Shima Shimizu (Kobe U.)
|
|
- Jonas Payne
- 6 years ago
- Views:
Transcription
1 Shima Shimizu (Kobe U.) KUBEC DM workshop 7/Aug/014
2 Dark ma'er search with mono- X events If Dark Ma9er couples to Standard Model (SM) paracles, DM is searchable at collider experiments. Weakly interacang massive paracles (WIMPs), χ. WIMP pair producaon at collider. Direct search Indirect search (WIMP anihilaaon) SM SM DM DM Collider experiments Tag the pair- producaon system by the iniaal state radiaaon (ISR) of SM paracles, X: pp - > χχ + X WIMPs don t interact with the detectors. à Large ing transverse energy, q - X èsearch of Mono- X + q
3 Mono- X interpreta9ons EffecAve Field Theories (EFTs) Contact interacaon between SM paracles and DM, χ. Mediator is too heavy to be directly produced and is integrated out. Two parameters: Suppression scale: M * = M med / (g SM g DM ) Dark ma9er mass: m Χ M med : mediator mass g : coupling Spin- dependent interacaon Simplified models Mediator is not integrated out. Addressing validity quesaon of EFT at high energies.
4 detector Tracking system : η <.5 Calorimeter : η <4.9 Muon system : η <.7 Three- level trigger system 4
5 Available pp collision data s = 7 TeV: 5 e- 1 s = 8 TeV: 0 e- 1 MulAple interacaons occurs simultaneously in a colliding. Increased in 01 u Recorded Luminosity [pb/0.1] u Preliminary 01, LHC Delivered 0 Recorded s = 8 TeV Delivered:.8 fb Recorded: 1. fb Physics: 0. fb Good for Physics , s = 7 TeV Delivered: 5.46 fb Recorded: 5.08 fb Physics: 4.57 fb 5 0 Jan Apr Jul Oct Jan Apr Online Luminosity 160 s = 8 TeV, Ldt = 1.7 fb, <µ> = s = 7 TeV, Ldt = 5. fb, <µ> = Z- >μμ event with 0 verfces Total Integrated Luminosity fb data Mean Number of Interactions per Crossing Jul Oct Month in Year
6 6
7 7 u Event selecaons Large ET An energeac object (X) Veto on (extra) leptons Veto on >1 addiaonal jets Good separaaon in φ between ET, X and addiaonal jets
8 8 General analysis strategies Event selecaons Large An energeac object (X) Veto on (extra) leptons Veto on >1 addiaonal jets Good separaaon in φ between, X and addiaonal jets SM processes are background to the DM search. W/Z backgrounds e.g: Z- >νν or W- >lν with lepton outside of the acceptance, etc Usually esamated using control regions with lepton requirements. MulAjet backgrounds EsAmated by events with jet aligned with the direcaon. Diboson producaon, Top producaon Usually esamated based on MC simulaaon.
9 9 Mono- γ search Mono- jet search Mono- W/Z (hadronic) search Mono- W search Mono- Z search
10 Mono- γ search analysis s=7 TeV, 4.6 e - 1 PRL 1, (01) mono- γ Event selecaon Isolated, well- defined photon with p γ T > 150 GeV E T > 150 GeV Lepton veto N jet < for p jet T > 0 GeV Δφ(γ, E T ) > 0.4, Δφ(γ, jet) > 0.4, Δφ(E T, jet) > 0.4 Backgrounds W/Z + γ ß control region W/Z + jet ß esamaaon of fake γ from e or jet γ + jet, mulajet ß data Events / GeV L dt = 4.6 fb Data 011 ( s =7 TeV) Z()+ W/Z+ W/Z+jet top, +jet, multi-jet, diboson Total background ADD NLO, M =1.0 TeV, n= D WIMP, D5, m = GeV, M =400 GeV * (total) (total)
11 Mono- γ search results EFT operators D1, D5, D8 and D9 are considered. Limits set on M *, for a given m χ. à Converted to χ- nucleon cross- secaon limit for a comparison. mono- γ m χ = 1 GeV m χ = 1. TeV D1 M * > 1 GeV M * > 5 GeV D5 M * > 585 GeV M * > 156 GeV D8 M * > 585 GeV M * > 0 GeV D9 M * > 794 GeV M * > 188 GeV 11 ] -Nucleon cross section [cm % CL, Spin Dependent SIMPLE CDF, D8, q q j() 1 Dirac CMS (5 fb ), D8, qq (), D8, qq () Dirac, D9, qq () Dirac Picasso m Dirac s =7 TeV, Ldt = 4.6 fb 90% CL, Spin Independent XENON0 CDMS CoGeNT CDF, D5, qq j() CMS (5 fb ), D5, qq () Dirac, D5, q q () Dirac, D1, qq () 1 Dirac m Dirac Limits from collider experiment is compeaave at low m χ. Spin- dependent limits are smaller than the direct searches.
