Tariq Mahmoud 04101968 - Tammoun/Palestine - IIHE
Tariq Mahmoud 04101968 - Tammoun/Palestine - IIHE
Tariq Mahmoud 04101968 - Tammoun/Palestine - IIHE
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<strong>Tariq</strong> <strong>Mahmoud</strong><strong>04101968</strong> - <strong>Tammoun</strong>/<strong>Palestine</strong>1975-1987 1987 Schooling in <strong>Palestine</strong>1991 Germany1993 Physics in Mainz2000 PhD in Heidelberg2005 PostDoc in Brussels
Physikalisches Institut:Physikalisches Institut:The ALICETransition Radiation Detector (TRD)PhD of <strong>Tariq</strong> <strong>Mahmoud</strong>Physikalisches InstitutUniversität Heidelberg
The ALICE Transition RadiationDetectorEinfluss der DrahtspannungEinfluss durch ÜberdruckGesamtwölbung: 900 µmoptimize Der Radiator chamber wird um parameters5.2 µm/kgnach außen gewölbt.build a prototype and test it on itsmechanical and electrostatic stabilityt st it in b m n its PID c p bilitDer Radiator wird um 400 µm/mbarnach außen gewölbt.
The ALICE Transition RadiationDetectorExtrapolated to highmomentumoptimize chamber parametersbuild a prototype and test iton its mechanical andelectrostatic stabilitytest it in a beam on its PIDcapabilityare we able to access theQuarkonia in the ACB?how significant is our signal?can we resolve the individualoptimize chamber parametersbuild a prototype and test it on itsmechanicalQuarkoniaand electrostatic stabilitytest it in a beam on its PID capabilityare we able to access the Quarkoniain the ACB?how significant is our signal?states?can we resolve the individual states?PHD
<strong>IIHE</strong> (ULB & VUB)<strong>IIHE</strong> (ULB & VUB)Elementary Particle Physics in theCMS Collaboration<strong>Tariq</strong> <strong>Mahmoud</strong>ULB
Extra DimensionsSolve the hierarchy problem by space-time geometrymodificationExperimental signatures- 1/r2 law deviations at small distances- Direct/indirect observation of KK particles2 classes of models:- Large scale ED (ADD) & - Randall-SundrumHIER: variation of the ADD model, ED scale R c ~Tev -1• At least 2 large ED where gravity propagates• 1 small ED with R c =1/M c ~Tev -1 where gauge bosons propagateAppearance of Kaluza-Klein towers of states for gaugeboson fields: γ (n) , Z (n) (W (n) ,g (n) )
TeV-electrons (photons)nice signal ;-)butM c (TeV)4.04.55.05.56.0M cut (TeV)3.53.54.54.55.0S(100)47.428.414.38.44.6S(20)21.212.76.43.82.1S(1)4.742.841.420.840.46energy correction(s)andelectronics saturation
Energy CorrectionE rec /E gen
Electronics Saturationsaturation of thehottest cell S1SleftS ups1SrightS downY=Log[S right /S left ],X=Log[S up /S down ]f=a 0 +a 1 x 2 +a 2 y 2 * a 3 exp(a 4 x 2 +a 5 y 2 )
Saturation of thehottest cellElectronics Saturationmission possible
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