the evolution of low mass and pre-main sequence stars
Suzanne Aigrain, Jonathan Irwin, Leslie Hebb +4
The Monitor project is a large-scale program of photometric and spectroscopic monitoring of young open clusters using telescopes at ESO and other observatories. Its primary goal is…
Detection of strong activity in the eclipsing binary brown dwarf 2MASSJ05352184-0546085 - A possible explanation for the temperature reversal
A. Reiners, A. Seifahrt, K. G. Stassun +2
We show high resolution spectra of the eclipsing brown dwarf binary 2MASSJ05352184-0546085 taken at the two opposite radial velocity maxima. Comparisons of the TiO bands to model a…
Flavor Ratios of Astrophysical Neutrinos: Implications for Precision Measurements
Sandip Pakvasa, Werner Rodejohann, Thomas J. Weiler
We discuss flavor-mixing probabilities and flavor ratios of high energy astrophysical neutrinos. In the first part of this paper, we expand the neutrino flavor-fluxes in terms of t…
Upper and Lower Bounds on Gravitational Entropy
Paul H. Frampton, Thomas W. Kephart
The entropy in the interior of the Universe has many contributions including well understood ones from radiation and relic neutrinos. The gravitational entropy is larger and more s…
TriMinimal Parametrization of the Neutrino Mixing Matrix
Sandip Pakvasa, Werner Rodejohann, Thomas J. Weiler
Current experimental data on neutrino mixing are very well described by TriBiMaximal mixing. Accordingly, any phenomenological parametrization of the MNSP matrix must build upon Tr…
On detecting CP violation in a single neutrino oscillation channel at very long baselines
D. C. Latimer, J. Escamilla, D. J. Ernst
We propose a way of detecting CP violation in a single neutrino oscillation channel at very long baselines (on the order of several thousands of kilometers), given precise knowledg…
Intersubband decay of 1-D exciton resonances in carbon nanotubes
Tobias Hertel, Vasili Perebeinos, Jared Crochet +3
We have studied intersubband decay of E22 excitons in semiconducting carbon nanotubes experimentally and theoretically. Photoluminescence excitation line widths of semiconducting n…
A New Determination of the High Redshift Type Ia Supernova Rates with the Hubble Space Telescope Advanced Camera for Surveys
N. Kuznetsova, K. Barbary, B. Connolly +27
We present a new measurement of the volumetric rate of Type Ia supernova up to a redshift of 1.7, using the Hubble Space Telescope (HST) GOODS data combined with an additional HST…
Dirac Fields in Loop Quantum Gravity and Big Bang Nucleosynthesis
Martin Bojowald, Rupam Das, Robert J. Scherrer
Big Bang nucleosynthesis requires a fine balance between equations of state for photons and relativistic fermions. Several corrections to equation of state parameters arise from cl…
Canonical Gravity with Fermions
Martin Bojowald, Rupam Das
Canonical gravity in real Ashtekar-Barbero variables is generalized to allow for fermionic matter. The resulting torsion changes several expressions in Holst's original vacuum anal…
Yang-Mills theory over surfaces and the Atiyah-Segal theorem
Daniel A. Ramras
In this paper we explain how Morse theory for the Yang-Mills functional can be used to prove an analogue, for surface groups, of the Atiyah-Segal theorem. Classically, the Atiyah-S…
The B and Be Star Population of NGC 3766
M. Virginia McSwain, Wenjin Huang, Douglas R. Gies +2
We present multiple epochs of H-alpha spectroscopy for 47 members of the open cluster NGC 3766 to investigate the long term variability of its Be stars. Sixteen of the stars in thi…
Ni+Ni fusion reaction calculated with the density-constrained time-dependent Hartree-Fock formalism
A. S. Umar, V. E. Oberacker
We study fusion reactions of the Ni+Ni system using the density-constrained time-dependent Hartree-Fock (TDHF) formalism. In this formalism the fusion barriers are di…