12 1 Mono- γ search Mono- jet search Mono- W/Z (hadronic) search Mono- W search Mono- Z search
13 Event selec9on (7TeV analysis) s=7 TeV, 4.6 e - 1 JHEP04 (01) 075 mono- jet 1 Event selecaon 4 Signal Regions (SR), p T jet,leading > 10, 0, 50 and 500 GeV ana- k t jet with R=0.4, η < No more than one addiaonal jet with p T >0 GeV, η <4.5 Δφ(p T, p T jet ) >0.5 Lepton vetos (loose definiaon for SR- leptons) Electron: p T >0 GeV, η <.47, Muon: p T >7 GeV, η <.5 Dominant background Z/W + jets CR is defined with explicit (Aght) lepton requirement ß EsAmated using Control Region (CR)
14 mono- jet 14 Results Dominant systemaac uncertainaes from: JES, TheoreAcal uncertainaes of W and Z producaon, shapes of W Good agreement with the SM predicaons Events/GeV Ldt = 4.7 fb s= 7 TeV Data 011 D5 M=0GeV M =680GeV * ADD δ= M D =.5TeV Sum of backgrounds Z( νν)+jets W( lν)+jets Z( ll)+jets tt + single top Multijet Di-bosons Non collision SR1 Events/GeV 1 - Ldt = 4.7 fb s= 7 TeV SR4 Data 011 D5 M=0GeV M =680GeV * ADD δ= M D =.5TeV Sum of backgrounds Z( νν)+jets W( lν)+jets Z( ll)+jets tt + single top Di-bosons
15 EFT interpreta9on mono- jet 15 * Suppression scale M s=7 TeV Ldt = 4.7 fb 1 Operator D1, SR, 90%CL Expected limit (± 1 exp ) Observed limit (± 1 theory ) Thermal relic WIMP mass m * Suppression scale M s=7 TeV Ldt = 4.7 fb 1 Operator D5, SR, 90%CL Expected limit (± 1 exp ) Observed limit (± 1 theory ) Thermal relic WIMP mass m * Suppression scale M s=7 TeV Ldt = 4.7 fb Operator D11, SR4, 90%CL Expected limit (± 1 exp ) Observed limit (± 1 theory ) Thermal relic WIMP mass m * Suppression scale M s=7 TeV Ldt = 4.7 fb Operator D8, SR, 90%CL Expected limit (± 1 exp ) Observed limit (± 1 theory ) Thermal relic 1 WIMP mass m * Suppression scale M Operator D9, SR4, 90%CL Expected limit (± 1 exp ) Observed limit (± 1 theory ) Thermal relic 1 s=7 TeV Ldt = 4.7 fb WIMP mass m M * : suppression scale M * =M med / (g SM g DM ) m χ : WIMP mass
16 Cross- sec9on limits mono- jet 16 ] WIMP-nucleon cross section [ cm SIMPLE 011 Picasso 01 D8: CDF qq j() D8: CMS qq j() 1 Dirac Dirac s = 7 TeV, 4.7 fb, 90%CL D8: qq j() Dirac D9: qq j() Dirac theory Spin-dependent WIMP mass m [ GeV ] ] WIMP-Nucleon cross section [ cm XENON0 01 CDMSII low-energy CoGeNT 0 D5: CDF qq j() Dirac 1 s = 7 TeV, 4.7 fb, 90%CL D1: qq j() Dirac D5: qq j() Dirac D11: gg j() Dirac theory Spin-independent WIMP mass m [ GeV ] Tighter constraint compared to Mono- γ search (D8, D9 and D5)
