SUSY searches at the LHC * and Dark Matter
|
|
- Flora Shelton
- 5 years ago
- Views:
Transcription
1 SUSY searches at the LHC * and Dark Matter Elisabetta Barberio ATL-PHYS-SLIDE February 2009 School of Physics The University of Melbourne/Australia Dark 2009: Seventh International Heidelberg Conference on Dark Matter in Astro and Particle Physics * ATLAS
2 Evidence of Dark Matter So far only from astronomical observations DARK MATTER Is it a fundamental particle? What are its properties? How does it interact? What is the symmetry origin of the dark matter particle? Is dark matter composed of one particle species or many? How and when was it produced? 1
3 Experiments looking for Dark Matter Astrophysical experiments direct detection χ χ indirect detection - land-based - high altitude - space-based χ _ p e + γ ν χ Collider experiments (LHC) Measurements at LHC are complementary to direct and indirect astro searches / measurements 2
4 Complementarity σ χp si (cm 2 ) EDELWEISS DAMA ZEPLIN-I CRESST-II ZEPLIN-2 EDELWEISS 2 XENON CDMS CDMS-II σ χp si ZEPLIN-4 GENIUS No. MC Experiments Polesello et al JHEP 0405 (2004) 071 σ χp si Ω χ h 2 ZEPLIN-MAX m χ log 10 (σ χp si / 1pb) Ω χ h 2 Dark Matter particle mass m χ (GeV) If the LHC discovers e.g. SUSY we can study the compatibility of e.g. SUSY signal with Dark Matter hypothesis Use SUSY model parameters and ATLAS measurements to predict Dark Matter parameters Ω χ h 2, m χ, σ χp si etc. and compare with astro measurements
5 What we know about DM? Neutral Cold Stable Not Baryonic Weakly interacting ρ χ 0.3GeV/cm 3 V 220 km/s Nature of DM particle? Observational constraints are no match for the creativity of theorists Many hypothesis, but not all are equally motivated WIMPs and SuperWIMPS can be produced by colliders 4
6 Why WIMP? Naturally predicted in many new physics models Supersymmetry, Extra-dimension, Little Higgs Naturally give the correct Dark Matter relic density The amount of dark matter remaining is inversely proportional to the annihilation cross section: / Ω DM <σ A v>
7 Supersymmetry Supersymmetry (SUSY) fundamental continuous symmetry connecting fermions and bosons SUSY stabilises Higgs mass against loop corrections (gauge hierarchy /fine-tuning problem) Leads to Higgs mass 135 GeV
8 Supersymmetry In principle the SUSY partners to have same masses as SM states Not observed! SUSY must be a broken symmetry at low energy h u c t γ g G A d s b Z H 0 e µ τ W ± H ± ν e ν µ ν τ Minimal Supersymmetric Standard Model (MSSM) Hχ 0 1 u u d c χh d t b τ γ Z χ ± 1 g G e s µ χ ± W ± 2 χ 0 H 3 + u ν e ν µ ν τ χ 0 H4 d
9 In constructing SUSY models, a symmetry called R-parity can be imposed under which SM particles are even, SUSY particles are odd consequences: SUSY Dark Matter sparticles are produced in pairs at the LHC the lightest sparticle (LSP) is absolutely stable LSP neutral/weakly interacting naturally provides a solution to Dark Matter problem Which particle is the LSP depends on the point in parameter space, e.g. LSP neutralino (WIMP) gravitino (SuperWIMP) R-Parity violating models not covered here. 8
10 focus-point region above 7 TeV for m t = 178 GeV bulk' region: t- channel slepton exchange. 'Bread and Butter for LHC. Neutralino (WIMP) Dark Matter Within msugra parameter space, only a few regions are compatible with WMAP constraint Favoured by g µ 2 disfavoured by BR (b sγ) χ 0 1 χ 0 1 l R l l msugra A 0 =0, tan(β) = 10, µ>0 + funnel region at large tanβ χ 0 1 τ 1 τ τ 1 γ/z/h Charged LSP co-annihilation region. Small slepton-lsp mass difference. Measurements difficult Ω χ h (Ellis et al., Phys. B565 (2003) )
11 LARGE HADRON COLLIDER protons protons (or Pb ions) Starts this year! E COM = 14 TeV Design Luminosity cm -2 s -1 Bunch crossing rate 40 MHz Events per bunch crossing 20 4 main experiments CMS, ATLAS (multi purpose) ALICE (heavy ion physics) LHCB (low-p T B physics)
12 Dark matter production at LHC Hard Scattering χ χ χ model-dependent study Underlying Event 11
13 ATLAS Length : 46 m Radius : 12 m Weight : 7000 tons 10 8 electronic channels 3000 km of cables Inner Detector (B=2T) : - Si pixels and strips - Transition Radiation Detector Calorimetry: - EM : Pb-LAr - HAD: Fe/scintillator (centr.), Cu/W-LAr (fwd) Muon Spectrometer: air-core toroids with muon chambers 12
14 First beams, 10 September x10 9 protons at 450 GeV 13
15 Variables at a hadron collider Transverse momentum p T and Energy: p T = p sin θ Component of momentum of particles in the plane perpendicular to the beam axis non-interacting particles (WIMP, neutrinos) do not leave signature in a detector they are detected by using energy and momentum conservation: sum up the momenta of everything measured, what is left to get back to zero (missing energy) is the neutrino(s)/wimp energy. In a proton-proton collision, only the transverse missing energy (E T miss ) is measured since the energy along the beam-pipe direction is undetected
