20 research outputs found
MEG Upgrade Proposal
We propose the continuation of the MEG experiment to search for the charged
lepton flavour violating decay (cLFV) \mu \to e \gamma, based on an upgrade of
the experiment, which aims for a sensitivity enhancement of one order of
magnitude compared to the final MEG result, down to the
level. The key features of this new MEG upgrade are an increased rate
capability of all detectors to enable running at the intensity frontier and
improved energy, angular and timing resolutions, for both the positron and
photon arms of the detector. On the positron-side a new low-mass, single
volume, high granularity tracker is envisaged, in combination with a new highly
segmented, fast timing counter array, to track positron from a thinner stopping
target. The photon-arm, with the largest liquid xenon (LXe) detector in the
world, totalling 900 l, will also be improved by increasing the granularity at
the incident face, by replacing the current photomultiplier tubes (PMTs) with a
larger number of smaller photosensors and optimizing the photosensor layout
also on the lateral faces. A new DAQ scheme involving the implementation of a
new combined readout board capable of integrating the diverse functions of
digitization, trigger capability and splitter functionality into one condensed
unit, is also under development. We describe here the status of the MEG
experiment, the scientific merits of the upgrade and the experimental methods
we plan to use.Comment: A. M. Baldini and T. Mori Spokespersons. Research proposal submitted
to the Paul Scherrer Institute Research Committee for Particle Physics at the
Ring Cyclotron. 131 Page
Mu2e Technical Design Report
The Mu2e experiment at Fermilab will search for charged lepton flavor
violation via the coherent conversion process mu- N --> e- N with a sensitivity
approximately four orders of magnitude better than the current world's best
limits for this process. The experiment's sensitivity offers discovery
potential over a wide array of new physics models and probes mass scales well
beyond the reach of the LHC. We describe herein the preliminary design of the
proposed Mu2e experiment. This document was created in partial fulfillment of
the requirements necessary to obtain DOE CD-2 approval.Comment: compressed file, 888 pages, 621 figures, 126 tables; full resolution
available at http://mu2e.fnal.gov; corrected typo in background summary,
Table 3.
Managing children under 36\ub0 months of age with febrile urinary tract infection: a new approach
Background- Recent guidelines on urinary tract infection
(UTI) agree on reducing the number of invasive procedures.
None of these has been validated by a long-term study. We
describe our 11-years experience in the application of a
diagnostic protocol that uses a reduced number of invasive
procedures.
Methods- We reviewed retrospectively the records of 406
children aged between 1 and 36 months at their first UTI.
All patients underwent renal ultrasound (RUS). Children
with abnormal RUS and those with UTI recurrences underwent
voiding cystourethrography (VCUG) and dimercaptosuccinic
acid (DMSA) renal scans.
Results- RUS after the first UTI was pathological in 7.4%
children; 4.4 % had a second UTI.We performed 48 VCUG:
14 patients (29%) had vesicoureteral reflux (VUR), 12 of
which showed an abnormal RUS while 2 had recurrent UTI.
After DMSA renal scan renal damage appeared in only 6 of
them (12.5%); all these children showed grade IV VUR.
Conclusions- The application of our guidelines leads to a
decrease in invasive examinations without missing any useful
diagnoses or compromising the child\u2019s health