17 8 TeV measurement mono- jet s=8 TeV,.5 e CONF TeV data.5 e - 1 Half of the full staasacs. Analysis follows closely the 7 TeV measurement. No excess is seen. A [pb] 1 - Preliminary Ldt=.5 fb s = 8 TeV 95% CL Expected limit Observed limit SR1 SR SR SR4 ± 1 exp ± exp [Events/GeV] T dn/de 5 data 01 Preliminary Total BG Z ( ) + jets 4 W ( l ) + jets Ldt=.5fb Multi-jet s = 8 TeV SR1 Non-collision BG Z ( ll ) + jets Dibosons tt + single top ADD n=, M = TeV (x5) D D5 M=80GeV, M =670GeV (x5) * -4 G ~ + ~ q/ ~ g, M ~ =1TeV, M ~ ~= ev (x5) q/ g G [Events/GeV] T dn/de 1 Preliminary Ldt=.5fb s = 8 TeV data 01 Total BG Z ( ) + jets W ( l ) + jets Z ( ll ) + jets Dibosons tt + single top ADD n=, M = TeV D D5 M=80GeV, M=670GeV * -4 G ~ + ~ q/ ~ g, M ev q ~ ~=1TeV, M~= /g G SR4 1 Data / BG Data / BG E T E T
18 Results Expected lower limits for D5 and D8 is larger by % than 7 TeV. Expected lower limits for D11 is unchanged. * Suppression scale M Operator D5, SR, 90%CL Expected limit (± 1 ± exp ) Observed limit (± 1 theory ) Thermal relic Preliminary s=8 TeV Ldt =.5 fb effective theory not valid mono- jet 18 WIMP mass m * Suppression scale M Operator D8, SR, 90%CL Expected limit (± 1 ± exp ) Observed limit (± 1 theory ) Thermal relic Preliminary s=8 TeV Ldt =.5 fb effective theory not valid WIMP mass m * Suppression scale M 500 Operator D11, SR, 90%CL Expected limit (± 1 ± exp ) Observed limit (± 1 theory ) Thermal relic Preliminary s=8 TeV Ldt =.5 fb effective theory not valid WIMP mass m
19 MC study of sensi9vity at 14 TeV mono- jet SimulaAon only ATL- PHYS- PUB [Events/GeV] dn / d Event selecaon Simulation Preliminary s = 14 TeV Ldt = 0 fb Z Wl top Leading jet s = 8 TeV p T >00 GeV, η <.0 s = 14 TeV > 400, 600, 800 GeV Jet definiaon p T >0 GeV, η <4.5 p T >50 GeV, η <.6 Lepton veto N jet <= Δφ(, jet) > 0.5 p T >7 GeV, η <~.5 Harder distribuaons expected at 14 TeV, more significant for signal. [Events/GeV] dn / d 1 - SM Simulation Preliminary 8 TeV, 14 TeV, Z Ldt = 0 fb Ldt = 0 fb Normalized entries - - DM Simulation Preliminary 8 TeV 14 TeV D5 m =50 GeV
20 Prospects with EFT approach (D5) mono- jet 0 Suppression scale M * Simulation Preliminary D5, m = 50 GeV 5% syst < g g <4 SM DM MET > 400 GeV Suppression scale M * Simulation Preliminary D5, m = 400 GeV 5% syst < g g <4 SM DM MET > 400 GeV 500 MET > 600 GeV MET > 800 GeV 0 14 TeV, 00 fb 14 TeV, 5 fb 14 TeV, 5 fb 8 TeV, 0 fb 14 TeV, 000 fb 500 MET > 600 GeV MET > 800 GeV 0 14 TeV, 00 fb 14 TeV, 5 fb 14 TeV, 5 fb 8 TeV, 0 fb 14 TeV, 000 fb Limits are expected to be improved by a factor of, with the 14 TeV data expected in the 1 st year. For m χ = 50 GeV, M * detecaon can be done up to 1.5 TeV at 5σ. (first year of data- taking.) significance [] Simulation Preliminary s=14 TeV D5, m = 50 GeV < g g < 4 SM DM 5% systematic Ldt=5fb 5 discovery evidence [TeV] M *