16 Sparticles production at the LHC Squarks and gluinos produced via strong processes large cross-section e.g. for m(q, g) 1 TeV 100 events produced with 100 pb -1 Charginos, neutralinos, sleptons direct production occurs via electroweak processes much smaller rate (produced more abundantly in squark and gluino decays), e.g. 15
17 What the LHC actually sees e.g., q q pair production: q are heavy (Tevatron limits: m > GeV) cascade decays favoured each q neutralino χ which escapes detection apparent missing energy in the final state Spectacular events with many jets, missing transverse energy, leptons relatively easy to extract SUSY signal from SM backgrounds at LHC (in most cases ) 16
18 Background processes Very difficult to observe light objects (e.g.w, Z,..) in final states with only jets rely on lepton, γ Mass resolutions of 1% (10%) needed for lepton, γ (jets) to extract tiny signals from backgrounds, and excellent particle identification 17
19 SUSY Dark Matter strategy 1 st Step Look for deviations from the Standard Model Example: multi-jet + E T miss signature 2 nd Step: Is it SUSY? If so establish the SUSY mass scale using inclusive variables, e.g. effective mass distribution Relevance to Dark Matter Inclusive studies: Verify if the discovered signal provides a possible Dark Matter candidate Exclusive studies: Model-independent calculation of LSP mass, compare with direct searches 3 rd Step: Which SUSY flavour? Determine model parameters (difficult) Strategy: select particular decay chains and use kinematics to determine mass combination Relevance to Dark Matter model-dependent calculation of relic density, σ(χp si ), etc
20 SUSY Signatures p p q g χ 0 2 l χ 0 1 q q l l Strongly interacting sparticles (squarks, gluinos) dominate production. Heavier than sleptons, gauginos etc.: cascade decays to LSP. Long decay chains and large mass differences between SUSY states Many high p T objects observed (leptons, jets, b-jets). If R-Parity is conserved LSP Large E T miss signature
21 Search for 0,1,2 leptons plus jets Inclusive searches With leptons, smaller signal rates, but better S:B conditions More robust discovery potential, specially at the beginning, when uncertainties on the backgrounds are large 0-lepton 1-lepton bulk region 5σ ATLAS
22 Background Estimate Standard Model background using data-driven techniques e.g.. Studying Z νν + n jets, W lν + n jets, W τν + (n-1) jets Select Z ll e.g. Z l + l - + n jets (e or µ) can be use to validate MC / estimate E T miss replace charged leptons by neutrinos
23 LHC SUSY discovery reach Multi-jet+missing energy signatures with 1 fb -1 : sensitive to m(g)< TeV Current limit> GeV
24 Is it SUSY? Need to demonstrate we have SUSY, not another model: e.g. spin measurements One possibility use two-body slepton decay chain charge asymmetry of lq pairs measures spin of χ 0 2 shape of dilepton invariant mass spectrum measures slepton spin Spin-0 Measure Angle Point 5 Spin-½ m lq spin-0=flat Polarise Spin-½, mostly wino Spin-0 Spin-½, mostly bino 150 fb -1 ATLAS
25 Which SUSY? Symmetry Breaking mechanism determines phenomenology at colliders Constrained models: msugra/cmssm: Neutralino is the LSP Many different final states Common scalar and gaugino masses GMSB: AMBS: Gravitino is the LSP Photon or tau final states expected If R-Parity is conserved R-Parity Violated LHC experiments sensitive only to LSP lifetimes < 1 ms ATLAS Physics TDR R-Parity Conserved
26 Which SUSY? SUSY spectroscopy.measure weak scale SUSY parameters through exclusive decay measurements Search for kinematic endpoints in the invariant mass distributions of visible decay products Solve edge equations to reconstruct sparticle masses edge of kinematic endpoint Use the mass spectrum to reconstruct SUSY parameters assuming a particular breaking framework Weiglein et al. (2004)
27 Dilepton edge measurements χ 0 2 l l l χ 0 1 kinema(c endpoint: When kinematically accessible χ 0 2 can undergo sequential two-body decay to χ 0 1 via a right-slepton edge of kinematic endpoint Results in sharp dilepton invariant mass edge sensitive to combination of masses of sparticles. Position of edge measured with precision 0.5% (30 fb -1 ) 1 fb -1 di lepton mass (GeV) 26
28 Coannihilation signatures Small slepton-neutralino mass difference gives soft leptons Decays of χ 0 2 to both l L and l R kinematically allowed. Double dilepton invariant mass edge structure; edges expected at 57 / 101 GeV Stau channels enhanced (tanβ) edge expected at 79 GeV; less clear due to poor tau visible energy resolution. Point chosen within region: m 0 =70 GeV; m 1/2 =350 GeV; A 0 =0; tanß=10 ; µ>0; 27
29 Bulk Signatures Dilepton edge starting point for reconstruction of decay chain. Make invariant mass combinations of leptons and jets. Gives multiple constraints on combinations of invariant masses. q L χ 0 2 q χ fb -1 l l l llq edge llq threshold lq edge Point chosen within region: m 0 =100 GeV; m 1/2 =300 GeV; A 0 =-300; tanß=6 ; µ>0;
