Showing 2009Show all

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astro-ph.GA2009★ 36 cited

The Radio Properties and Magnetic Field Configuration in the Crab-like Pulsar Wind Nebula G54.1+0.3

Cornelia C. Lang, Q. Daniel Wang, Fangjun Lu +1

We present a multifrequency radio investigation of the Crab-like pulsar wind nebula (PWN) G54.1+0.3 using the Very Large Array. The high resolution of the observations reveals that…

quant-ph2009★ 8 cited

Beyond spontaneously broken symmetry in Bose-Einstein condensates

W. J. Mullin, F. Laloë

Spontaneous symmetry breaking (SSB) for Bose-Einstein condensates cannot treat phase off-diagonal effects, and thus not explain Bell inequality violations. We describe another situ…

nlin.PS2009★ 44 cited

Short pulse equations and localized structures in frequency band gaps of nonlinear metamaterials

N. L. Tsitsas, T. P. Horikis, Y. Shen +3

We consider short pulse propagation in nonlinear metamaterials characterized by a weak Kerr-type nonlinearity in their dielectric response. In the frequency "band gaps" (where line…

hep-ex2009★ 12 cited

Search for New Physics with a Dijet plus Missing Transverse Energy Signature in p-pbar Collisions at sqrt(s) = 1.96 TeV

T. Aaltonen

We present results of a signature-based search for new physics using a dijet plus missing transverse energy data sample collected in 2 fb-1 of p-pbar collisions at sqrt(s) = 1.96 T…

gr-qc2009★ 31 cited

Breaking Diffeomorphism Invariance and Tests for the Emergence of Gravity

Mohamed M. Anber, Ufuk Aydemir, John F. Donoghue

If general relativity is an emergent phenomenon, there may be small violations of diffeomorphism invariance. We propose a phenomenology of perturbatively small violations of genera…

hep-ex2009★ 28 cited

A study of the associated production of photons and b-quark jets in p-pbar collisions at sqrt{s} = 1.96 TeV

CDF collaboration

The cross section for photon production in association with at least one jet containing a -quark hadron has been measured in proton antiproton collisions at TeV.…

hep-ex2009★ 81 cited

A Search for B+ -> tau+ nu Recoiling Against B- -> D0 l- nu X

The BABAR Collaboration, B. Aubert

We present a search for the decay () in pairs recorded with the BABAR detector at the PEP-II B-Facto…

cond-mat.quant-gas2009★ 60 cited

Critical entropies for magnetic ordering in bosonic mixtures on a lattice

B. Capogrosso-Sansone, Ş. G. Söyler, N. V. Prokof'ev +1

We perform a numeric study (worm algorithm Monte Carlo simulations) of ultracold two-component bosons in two- and three-dimensional optical lattices. At strong enough interactions…

astro-ph.CO2009★ 129 cited

Stellar Ages and Metallicities of Central and Satellite Galaxies: Implications for Galaxy Formation and Evolution

Anna Pasquali, Anna Gallazzi, Fabio Fontanot +4

Using a large SDSS galaxy group catalogue, we study how the stellar ages and metallicities of central and satellite galaxies depend on stellar mass and halo mass. We find that sate…

cond-mat.soft2009★ 16 cited

Particle kinematics in a dilute, 3-dimensional, vibration-fluidized granular medium

Hong-Qiang Wang, Klebert Feitosa, Narayanan Menon

We report an experimental study of particle kinematics in a 3-dimensional system of inelastic spheres fluidized by intense vibration. The motion of particles in the interior of the…

hep-ex2009★ 83 cited

Search for Fermion-Pair Decays $Q\Qbar \to (\t\Wmp)(\tbar\Wpm)$ in Same-Charge Dilepton Events

The CDF Collaboration

We report the most restrictive direct limits on masses of fourth-generation down-type quarks , and quark-like composite fermions ( or ), decaying promptly t…

cs.DB2009★ 13 cited

Optimizing Histogram Queries under Differential Privacy

Chao Li, Michael Hay, Vibhor Rastogi +2

Differential privacy is a robust privacy standard that has been successfully applied to a range of data analysis tasks. Despite much recent work, optimal strategies for answering a…

astro-ph.CO2009★ 67 cited

The unusual NIV]-emitter galaxy GDS J033218.92-275302.7: star formation or AGN-driven winds from a massive galaxy at z=5.56

