Showing 2007Show all

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astro-ph2007★ 39 cited

The chemical compositions of 10 new sub-DLAs and strong Lyman-limit systems at z < 1.5

Joseph D. Meiring, Varsha P. Kulkarni, James T. Lauroesch +4

We present chemical abundance measurements from medium resolution observations of 8 sub-damped Lyman-alpha absorber and 2 strong Lyman-limit systems at z < 1.5 observed with the MI…

math.GT2007

Dehn surgeries that yield fibred --manifolds

Yi Ni

We study Dehn surgeries on null-homotopic knots that yield fibred --manifolds when an additional (but natural) homological restriction is imposed. The major tool used is Gabai's…

nucl-ex2007★ 44 cited

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…

astro-ph2007★ 120 cited

Modeling The Structure And Dynamics of Dwarf Spheroidal Galaxies with Dark Matter And Tides

Ricardo R. Munoz, Steven R. Majewski, Kathryn V. Johnston

We report the results of N-body simulations of disrupting satellites aimed at exploring whether the observed features of dSphs can be accounted for with simple, mass-follows-light…

math.PR2007★ 160 cited

Martingale proofs of many-server heavy-traffic limits for Markovian queues

Guodong Pang, Rishi Talreja, Ward Whitt

This is an expository review paper illustrating the ``martingale method'' for proving many-server heavy-traffic stochastic-process limits for queueing models, supporting diffusion-…

math.PR2007★ 105 cited

Proofs of the martingale FCLT

Ward Whitt

This is an expository review paper elaborating on the proof of the martingale functional central limit theorem (FCLT). This paper also reviews tightness and stochastic boundedness,…

cond-mat.mes-hall2007★ 179 cited

Observation of Anomalous Phonon Softening in Bilayer Graphene

Jun Yan, Erik A. Henriksen, Philip Kim +1

The interaction of electron-hole pairs with lattice vibrations exhibits a wealth of intriguing physical phenomena. The Kohn anomaly is a renowned example where electron-phonon coup…

astro-ph2007★ 381 cited

A Search for Extended Ultraviolet Disk (XUV-disk) Galaxies in the Local Universe

David A. Thilker, Luciana Bianchi, Gerhardt Meurer +26

We have initiated a search for extended ultraviolet disk (XUV-disk) galaxies in the local universe. Herein, we compare GALEX UV and visible--NIR images of 189 nearby (D40 Mpc) S…

astro-ph2007★ 31 cited

Luminosity Dependent X-ray AGN Clustering ?

M. Plionis, M. Rovilos, S. Basilakos +2

We have analysed the angular clustering of X-ray selected active galactic nuclei (AGN) in different flux-limited sub-samples of the Chandra Deep Field North (CDF-N) and South (CDF-…

astro-ph2007★ 51 cited

Ultraviolet, Optical, and Infrared Constraints on Models of Stellar Populations and Dust Attenuation

Benjamin D. Johnson, David Schiminovich, Mark Seibert +19

The color of galaxies is a fundamental property, easily measured, that constrains models of galaxies and their evolution. Dust attenuation and star formation history (SFH) are the…

astro-ph2007★ 77 cited

Gravitational Waves From the End of Inflation: Computational Strategies

Richard Easther, John T. Giblin, Eugene A. Lim

Parametric resonance or preheating is a plausible mechanism for bringing about the transition between the inflationary phase and a hot, radiation dominated universe. This epoch res…

cond-mat.str-el2007★ 116 cited

Optical conductivity and the correlation strength of high temperature copper-oxide superconductors