30 Heavy Gaugino Measurements - Crucial input for the reconstruction of MSSM neutralino mass matrix independent of the SUSY breaking scenario ATLAS - Potentially possible to identify dilepton edges from decays of heavy gauginos. Requires high stats. SPS1a ATLAS 100 fb -1 ATLAS 100 fb -1 ATLAS 100 fb -1 SPS1a
31 Measuring Model Parameters e.g. msugra/cmssm model and perform global fit of model parameters to observables ex: msugra 2 edge ( m ll ) m 0, m 1/2, A 0, meas tanβ, sgn(µ) 2 edge ( m ll ) pred. Fit: χ 2 Point m 0 m 1/2 A 0 tan(β) sign(µ) Bulk 100 Gev 300 GeV m χ 2 0, m l R ±, m χ1 0 sign(µ)=+1 expected unc. 1 fb -1 m GeV ± 9.3 GeV m 1/ GeV ± 6.9 GeV tan(β) A GeV ± 408 GeV
32 CP violation So far considered CP conserving MSSM: What if CP is violated? Need new sources of CP violation beyond the SM for baryogenesis In the general MSSM, gaugino and higgsino mass parameters and trilinear couplings can be complex: Important influence on sparticle production and decay rates Expect similar influence on <σν> NB1: M 2 can also be complex, but its phase can be rotated away. NB2: CPV phases are strongly constrained by dipole moments; we set φ m =0 and assume very heavy 1st+2nd generation sfermions 31
33 Electroweak Baryogenesis LHS-3 M A = 1000 GeV arg(µ) = π/2 LHS-1 Representative benchmarks LHS-1: strong light stop-neutralino coannihilation to produce correct relic density; small mass difference makes it hard to find at the LHC LHS-2 LHS-2: resonant annihilation of neutralinos via Higgs resonances lowers the neutralino abundance; the most promising benchmark for discovery at the LHC C. Balázs et al., Les Houches 2005 LHS-3: lightest neutralino coannihilates with lightest stop and chargino to lower abundance and produce correct relic density; could be studied at the LHC
34 Final state is very similar to top pair production events. As before, after the discovery: Light Stop χ 0 q hadronic leg _ χ b ν _ e,µ q t 1. Reconstruct the kinematic endpoints in the invariant mass distributions of visible decay products 2. Solve the edge equations to reconstruct sparticle masses 3. Find the model parameters T. Lari and G. Polesello hep-ph/ t b leptonic leg χ + Mass Spectrum t 1 χ 0 1 χ + 1 LHS-2 χ GeV 89 GeV 129 GeV M(bjj) 1.8 fb -1 M(bl) 1.8 fb -1 GeV GeV
35 Dark Matter Parameters Can use parameter measurements m 0, m 1/2, A 0, tanβ, sgn(µ) derived from the previous fit to estimate the LSP dark matter properties Calculate rate for all possible neutralino annihilation processes a) slepton exchange, slepton masses < 200 GeV b) annihilation to vector bosons (LSP has a wino or higgsino component) c) coannihilation with light sleptons d) annihilation to third-generation fermions. Need of all the masses and couplings of sparticles contributing to neutralino
36 Ultimate LHC precision msugra bulk region, 300 fb -1 Polesello, Tovey JHEP 0405 (2004) 071 best-case scenario (old fast simulation) Micromegas 1.1 (Belanger et al.) + ISASUGRA 7.69 Ω χ h fb -1 ATLAS DarkSUSY (Gondolo et al.) + ISASUGRA 7.69 σ χp 300 fb -1 ATLAS Ω χ h 2 = ± log 10 (σ χp /pb) = ± 0.04 This study aggressively targets those (weak scale) parameters needed for relic density calculation
37 Dark Matter in the MSSM To obtain a more model-independent relic density estimate is much harder: much more measurements are needed measure relevant (co-)annihilation channels and exclude all irrelevant ones also Stau, higgs, stop masses/mixings are important as well as gaugino/higgsino parameters Nojiri, Polesello & Tovey, JHEP 0603 (2006) 063 Ω χ h fb -1 Ω χ h2 300 fb -1 σ(ω χ h 2 ) vs σ(m ττ ) SPA point σ(m ττ )=5 GeV σ(m ττ )=0.5 GeV
38 Outlook 37
39 Collider + Astrophysical expts: Baer,Tata (2008) Baer, et al (2004) 38
40 Collider + Astrophysical expts: LCC1 Battaglia (2005) 39
41 Summary The LHC and direct astro-particle experiments are complementary Following a SUSY discovery, the LHC experiments will aim to test the SUSY Dark Matter hypothesis. Conclusive result only possible in conjunction with astroparticle experiments Ultimate goal: observation of neutralinos at LHC confirmed by observation of e.g. signal in Dark Matter experiment (in-direct and direct detection) as predicted mass and cross-section. LHC begins in 08-09, direct and indirect detection are improving rapidly this field will be transformed soon
Dark Matter Experiments and Searches
Dark Matter Experiments and Searches R.J.Cashmore Principal Brasenose College,Oxford and Dept of Physics,Oxford R.Cashmore Dark Matter 3 1 Dark Matter at LHC R.Cashmore Dark Matter 3 2 Satellite view of
More informationEarly SUSY Searches in Events with Leptons with the ATLAS-Detector
Early SUSY Searches in Events with Leptons with the ATLAS-Detector Timo Müller Johannes Gutenberg-Universität Mainz 2010-29-09 EMG Annual Retreat 2010 Timo Müller (Universität Mainz) Early SUSY Searches
More informationContributions by M. Peskin, E. Baltz, B. Sadoulet, T. Wizansky
Contributions by M. Peskin, E. Baltz, B. Sadoulet, T. Wizansky Dark Matter established as major component of the Universe: CMB determination of its relic density further confirmed by SNs and galaxy clusters;