E. Vanzella, A. Grazian, M. Hayes +8

Aims: We investigate the nature of the source GDS J033218.92-275302.7at redshift ~ 5.56. Methods: The SED of the source is well sampled by 16 bands photometry, from UV-optical, nea…

physics.ins-det2009★ 95 cited

Readiness of the ATLAS Liquid Argon Calorimeter for LHC Collisions

The ATLAS Collaboration

The ATLAS liquid argon calorimeter has been operating continuously since August 2006. At this time, only part of the calorimeter was readout, but since the beginning of 2008, all c…

astro-ph.CO2009★ 41 cited

Using 21cm Absorption in Small Impact Parameter Galaxy-QSO Pairs to Probe Low-Redshift Damped and Sub-Damped Lyman-alpha System

Sanchayeeta Borthakur, Todd M. Tripp, Min S. Yun +4

To search for low-redshift damped Lyman-alpha (DLA) and sub-DLA quasar absorbers, we have conducted a 21cm absorption survey of radio-loud quasars at small impact parameters to for…

hep-ex2009★ 85 cited

Transverse momentum dependence of J/psi polarization at midrapidity in p+p collisions at sqrt(s)=200 GeV

PHENIX Collaboration, A. Adare

We report the measurement of the transverse momentum dependence of inclusive J/psi polarization in p+p collisions at sqrt(s)=200 GeV performed by the PHENIX Experiment at RHIC. The…

astro-ph.CO2009★ 203 cited

On the Stellar Populations and Evolution of Star-Forming Galaxies at 6.3 < z < 8.6

Steven L. Finkelstein, Casey Papovich, Mauro Giavalisco +4

We study the physical characteristics of galaxies at 6.3 < z < 8.6, selected from deep near-infrared imaging with the Wide Field Camera 3 (WFC3) on board the Hubble Space Telescope…

astro-ph.GA2009★ 50 cited

The Stellar Mass Components of Galaxies: Comparing Semi-Analytical Models with Observation

Lei Liu, Xiaohu Yang, H. J. Mo +2

We compare the stellar masses of central and satellite galaxies predicted by three independent semianalytical models with observational results obtained from a large galaxy group c…

astro-ph.CO2009★ 491 cited

Feedback and Recycled Wind Accretion: Assembling the z=0 Galaxy Mass Function

Benjamin D. Oppenheimer, Romeel Davé, Dušan Kereš +4

We analyse cosmological hydrodynamic simulations that include observationally-constrained prescriptions for galactic outflows. If these simulated winds accurately represent winds i…

astro-ph.CO2009★ 98 cited

Powerful H Line-cooling in Stephan's Quintet : I - Mapping the Significant Cooling Pathways in Group-wide Shocks

M. E. Cluver, P. N. Appleton, F. Boulanger +10

We present results from the mid-infrared spectral mapping of Stephan's Quintet using the Spitzer Space Telescope. A 1000 km/s collision has produced a group-wide shock and for the…

cond-mat.quant-gas2009★ 49 cited

Beliaev technique for a weakly interacting Bose gas

B. Capogrosso-Sansone, S. Giorgini, S. Pilati +4

Aiming for simplicity of explicit equations and at the same time controllable accuracy of the theory we present results for all thermodynamic quantities and correlation functions f…

cond-mat.quant-gas2009★ 52 cited

Distribution of eigenfrequencies for oscillations of the ground state in the Thomas--Fermi limit

P. G. Kevrekidis, D. E. Pelinovsky

In this work, we present a systematic derivation of the distribution of eigenfrequencies for oscillations of the ground state of a repulsive Bose-Einstein condensate in the semi-cl…

astro-ph.CO2009★ 74 cited

The [OIII] emission line luminosity function of optically selected type-2 AGN from zCOSMOS

A. Bongiorno, M. Mignoli, G. Zamorani +61

We present a catalog of 213 type-2 AGN selected from the zCOSMOS survey. The selected sample covers a wide redshift range (0.15<z<0.92) and is deeper than any other previous study,…

nlin.PS2009★ 289 cited

Discrete Breathers in One-Dimensional Diatomic Granular Crystals

N. Boechler, G. Theocharis, S. Job +3

We report the experimental observation of discrete breathers in a one-dimensional diatomic granular crystal composed of compressed elastic beads that interact via Hertzian contact.…