59 research outputs found
The continuum limit of from the lattice in the static approximation
We present an analysis of the continuum extrapolation of in the static
approximation from lattice data. The method described here aims to uncover the
systematic effects which enter in this extrapolation and has not been described
before. Our conclusions are that we see statistical evidence for scaling of
for inverse lattice spacings \gtap 2 GeV but not for \ltap 2
GeV. We observe a lack of {\em asymptotic} scaling for a variety of quantities,
including , at all energy scales considered. This can be associated
with finite lattice spacing systematics. Once these effects are taken into
account, we obtain a value of 230(35) MeV for in the continuum
where the error represents uncertainties due to both the statistics and the
continuum extrapolation. In this method there is no error due to uncertainties
in the renormalization constant connecting the lattice and continuum effective
theories.Comment: 33 pages, latex text file and postscript figures all uuencoded into a
single file, ROME preprint 94/104
Standard Model Matrix Elements for Neutral B-Meson Mixing and Associated Decay Constants
We present results of quenched lattice calculations of the matrix elements
relevant for B_d-\bar B_d and B_s-\bar B_s mixing in the Standard Model.
Results for the corresponding SU(3)-breaking ratios, which can be used to
constrain or determine |V_{td}|, are also given. The calculations are performed
at two values of the lattice spacing, corresponding to \beta = 6.0 and \beta =
6.2, with quarks described by a mean-field-improved Sheikholeslami-Wohlert
action. As a by-product, we obtain the leptonic decay constants of B and D
mesons. We also present matrix elements relevant for D^0-\bar D^0 mixing. Our
results are summarized in the Introduction.Comment: 27 pages (RevTeX), 26 figures, version published in Phys. Rev. D:
improved estimate of the systematic error associated with the uncertainty on
the strange quark mass and other small improvements to analysis (results
change only slightly); correction of typos and minor changes to text; RevTeX
formattin
The effect of analgesics on stimulus evoked pain-like behaviour in animal models for chemotherapy induced peripheral neuropathy- a meta-analysis
Contains fulltext :
213640.pdf (publisher's version ) (Open Access
Neonatal intensive care outcomes and resource utilisation of infants born <26 weeks in the former Trent region: 2001-2003 compared with 1991-1993
Objectives: to provide survival data and rates of severe disability at 2 years of corrected age in infants born prior to 26 weeks' gestation in 2001-2003 and to compare these outcomes with an earlier cohort from 1991 to 1993. Design: population-based prospective cohort study. Setting: former Trent region of UK covering a population of approximately five million and around 55 000 births per annum. Participants: the authors identified a 3-year cohort of infants born before 26 weeks' gestation between 1 January 2001 and 31 December 2003 from The Neonatal Survey (TNS). Questionnaires based on the Oxford minimum dataset were completed. Main outcome measures: survival, service use and disability levels were compared between the 2001- 2003 cohort and the cohort from 1991 to 1993. Results: in 2001-2003, 0%, 18% and 35% of live born babies were alive at 2 years without any evidence of severe disability at 23, 24 and 25 weeks' gestation, respectively. Overall, of those children admitted to neonatal care, the proportion with no evidence of severe disability at 2 years corrected age improved from 14.5% in 1991-1993 to 26.5% in 2001-2003. There was an increase in the proportion of children with at least one severe disability, out of total admissions to neonatal unit (8% vs 17%) and of those assessed at 2 years (35% vs 39%). Conclusions: this study has shown an improvement in survival to discharge in babies admitted for neonatal care. However, this improved survival has been associated with an increase in the proportion of children with at least one severe disability at a corrected age of 2 years.</p
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