More informationLHC signals for SUSY discovery and measurements
06 March 2009 ATL-PHYS-SLIDE-2009-038 LHC signals for SUSY discovery and measurements Vasiliki A. Mitsou (for the ATLAS and CMS Collaborations) IFIC Valencia PROMETEO I: LHC physics and cosmology 2-6 March,
More informationLecture 18 - Beyond the Standard Model
Lecture 18 - Beyond the Standard Model Why is the Standard Model incomplete? Grand Unification Baryon and Lepton Number Violation More Higgs Bosons? Supersymmetry (SUSY) Experimental signatures for SUSY
More informationDiscovery potential for SUGRA/SUSY at CMS
Discovery potential for SUGRA/SUSY at CMS Stefano Villa, Université de Lausanne, April 14, 2003 (Based on talk given at SUGRA20, Boston, March 17-21, 2003) Many thanks to: Massimiliano Chiorboli, Filip
More information14th Lomonosov Conference on Elementary Particle Physics Moscow, 24 August 2009
M. Biglietti University of Rome Sapienza & INFN On behalf of the ATLAS Collaboration 1 14th Lomonosov Conference on Elementary Particle Physics Moscow, 24 August 2009 Theoretically favored candidates for
More informationKaluza-Klein Theories - basic idea. Fig. from B. Greene, 00
Kaluza-Klein Theories - basic idea Fig. from B. Greene, 00 Kaluza-Klein Theories - basic idea mued mass spectrum Figure 3.2: (Taken from [46]). The full spectrum of the UED model at the first KK level,
More informationSearch for SUperSYmmetry SUSY
PART 3 Search for SUperSYmmetry SUSY SUPERSYMMETRY Symmetry between fermions (matter) and bosons (forces) for each particle p with spin s, there exists a SUSY partner p~ with spin s-1/2. q ~ g (s=1)
More informationSUSY searches at LHC and HL-LHC perspectives
SUSY searches at LHC and HL-LHC perspectives Maximilian Goblirsch-Kolb, on behalf of the ATLAS and CMS collaborations 26.10.2017, LCWS 2017, Strasbourg SUSY particle production in p-p collisions Two main
More informationYukawa and Gauge-Yukawa Unification
Miami 2010, Florida Bartol Research Institute Department Physics and Astronomy University of Delaware, USA in collaboration with Ilia Gogoladze, Rizwan Khalid, Shabbar Raza, Adeel Ajaib, Tong Li and Kai
More informationMeasuring Dark Matter Properties with High-Energy Colliders
Measuring Dark Matter Properties with High-Energy Colliders The Dark Matter Problem The energy density of the universe is mostly unidentified Baryons: 5% Dark Matter: 20% Dark Energy: 75% The dark matter
More informationarxiv: v1 [hep-ph] 29 Dec 2017 SUSY (ATLAS) André Sopczak on behalf of the ATLAS Collaboration
arxiv:1712.10165v1 [hep-ph] 29 Dec 2017 SUSY (ATLAS) André Sopczak on behalf of the ATLAS Collaboration Institute of Experimental and Applied Physics, Czech Technical University in Prague, Czech Republic
More informationBeyond the SM: SUSY. Marina Cobal University of Udine
Beyond the SM: SUSY Marina Cobal University of Udine Why the SM is not enough The gauge hierarchy problem Characteristic energy of the SM: M W ~100 GeV Characteristic energy scale of gravity: M P ~ 10
More informationSUSY Phenomenology & Experimental searches
SUSY Phenomenology & Experimental searches Alex Tapper Slides available at: http://www.hep.ph.ic.ac.uk/tapper/lecture.html Reminder Supersymmetry is a theory which postulates a new symmetry between fermions
More informationProbing SUSY Dark Matter at the LHC
Probing SUSY Dark Matter at the LHC Kechen Wang Mitchell Institute for Fundamental Physics and Astronomy Texas A&M University Preliminary Examination, Feb, 24 OUTLINE Supersymmetry dark matter (DM) Relic
More informationStudy of supersymmetric tau final states with Atlas at LHC: discovery prospects and endpoint determination
Study of supersymmetric tau final states with Atlas at LHC: discovery prospects and endpoint determination University of Bonn Outlook: supersymmetry: overview and signal LHC and ATLAS invariant mass distribution
More informationNeutralino spin measurement with ATLAS detector at LHC
Neutralino spin measurement with ATLAS detector at LHC M. Biglietti 1,2, I. Borjanovic 3, G. Carlino 2, F. Conventi 1,2, E. Gorini 3,4, A. Migliaccio 1,2, E. Musto 1,2, M. Primavera 3, S. Spagnolo 3,4,
More informationSearch for Supersymmetry at LHC
Horváth Dezső: SUSY Search at LHC PBAR-11, Matsue, 2011.11.29 p. 1/40 Search for Supersymmetry at LHC PBAR-11, Matsue, 2011.11.29 Dezső Horváth KFKI Research Institute for Particle and Nuclear Physics,
More informationDPG Sascha Caron (Freiburg)
DPG 2010 Sascha Caron (Freiburg) Outline 2 Reminder: Why is SUSY interesting? SUSY production at LHC LHC, ATLAS and CMS status What can we expect in the next 2 years? Summary SUSY Reminder 3 SUPERSYMMETRY
More informationSearches for Supersymmetry at ATLAS
Searches for Supersymmetry at ATLAS Renaud Brunelière Uni. Freiburg On behalf of the ATLAS Collaboration pp b b X candidate 2 b-tagged jets pt 52 GeV and 96 GeV E T 205 GeV, M CT (bb) 20 GeV Searches for
More informationHadronic Search for SUSY with MT2 variable
