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Showing 2001Show all

65 papers · 1 filter

nucl-ex2001★ 33 cited

Backward spin polarizability of the proton

M. Camen, K. Kossert, F. Wissmann +21

Using the Mainz NaI(Tl) detector and the segmented Göttingen recoil detector SENECA in coincidence, Compton scattering by the proton at …

hep-ex2001

Jet production in deep inelastic ep scattering at HERA and determination of alpha_s

C. Glasman

Recent measurements of jet cross sections in neutral-current and charged-current deep inelastic ep scattering are presented. The results of the QCD analyses on these measurements t…

astro-ph2001★ 37 cited

Profile Shapes for Optically Thick X-ray Emission Lines from Stellar Winds

R. Ignace, K. G. Gayley

We consider the consequences of appreciable line optical depth for the profile shape of X-ray emission lines formed in stellar winds. The hot gas is thought to arise in distributed…

hep-ph2001★ 86 cited

Measurement of the Total Cross Section and Differential Cross Section in Collisions at TeV

The CDF collaboration

We present measurements of the B+ meson total cross section and differential cross section . The measurements use a pb^{-1} sample of collisions at $…

hep-lat2001★ 11 cited

Composite reweighting SU(2) QCD at Finite Temperature

P. R. Crompton

The Glasgow reweighting method is evaluated for SU(2) lattice gauge theory at nonzero μand finite T. We establish that the ' overlap problem' of SU(3) measurements, in which the tr…

gr-qc2001★ 13 cited

Performance of a 1200m long suspended Fabry-Perot cavity

A. Freise, M. M. Casey, S. Gossler +9

Using one arm of the Michelson interferometer and the power recycling mirror of the interferometric gravitational wave detector GEO600, we created a Fabry-Perot cavity with a lengt…

hep-ex2001★ 21 cited

First Measurement of the Double Spin Asymmetry in in the Resonance Region

CLAS Collaboration, R. De Vita

The double spin asymmetry in the reaction has been measured for the first time in the resonance region for four-momentum transfer GeV$^2…

hep-ex2001

The ALEPH Search for the Standard Model Higgs Boson

J. A. Kennedy

A search has been performed for the Standard Model Higgs boson in the data collected with the ALEPH detector in 2000. An excess of 3 sigma above the background expectation is found…

hep-lat2001★ 280 cited

Constrained Curve Fitting

G. P. Lepage, B. Clark, C. T. H. Davies +4

We survey techniques for constrained curve fitting, based upon Bayesian statistics, that offer significant advantages over conventional techniques used by lattice field theorists.

hep-ph2001★ 7 cited

"Glueballs": results and perspectives from the lattice

Gunnar S. Bali

I review the present status of lattice calculations of properties of gluon-rich hadrons and comment on future prospects, in view of planned experiments.

hep-lat2001★ 7 cited

A nonperturbative determination of the O(a) improvement coefficient c_A and the scaling of f_pi and m^{MSbar}

S. Collins, C. T. H. Davies, G. P. Lepage +1

We report on an investigation of the LANL method for determining the O(a) improvement coefficient c_A nonperturbatively. We find we are able to extract reliable estimates for the c…

hep-lat2001★ 1 cited

The Static Potential to O(α^2) in Lattice Perturbation Theory

Peter Boyle, Gunnar S Bali

We present a calculation of Wilson loops, and the static inter-quark potential to in lattice perturbation theory. This is carried out with the Wilson, Symanzik-Weisz, and…

hep-lat2001

Where do perturbative and non-perturbative QCD meet?

G. S. Bali, P. Boyle, C. T. H. Davies

We computed the static potential and Wilson loops to in perturbation theory for different lattice quark and gluon actions. In general, we find short distance lattice data…

math.RT2001

Nahm's equations, configuration spaces and flag manifolds

Michael Atiyah, Roger Bielawski

We give a positive answer to the Berry-Robbins problem for any compact Lie group G, i.e. we show the existence of a smooth W-equivariant map from the space of regular triples in a…

hep-ex2001★ 16 cited

Search for New Physics in Photon-Lepton Events in Proton-Antiproton Collisions at sqrt(s) = 1.8 TeV

CDF Collaboration

We present the results of a search in proton-antiproton collisions at sqrt(s) = 1.8 TeV for anomalous production of events containing a photon with large transverse energy and a le…

hep-lat2001★ 1 cited

F_B from moving B mesons

S. Collins, G. Cowan, C. T. H. Davies +4

We show results for the B meson decay constant calculated both for B mesons at rest and those with non-zero momentum and using both the temporal and spatial components of the axial…

hep-ph2001★ 6 cited

Heavy Flavour Physics at HERA - a Survey

P. J. Bussey

At the HERA collider at DESY, high energy electron and positron beams interact with proton beams. A review is presented of the variety of ways in which these collisions produce fin…

hep-ph2001★ 7 cited

Cosmic microwave background and parametric resonance in reheating

A. B. Henriques, R. G. Moorhouse

The variation of the perturbative 3-curvature parameter, ζ, is investigated in the period of reheating after inflation. The two-field model used has the inflaton, with an extra sca…

gr-qc2001★ 339 cited

Thermal noise in interferometric gravitational wave detectors due to dielectric optical coatings

Gregory M. Harry, Andri M. Gretarsson, Peter R. Saulson +9

We report on thermal noise from the internal friction of dielectric coatings made from alternating layers of Ta2O5 and SiO2 deposited on fused silica substrates. We present calcula…

gr-qc2001★ 13 cited

Excess Mechanical Loss Associated with Dielectric Mirror Coatings on Test Masses in Interferometric Gravitational Wave Detectors

D. R. M. Crooks, P. Sneddon, G. Cagnoli +9

Interferometric gravitational wave detectors use mirrors whose substrates are formed from materials of low intrinsic mechanical dissipation. The two most likely choices for the tes…

nucl-ex2001★ 34 cited

Compton Scattering by the Proton using a Large-Acceptance Arrangement

S. Wolf, V. Lisin, R. Kondratiev +24

Compton scattering by the proton has been measured using the tagged-photon facility at MAMI (Mainz) and the large-acceptance arrangement LARA. The new data are interpreted in terms…

hep-ex2001★ 22 cited

Diffractive Dijet Production at sqrt(s)=630 and 1800 GeV at the Fermilab Tevatron

The CDF Collaboration, T. Affolder

We report a measurement of the diffractive structure function of the antiproton obtained from a study of dijet events produced in association with a leading antiproton i…

hep-ex2001★ 25 cited

Study of the heavy flavor content of jets produced in association with W bosons in collisions at = 1.8 TeV

CDF collaboration

We present a detailed examination of the heavy flavor content of the + jet data sample collected with the CDF detector during the 1992-1995 collider run at the Fermilab Tevatr…

hep-ph2001★ 56 cited

Minimal Mixing of Quarks and Leptons in the SU(3) Theory of Flavour

J. L. Chkareuli, C. D. Froggatt, H. B. Nielsen

We argue that flavour mixing, both in the quark and lepton sector, follows the minimal mixing pattern, according to which the whole of this mixing is basically determined by the ph…