pinecone/core-2020-05-10-deduplication huggingface dataset:
An Exact Renormalization Group analysis of 3-d Well Developed turbulence

We take advantage of peculiar properties of three dimensional incompressible
turbulence to introduce a nonstandard Exact Renormalization Group method. A
Galilean invariance preserving regularizing procedure is utilized and a field
truncation is adopted to test the method. Results are encouraging: the energy
spectrum E(k) in the inertial range scales with exponent -1.666+/- 0.001 and
the Kolmogorov constant C_K, computed for several (realistic) shapes of the
stirring force correlator, agrees with experimental data.Comment: 12 pg, 2figures, LaTex, To be published on Physics Letters
Role of Coulomb correlations in the optical spectra of semiconductor
  quantum dots

We present a consistent theoretical description of few-particle effects in
the optical spectra of semiconductor quantum dots, based on a
direct-diagonalization approach. We show that, because of the strong Coulomb
interaction among electrons and holes, each configuration of the confined
few-particle system leads to its characteristic signature in the optical
spectra. We discuss quantitative predictions and comparison with experiments
for both absorption and luminescence.Comment: 4 pages, 3 figures, revtex. Proc. 6th Int Workshop on Nonlinear
  Optics and Excitation Kinetics in Semiconductors (NOEKS 2000), Marburg,
  Germany. to be published in Phys. Stat. Sol. (2000
Bose-Einstein Correlations of pi0 Pairs from Hadronic Z0 Decays

We observed Bose-Einstein correlation in pi0 pairs produced in Z0 decays
using the data sample collected by the OPAL detector at LEP 1 from 1991 to
1995. Using a static Gaussian picture for the pion emitter source, we obtain
the chaoticity parameter lambda = 0.55 +- 0.10 +- 0.10 and the source radius R
= (0.59 +- 0.08 +- 0.05) fm. according to the JETSET and HERWIG Monte Carlo
models, the Bose-Einstein correlations in our data sample largely connect pi0s
originating from the decays of different hadrons. Prompt pions formed at string
break-up of cluster decays only form a small fraction of the sample.Comment: 18 pages, 5 figure
Highly-improved lattice field-strength tensor

We derive an O(a^4)-improved lattice version of the continuum field-strength
tensor. Discretization errors are reduced via the combination of several clover
terms of various sizes, complemented by tadpole improvement. The resulting
improved field-strength tensor is used to construct O(a^4)-improved topological
charge and action operators. We compare the values attained by these operators
as we cool several configurations to self-duality with a previously defined
highly-improved action and assess the relative scale of the remaining
discretization errors.Comment: 22 pages, 7 postscript figure
Ds+ -- Ds- Asymmetry in Photoproduction

Considering of the possible difference in strange and antistrange quark
distributions inside nucleon, we investigate the Ds+ -- Ds- asymmetry in
photoproduction in the framework of heavy-quark recombination mechanism. We
adopt two distribution models of strange sea, those are the light-cone
meson-baryon fluctuation model and the effective chiral quark model. Our
results show that the asymmetry induced by the strange quark distributions is
distinct, which is measurable in experiments. And, there are evident
differences between the predictions of our calculation and previous estimation.
Therefore, the experimental measurements on the Ds+ -- Ds- asymmetry may impose
a unique restriction on the strange-antistrange distribution asymmetry models.Comment: 11 page, 5 figure
A Possible Solution to the $B\to \pi\pi$ Puzzle Using the Principle of
  Maximum Conformality

The measured $B_d \to \pi^0\pi^0$ branching fraction deviates significantly
from conventional QCD predictions, a puzzle which has persisted for more than
10 years. This may be a hint of new physics beyond the Standard Model; however,
as we shall show in this paper, the pQCD prediction is highly sensitive to the
choice of the renormalization scales which enter the decay amplitude. In the
present paper, we show that the renormalization scale uncertainties for $B\to
\pi\pi$ can be greatly reduced by applying the Principle of Maximum
Conformality (PMC), and more precise predictions for CP-averaged branching
ratios ${\cal B}(B\to\pi\pi)$ can be achieved. Combining the errors in
quadrature, we obtain ${\cal B}(B_{d}\to \pi^0\pi^0)|_{\rm PMC} =
\left(0.98^{+0.44}_{-0.31}\right) \times10^{-6}$ by using the light-front
holographic low-energy model for the running coupling. All of the CP-averaged
$B\to\pi\pi$ branching fractions predicted by the PMC are consistent with the
Particle Data Group average values and the recent Belle data. Thus, the PMC
provides a possible solution for the $B_d \to \pi^0\pi^0$ puzzle.Comment: Comments: 7 pages, 1 figure, to be published at Phys.Lett.
3-D Interacting CFTs and Generalized Higgs Phenomenon in Higher Spin
  Theories on AdS