21 1 Mono- γ search Mono- jet search Mono- W/Z (hadronic) search Mono- W search Mono- Z search
22 Mono- W/Z search mono- W/Z s=8 TeV, 0 e - 1 PRL (014) Strong constraint from mono- jet, due to large radiaaon rate of q and g. AssumpAon: same coupling for up- type and down- type quarks. C(u) = C(d) If DM has opposite coupling to up- type and down- type quarks C(u) = - C(d) è Interference can make Mono- W producaon be a dominant process
23 Analysis mono- W/Z Hadronic decay of W/Z à Reconstructed as a massive fat- jet Large- R (=fat) jet: Cambrige- Aachen jet with R=1. m jet is well described by simulaaon in top events. Narrow- jet: ana- k T jet with R=0.4 Event selecaon Large- R jet with p T >50 GeV, η <1., 50<m jet <10GeV Veto on e, μ, γ Veto on >1 narrow jet with p T >40 GeV, η <4.5 Not overlapping with large- R jet Veto if any narrow jet is close to as Δφ(, jet) < 0.4 requirements signal regions: > 50 GeV, 500 GeV
24 Event yields mono- W/Z 4 W/Z backgrounds esamated using control regions. No excess is observed
25 Results mono- W/Z 5 Senario with C(u) = - C(d) gives strong constraint. For D5 with C(u) = C(d), 7 TeV mono- jet result is slightly be9er. 8 TeV mono- W/Z gives more sensiavity than 7 TeV mono- jet for D9.
26 6 Mono- γ search Mono- jet search Mono- W/Z (hadronic) search Mono- W search Mono- Z search
27 Search with one lepton + ing Analysis is done for W search, but can be interpreted as DM search as well. Event selecaon e- channel: Electron with > 15 GeV > 15 GeV Veto on addiaonal electron with > 0 GeV μ- channel: Muon with > 45 GeV > 45 GeV Veto on addiaonal muon with > 0 GeV m T (l, ) requirement of [597, 796, 84] GeV Events Events Data/Bkg Data/Bkg mono- W s=8 TeV, 0 e - 1 arxiv accepted by JHEP Shown for m T > 5 GeV W e s = 8 TeV L dt = 0. fb W µ s = 8 TeV L dt = 0. fb Data 01 W (0.5 TeV) W (1 TeV) W ( TeV) W Z Top quark Diboson Multijet 7 Data 01 W (0.5 TeV) W (1 TeV) W ( TeV) W Z Top quark Diboson Multijet
28 Result mono- W 8 Be9er constraint by mono- W/Z (hadronic decay) search * M 5 4 mono-w lep, D9 mono-w lep, D5c mono-w lep, D5d mono-w lep, D1 mono-w/z had, D9 mono-w/z had, D5c mono-w/z had, D5d mono-w/z had, D1 mono-z lep, D9 mono-z lep, D5 mono-z lep, D1 D5c: construcave interference C(u) = - C(d) D5d: destrucave interference C(u) = C(d) T l + E 90% CL s = 8 TeV, Ldt = 0. fb m
