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Showing 2007Show all

159 papers · 1 filter

cond-mat.soft2007★ 8 cited

Molecular Motors Interacting with Their Own Tracks

Max N. Artyomov, Alexander Yu. Morozov, Anatoly B. Kolomeisky

Dynamics of molecular motors that move along linear lattices and interact with them via reversible destruction of specific lattice bonds is investigated theoretically by analyzing…

astro-ph2007★ 6 cited

Helioseismic Ring Analysis of CME Source Regions

S. C. Tripathy, S. de Wet, K. Jain +2

We apply the ring diagram technique to source regions of halo coronal mass ejections (CMEs) to study changes in acoustic mode parameters before, during, and after the onset of CMEs…

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…

math.GT2007★ 4 cited

On Transverse Knots and Branched Covers

Shelly Harvey, Keiko Kawamuro, Olga Plamenevskaya

We study contact manifolds that arise as cyclic branched covers of transverse knots in the standard contact 3-sphere. We discuss properties of these contact manifolds and describe…

math.GT2007★ 1 cited

The First-Order Genus of a Knot

Peter Horn

We introduce a geometric invariant of knots in the three-sphere, called the first-order genus, that is derived from certain 2-complexes called gropes, and we show it is computable…

math.DG2007★ 19 cited

Projective structures, grafting, and measured laminations

David Dumas, Michael Wolf

We show that grafting any fixed hyperbolic surface defines a homeomorphism from the space of measured laminations to Teichmuller space, complementing a result of Scannell-Wolf on g…

math.GM2007

The cycle problem: an intriguing periodicity to the zeros of the Riemann zeta function

David D. Baugh

Summing the values of the real portion of the logarithmic integral of n^rho, where rho is one of a consecutive series of zeros of the Riemann zeta function, reveals an unexpected p…

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…

hep-ex2007★ 29 cited

Beam spin asymmetry in deep and exclusive pi0 electroproduction

CLAS Collaboration, R. De Masi

The beam spin asymmetry (BSA) in the exclusive reaction ep->ep pi0 was measured with the CEBAF 5.77 GeV polarized electron beam and Large Acceptance Spectrometer(CLAS). The xB, Q2,…

astro-ph2007★ 182 cited

XO-3b: A Massive Planet in an Eccentric Orbit Transiting an F5V Star

Christopher M. Johns-Krull, Peter R. McCullough, Christopher J. Burke +13

We report the discovery of a massive (Mpsini = 13.02 +/- 0.64 Mjup; total mass 13.25 +/- 0.64 Mjup), large (1.95 +/- 0.16 Rjup) planet in a transiting, eccentric orbit (e = 0.260 +…

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…

nucl-ex2007★ 7 cited

Ratios of 15N/12C and 4He/12C inclusive electroproduction cross sections in the nucleon resonance region

CLAS Collaboration, P. E. Bosted, R. Fersch

The (W,Q2)-dependence of the ratio of inclusive electron scattering cross sections for 15N/12C was determined in the kinematic range 0.8<W<2 GeV and 0.2<Q2<1 GeV2 using 2.285 GeV e…

physics.atom-ph2007★ 2 cited

Analytic models of ultra-cold atomic collisions at negative energies for application to confinement-induced resonances

S. G. Bhongale, S. J. J. M. F. Kokkelmans, Ivan H. Deutsch

We construct simple analytic models of the -matrix, accounting for both scattering resonances and smooth background contributions for collisions that occur below the s-wave thre…

math-ph2007★ 6 cited

Uniform existence of the integrated density of states for combinatorial and metric graphs over Z^d

Michael J. Gruber, Daniel H. Lenz, Ivan Veselić

We give an overview and extension of recent results on ergodic random Schrödinger operators for models on . The operators we consider are defined on combinatorial or…

hep-ex2007★ 126 cited

Measurement of the shape of the boson transverse momentum distribution in ppbar -> Z/gamma* -> ee+X events produced at sqrt{s}=1.96 TeV

D0 Collaboration, V. Abazov

We present a measurement of the shape of the Z/gamma* boson transverse momentum (qT) distribution in ppbar -> Z/gamma* -> ee+X events at a center-of-mass energy of 1.96 TeV using 0…

astro-ph2007★ 13 cited

Warm Molecular Gas in M51: Mapping the Excitation Temperature and Mass of H_2 with the Spitzer Infrared Spectrograph

G. Brunner, K. Sheth, L. Armus +7

We have mapped the warm molecular gas traced by the H_2 S(0) - H_2 S(5) pure rotational mid-infrared emission lines over a radial strip across the nucleus and disk of M51 (NGC 5194…

math.DS2007★ 39 cited

Absolute Continuity of the Integrated Density of States for the Almost Mathieu Operator with Non-Critical Coupling

Artur Avila, David Damanik

We show that the integrated density of states of the almost Mathieu operator is absolutely continuous if and only if the coupling is non-critical. We deduce for subcritical couplin…

cond-mat.other2007★ 17 cited

BEC "level" for measuring small forces

S. G. Bhongale, Eddy Timmermans

We propose a device that consists of a trapped two-component phase- separated Bose-Einstein condensate to measure small forces and map weak potential energy landscapes. The resolut…

cond-mat.str-el2007★ 6 cited

Bose-Fermi Kondo model with Ising anisotropy: cluster-Monte Carlo approach

Stefan Kirchner, Qimiao Si

The Bose-Fermi Kondo model captures the physics of the destruction of Kondo screening, which is of extensive current interest to the understanding of quantum critical heavy fermion…

astro-ph2007★ 173 cited

The double Subgiant Branch of NGC 1851: the role of the CNO abundance

S. Cassisi, M. Salaris, A. Pietrinferni +4

We explore the possibility that the anomalous split in the Subgiant branch of the galactic globular cluster NGC 1851 is due to the presence of two distinct stellar populations with…

hep-ex2007★ 73 cited

Search for Lepton Flavor Violating Decays of the Neutral Kaon

KTeV collaboration, A. Abouzaid

The Fermilab KTeV experiment has searched for lepton flavor violating decays of the KL meson in three decay modes. We observe no events in the signal region for any of the modes st…