We study a duality, recently conjectured by Klebanov and Polyakov, between
higher-spin theories on AdS_4 and O(N) vector models in 3-d. These theories are
free in the UV and interacting in the IR. At the UV fixed point, the O(N) model
has an infinite number of higher-spin conserved currents. In the IR, these
currents are no longer conserved for spin s>2. In this paper, we show that the
dual interpretation of this fact is that all fields of spin s>2 in AdS_4 become
massive by a Higgs mechanism, that leaves the spin-2 field massless. We
identify the Higgs field and show how it relates to the RG flow connecting the
two CFTs, which is induced by a double trace deformation.Comment: 8 pages, latex; v2 references adde
Precession of a Freely Rotating Rigid Body: Inelastic Relaxation in the Vicinity of Poles

When a solid body is freely rotating at an angular velocity ${\bf \Omega}$, the ellipsoid of constant angular momentum, in the space $\Omega_1, \Omega_2, \Omega_3$, has poles corresponding to spinning about the minimal-inertia and maximal-inertia axes. The first pole may be considered stable if we neglect the inner dissipation, but becomes unstable if the dissipation is taken into account. This happens because the bodies dissipate energy when they rotate about any axis different from that of the maximal inertia. In the case of an oblate symmetrical body, the angular velocity describes a circular cone about the vector of (conserved) angular momentum. In the course of relaxation, the angle of this cone decreases, so that both the angular velocity and the maximal-inertia axis of the body align along the angular momentum. The generic case of an asymmetric body is far more involved. Even the symmetrical prolate body exhibits a sophisticated behaviour, because an infinitesimally small deviation of the body's shape from a rotational symmetry (i.e., a small difference between the largest and second largest moments of inertia) yields libration: the precession trajectory is not a circle but an ellipse. In this article we show that often the most effective internal dissipation takes place at twice the frequency of the body's precession. Applications to precessing asteroids, cosmic-dust alignment, and rotating satellites are discussed
Around the Hossz\'u-Gluskin theorem for $n$-ary groups

We survey results related to the important Hossz\'u-Gluskin Theorem on
$n$-ary groups adding also several new results and comments. The aim of this
paper is to write all such results in uniform and compressive forms. Therefore
some proofs of new results are only sketched or omitted if their completing
seems to be not too difficult for readers. In particular, we show as the
Hossz\'u-Gluskin Theorem can be used for evaluation how many different $n$-ary
groups (up to isomorphism) exist on some small sets. Moreover, we sketch as the
mentioned theorem can be also used for investigation of
$\mathcal{Q}$-independent subsets of semiabelian $n$-ary groups for some
special families $\mathcal{Q}$ of mappings
Existence and uniqueness of $v$-asymptotic expantions and Colombeau's
  generalized numbers

We define a type of generalized asymptotic series called $v$-asymptotic. We
show that every function with moderate growth at infinity has a $v$-asymptotic
expansion. We also describe the set of $v$-asymptotic series, where a given
function with moderate growth has a unique $v$-asymptotic expansion. As an
application to random matrix theory we calculate the coefficients and establish
the uniqueness of the $v$-asymptotic expansion of an integral with a large
parameter. As another application (with significance in the non-linear theory
of generalized functions) we show that every Colombeau's generalized number has
a $v$-asymptotic expansion. A similar result follows for Colombeau's
generalized functions, in particular, for all Schwartz distributions.Comment: 19 page
Proton--induced deuteron breakup at GeV energies with forward emission
  of a fast proton pair