29 9 Mono- γ search Mono- jet search Mono- W/Z (hadronic) search Mono- W search Mono- Z search
30 Mono- Z analysis Search with leptonically decaying Z s=8 TeV, 0 e - 1 PRD (014) Also sensiave to direct Z- χ interacaon. dimension- 5 and - 7 operators (PRD 87, ) q q q Z mono- Z χ χ 0 ISR nucleon- χ Z Event selecaon A opposite- sign lepton pair (e + e - or μ + μ - ) with leptons: p T >0 GeV, η <~.5 q Z/γ χ χ direct Z- χ 76 GeV < m ll < 6 GeV (Z mass peak), η ll <.5 well balanced against Veto on rd leptons with p T > 7 GeV Veto on jets with p T > 5 GeV, η <.5 requirements 4 signal regions: > 150, 50, 50 and 450 GeV
31 Event yields Main backgrounds ZZ and WZ, esamated using NLO MCs. No excess is seen Entries / 50 GeV Data/MC 8 mono- Z 7 Data WZ W/Z+jets ZZll 6 WW/Top quark Systematic Unc. 5 D1, M =0.050 TeV * ZZ max., M =0.7 TeV * 4 Mediator, m =1 TeV, f=6 L=0. fb s=8 TeV m =00 GeV
32 EFT interpreta9on Nucleon- χ: D1, D5 and D9 Z- χ: dimension- 5: ZZχχ dimension- 7: ZZχχ with maximum / negligible Zγ* contribuaon M * 4 L=0. fb s=8 TeV 90% C.L. D1 D5 D9 ZZ ZZ max. ZZ no m mono- Z ] -nucleon cross section [cm L=0. fb s=8 TeV 90% C.L. 1 D9 D9 8 TeV W/Z had.( ) D9 7 TeV jet( ) COUPP 01 SIMPLE 011 Picasso 01 + IceCube W W - IceCube b b spin dependent m ] -nucleon cross section [cm L=0. fb s=8 TeV 90% C.L. 1 D1 D5 D5 8 TeV W/Z had.( ) D1 7 TeV jet( ) D5 7 TeV jet( ) CoGeNT 0 CDMS 014 XENON0 01 LUX 014 spin independent m
33 Interpreta9on with simplified model mono- Z Assume scalar t- channel mediator η, with η- χ coupling strength f. Color triplet, EW doublet, Y W =1/ m L=0. fb s=8 TeV m % C.L. on coupling f
34 Summary: Latest Results Mono- 7 TeV ] -N cross-section [cm Mono- W/Z 8 TeV Mono- 8 TeV Mono- 8 TeV ] -N cross-section [cm % CL 0. fb s = 8 TeV mono-w lep, D9 mono-w/z had, D9 mono-jet 7 TeV, D9 mono-z lep, D9 spin-dependent 1 mono-w lep, D5c mono-w lep, D5d mono-z lep, D5 90% CL LUX 014 CoGeNT 0 XENON0 01 SuperCDMS 014 mono-jet 7 TeV, D5 1 PICASSO 01 SIMPLE IceCube W W IceCube bb COUPP fb s = 8 TeV m spin-independent m mono-w/z had, D5c mono-w/z had, D5d 4
35 Summary 5 If Dark Ma9er couples Standard Model paracles, DM can be produced at colliders. Search of WIMP pair producaon, with iniaal state radiaaon of energeac object: Mono- X + large has performed several Mono- X searches. 7 TeV data (5 e - 1 ) : X= photon, jet 8 TeV data (0 e - 1 ) : X= W/Z(- >qq), W(- >lν), Z(- >ll) Good agreement is seen between data and SM predicaons. Limits are set on EffecAve Field Theory The coming 1/14 TeV runs are expected to give be9er sensiavity in DM searches.
