Showing 2007Show all

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math.PR2007★ 3 cited

Standard representation of multivariate functions on a general probability space

Svante Janson

It is well-known that a random variable, i.e., a function defined on a probability space, with values in a Borel space, can be represented on the special probability space consisti…

nucl-ex2007★ 14 cited

Single- and Double-Pion Production in Nucleon Collisions on the Nucleon and on Nuclei -- the ABC Effect and its Possible Origin in a Dibaryonic Resonance

H. Clement, M. Bashkanov, E. Doroshkevich +5

The ABC effect -- an intriguing low-mass enhancement in the invariant mass spectrum -- is known from inclusive measurements of two-pion production in nuclear fusion reactions.…

astro-ph2007★ 18 cited

The discovery of high-amplitude 10.9-minute oscillations in the cool magnetic Ap star HD 115226

O. Kochukhov, T. Ryabchikova, S. Bagnulo +1

We present the discovery of pulsational variations in the cool magnetic Ap star HD 115226 -- the first high-amplitude rapidly oscillating Ap star discovered with time-series spectr…

math.RT2007★ 2 cited

A new approach to Kostant's problem

Johan Kåhrström, Volodymyr Mazorchuk

For every involution of the symmetric group we establish, in terms ofa special canonical quotient of the dominant Verma module associated with , an e…

math.RT2007★ 1 cited

On the irreducible representations of a finite semigroup

Olexandr Ganyushkin, Volodymyr Mazorchuk, Benjamin Steinberg

Work of Clifford, Munn and Ponizovski{\uı} parameterized the irreducible representations of a finite semigroup in terms of the irreducible representations of its maximal subgroups.…

math.PR2007★ 288 cited

Graph limits and exchangeable random graphs

Persi Diaconis, Svante Janson

We develop a clear connection between deFinetti's theorem for exchangeable arrays (work of Aldous--Hoover--Kallenberg) and the emerging area of graph limits (work of Lovasz and man…

astro-ph2007★ 1 cited

Magnetic Doppler Imaging of Active Stars

O. Kochukhov, N. Piskunov

We present a new implementation of the magnetic Doppler imaging technique, which aims at self-consistent temperature and magnetic mapping of the surface structures in cool active s…

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…

hep-th2007★ 96 cited

A Generalized Scaling Function for AdS/CFT

Lisa Freyhult, Adam Rej, Matthias Staudacher

We study a refined large spin limit for twist operators in the sl(2) sector of AdS/CFT. We derive a novel non-perturbative equation for the generalized two-parameter scaling functi…

hep-ph2007★ 1 cited

Baryon number violation and a new electroweak interaction

M. N. Chernodub, Antti J. Niemi

We introduce a new supercurrent in the electroweak sector of the standard model. Its interaction with the hypergauge field influences the mass of the Z boson but has no effect on t…

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…

math.CT2007★ 137 cited

Understanding the small object argument

Richard Garner

The small object argument is a transfinite construction which, starting from a set of maps in a category, generates a weak factorisation system on that category. As useful as it is…

astro-ph2007

Search for Ultra High-Energy Neutrinos with AMANDA-II

The IceCube Collaboration, M. Ackermann

A search for diffuse neutrinos with energies in excess of 10^5 GeV is conducted with AMANDA-II data recorded between 2000 and 2002. Above 10^7 GeV, the Earth is essentially opaque…

q-bio.OT2007

Newton-type Methods for REML Estimation in Genetic Analysis of Quantitative Traits

Kateryna Mishchenko, Sverker Holmgren, Lars Ronnegard

Robust and efficient optimization methods for variance component estimation using Restricted Maximum Likelihood (REML) models for genetic mapping of quantitative traits are conside…

hep-ph2007★ 318 cited

Heavy Ion Collisions at the LHC - Last Call for Predictions

S. Abreu, S. V. Akkelin, J. Alam +164

This writeup is a compilation of the predictions for the forthcoming Heavy Ion Program at the Large Hadron Collider, as presented at the CERN Theory Institute 'Heavy Ion Collisions…

hep-ex2007★ 76 cited

Observation and properties of the orbitally excited B_{s2}* Meson

D0 Collaboration, V. Abazov et al

We report the direct observation of the excited L=1 state B_{s2}* in fully reconstructed decays to B+K-. The mass of the B_{s2}* meson is measured to be {5839.6 +- 1.1 (stat.) +- 0…

cond-mat.mtrl-sci2007★ 248 cited

Proving the Perdew-Burke-Ernzerhof density functional designed for metallic bulk and surface systems

M. Ropo, K. Kokko, L. Vitos

We test the accuracy of the revised Perdew-Burke-Ernzerhof exchange-correlation density functional (PBEsol) for metallic bulk and surface systems. It is shown that, on average, PBE…

hep-ex2007★ 43 cited

Measurement of eta meson decays into lepton-antilepton pairs

WASA Collaboration, M. Berłowski, Chr. Bargholtz +50

A search for rare lepton decays of the eta meson was performed using the WASA detector at CELSIUS. Two candidates for double Dalitz decay eta->e+e-e+e- events are reported with a b…

quant-ph2007★ 4 cited

Holonomy for Quantum Channels

David Kult, Johan Åberg, Erik Sjöqvist

A quantum holonomy reflects the curvature of some underlying structure of quantum mechanical systems, such as that associated with quantum states. Here, we extend the notion of hol…

math.CT2007★ 23 cited

The low-dimensional structures formed by tricategories

Richard Garner, Nick Gurski

We form tricategories and the homomorphisms between them into a bicategory, whose 2-cells are certain degenerate tritransformations. We then enrich this bicategory into an example…

hep-ph2007★ 16 cited

New angles on top quark decay to a charged Higgs

David Eriksson, Gunnar Ingelman, Johan Rathsman +1

To properly discover a charged Higgs Boson () requires its spin and couplings to be determined. We investigate how to utilize $\ttbar$ spin correlations to analyze the $H^\p…

cond-mat.other2007★ 3 cited

An Atom Laser is not monochromatic

S. Choi, D. Stromberg, B. Sundaram

We study both numerically and analytically the possibility of using an adiabatic passage control method to construct a Mach-Zehnder interferometer (MZI) for Bose-Einstein condensat…

hep-ex2007★ 67 cited

Search for W' bosons decaying to an electron and a neutrino with the D0 detector

D0 Collaboration, V. Abazov

This Letter describes the search for a new heavy charged gauge boson W' decaying into an electron and a neutrino. The data were collected with the D0 detector at the Fermilab Tevat…

hep-ph2007★ 46 cited

Associated production of a Kaluza-Klein excitation of a gluon with a t t(bar) pair at the LHC

M. Guchait, F. Mahmoudi, K. Sridhar

In Randall-Sundrum models, the Kaluza-Klein (KK) excitations of the gluon, g_{KK} have enhanced couplings to the right-handed quarks. In the absence of a gg g_{KK} coupling in thes…