My Work at Fermilab
Particle Identification in the ECal, defining a
"Dynamic" shower Maximum
and the Electron to Pion separation using the
information of both ECal and HCal.
The data are samples of 5000 single particles
between 2 and 50 GeV/c .
Distribution of the
Moment of Inertia of the Energy Deposited in the Detector and
Particles ID.(pdf)
Muon ID Was
studied on single muons on samples of 5000 events at various
momenta between
2 and 50 GeV/c as well as the separation from pions
and
the punchthrough with the SD detector. It was compared to the results
obtained with the Tesla detector and
presented at
Performance
Studies of the SiD Muon Detector.(pdf)
LC Muon Metting-February 7-03-Momentum dependant cuts were
introduced and the Multiple Scattering and the dE/dx were
studied.
Muon ID Algorithm
Development & Multi-Scattering.(pdf)
The Muon Detection study within
jets has been performed on 10000 B-Bbar .
which was presented at the Cornell Workshop-July
2003.
Muon
Identification in B-B_bar Events.(pdf)
LC Muon Meeting-
September 26-03-Resolving hadrons Ambiguities using
the Hadron
Calorimeter.
ProgressReport-inB-B_barEvents.(pdf)
LC Muon Meeting- October 03-Differentiating Hadrons and Muons with
the Hadron Calorimeter.
MoreProgressReport-inB-B_barEvents.(pdf)
Including dE/dx in retracing the
charged track to collect the hits in the material
of the Calorimeters both
Electro-Magnetic and Hadronic and in the Muon Detector –
February11-04.
TheChargedParticlesStepper-(pdf)
I was
Collaborating in the preparation of a very rare kaon decay experiment Charged
Kaon at the Main Injector - Nucl.Phys. B-vol93-(Proc. Suppl)March 2001. Los Alamos (preprint
ex/0009046-) NuclPhysB93.ps.gz In the same
experiment using the same beam and detector one can also study Kaon Radiative Decay K+
==> Mu+ nu gamma at CKM at the Fermilab Main
Injector In a rare decay
experiments a major task is not the measurement of the channel The Vacuum Veto
system is described in section 3.2 of the Nuclear Physics paper link.
- Nucl.Phys.B-vol93-(Proc.
Suppl)March
2001-NuclPhysB93.ps.gz In the figure linked
below I have represented the required inefficiencies in the Inefficiencies in
the Vacuum Veto System with those obtained in E787 with the same sampling
Below are linked a
presentation given at a collaboration meeting as well as the CKM notes
with our detailed study of the simulated inefficiencies Study of the Vacuum Veto
System - Note CKM_20.ps.gz A similar study has then
been done for the Forward Veto System. Study of the Forward Veto
System for CKM - Note CKM_23.ps.gz And both are considered
in the note A Photon Veto System for CKM Study of a Photon Veto
System for CKM - Note CKM_25.ps.gz In relation to the veto
system, I have been involved in actual tests Plastic Scintillator
for the CKM Veto System-RND - Note CKM_55.ps.gz Study of the light
yield from plastic scintillator with green extended
fibers Study of light
yield improvment with fiber gluing or smoothness
quality of the fiber groove Another important
component in such an experiment is the beam which has Study of the Muon
Background in the CKM Beam at the Fermilab Main Injector Geant Simulation of the
RF Separated K+ Beam for the CKM Experiment In the CKM Detector Geant
I wrote the code and the digitisation for : Using Geant I have
confirmed that interactions and charge exchange in the
BIVS -Geant simulated
interactions I have also taken care of
the K+ beam generation in CKMGEANT, using the Beam Phase-Space: for
Detector-geant For more sensitive
studies, the actual Beam-Geant output Rates in the Veto
System - Note CKM_54.ps Finally ,to
summarize, as for August 2001, one month before my
Improvment in Muon Detection in Jets
with the Stepper & a New Algorithm in HDCAL To Filter Out Hadrons .
Presented At The Victoria Workshop-28-31July-04–
.
e+ e- --> stop stop_bar--> c Neutralino c_bar neutralino at the linear collider
.
LCFI meeting-9 May 05
2004.
Previous Work I made for OPAL which
could benefit the LinearCollider.
