11,644 research outputs found
Single Top production at CMS
A first measurement of the cross section of single top quark production in
the t channel in pp collision at sqrt(s)=7 TeV is presented. The measurement is
performed on a data sample corresponding to an integrated luminosity of 35.9
pb^-1 recorded at the LHC with the CMS detector. Leptonic decay channels with
an electron or a muon in the final state are considered. After a selection
optimized for the t-channel mode, two different and complementary analyses have
been performed. Both analyses confirm the Tevatron's observation of single top,
and their combination measures a cross section of sigma = 83.6 +/-
29.8(stat.+syst.) +/- 3.3 (lumi.) pb, which is consistent with the Standard
Model prediction.Comment: 7 pages, 3 figures, Proceedings of the DPF-2011 Conference,
Providence, RI, August 8-13, 201
The CMS Silicon Strip Tracker
With over 200 square meters of sensitive Silicon and almost 10 million
readout channels, the Silicon Strip Tracker of the CMS experiment at the LHC
will be the largest Silicon strip detector ever built. The design, construction
and expected performance of the CMS Tracker is reviewed in the following.Comment: 8 pages, 8 figures, talk given at XIX EPS NPDC Conference on "New
Trends in Nuclear Physics Applications and Technology", September 5-9, 2005
Pavia, Ital
Luminoso at SemEval-2018 Task 10: Distinguishing Attributes Using Text Corpora and Relational Knowledge
Luminoso participated in the SemEval 2018 task on "Capturing Discriminative
Attributes" with a system based on ConceptNet, an open knowledge graph focused
on general knowledge. In this paper, we describe how we trained a linear
classifier on a small number of semantically-informed features to achieve an
score of 0.7368 on the task, close to the task's high score of 0.75.Comment: SemEval 2018, 5 page
Anisotropic diffusion in square lattice potentials: giant enhancement and control
The unbiased thermal diffusion of an overdamped Brownian particle in a square
lattice potential is considered in the presence of an externally applied ac
driving. The resulting diffusion matrix exhibits two orthogonal eigenvectors
with eigenvalues , indicating anisotropic diffusion along a "fast"
and a "slow principal axis". For sufficiently small temperatures, may
become arbitrarily large and at the same time arbitrarily small. The
principal diffusion axis can be made to point into (almost) any direction by
varying either the driving amplitude or the coupling of the particle to the
potential, without changing any other property of the system or the driving.Comment: 7 pages, 7 figure
Exploiting lattice potentials for sorting chiral particles
Several ways are demonstrated of how periodic potentials can be exploited for
sorting molecules or other small objects which only differ by their chirality.
With the help of a static bias force, the two chiral partners can be made to
move along orthogonal directions. Time-periodic external forces even lead to
motion into exactly opposite directions.Comment: 4 pages, 4 figure
Higher loop corrections to a Schwinger--Dyson equation
We consider the effects of higherloop corrections to a Schwinger--Dyson
equations for propagators. This is made possible by the efficiency of the
methods we developed in preceding works, still using the supersymmetric
Wess--Zumino model as a laboratory. We obtain the dominant contributions of the
three and four loop primitive divergences at high order in perturbation theory,
without the need for their full evaluations. Our main conclusion is that the
asymptotic behavior of the perturbative series of the renormalization function
remains unchanged, and we conjecture that this will remain the case for all
finite order corrections.Comment: 12 pages, 2 imbedded TiKZ pictures. A few clarifications matching the
published versio
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