Is it an omen?
Last night we got heavy snowstroms in the north-eastern part of Denmark… unfortunately including the airport in Copenhagen…
Which implicated that my Supervisor couldn’t get the flight he intended to :-(
We’ll see if he gets here until tomorrow…
I seem to have a problem with snow this winter… hmm
[update]
after some (or maybe a lot) delay, Heike, my sister and father and Troels are finally here
damn… well that’s a start!
I am sitting at the airport in Copenhagen waiting for the flight that was scheduled 45min ago…
and even better… now its scheduled for 13h50…
yap, right… four hours late
13h50… that’s also roughly the time when my connection coach is about to leave Stansted…
I am really enjoying my holidays so far…
[update]
well, now it has been cancelled!
the best alternative they could offer was Sunday morning…
honestly that’s what they offered looking at my ticket with return flight on Monday morning…
I AM PISSED! and not going to Oxford btw!
[update][update]
I wont get back the money for the coach I booked in advance…
Well what should I say… I started enjoying my sparetime with some going out and watching movies.
Until yesterday, covering movies like “The Departed” and “Blood Diamond” this was actually quite relaxing… but then my good old friend Pedro convinced me to watch “Hostel“…
With Quentin Tarantino being the producer, you sort of know that you’ll get sth “special”… but this is more than special, its just sick… but not a bad movie though… but sick.
Now, not having to fear a crash of my system, I finally managed to switch to Kubuntu 6.10 (Edgy)… first spar-time-mission accomplished
IT’S DONE!
“Electron Identification with the TRT
and the
W Boson Mass Measurement at ATLAS”
Thesis submitted for the degree of Candidatus Scientiarum in Physics by Sascha Mehlhase
Abstract
This thesis covers two physics analyses for the ATLAS experiment at CERN.
The first one, describing the mapping and optimisation of the electron identification in the TRT subdetector system, introduces new methods utilising the, so far unused, dE/dx information, carried in the time-over-threshold variable, as well as possible ways of combining this with the current algorithms. Based only on real data, its results will also be of use as input for a tuning of the Monte Carlo simulation of the system. Introducing a probability based approach for particle identification the overall pion rejection factor reaches value from 25 to 70. Especially at low energies an improvement, compared to the current method, of up to 300% is reached.
In the second analysis the systematic error in the W boson mass measurement, due to the theoretical description of real photons emitted by the final states in leptonic decays, is characterised. By observing the effect on parameters used for the mass measurement for successive theory improvements (orders in QED), the overall systematic error has been estimated to be about 8 MeV (5 MeV) for electrons (muons).