36 Backup 6
37 EFT operators 7 from J. Goodman et. al., PRD 8, 1160 (0)
38 Upgrade study: EFT validity 8 Validity of EFT requires Q Tr < M * (g SM g DM ) Q Tr : interacaon scale R tot Mmed FracAon of valid events [%] tot R Mmed Simulation Preliminary s 1 m = 8 TeV - = 50 GeV L = 0 fb > 400 GeV > 600 GeV > 800 GeV g g SM DM [%] tot R Mmed Simulation Preliminary s 1 m = 14 TeV - = 50 GeV L = 5 fb > 400 GeV > 600 GeV > 800 GeV g g SM DM [%] tot R Mmed 0 80 Simulation Preliminary [%] tot R Mmed 0 80 Simulation Preliminary s 1 m = 8 TeV - = 400 GeV L = 0 fb > 400 GeV > 600 GeV > 800 GeV g g SM DM s 1 m = 14 TeV - = 400 GeV L = 5 fb > 400 GeV > 600 GeV > 800 GeV g g SM DM
39 8 TeV mono- jet event yields 9
ATLAS Missing Energy Signatures and DM Effective Field Theories
ATLAS Missing Energy Signatures and DM Effective Field Theories Theoretical Perspectives on New Physics at the Intensity Frontier, Victoria, Canada James D Pearce, University of Victoria Sept 11, 014 1
More informationMono-X, Associate Production, and Dijet searches at the LHC
Mono-X, Associate Production, and Dijet searches at the LHC Emily (Millie) McDonald, The University of Melbourne CAASTRO-CoEPP Joint Workshop Melbourne, Australia Jan. 30 - Feb. 1 2017 M. McDonald, University
More informationSearch for Dark Matter in the mono-x* final states with ATLAS
Search for Dark Matter in the mono-x* final states with (on behalf of the Collaboration) Rencontres de Moriond (EW) 08 *: X = jet, Z, W, H Probing Dark Matter (DM) Underlying assumption: DM has also non-gravitational
More informationSEARCH FOR INVISIBLE DECAY MODES OF THE HIGGS BOSON WITH THE ATLAS DETECTOR
SEARCH FOR INVISIBLE DECAY MODES OF THE HIGGS BOSON WITH THE ATLAS DETECTOR Monica Trovatelli (University of Victoria) on behalf of the ATLAS Collaboration HIGGS INVISIBLE DECAY SEARCHES: WHY? Standard
More informationDark matter searches and prospects at the ATLAS experiment
Dark matter searches and prospects at the ATLAS experiment Wendy Taylor (York University) for the ATLAS Collaboration TeVPA 2017 Columbus, Ohio, USA August 7-11, 2017 Dark Matter at ATLAS Use 13 TeV proton-proton
More informationnot the ATLAS Collabora<on LHC - ATLAS Dan Levin, University of Michigan on behalf of the ATLAS Collabora<on * LHCSKI 2016
* not the ATLAS Collabora
More informationDark Matter Searches in CMS. Ashok Kumar Delhi University - Delhi
Dark Matter Searches in CMS Ashok Kumar Delhi University - Delhi 28th Rencontres de Blois, Particle Physics and Cosmology! May 29 June 03, 2016 Dark Matter at LHC Benchmark Models Results at 8 TeV Mono-photon
More informationSearches for Dark Matter at the ATLAS experiment
EPJ Web of Conferences 10, 04001 (016) DOI:.1/ epjconf/0161004001 ISMD 01 Searches for Dark Matter at the ALAS experiment Henso Abreu 1 on behalf of the ALAS Collaboration a 1 echnion Israel Institute
More informationProbing Dark Matter at the LHC
July 15, 2016 PPC2016 1 Probing Dark Matter at the LHC SM SM DM DM Search for production of DM particles from interacting SM particles Models tested at ATLAS assume DM WIMP Infer DM production through
More informationDark Matter searches in ATLAS: Run 1 results and Run 2 prospects
Dark Matter searches in ATLAS: Run 1 results and Run 2 prospects Lashkar Kashif University of Wisconsin Summer School and Workshop on the Standard Model and Beyond Corfu, Greece, September 8, 2015 Outline
More informationPoS(LHCPP2013)016. Dark Matter searches at LHC. R. Bellan Università degli Studi di Torino and INFN
Dark Matter searches at LHC R. Bellan Università degli Studi di Torino and INFN E-mail: riccardo.bellan@cern.ch U. De Sanctis Università degli Studi di Udine and INFN E-mail: umberto@cern.ch The origin
More informationCristiano Alpigiani Shanghai Jiao Tong University Shanghai, 18 May 2017
Searches for dark matter in ATLAS Shanghai Jiao Tong University Shanghai, 18 May 2017 Dark Matter and Particle Physics Astrophysical evidence for the existence of dark matter! First observed by Fritz Zwicky
