2,075 research outputs found
Five-Loop Static Contribution to the Gravitational Interaction Potential of Two Point Masses
We compute the static contribution to the gravitational interaction potential
of two point masses in the velocity-independent five-loop (and 5th
post-Newtonian) approximation to the harmonic coordinates effective action in a
direct calculation. The computation is performed using effective field methods
based on Feynman diagrams in momentum-space in space
dimensions. We also reproduce the previous results including the 4th
post-Newtonian order.Comment: 15 pages, 4 figure
Alien Registration- Marquard, Saul J. (Presque Isle, Aroostook County)
https://digitalmaine.com/alien_docs/33737/thumbnail.jp
Leadership behavior impact on employee engagement
As the age of employer enlightenment continues to unfold, for the past half-century researchers have collected mounting empirical evidence linking management theory and environmental factors to worker productivity. The rise of professional research over the past several years has however signaled a change in the marketability of this research within the business community. The change is prompted by a newfound interest in workforce productivity as a source of profitability (Colan, 2009; Corporate Leadership Council, 2004; Gebauer, Lowman, & Gordon, 2008; Thomas, 2000, 2009). The study of management systems, the system of interrelationships between supervisory characteristics and organizational performance, has gained new found interest through common underpinnings innate to measures of employee engagement. The profit potential born out of workforce productivity now has business leaders seeking to understand the management and leadership practices that show a strong relationship to employee commitment. Savvy business leaders understand the new economy is dependent upon leaders nurturing the commitment and goodwill of the employee population. Employee attitudes expressed in the research as employee commitment, and more recently as employee engagement, capture the relationship between employee\u27s perceptions and how those perceptions translate into organizational performance. The ability to increase organizational performance depends upon the quality of leadership within an organization, and the literature has established solid linkages between employee engagement and organizational performance. This study seeks to identify and determine the relationship between leadership behaviors, employee engagement and organizational performance in an effort to effect positive change
The parameter at three loops and elliptic integrals
We describe the analytic calculation of the master integrals required to
compute the two-mass three-loop corrections to the parameter. In
particular, we present the calculation of the master integrals for which the
corresponding differential equations do not factorize to first order. The
homogeneous solutions to these differential equations are obtained in terms of
hypergeometric functions at rational argument. These hypergeometric functions
can further be mapped to complete elliptic integrals, and the inhomogeneous
solutions are expressed in terms of a new class of integrals of combined
iterative non-iterative nature.Comment: 14 pages Latex, 7 figures, to appear in the Proceedings of "Loops and
Legs in Quantum Field Theory - LL 2018", 29 April - 4 May 2018, Po
The Heavy Quark Form Factors at Two Loops
We compute the two-loop QCD corrections to the heavy quark form factors in
case of the vector, axial-vector, scalar and pseudo-scalar currents up to
second order in the dimensional parameter . These terms are
required in the renormalization of the higher order corrections to these form
factors.Comment: 131 pages, 3 figure
Heavy quark form factors at two loops in perturbative QCD
We present the results for heavy quark form factors at two-loop order in
perturbative QCD for different currents, namely vector, axial-vector, scalar
and pseudo-scalar currents, up to second order in the dimensional
regularization parameter. We outline the necessary computational details,
ultraviolet renormalization and corresponding universal infrared structure.Comment: 13 pages Latex, Proceedings of XLI International Conference of
Theoretical Physics "Matter to the Deepest", Podlesice, Poland, September
3-8, 2017 and RADCOR 2017, St.~Gilgen Austria, Sept 24-29, 201
Perturbative dynamics of matrix string for the membrane
Recently Sekino and Yoneya proposed a way to regularize the world volume
theory of membranes wrapped around by matrices and showed that one
obtains matrix string theory as a regularization of such a theory. We show that
this correspondence between matrix string theory and wrapped membranes can be
obtained by using the usual M(atrix) theory techniques. Using this
correspondence, we construct the super-Poincare generators of matrix string
theory at the leading order in the perturbation theory. It is shown that these
generators satisfy 10 dimensional super-Poincar\'e algebra without any anomaly.Comment: 23 pages, 1 figur
Prospective Analysis Spin- and CP-sensitive Variables in H -> ZZ -> l_1 l_1 l_2 l_2 with Atlas
A possibility to prove spin and CP-eigenvalue of a Standard Model (SM) Higgs
boson is presented. We exploit angular correlations in the subsequent decay H
-> ZZ -> 4l (muons or electrons) for Higgs masses above 200 GeV. We compare the
angular distributions of the leptons originating from the SM Higgs with those
resulting from decays of hypothetical particles with differing quantum numbers.
We restrict our analysis to the use of the Atlas-detector which is one of two
multi-purpose detectors at the upcoming 14 TeV proton-proton-collider (LHC) at
CERN. By applying a fast simulation of the Atlas detector it can be shown that
these correlations will be measured sufficiently well that consistency with the
spin-CP hypothesis 0+ of the Standard Model can be verified and the 0- and 1+-
can be ruled out with an integrated luminosity of 100 fb^-1.Comment: 25 pages, 9 figures Version 2: Minor changes made as requested by
Atlas referee and Springer editor. Added a chapter where background
subtraction is detaile
Testing binary dynamics in gravity at the sixth post-Newtonian level
We calculate the motion of binary mass systems in gravity up to the sixth
post--Newtonian order to the terms ab initio using momentum expansions
within an effective field theory approach based on Feynman amplitudes in
harmonic coordinates. For these contributions we construct a canonical
transformation to isotropic and to EOB coordinates at 5PN and agree with the
results in the literature \cite{Bern:2019nnu,Damour:2019lcq}. At 6PN we compare
to the Hamiltonians in isotropic coordinates either given in
\cite{Bern:2019nnu} or resulting from the scattering angle. We find a canonical
transformation from our Hamiltonian in harmonic coordinates to
\cite{Bern:2019nnu}, but not to \cite{Damour:2019lcq}. This implies that we
also agree on all observables with \cite{Bern:2019nnu} to the sixth
post--Newtonian order to .Comment: 13 pages Late
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