Hadronic Search for SUSY with MT2 variable Esmaeel Eskandari on behalf of the CMS Collaboration School of Particles & Accelerators, Institute for Research in Fundamental Sciences (IPM) The 2nd IPM Meeting
More informationPhysics at the Tevatron. Lecture IV
Physics at the Tevatron Lecture IV Beate Heinemann University of California, Berkeley Lawrence Berkeley National Laboratory CERN, Academic Training Lectures, November 2007 1 Outline Lecture I: The Tevatron,
More informationSupersymmetry at the ILC
Supersymmetry at the ILC Abdelhak DJOUADI (LPT Paris Sud). Introduction 2. High precision measurements 3. Determination of the SUSY lagrangian 4. Connection to cosmology 5. Conclusion For more details,
More informationSzuperszimmetria keresése az LHC-nál
Horváth Dezső: Szuperszimmetria keresése Debrecen, 2011.06.16 1. fólia p. 1/37 Szuperszimmetria keresése az LHC-nál ATOMKI-szeminárium, Debrecen, 2011.06.16 Horváth Dezső MTA KFKI RMKI, Budapest és MTA
More informationDark Matter WIMP and SuperWIMP
Dark Matter WIMP and SuperWIMP Shufang Su U. of Arizona S. Su Dark Matters Outline Dark matter evidence New physics and dark matter WIMP candidates: neutralino LSP in MSSM direct/indirect DM searches,
More informationDiscovery Physics at the Large Hadron Collider
+ / 2 GeV N evt 4 10 3 10 2 10 CMS 2010 Preliminary s=7 TeV -1 L dt = 35 pb R > 0.15 R > 0.20 R > 0.25 R > 0.30 R > 0.35 R > 0.40 R > 0.45 R > 0.50 10 1 100 150 200 250 300 350 400 [GeV] M R Discovery
More informationAtlas Status and Perspectives
Atlas Status and Perspectives Bruno Mansoulié (IRFU-Saclay) On behalf of the Topics The hot news: Heavy Ion analysis Data taking in 2010 Luminosity, Data taking & quality, trigger Detector performance
More informationThe search for missing energy events at the LHC and implications for dark matter search (ATLAS and CMS)
The search for missing energy events at the LHC and implications for dark matter search (ATLAS and CMS) Valery P. Andreev UCLA representing the CMS collaboration th UCLA Symposium on Sources and Detection
More informationSearching for sneutrinos at the bottom of the MSSM spectrum
Searching for sneutrinos at the bottom of the MSSM spectrum Arindam Chatterjee Harish-Chandra Research Insitute, Allahabad In collaboration with Narendra Sahu; Nabarun Chakraborty, Biswarup Mukhopadhyay
More informationSplit SUSY and the LHC
Split SUSY and the LHC Pietro Slavich LAPTH Annecy IFAE 2006, Pavia, April 19-21 Why Split Supersymmetry SUSY with light (scalar and fermionic) superpartners provides a technical solution to the electroweak
More informationPhysics at the TeV Scale Discovery Prospects Using the ATLAS Detector at the LHC
Physics at the TeV Scale Discovery Prospects Using the ATLAS Detector at the LHC Peter Krieger Carleton University Physics Motivations Experimental Theoretical New particles searches Standard Model Higgs
More informationLHC and Dark Matter 07/23/10. Bhaskar Dutta Texas A&M University
LHC and Dark atter 7/3/ Bhaskar Dutta Texas A& University Discovery Time We are about to enter into an era of major discovery Dark atter: we need new particles to explain the content of the universe Standard
More informationDM & SUSY Direct Search at ILC. Tomohiko Tanabe (U. Tokyo) December 8, 2015 Tokusui Workshop 2015, KEK
& SUSY Direct Search at ILC Tomohiko Tanabe (U. Tokyo) December 8, 2015 Tokusui Workshop 2015, KEK Contents The ILC has access to new physics via: Precision Higgs measurements Precision top measurements
More informationDark Matter Implications for SUSY
Dark Matter Implications for SUSY Sven Heinemeyer, IFCA (CSIC, Santander) Madrid, /. Introduction and motivation. The main idea 3. Some results 4. Future plans Sven Heinemeyer, First MultiDark workshop,
More informationarxiv:hep-ph/ v1 17 Apr 2000
SEARCH FOR NEW PHYSICS WITH ATLAS AT THE LHC arxiv:hep-ph/0004161v1 17 Apr 2000 V.A. MITSOU CERN, EP Division, CH-1211 Geneva 23, Switzerland and University of Athens, Physics Department, Nuclear and Particle
More informationSearches for Beyond SM Physics with ATLAS and CMS
Searches for Beyond SM Physics with ATLAS and CMS (University of Liverpool) on behalf of the ATLAS and CMS collaborations 1 Why beyond SM? In 2012 the Standard Model of Particle Physics (SM) particle content
More informationStau Pair Production At The ILC Tohoku University Senior Presentation Tran Vuong Tung
e + Z*/γ τ + e - τ Stau Pair Production At The ILC Tohoku University Senior Presentation Tran Vuong Tung 1 Outline Introduction of the International Linear Collider (ILC) Introduction of (g μ -2) in the
More informationCOSMOLOGY AT COLLIDERS
COSMOLOGY AT COLLIDERS Jonathan Feng University of California, Irvine 23 September 2005 SoCal Strings Seminar 23 September 05 Graphic: Feng N. Graf 1 COSMOLOGY NOW We are living through a revolution in
More informationSupersymmetric Origin of Matter (both the bright and the dark)
Supersymmetric Origin of Matter (both the bright and the dark) C.E.M. Wagner Argonne National Laboratory EFI, University of Chicago Based on following recent works: C. Balazs,, M. Carena and C.W.; Phys.