A study of the deuteron breakup reaction $pd \to (pp)n$ with forward emission
of a fast proton pair with small excitation energy $E_{pp}<$ 3 MeV has been
performed at the ANKE spectrometer at COSY--J\"ulich. An exclusive measurement
was carried out at six proton--beam energies $T_p=$~0.6,~0.7,~0.8,~0.95,~1.35,
and 1.9 GeV by reconstructing the momenta of the two protons. The differential
cross section of the breakup reaction, averaged up to $8^{\circ}$ over the cm
polar angle of the total momentum of the $pp$ pairs, has been obtained. Since
the kinematics of this process is quite similar to that of backward elastic $pd
\to dp$ scattering, the results are compared to calculations based on a
theoretical model previously applied to the $pd \to dp$ process.Comment: 17 pages including 6 figures and 1 table v2: minor changes; v3: minor
  change of author list; v4: changes in accordance with referee remark
Rotational properties of $^{252, 253, 254}$No. Influence of pairing
  correlations

Rotational bands of $^{252, 253, 254}$No and the fission barriers of
$^{254}$No at spin 0$\hbar$ and 20$\hbar$ are calculated with the
Hartree-Fock-Bogolyubov theory and the Lipkin-Nogami approximate particle
number projection. The SLy4 Skyrme force is used in the particle-hole channel.
A zero-range force with and without density-dependence is used in the
particle-particle channel. The experimental ground state deformation
(${\cal{Q}}_{20}$ = 32.8 b) is reproduced as well as the increase of the
dynamical moment of inertia with frequency both for $^{252}$No and $^{254}$No.
  The rotational band of $^{253}$No is also calculated. Fission barriers of
$^{254}$No at spin 0$\hbar$ and 20$\hbar$ show the robustness of
shell-corrections against rotation in these heavy nuclei.Comment: 19 pages, 10 figures, Latex fil
Experimental comparison of dynamic tracking performance of iGPS and laser tracker

External metrology systems are increasingly being integrated with traditional industrial articulated robots, especially in the aerospace industries, to improve their absolute accuracy for precision operations such as drilling, machining and jigless assembly. While currently most of the metrology assisted robotics control systems are limited in their position update rate, such that the robot has to be stopped in order to receive a metrology coordinate update, some recent efforts are addressed toward controlling robots using real-time metrology data. The indoor GPS is one of the metrology systems that may be used to provide real-time 6DOF data to a robot controller. Even if there is a noteworthy literature dealing with the evaluation of iGPS performance, there is, however, a lack of literature on how well the iGPS performs under dynamic conditions. This paper presents an experimental evaluation of the dynamic measurement performance of the iGPS, tracking the trajectories of an industrial robot. The same experiment is also repeated using a laser tracker. Besides the experiment results presented, this paper also proposes a novel method for dynamic repeatability comparisons of tracking instruments
Abstract Syntax: Substitution and Binders

We summarise Fiore et al's paper on variable substitution and binding, then axiomatise it. Generalising their use of the category F of finite sets to model untyped cartesian contexts, we let S be an arbitrary pseudo-monad on Cat and consider op(S1): this generality includes linear contexts, affine contexts, and contexts for the Logic of Bunched Implications. Given a pseudo-distributive law of S over the (partial) pseudo-monad Tcoc−=[op(−),Set] for free cocompletions, one can define a canonical substitution monoidal structure on the category [op(S1),Set], generalising Fiore et al's substitution monoidal structure for cartesian contexts: this provides a natural substitution structure for the above examples. We give a concrete description of this substitution monoidal structure in full generality. We then give an axiomatic definition of a binding signature, then state and prove an initial algebra semantics theorem for binding signatures in full generality, once again extending the definitions and theorem of Fiore et al. A delicate extension of the research includes the category Pb(Injop,Set) studied by Gabbay and Pitts in their quite different analysis of binders, which we compare and contrast with that of Fiore et al
High-performance work systems and organizational performance in emerging economies : evidence from MNEs in Turkey

This study examines the association between the usage of high-performance work systems (HPWS) by subsidiaries of multinational enterprises (MNEs) in Turkey and employee and subsidiary level outcomes. The study is based on a survey of 148 MNE subsidiaries operating in Turkey. The results show that the usage of HPWS has a significant positive impact on employee effectiveness. However, their impact on employee skills and development, and organizational financial performance are far less clear. Our findings highlight the extent to which HWPS need to be adapted to take account of context-specific institutional realities
View FImP Miracle (by Scale Invariance) $\acute{\rm a}$ $\rm la$
  Self-interaction

