Mu2e general presentation
description
Transcript of Mu2e general presentation
![Page 1: Mu2e general presentation](https://reader036.fdocuments.in/reader036/viewer/2022062322/56814385550346895db002de/html5/thumbnails/1.jpg)
Giovanni OnoratoFermilab
University of Rome “Guglielmo Marconi”INFN Lecce
Mu2e general presentation
![Page 2: Mu2e general presentation](https://reader036.fdocuments.in/reader036/viewer/2022062322/56814385550346895db002de/html5/thumbnails/2.jpg)
2 / 156 / 28 / 2011
Particle physics frontiers
-Neutrino experiments (NOvA, LBNE, MINOS, MINERvA, and others… )-Precision measurements (g-2)-Rare decays (Mu2e)
Mu2e collaboration
![Page 3: Mu2e general presentation](https://reader036.fdocuments.in/reader036/viewer/2022062322/56814385550346895db002de/html5/thumbnails/3.jpg)
3 / 156 / 28 / 2011
The lepton flavor violation
Neutrinos have mass, so in the SM we can have
Rate < 10-54
(unmeasurably low)
In new physics models one can have
or in presence of a nucleus…
Experiments:Mu2e, SINDRUM II, TRIUMF, COMMET, and others…
Rate ~ 10-
15
![Page 4: Mu2e general presentation](https://reader036.fdocuments.in/reader036/viewer/2022062322/56814385550346895db002de/html5/thumbnails/4.jpg)
4 / 156 / 28 / 2011
Present measurements
![Page 5: Mu2e general presentation](https://reader036.fdocuments.in/reader036/viewer/2022062322/56814385550346895db002de/html5/thumbnails/5.jpg)
5 / 156 / 28 / 2011
Mu2e achievements
![Page 6: Mu2e general presentation](https://reader036.fdocuments.in/reader036/viewer/2022062322/56814385550346895db002de/html5/thumbnails/6.jpg)
6 / 156 / 28 / 2011
Experimental setup 1
•Proton beam hits production target in Production Solenoid.•Pions captured and accelerated towards Transport Solenoid by graded field.•Pions decay to muons.
![Page 7: Mu2e general presentation](https://reader036.fdocuments.in/reader036/viewer/2022062322/56814385550346895db002de/html5/thumbnails/7.jpg)
7 / 156 / 28 / 2011
Experimental setup II
•Transport solenoid performs sign and momentum selection.•Eliminates high energy negative particles, positive particles and line-of-sight neutrals.
•Muons captured in stopping target.•Conversion electron trajectory measured in tracker, validated in calorimeter.•Cosmic Ray Veto surrounds Detector Solenoid.
![Page 8: Mu2e general presentation](https://reader036.fdocuments.in/reader036/viewer/2022062322/56814385550346895db002de/html5/thumbnails/8.jpg)
8 / 156 / 28 / 2011
Dominant background
![Page 9: Mu2e general presentation](https://reader036.fdocuments.in/reader036/viewer/2022062322/56814385550346895db002de/html5/thumbnails/9.jpg)
9 / 156 / 28 / 2011
Other background sources
-Radiative muon/pion capture-Photon produced that can convert asymmetrically-Beam electrons can scatter in target-Muon/pion decay in flight-Antiprotons and other late arriving particles-Cosmic-ray induced electrons-Protons - Neutrons - Photons from Nuclear capture
None of them produce a sharp peak at 105 MeV:they need to be well known and controlled.
Work is going on on this
![Page 10: Mu2e general presentation](https://reader036.fdocuments.in/reader036/viewer/2022062322/56814385550346895db002de/html5/thumbnails/10.jpg)
10
/ 156 / 28 / 2011
Detectors: the T-Tracker
18 stations + Stiffening rings at ends12 panels, at 30° rotations, form a station30° stereo angles give 400m resolution along wireStraw termination and readout at r>70cm
![Page 11: Mu2e general presentation](https://reader036.fdocuments.in/reader036/viewer/2022062322/56814385550346895db002de/html5/thumbnails/11.jpg)
11
/ 156 / 28 / 2011
T-Tracker: straws structure
5mm strawsGaps between strawsDouble layer
![Page 12: Mu2e general presentation](https://reader036.fdocuments.in/reader036/viewer/2022062322/56814385550346895db002de/html5/thumbnails/12.jpg)
12
/ 156 / 28 / 2011
Alt. ITracker (from INFN Lecce)
![Page 13: Mu2e general presentation](https://reader036.fdocuments.in/reader036/viewer/2022062322/56814385550346895db002de/html5/thumbnails/13.jpg)
13
/ 156 / 28 / 2011
The calorimeter (from INFN Frascati/Pisa)
![Page 14: Mu2e general presentation](https://reader036.fdocuments.in/reader036/viewer/2022062322/56814385550346895db002de/html5/thumbnails/14.jpg)
14
/ 156 / 28 / 2011
Location
![Page 15: Mu2e general presentation](https://reader036.fdocuments.in/reader036/viewer/2022062322/56814385550346895db002de/html5/thumbnails/15.jpg)
15
/ 156 / 28 / 2011
Time schedule