More informationSUSY AND COSMOLOGY. Jonathan Feng UC Irvine. SLAC Summer Institute 5-6 August 2003
SUSY AND COSMOLOGY Jonathan Feng UC Irvine SLAC Summer Institute 5-6 August 2003 Target Audience From the organizers: graduate students, junior postdocs ¾ experimentalists, ¼ theorists Students enjoy the
More informationSUSY at Accelerators (other than the LHC)
SUSY at Accelerators (other than the LHC) Beate Heinemann, University of Liverpool Introduction Final LEP Results First Tevatron Run 2 Results Summary and Outlook IDM 2004, Edinburgh, September 2004 Why
More informationTesting the Standard Model and Search for New Physics with CMS at LHC
Dezső Horváth: Search for New Physics with CMS FFK2017, Warsaw, Poland p. 1 Testing the Standard Model and Search for New Physics with CMS at LHC FFK-2017: International Conference on Precision Physics
More informationLecture 4 - Beyond the Standard Model (SUSY)
Lecture 4 - Beyond the Standard Model (SUSY) Christopher S. Hill University of Bristol Warwick Flavour ++ Week April 11-15, 2008 Recall the Hierarchy Problem In order to avoid the significant finetuning
More informationarxiv:hep-ex/ v1 30 Sep 1997
CMS CR 997/0 SEARCHES FOR SUSY AT LHC arxiv:hep-ex/970903v 30 Sep 997 For the CMS Collaboration Avtandyl Kharchilava Institute of Physics, Georgian Academy of Sciences, Tbilisi ABSTRACT One of the main
More informationSearch for top squark pair production and decay in four bodies, with two leptons in the final state, at the ATLAS Experiment with LHC Run2 data
Search for top squark pair production and decay in four bodies, with two leptons in the final state, at the ATLAS Experiment with LHC Run data Marilea Reale INFN Lecce and Università del Salento (IT) E-mail:
More informationCosmology at the LHC
Cosmology at the LHC R. Arnowitt*, A. Aurisano*^, B. Dutta*, T. Kamon*, N. Kolev**, P. Simeon*^^, D. Toback*, P. Wagner*^ *Department of Physics, Texas A&M University **Department of Physics, Regina University
More informationSupersymmetry Without Prejudice at the LHC
Supersymmetry Without Prejudice at the LHC Conley, Gainer, JLH, Le, Rizzo arxiv:1005.asap J. Hewett, 10 09 Supersymmetry With or Without Prejudice? The Minimal Supersymmetric Standard Model has ~120 parameters
More informationSUSY at Accelerators (other than the LHC)
SUSY at Accelerators (other than the LHC) Beate Heinemann, University of Liverpool Introduction Final LEP Results First Tevatron Run 2 Results Summary and Outlook IDM 2004, Edinburgh, September 2004 Why
More informationEarly SUSY searches at the LHC
on behalf of the ATLAS and CMS Collaborations Imperial College London E-mail: a.tapper@imperial.ac.uk Supersymmetry may give rise to striking events that could be discovered early in LHC running. Search
More informationSearches for Physics Beyond the Standard Model at the Tevatron
FERMILAB-CONF-10-704-E-PPD Proceedings of the XXX. Physics in Collision Searches for Physics Beyond the Standard Model at the Tevatron Chris Hays 1 for the CDF and D0 Collaborations (1) Oxford University,
More informationLHC Capability for Dark Matter
LHC Capability for Dark atter 5// Bhaskar Dutta Texas A& University Discovery Time We are about to enter into an era of major discovery Dark atter: we need new particles to explain the content of the universe
More informationDark matter and LHC: complementarities and limitations
Dark matter and LHC: complementarities and limitations,1,2, F. Mahmoudi 1,2,3, A. Arbey 1,2,3, M. Boudaud 4 1 Univ Lyon, Univ Lyon 1, ENS de Lyon, CNRS, Centre de Recherche Astrophysique de Lyon UMR5574,
More informationCMS. Saeid Paktinat. On behalf of the CMS Collaborations. (IPM, Tehran)
SUSY @ CMS (IPM, Tehran) On behalf of the CMS Collaborations outline SUSY Common Signatures Some Examples Conclusion 2 Why SUperSYmmetry(1) SM describes a lot of experimental results very precisely, but
More informationInterconnection between Particle Physics and Cosmology at the LHC
Interconnection between Particle Physics and Cosmology at the LHC Selections from the Cosmo Secret Cube Catalogue Transformer Cube Standard Model Cube PPC Cube Premiere Props Teruki Kamon Mitchell Institute
More informationMeasuring Relic Density at the LHC
easuring Relic Density at the LHC Bhaskar Dutta Collaborators R. Arnowitt, A. Gurrola, T. Kamon, A. Krislock, D. Toback Texas A& University 7 th July 8 easuring Relic Density at the LHC OUTLINE Dark atter
More informationSearch for R-parity violating Supersymmetry. III Phys. Inst. A, RWTH Aachen
R-parity violating Supersymmetry III Phys. Inst. A, RWTH Aachen Introduction to R-parity violating SUSY Three DØ searches via non-zero LLE (short and long lived LSP) and LQD couplings Perspectives for
More informationInclusive searches in ATLAS: How can we discover SUSY in 2009
Inclusive searches in ATLAS: How can we discover SUSY in 2009 George Redlinger Brookhaven National Laboratory (for the ATLAS Collaboration) University of Michigan LHC Dark Matter Workshop 6-10 Jan 2009
More informationLHC Impact on DM searches
LHC Impact on DM searches Complementarity between collider and direct searches for DM Outline Introduction (complementarity of DM searches) Dark Matter signals at the LHC (missing ET, jets, etc... ) Particular
More informationS.Abdullin ITEP. July 8, 2003 S.Abdullin (UMD) LHC SUSY Potential 1
S.Abdullin ITEP July 8, 2003 S.Abdullin (UMD) LHC SUSY Potential 1 Outline LHC and the Detectors SUSY : MSSM, msugra SUSY signatures Triggering on SUSY Inclusive SUSY searches SUSY spectroscopy Summary
More informationSUSY Searches : lessons from the first LHC Run
SUSY Searches : lessons from the first LHC Run P. Pralavorio, On behalf of the ATLAS and CMS Collaborations. CPPM, Aix-Marseille Univ. and CNRS/INP3, 63 avenue de Luminy, case 9, 388 Marseille cedex 9,
More informationProbing Dark Matter at the LHC Alex Tapper
Probing Dark Matter at the LHC Alex Tapper 1 Outline The LHC and ATLAS and CMS detectors Detector performance and Standard Model physics Status of Dark Matter searches at the LHC MET based searches Long-lived
More informationOutline: Introduction Search for new Physics Model driven Signature based General searches. Search for new Physics at CDF
PE SU Outline: Introduction Search for new Physics Model driven Signature based General searches R Search for new Physics at CDF SUperSYmmetry Standard Model is theoretically incomplete SUSY: spin-based
More informationEmerging the 7 TeV LHC & the LC
Emerging BSM @ the 7 TeV LHC & the LC T.G. Rizzo 03/16/11 THE QUESTIONS: How is electroweak symmetry broken? How is the hierarchy stabilized? What is the origin of flavor? Are there more than 4 dimensions?