Combining feebly interacting massive particle (FIMP) dark matter (DM) with
scale invariance (SI) leads to extremely light FIMP (thus the FImP) with FImP
miracle, i.e., the mass and relic generations of FImP DM share the same
dynamics. In this paper we show that due to the lightness of FImP, it,
especially for a scalar FImP, can easily accommodate large DM self-interaction.
For a fermionic FImP, such as the sterile neutrino, self-interaction
additionally requires a mediator which is another FImP, a scalar boson with
mass either much lighter or heavier than the FImP DM. DM self-interaction opens
a new window to observe FImP (miracle), which does not leave traces in the
conventional DM searches. As an example, FImP can account for the offsets
between the centroid of DM halo and stars of galaxies recently observed in the
galaxy cluster Abel 3827.Comment: references updated; 9 pages no figure
Radiative $\mu$ and $\tau$ leptonic decays at NLO

We present the differential rates and branching ratios of the radiative
decays $\tau \to l \bar{\nu} \nu \gamma$, with $l=e$ or $\mu$, and $\mu \to e
\bar{\nu} \nu \gamma$ in the Standard Model at next-to-leading order. Radiative
corrections are computed taking into account the full depencence on the mass
$m_l$ of the final charged leptons, which is necessary for the correct
determination of the branching ratios. Only partial agreement is found with
previous calculations performed in the $m_l \to 0$ limit. Our results agree
with the measurements of the branching ratios $\mathcal{B} (\mu \to e \bar{\nu}
\nu \gamma)$ and $\mathcal{B} (\tau \to \mu \bar{\nu} \nu \gamma)$ for a
minimum photon energy of 10 MeV in the $\mu$ and $\tau$ rest frames,
respectively. Babar's recent precise measurement of the branching ratio
$\mathcal{B} (\tau \to e \bar{\nu} \nu \gamma)$, for the same photon energy
threshold, differs from our prediction by 3.5 standard deviations.Comment: 13 pages, 1 figure, results included as ancillary file
Swift X-ray Telescope study of the Black Hole Binary MAXI J1659-152:
  Variability from a two component accretion flow

We present an energy dependent X-ray variability study of the 2010 outburst
of the black hole X-ray binary MAXI J1659-152 with the Swift X-ray Telescope
(XRT). The broad-band noise components and the quasi periodic oscillations
(QPO) observed in the power spectra show a strong and varied energy dependence.
Combining Swift XRT data with data from the Rossi X-ray Timing Explorer, we
report, for the first time, an rms spectrum (fractional rms amplitude as a
function of energy) of these components in the 0.5-30 keV energy range. We find
that the strength of the low-frequency component (< 0.1 Hz) decreases with
energy, contrary to the higher frequency components (> 0.1 Hz) whose strengths
increase with energy. In the context of the propagating fluctuations model for
X-ray variability, we suggest that the low-frequency component originates in
the accretion disk (which dominates emission below ~ 2 keV) and the higher
frequency components are formed in the hot flow (which dominates emission above
~ 2 keV). As the properties of the QPO suggest that it may have a different
driving mechanism, we investigate the Lense-Thirring precession of the hot flow
as a candidate model. We also report on the QPO coherence evolution for the
first time in the energy band below 2 keV. While there are strong indications
that the QPO is less coherent at energies below 2 keV than above 2 keV, the
coherence increases with intensity similar to what is observed at energies
above 2 keV in other black-hole X-ray binaries.Comment: 12 pages, 6 Figures, 2 Tables, Accepted for publication in
  Astrophysical Journa
Bootstrapping correlation functions in N=4 SYM

We describe a new approach to computing the chiral part of correlation
functions of stress-tensor supermultiplets in N=4 SYM that relies on
symmetries, analytic properties and the structure of the OPE only. We
demonstrate that the correlation functions are given by a linear combination of
chiral N=4 superconformal invariants accompanied by coefficient functions
depending on the space-time coordinates only. We present the explicit
construction of these invariants and show that the six-point correlation
function is fixed in the Born approximation up to four constant coefficients by
its symmetries. In addition, the known asymptotic structure of the correlation
function in the light-like limit fixes unambiguously these coefficients up to
an overall normalization. We demonstrate that the same approach can be applied
to obtain a representation for the six-point NMHV amplitude that is free from
any auxiliary gauge fixing parameters, does not involve spurious poles and
manifests half of the dual superconformal symmetry.Comment: LaTeX, 22 page
Supersymmetric and non-supersymmetric Seiberg-like dualities for gauged
  Wess-Zumino-Witten theories, realised on branes

