LHC EXPERIMENTSLHC EXPERIMENTSALICE,   ATLAS, CMS, LHCb, TOTEM, LHCf

Non LHC Experiments

ACE – Antiproton Cell ExperimentAntiprotons versus cancer cells

ASACUSA – Atomic Spectroscopy And Collisions Using Slow Antiprotons, Hybrid atoms straddle the antiworld

AEgIS – Antihydrogen Experiment: Gravity, Interferometry, Spectroscopy Measuring ith b f tih dg with a beam of antihydrogen

ATRAP – Antihydrogen TRAP, Peer inside atoms of antihydrogen

ALPHA – Antihydrogen Laser PHysics ApparatusNeutral trap to capture and analyse antihydrogen

Non LHC 

CAST – CERN Solar Axion Telescope, Gaze at the Sun for clues to antimatter mystery

CLOUD – Cosmics Leaving OUtdoor Droplets, Cosmic rays and cloud formation

COMPASS – COmmon Muon and Proton Apparatus for Structure and SpectroscopyP ti l b ilt f k d lParticles built from quarks and gluons

DIRAC – DImeson Relativistic Atomic Complex, Pions and the strong force

NA61/SHINE: On the origin of hadrons

NA62: Measuring rare kaon decaysNA62: Measuring rare kaon decays

CLOUD EXPERIMENT

CLOUD experiment : d l d fcosmic rays and cloud formation

CLOUD is an experiment that uses a cloudCLOUD is an experiment that uses a cloud chamber to study the possible link between galactic cosmic rays and cloud formation. 

recent CLOUD results show that trace vapors assumed until now to account for aerosol f ti i th l t h l iformation in the lower atmosphere can explain only a tiny fraction of the observed atmospheric aerosol productionaerosol production

The results also show that ionization from cosmic rays significantly enhances aerosol formation.y g y

LHC based experimentsATLAS

C

Standard Model Beyond the Standard ModelQ k Gl lALICE

CMSLHCbLHCf

Quark Gluon Plasma

TOTEM

Discovery

MeasurementMeasurement

TESTING SM and SEARCH of BSM

Extra Dimensions (ADD MODEL)‐Extra Dimensions, (ADD MODEL)‐Higgs Searches W Polarization Measurement from top pair events‐W Polarization Measurement from top pair events, ‐SUSYHeavy Ion Collision and QGP‐Heavy Ion Collision and QGP

EXTRA DIMENSIONSEXTRA DIMENSIONS

Why Extra Dimensions: Hierarchy Problem

Planck Scale: 1019 GeVScale at which the gravitational forcebecomes as strong as the other forces;g ;effects of quantum gravitation becomerelevant ...

GUT S l 1016 G VGUT Scale: 1016 GeVUnification scale where strong, weak and electromagnetic forces become equal ...

Electroweak Scale: 102 GeVScale of electroweaksymmetry breakingsymmetry breaking ...

10

Extra Dimensions: ADD Scenario

--If Large Extra Dimensions exist the 4DPlanck Scale (M ) is not a fundamental scalePlanck Scale (MP ) is not a fundamental scale-The 4+n Planck Scale (MS) is the Fundamental Scale. - To solve the Hierarchy Problem: MS ~ MEW

1/21/2The Planck scale The Planck scale MMPP ~ ~ GG--1/21/2 is not is not a fundamental scale; its a fundamental scale; its enormity is simply a consequence of the large size of the new enormity is simply a consequence of the large size of the new dimensions. While gravitons can freely propagate in the new dimensions. While gravitons can freely propagate in the new dimensions, at subdimensions, at sub--weak energies the Standard Model SM.weak energies the Standard Model SM.dimensions, at subdimensions, at sub weak energies the Standard Model SM. weak energies the Standard Model SM. Fields Fields must be localized to a 4must be localized to a 4--dimensional manifold of weak dimensional manifold of weak scale ‘‘thickness’’ in the extra dimensions.scale ‘‘thickness’’ in the extra dimensions.

11ADD‐ Physics Letters B 429 1998. 263–272

Extra Dimensions: ADD Scenario

ADD‐ Physics Letters B 429 1998. 263–272

The existence of New Spatial Dimensions is proposed. 

GeVGhcM Pl

1910~4‐Dimensions

(4+n)‐Dimensionsn MM )4(dim

(4+n)‐Dimensions SPl MM

nn RMM 22

12

SPl RMM

Extra Dimensions: ADD Scenario

nnSPl RMM 22 To solve the Hierarchy To solve the Hierarchy Problem: Problem: MMS S ~ ~ MMEWEW

n nnMMR /122 /

By setting Ms =  1 TeV

n

1 70 AU

2 1 mm

SPl MMR /

3 1 nm

4 10 pm

7 3.7 fm

5/26/2012 13

Exchange of Virtual Gravitons: Di-lepton Production: P+Pl+l+X

Signal: Two opposite sign same flavor leptonsSignal: Two opposite sign same flavor leptons