More informationSupersymmetry Basics. J. Hewett SSI J. Hewett
Supersymmetry Basics J. Hewett SSI 2012 J. Hewett Basic SUSY References A Supersymmetry Primer, Steve Martin hep-ph/9709356 Theory and Phenomenology of Sparticles, Manual Drees, Rohini Godbole, Probir
More informationStatus of Supersymmetric Models
Status of Supersymmetric Models Sudhir K Vempati CHEP, IISc Bangalore Institute of Physics, Bhubhaneswar Feb, 203 Outline Why Supersymmetry? Structure of MSSM Experimental Status New models of SUSY S/(S+B)
More informationMaster Thesis Topics 2013/14 in Experimental Particle Physics
July 2, 23 Master Thesis Topics 23/4 in Experimental Particle Physics at LS Schaile At LS Schaile we offer a broad spectrum of master thesis topics in experimental elementary particle physics. Contacts:
More informationWhat the LHC Will Teach Us About Low Energy Supersymmetry
What the LHC Will Teach Us About Low Energy Supersymmetry Darin Acosta representing ATLAS & Outline Introduction to SUSY, LHC, and the Detectors Trigger strategies at start-up Inclusive squark/gluino searches
More informationSupersymmetry at the LHC: Searches, Discovery Windows, and Expected Signatures
Supersymmetry at the LHC: Searches, Discovery Windows, and Expected Signatures Darin Acosta representing ATLAS & Outline Introduction to SUSY, LHC, and the Detectors Non-Higgs sparticle searches: Trigger
More informationNew physics at the LHC
New physics at the LHC Giacomo Polesello INFN Sezione di Pavia Motivations for going beyond Standard Model Observations unexplained by SM Dark matter problem Matter-antimatter asymmetry problem Fine-tuning
More informationSupersymmetry and other theories of Dark Matter Candidates
Supersymmetry and other theories of Dark Matter Candidates Ellie Lockner 798G Presentation 3/1/07 798G 3/1/07 1 Overview Why bother with a new theory? Why is Supersymmetry a good solution? Basics of Supersymmetry
More informationProbing SUSY Contributions to Muon g-2 at LHC and ILC
Probing SUSY Contributions to Muon g-2 at LHC and ILC Motoi Endo (Tokyo) Based on papers in collaborations with ME, Hamaguchi, Iwamoto, Yoshinaga ME, Hamaguchi, Kitahara, Yoshinaga ME, Hamaguchi, Iwamoto,
More informationSearch for squarks and gluinos with the ATLAS detector. Jeanette Lorenz (LMU München)
Search for squarks and gluinos with the ATLAS detector Jeanette Lorenz (LMU München) Research Area B Science Day, Supersymmetry Symmetry between fermions and bosons Only possible extension of Poincare
More informationICHEP 2008 Philadelphia
ICHEP 2008 Philadelphia LHC CERN Geneva 2008 Sascha Caron Standard SUSY at LHC 2 Almost all LHC sectors are cooled down (2 sectors at this moment at 20-30K) Start at s = 10 TeV in 2008 2008 Luminosity
More informationKaluza-Klein Dark Matter
Kaluza-Klein Dark Matter Hsin-Chia Cheng UC Davis Pre-SUSY06 Workshop Complementary between Dark Matter Searches and Collider Experiments Introduction Dark matter is the best evidence for physics beyond
More informationSUSY Models, Dark Matter and the LHC. Bhaskar Dutta Texas A&M University
SUSY odels, Dark atter and the LHC Bhaskar Dutta Texas A& University 11/7/11 Bethe Forum 11 1 Discovery Time We are about to enter into an era of major discovery Dark atter: we need new particles to explain
More informationSupersymmetry after LHC Run 1. Brian Petersen CERN
Supersymmetry after LHC Run 1 Brian Petersen CERN Outline Supersymmetry What and why? Searching for Supersymmetry at the LHC Brief intro to LHC and the ATLAS experiment and how we search for Supersymmetry
More informationDark Matter motivated SUSY collider signatures
Dark Matter motivated SUSY collider signatures Southampton University & Rutherford Appleton LAB 1 OUTLINE SUSY as one of the best candidate for underlying theory Viable Supersymmetric models minimal Supergravity
More informationR-hadrons and Highly Ionising Particles: Searches and Prospects
R-hadrons and Highly Ionising Particles: Searches and Prospects David Milstead Stockholm University The need for new particles Why they could be heavy and stable How can we identify them in current and
More informationDirect Detection Rates of Neutralino WIMP in MSSM
Direct Detection Rates of Neutralino WIMP in MSSM Yeong Gyun Kim a, 1 Takeshi Nihei b, Leszek Roszkowski a, and Roberto Ruiz de Austri c a Department of Physics, Lancaster University, Lancaster LA1 4YB,
More informationSearches at LEP. Ivo van Vulpen CERN. On behalf of the LEP collaborations. Moriond Electroweak 2004
Searches at LEP Moriond Electroweak 2004 Ivo van Vulpen CERN On behalf of the LEP collaborations LEP and the LEP data LEP: e + e - collider at s m Z (LEP1) and s = 130-209 GeV (LEP2) Most results (95%
More informationMICROPHYSICS AND THE DARK UNIVERSE
