1 what do we want to know? measure the susy masses/parameters 4 independent variables m=10.6 gev
Post on 21-Dec-2015
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1
What do we want to know?
GeV .6140M
GeV 2.151M
GeV 260 M
GeV 830M
01
02
χ~
~
χ~
g~
0.1 h2~0
1
0)(Sgn
0 A
40tan
GeV 350 M
GeV 210M
0
1/2
0
Measure the SUSY masses/parameters
4 Independent Variables
M=10.6 GeV
5
4 Variables and 4 Unknowns
GeV .6140M
GeV 6.10MM M
GeV 260 M
GeV 830M
01
01
02
χ~
χ~~
χ~
g~
g~χ~
g~χ~
1/2
0
M17.0~M
M32.0~M
GeV 350 M
GeV 210M
01
02
1. Number of events2. Slope of the PT distribution of the
softest 3. The peak of the M distribution4. The peak of the Mj distribution
Equivalent Measurements
Make Simultaneous Measurements
Measure Parameters and Test Universality
6
Measure M and the Gluino Mass
•The slope of the PT distribution of the ’s only depends on the M
•The event rate depends on both the Gluino mass and M
•Can make a simultaneous measurementAn important
measurement without
Universality assumptions!
Results for ~300 events(10 fb-1 depending on the
Analysis)
10.6)M 830,M for (ResultsG~
Assuming the Universality
Constraints Improves the Measurement
}~15 GeV or ~2%}
~0.5 GeV or ~5%
7
Infer m0 and m1/2
M0 (GeV)
M1
/2 (
GeV
) GeV 10.6M
GeV 830M
for Results
G~
| ~3 GeV or ~2% |
| ~
7 G
eV
|or
~3%Assuming
Universality
8
Do we live in a world with Universal Couplings?
Relations Mass mSUGRA the to compare and M and M ,M,M
of tsmeasuremen ussimultaneo make to sobservable 4 all Use
g~χ~χ~ 02
01
g~χ~
g~χ~
M17.0~M
M32.0~M
01
02
| ~
5%
|
| ~10% |