A. Comanac, L de Medici, M. Capone +1

High temperature copper-oxide-based superconductivity is obtained by adding carriers to insulating "parent compounds". It is widely believed the parent compounds are "Mott" insulat…

hep-ex2007★ 41 cited

Model-independent measurement of the W boson helicity in top quark decays

D0 Collaboration, V. M. Abazov

We present the first model-independent measurement of the helicity of bosons produced in top quark decays, based on a 1 fb sample of candidate events in the d…

stat.AP2007★ 43 cited

Accounting for spatial correlation in the scan statistic

Ji Meng Loh, Zhengyuan Zhu

The spatial scan statistic is widely used in epidemiology and medical studies as a tool to identify hotspots of diseases. The classical spatial scan statistic assumes the number of…

astro-ph2007★ 93 cited

Pre-Merger Localization of Gravitational-Wave Standard Sirens With LISA: Triggered Search for an Electromagnetic Counterpart

Bence Kocsis, Zoltan Haiman, Kristen Menou

Electromagnetic (EM) counterparts to supermassive black hole binary mergers observed by LISA can be localized to within the field of view of astronomical instruments ~10 deg^2 hour…

hep-ex2007★ 42 cited

Study of ATLAS sensitivity to FCNC top decays

J. Carvalho, N. Castro, L. Chikovani +6

The ATLAS experiment sensitivity to top quark Flavour Changing Neutral Current (FCNC) decays was studied at LHC using ttbar events. While one of the top quarks is expected to follo…

hep-lat2007★ 100 cited

Non-perturbative renormalization of quark bilinear operators and B_K using domain wall fermions

Y. Aoki, P. A. Boyle, N. H. Christ +11

We present a calculation of the renormalization coefficients of the quark bilinear operators and the K-Kbar mixing parameter B_K. The coefficients relating the bare lattice operato…

hep-ex2007★ 239 cited

First measurement of the forward-backward charge asymmetry in top quark pair production

D0 Collaboration, V. M. Abazov

We present the first measurement of the integrated forward-backward charge asymmetry in top-antitop quark pair (ttbar) production in proton-antiproton collisions in the lepton plus…

hep-ex2007★ 37 cited

Search for ZZ and Zγ^* production in p-barp collisions at sqrt(s) = 1.96 TeV and limits on anomalous ZZZ and ZZγ^* couplings

D0 Collaboration, V. Abazov

We present a study of four muon, four electron, and two muon two electron events using 1 fb^(-1) of data collected with the D0 detector at the Fermilab Tevatron p-barp Collider at…

hep-ex2007★ 18 cited

A combined search for the standard model Higgs boson at sqrt{s}=1.96 TeV

D0 Collaboration, V. M. Abazov

We present new results of the search for WH to lepton neutrino b b production in ppbar collisions at a center of mass energy of sqrt{s}=1.96 TeV, based on a dataset with integrated…

math.GR2007

Commensurability and QI classification of free products of finitely generated abelian groups

Jason Behrstock, Tadeusz Januszkiewicz, Walter Neumann

Suppose a group is quasi-isometric to a free product of a finite set of finitely generated abelian groups; let denote the set of ranks of the free abelian parts of the…

astro-ph2007★ 252 cited

UV/Optical Detections of Candidate Tidal Disruption Events by GALEX and CFHTLS

S. Gezari, S. Basa, D. C. Martin +11

We present two luminous UV/optical flares from the nuclei of apparently inactive early-type galaxies at z=0.37 and 0.33 that have the radiative properties of a flare from the tidal…

hep-ex2007★ 125 cited

Search for squarks and gluinos in events with jets and missing transverse energy using 2.1 fb-1 of ppbar collision data at sqrt(s)=1.96 TeV

D0 Collaboration, V. Abazov

A data sample corresponding to an integrated luminosity of 2.1 fb-1 collected by the D0 detector at the Fermilab Tevatron Collider was analyzed to search for squarks and gluinos pr…

hep-ex2007★ 32 cited

Measurement of the B0_s semileptonic branching ratio to an orbitally excited D_s** state, Br(B0_s -> Ds1(2536) mu nu)

D0 Collaboration, V. Abazov

In a data sample of approximately 1.3 fb-1 collected with the D0 detector between 2002 and 2006, the orbitally excited charm state D_s1(2536) has been observed with a measured mass…