MICROPHYSICS AND THE DARK UNIVERSE Jonathan Feng University of California, Irvine CAP Congress 20 June 2007 20 June 07 Feng 1 WHAT IS THE UNIVERSE MADE OF? Recently there have been remarkable advances
More informationSUSY searches with ATLAS
SUSY searches with ATLAS on behalf of the ATLAS Collaboration University of Victoria / TRIUMF, Canada June 29 2015 QFTHEP - Samara 1/23 Outline: From Mysterious to Science ATLAS and the LHC are zooming
More informationStrategy for early SUSY searches at ATLAS
SUSY07 The 15th International Conference on Supersymmetry and the Unification of Fundamental Interactions Karlsruhe, Germany Strategy for early SUSY searches at ATLAS July 26, 2007 Shimpei Yamamoto (ICEPP,
More informationSneutrino dark matter and its LHC phenomenology
Sneutrino dark matter and its LHC phenomenology Chiara Arina Physics challenges in the face of LHC-14 workshop @ IFT 1 September 23 th 2014 Bolshoi simulation, NASA Sneutrino dark matter in the MSSM? Left-handed
More informationSUSY Phenomenology & Experimental searches
SUSY Phenomenology & Experimental searches Slides available at: Alex Tapper http://www.hep.ph.ic.ac.uk/~tapper/lecture.html Objectives - Know what Supersymmetry (SUSY) is - Understand qualitatively the
More informationTheoretical Developments Beyond the Standard Model
Theoretical Developments Beyond the Standard Model by Ben Allanach (DAMTP, Cambridge University) Talk outline Bestiary of some relevant models SUSY dark matter Spins and alternatives B.C. Allanach p.1/18
More informationCMS Search for Supersymmetry at the LHC
CMS Search for Supersymmetry at the LHC [Credits] Images of Baryon Acoustic Bscillations with Cosmic Microwave Background by E.M. Huff, the SDSS-III team, and the South Pole Telescope team. Graphic by
More informationPseudo-Dirac Bino as Dark Matter and Signatures of D-Type G
and Signatures of D-Type Gauge Mediation Ken Hsieh Michigan State Univeristy KH, Ph. D. Thesis (2007) ArXiv:0708.3970 [hep-ph] Other works with M. Luty and Y. Cai (to appear) MSU HEP Seminar November 6,
More informationProbing Supersymmetric Connection with Dark Matter
From サイエンス 82 Probing Supersymmetric Connection with Dark Matter Taken from Science, 1982 Teruki Kamon Department of Physics Texas A&M University November 3, 2005 Physics Colloquium, Texas Tech University
More informationCold Dark Matter beyond the MSSM
Cold Dark Matter beyond the MM Beyond the MM inglet Extended MM inglet Extended tandard Model References V. Barger, P. Langacker, M. McCaskey, M. J. Ramsey-Musolf and G. haughnessy, LHC Phenomenology of
More informationAstroparticle Physics at Colliders
Astroparticle Physics at Colliders Manuel Drees Bonn University Astroparticle Physics p. 1/29 Contents 1) Introduction: A brief history of the universe Astroparticle Physics p. 2/29 Contents 1) Introduction:
More informationProbing the Connection Between Supersymmetry and Dark Matter
Probing the Connection Between Supersymmetry and Dark Matter Bhaskar Dutta Texas A&M University Physics Colloquium, OSU, March 30, 2006 March 30, 2006 Probing the Connection Between SUSY and Dark Matter
More informationLHC State of the Art and News
LHC State of the Art and News ATL-GEN-SLIDE-2010-139 16 June 2010 Arno Straessner TU Dresden on behalf of the ATLAS Collaboration FSP 101 ATLAS Vulcano Workshop 2010 Frontier Objects in Astrophysics and
More informationHiggs Signals and Implications for MSSM
Higgs Signals and Implications for MSSM Shaaban Khalil Center for Theoretical Physics Zewail City of Science and Technology SM Higgs at the LHC In the SM there is a single neutral Higgs boson, a weak isospin
More informationCMS Searches for New Physics
CMS Searches for New Physics Christian Autermann, for the CMS collaboration I. Phys. Inst. RWTH Aachen University, Germany QCD14 2 Overview Searches for New Physics at CMS Inclusive search for Supersymmetry
More informationAbdelhak DJOUADI (LPT Orsay/Next Southampton)
SUSY@ILC Abdelhak DJOUADI (LPT Orsay/Next Southampton) 1. Probing SUSY 2. Precision SUSY measurements at the ILC 3. Determining the SUSY Lagrangian 4. Summary From the physics chapter of the ILC Reference
More informationEarly SUSY searches at the LHC
Early SUSY searches at the LHC Alex Tapper Searching for SUSY at the LHC and interplay with astroparticle physics Institute of Physics Workshop, 24 th March 20, Imperial College London Introduction Many
More informationHiggs Searches at CMS
Higgs Searches at CMS Ashok Kumar Department of Physics and Astrophysics University of Delhi 110007 Delhi, India 1 Introduction A search for the Higgs boson in the Standard Model (SM) and the Beyond Standard
More informationSupersymmetry at the LHC
Supersymmetry at the LHC What is supersymmetry? Present data & SUSY SUSY at the LHC C. Balázs, L. Cooper, D. Carter, D. Kahawala C. Balázs, Monash U. Melbourne SUSY@LHC.nb Seattle, 23 Sep 2008 page 1/25
More information