The Higgs in
the 2 photon channel-
Detection of The
Particles Produced in gamma-gamma
Collisions with OPAL at
LEP.(pdf)
Techniques of Measurement of the
Tau Polarization in the Tau
-> a1-
Measurement of the
polarization of the Tau in the a1 Decay
Channel
Using the
Information From the Decay Angle Distribution.( ps)
Charged Kaon at the Main Injector
CKM at Fermilab.
In conjonction with the
corresponding Neutral Kaon channel and the B sector,
this experiment will
contribute to measure if the assymmetry between matter
and anti-matter is totally accounted for by the standard model, or
partially,
or not at all.
Talk given at the 4th International Conference
on Hyperon Charm & Beauty-
June 2000.
This
is described in some detail in the presentation linked below, the 1st paper
of CKM(and its 2nd preprint and note CKM_36)
NuclPhysB93.pdf
other
interesting Physics Channels.
I have also been involved in the study
of another physics channel of charged kaon,
decay produced with higher statistics .
Talk given at the Workshop:Fixed Target Physics at the Main Injector-May 1997,
where the channel simulated for CKM was compared to the data in E761.
This was the object of the 1st CKM preprint linked below.
-
Note CKM_35.pdf
of
interest but first of all the veto of backgrounds much more abondant than the
signal itself.
I have worked
extensively in the simulations of the veto system and the studies
of
the inefficiencies related using Geant the simulator developped at Cern.
NuclPhysB93.pdf
Vacuum Veto
System together with the data obtained in the experiment E787
carried out at
Brookhaven which had the same sampling propertiesthan
our detector,
together with the Geant simulated results for the energies out
of the range covered by E787.
shown in the figure
above for the Vacuum Veto System.
Note CKM_20.pdf
Note CKM_23.pdf
(the pdf
version is not avalaible)
Note
CKM_25.pdf
of the properties of plastic
scintillators, fibers and photomultipliers
which would be used for the
construction of the actual devices and
their light yield.
Note
CKM_55.pdf
Study using green
extented Photo-Multipliers
Tubes - Note CKM_51.ps.gz
Note
CKM_51.pdf
- Note
CKM_52.ps.gz
Note
CKM_52.pdf
to be intense in order
to produce the very rare channel in sufficient amount
in a reasonnable time, and on the other hand it should be pure
enough not to
introduce additional backgrounds. I have also collaborated in
the simulation
of the superconducting RF beam using Geant. In the Beam-Geant
simulations
written by Rick Coleman, I contribute some flexibility face to
constant setup
changes. A shielding was added on a first attempt to
evaluate the muon
background. In a tentative of a 6-digits phase-space
comparison Geant-Turtle
I have included the Double-Precision tracking developped by Paul Lebrun for
the Muon Collider and modified the user's routines accordingly. I have also
imbedded the Poisson Mapping into Geant for the Iron of the dipoles
and the
magnets.
- Note CKM_13.ps.gz
Note CKM_13.pdf
- Note CKM_29.ps.gz
Note
CKM_29.pdf
The Vacuum Veto System,
The Beam Veto System
which discards the beam which has
interacted before reaching
The Kaom
Decay volume,
The Hole Veto System
which complements the Forward Veto System .
CKMGEANT Development- "10
easy Bugs" and simple ways to avoid them
material prior to BIVS are manageables, results
first obtained by Jack Ritchie
with his fast Monte-Carlo.
In order
to do so, I have assumed that the UMS had a silicon plane 10cm in radius
and 0.03cm thick. BIVS had a beam hole 10cm in
radius and was made of a lead tube,
5 meters long
and extending from r=10cm to r=50cm .
The results obtained by
Geant-Gheisha in a run of 10Millions events are shown
below.
A smaller statistic run done with Geant-Flucka give similar limits.
phase-space
distributions extracted from the output of Beam-Geant.
The
correlations (y, theta_y) for the main
beam component as well as for the
pion component and the proton component of
the beam as can be seen in the
(y,thets_y)
figures, see link below.
in format pdf
has been used as input of the Detector
Geant, this has been
the case in the rate studies linked below.
Note
CKM_54.pdf
guest scientist
appointment ended, I have made significative
contributions in works from Physics to plastic scintillators studies
through simulations in the veto system and beam. They have been
summarized in 11/55 ckm notes, 2 preprints and one
paper of E921,
a collaboration of ~40 physicists