More informationFlorencia Canelli On behalf of the ATLAS and CMS collaborations. University of Zürich TOP2014 Cannes, France
Florencia Canelli On behalf of the ATLAS and CMS collaborations University of Zürich TOP2014 Cannes, France Prepared with help from James Ferrando from ATLAS F. Canelli, University of Zürich TOP24 2 Largest
More informationSearches for dark matter at CMS and ATLAS
Searches for dark matter at CMS and ATLAS K. Bierwagen Johannes Gutenberg University Mainz On behalf of the ATLAS and CMS Collaboration March 20, 2018 Introduction Astrophysical observations point to the
More informationSearches for New Phenomena in Events with Multiple Leptons with the ATLAS Detector
Searches for New Phenomena in Events with Multiple Leptons with the ALAS Detector ÜLİN VAROL University of Massachusetts, Amherst On Behalf of the ALAS Collaboration OULINE Introduction Excited e/μ Search
More informationGeneric Dark Matter 13 TeV. Matteo Cremonesi FNAL On behalf of the ATLAS and CMS Collaborations Moriond EWK - March 18, 2016
Generic Dark Matter Searches @ 13 TeV Matteo Cremonesi FNAL On behalf of the ATLAS and CMS Collaborations Moriond EWK - March 18, 2016 Introduction From cosmological observations, 85% of the matter comprised
More informationDark Matter in ATLAS
Dark Matter in ATLAS Silvia Resconi INFN Milano (on behalf of the ATLAS Collaboration) Ordinary Matter Dark Matter Dark Energy Rencontre de Moriond: QCD and High Energy Interactions 21st March 2016 Outline
More informationCollider Searches for Dark Matter
Collider Searches for Dark Matter AMELIA BRENNAN COEPP-CAASTRO WORKSHOP 1 ST MARCH 2013 Introduction Enough introductions to dark matter (see yesterday) Even though we don t know if DM interacts with SM,
More informationSearch for Dark Ma-er at CMS
Search for Dark Ma-er at CMS Thiago Tomei SPRACE UNESP For the CMS Collabora5on Dark Ma-er Simplified Models g c(m c ) g g DM V, A(M med ) V c(m c ) X L vector = g Zµ µ + g Zµ X L axial-vector = g Zµ µ
More informationInclusive top pair production at Tevatron and LHC in electron/muon final states
Inclusive top pair production at Tevatron and LHC in electron/muon final states Andreas Jung for the ATLAS, CDF, CMS and D Collaboration Fermilab, DAB5 - MS 357, P.O. Box 5, Batavia, IL, 651, USA DOI:
More informationATLAS Discovery Potential of the Standard Model Higgs Boson
ATLAS Discovery Potential of the Standard Model Higgs Boson Christian Weiser University of Freiburg (on behalf of the ATLAS Collaboration) 14th Lomonosov Conference on Elementary Particle Physics Moscow,
More informationPhysics at Tevatron. Koji Sato KEK Theory Meeting 2005 Particle Physics Phenomenology March 3, Contents
Physics at Tevatron Contents Koji Sato KEK Theory Meeting 5 Particle Physics Phenomenology March 3, 5 mass measurement Top physics cross section Top mass measurement SM Higgs search Tevatron Run II Started
More informationPoS(EPS-HEP2011)250. Search for Higgs to WW (lνlν, lνqq) with the ATLAS Detector. Jonas Strandberg
with the ATLAS Detector Royal Institute of Technology, KTH, Stockholm, Sweden E-mail: jostran@kth.se Higgs boson searches in the H WW ( ) lνlν (l = e, µ) and the H WW ( ) lνqq decay modes, using. fb of
More informationDark Matter Searches at CMS
Introduction 8 TeV searches TeV searches Summary and Outlook Dark Matter Searches at Fort Lauderdale, December 5 th nd 05 Michael Brodski on behalf of the Collaboration III. Physikalisches Institut A,
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 informationExotica in CMS. ICNFP 2015 Kolymbari, Crete 25 August Claudia-Elisabeth Wulz CMS Collaboration Institute of High Energy Physics, Vienna
Exotica in ICNFP 5 Kolymbari, Crete 5 August 5 Claudia-Elisabeth Wulz Collaboration Institute of High Energy Physics, Vienna Overview Selected recent results: - Dark matter searches EXO4-4, EXO-54, EXO-48,
More informationThe Compact Muon Solenoid Experiment. Conference Report. