String trigger , what now

1
String trigger , what now?
first look at reconstructibility of string
trigger events ....
? how do standard cuts work? ? angular
resolution ? a look at the data (atmospheric
muons for now ...) ? containment conditions ?
outlook
Remember string trigger conditions Febr. 15
June29 6/9 inner strings 7/11 outer
strings since 3270 6/9 partout ...
2
Cut efficiencies
cut efficiency after iterative likelihood fit
(zenith gt 80 degrees)
additional events from string trigger
multiplicity gt 24
string trigger events dont pass l3 cuts
3
Particular harmful ...
ratio of likelihoods for upgoing and downgoing
hypothesis or ldirc(ndirc-2)
String trigger 7/11 6/9
6/9 and 7/11
gt 24
gt24
similar for lup ldown ...
4
Likelihood ratio
Cut at likelihood ratio 10 looses almost All
additional events from string trigger
String trigger 7/11 6/9
... Cut in reduced likelihood?
gt24
lup ldown
5
Smoothness
String trigger 7/11 6/9
Need to define smoothness differently
gt24
6
resolution suffers ...
Multiplicity gt 24
String multiplicity
...similar resolution dependence on Lup-Ldown
Flat minimum
ideal use width of likelihood valley around
Minimum as parameter ...
Zenith angle resolution
7
A look at atmospheric muons ...
Compare events from multiplicity trigger with
event only seen by 6/9 7/11 string trigger
gt24
gt24
gt24
? Same features as for neutrino MC ? not only
vertical events seen by string trigger ?
would be cut by bayesian fit ...
string
string
string
5000 events, run 3228
8
Comparison 6/9 with 7/11 6/9
Look at events triggered only by string trigger
and compare to multiplicity trigger
run 3353 (6/9)
6/9
gt 24
6/9
run 3228 (7/11 6/9)
6/97/11
gt 24
6/97/11
..dont quite understand why so few vertical for
6/97/11 ...have to understand
9
Containment of tracks
?
z
Position of track endpoint (MC true values)
6/11 7/11 string triggerr
Multipliciy trigger
?
z
10
...containment
Till looking at likelihood ratio between
stopping and through-going tracks
...in progress
Should see no light (w/o scattering)
...next time ...