Backgrounds:Irreducible: Standard Model Drell-Yan

Other backgrounds:-Top pair (specially dileptonic), WW,WZ,ZZ-Multijet

14

j-Photon+Jet

Data, SM Prediction, and ADD Comparison

Virtual graviton exchange:Expect broad enhancement of Drell Yan productionof Drell‐Yan production

Data agrees well with the Standard Model expectations Proceed to set limits

Results: LimitsResults: Limits

[TeV]

W‐POLARIZATIONW POLARIZATION

Angular Distribution

Results of Fitting to DataResults of Fitting to Data

h dMethod FL F0 FR

3D Fitting 0.280955 ±0 011149

0.721159 ±0 013689

‐0.002115 ±0 0176550.011149 0.013689 0.017655

W‐helicity fractions are in agreement with the SM predictionsW‐helicity fractions are in agreement with the SM predictions and measured accurately with respect to previous measurements

HIGGSHIGGS

Higgs Mass Limits Before LHC 

LEP li it

The Higgs Mass Limits and Expectation:

LEP limit:

S. Schael et al. [ALEPH, DELPHI, L3, OPAL Collaborations and LEP Working Group for Higgs

Global Electroweak Fit

Boson Searches], Eur. Phys. J. C 47 (2006) 547 [arXiv:hep‐ex/0602042].

Excluded by Tevatron in 2009:

h k

23

Tevatron New Phenomena & Higgs Working Group, arXiv:0911.3930

Higgs Production at Hadron Colliders

24

Higgs Decay: Branching Ratio

25

Theoretical Cross Section

Search in three general regionsSearch in three general regionsbetween 110 – 600 GeV

26

Anatomy of an excess: local and global p-values

Maximum local significance 2.6.- significance (full mass range: 110-600GeV)= 0.6- significance (low mass range: 110-145GeV)= 1.9The excess we see in the low mass region can be definitely interpreted as a fl ct ation of the backgro nda fluctuation of the background

SUSYSUSY

SUSY EXCCLU

SIONS BBY CM

S

QUARK GLUON PLASMAQUARK GLUON PLASMA

Heavy Ion CollisionsHeavy Ion Collisions

Hadrons (confined)↓New phase of partonsdeconfined and thermalised(internal thermodynamical eq.)

Jet Quenching

The jets interact strongly withThe jets interact strongly withthe hot and dense medium ofQuark-Gluon plasma, leadingto a marked reduction of theirenergy. This energy reductionis called "jet quenching".

IPMIPM

IPM activities in 2011IPM  activities in 2011

TOP TOP Measurement of W‐Polarization in Di‐Leptonic ttbar Events in pp Collisions with sqrt(s) = 7 TeVttbar Events in pp Collisions with sqrt(s)   7 TeV

Measurement of the b‐tagging efficiency in the CMS experiment with the first LHC collisionsCMS experiment with the first LHC collisions (Jafari + VUB team)

Measurement of the Jet Energy Scale in the CMS gyexperiment with the First LHC Proton Collisions (Zeinali + VUB team)q

IPM activities in 2011IPM activities in 2011

SUSY W‐Boson Polarization based leptonic SUSY search (Safarzadeh + Imperial college group)Data Driven prediction of the ttbar background using Data‐Driven prediction of the ttbar background using b‐tagging for the RA2 Inclusive Hadronic SUSY Search (Safarzadeh + Imperial college group)S h f t i h d i fi l t t Search for supersymmetry in hadronic final states using M_T2 based on 4.4 fb‐1 of CMS data at sqrt(s) = 7 TeV (Paktinat + ETH group)S h f h i i h S Si i Search for New Physics in the Same‐Sign Di‐Lepton Channel Using 4.98 fb‐1 of 7 TeV pp Collisions (Bakhshian + ETH group)

IPM activities in 2011IPM activities in 2011

TOP Measurement of W‐Polarization in Di‐Leptonic ttbar Events in pp Collisions with sqrt(s) = 7 TeV

Measurement of the b‐tagging efficiency in the CMS gg g yexperiment with the first LHC collisions (Jafari + VUB team)

Exotic Search for Large Extra Dimensions in Dielectron Final State Search for Large Extra Dimensions in Dielectron Final State in 2011 pp Collisions at sqrt(s) = 7 TeV (Mohammadi + Etesami + Paktinat)

Higgs Higgs Search for the standard model Higgs boson decaying into tau tau; and WW in association with Z boson (A Mohammadi + Wisconsin university group)(A.Mohammadi + Wisconsin university group)

IPM activities in 2011IPM activities in 2011

tau tau Measurement of the W ‐> \tau \nu cross‐‐section in pp collisions at sqrt(s) = 7~TeV (A Mohammadi)in pp collisions at sqrt(s)   7 TeV (A.Mohammadi)

Performance of tau reconstruction algorithms with 2010 data in CMS (A.Mohammadi +with 2010 data in CMS (A.Mohammadi   Wisconsin university group)

Forward physics Forward physics Measurement of exclusive \pi+ \pi‐ and K+ K‐productions (Khakzad)p oduc o s ( a ad)

TOPTOP 

Top Quark

Top QuarkTop Quark

Top Quark Production