23,231 research outputs found
Decay Constants of Pseudoscalar Mesons to Two Loops in Three-Flavor Partially Quenched PT
This paper presents a first study of the decay constants of the charged, or
flavor-off-diagonal, pseudoscalar mesons to two loops for three flavors of sea
quarks, in Partially Quenched Chiral Perturbation Theory (PQPT). Explicit
analytical expressions up to in the momentum expansion are
given. The calculations have been performed within the supersymmetric
formulation of PQPT. We also present some numerical results to indicate
the size of the corrections.Comment: 14
Leading logarithms for the nucleon mass
Within the heavy baryon chiral perturbation theory approach, we have studied
the leading logarithm behaviour of the nucleon mass up to four-loop order
exactly and we present some results up to six-loop order as well as an
all-order conjecture. The same methods allow to calculate the main logarithm
multiplying the terms with fractional powers of the quark mass. We calculate
thus the coefficients of and
, with the lowest-order pion mass. A side result
is the leading divergence for a general heavy baryon loop integral.Comment: 24p, misprints corrected, some minor reformulation
Leading chiral logarithms for the nucleon mass
We give a short introduction to the calculation of the leading chiral
logarithms, and present the results of the recent evaluation of the leading
logarithm series for the nucleon mass within the heavy baryon theory. The
presented results are the first example of leading logarithm calculation in the
nucleon ChPT. We also discuss some regularities observed in the leading
logarithmical series for nucleon mass. The talk has been presented at "Quark
Confinement and the Hadron Spectrum XI".Comment: 8 pages, 3 figure, proceeding of the XIth international conference on
Quark Confinement and the Hadron Spectrum, September 8-12 2014, St.Peterburg,
Russi
An Algorithm to Determine Peer-Reviewers
The peer-review process is the most widely accepted certification mechanism
for officially accepting the written results of researchers within the
scientific community. An essential component of peer-review is the
identification of competent referees to review a submitted manuscript. This
article presents an algorithm to automatically determine the most appropriate
reviewers for a manuscript by way of a co-authorship network data structure and
a relative-rank particle-swarm algorithm. This approach is novel in that it is
not limited to a pre-selected set of referees, is computationally efficient,
requires no human-intervention, and, in some instances, can automatically
identify conflict of interest situations. A useful application of this
algorithm would be to open commentary peer-review systems because it provides a
weighting for each referee with respects to their expertise in the domain of a
manuscript. The algorithm is validated using referee bid data from the 2005
Joint Conference on Digital Libraries.Comment: Rodriguez, M.A., Bollen, J., "An Algorithm to Determine
Peer-Reviewers", Conference on Information and Knowledge Management, in
press, ACM, LA-UR-06-2261, October 2008; ISBN:978-1-59593-991-
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