In this work we extend the results of previous derivations of Seiberg-like
dualities (level-rank duality) between gauged Wess-Zumino-Witten theories. The
arguments in use to identify a potential dual for the supersymmetric WZW theory
based on the coset $\frac{U(N+M)_k}{U(N)_k}$ can be extended to be applied to a
wider variety of gauge groups, notably $\frac{USp(2N+2M)_{2k}}{USp(2N)_{2k}}$
and $\frac{SO(2N+2M)_{2k}}{SO(2N)_{2k}}$, which will be dealt with briefly.
Most interestingly, non-supersymmetric versions of the latter theories can also
be shown to have duals in a similar fashion. These results are supported by
several pieces of evidence, string phenomenological interpretations of Seiberg
duality, even in non-supersymmetric backgrounds, is helpful to justify the
formulation, then, from field theory, quantities such as central charges or
Witten indices are shown to match exactly. The stability of these
non-supersymmetric models is also discussed and shown to be consistent.Comment: 3 figures, 9 table
An extreme [OIII] emitter at $z=3.2$: a low metallicity Lyman continuum
  source

[Abridged] We investigate the physical properties of a Lyman continuum
emitter candidate at $z=3.212$ with photometric coverage from $U$ to MIPS
24$\mu$m band and VIMOS/VLT and MOSFIRE/Keck spectroscopy. Investigation of the
UV spectrum confirms a direct spectroscopic detection of the Lyman continuum
emission with $S/N>5$. Non-zero Ly$\alpha$ flux at the systemic redshift and
high Lyman-$\alpha$ escape fraction suggest a low HI column density. The weak C
and Si low-ionization absorption lines are also consistent with a low covering
fraction along the line of sight. The
[OIII]$\lambda\lambda4959,5007+\mathrm{H}\beta$ equivalent width is one of the
largest reported for a galaxy at $z>3$
($\mathrm{EW}([\mathrm{OIII}]\lambda\lambda4959,5007+\mathrm{H}\beta) \simeq
1600\AA$, rest-frame) and the NIR spectrum shows that this is mainly due to an
extremely strong [OIII] emission. The large observed [OIII]/[OII] ratio ($>10$)
and high ionization parameter are consistent with prediction from
photoionization models in case of a density-bounded nebula scenario.
Furthermore, the
$\mathrm{EW}([\mathrm{OIII}]\lambda\lambda4959,5007+\mathrm{H}\beta)$ is
comparable to recent measurements reported at $z\sim7-9$, in the reionization
epoch. We also investigate the possibility of an AGN contribution to explain
the ionizing emission but most of the AGN identification diagnostics suggest
that stellar emission dominates instead. This source is currently the first
high-$z$ example of a Lyman continuum emitter exhibiting indirect and direct
evidences of a Lyman continuum leakage and having physical properties
consistent with theoretical expectation from Lyman continuum emission from a
density-bounded nebula.Comment: 14 pages, 11 figures, accepted for publication in A&A. Minor
  modifications, Figure 2 updated, Figure 9 adde
Goldstone Boson Interaction in D=2+1 (Pseudo-)Lorentz-Invariant Systems
  with a Spontaneously Broken Internal Rotation Symmetry

The low-temperature properties of systems characterized by a spontaneously
broken internal rotation symmetry, O($N$) $\to$ O($N$-1), are governed by
Goldstone bosons and can be derived systematically within effective Lagrangian
field theory. In the present study we consider systems living in two spatial
dimensions, and evaluate their partition function at low temperatures up to
three-loop order. Although our results are valid for any such system, here we
use magnetic terminology, i.e., we refer to quantum spin systems. We discuss
the sign of the Goldstone boson interaction in the pressure, staggered
magnetization, and susceptibility as a function of an external staggered field
for general $N$. As it turns out, the $d$=2+1 quantum XY model ($N$=2) and the
$d$=2+1 Heisenberg antiferromagnet ($N$=3), are rather special, as they
represent the only cases where the spin-wave interaction in the pressure is
repulsive in the whole parameter regime where the effective expansion applies.
Remarkably, the $d$=2+1 XY model is the only system where the interaction
contribution in the staggered magnetization (susceptibility) tends to positive
(negative) values at low temperatures and weak external field.Comment: 31 pages, 12 figure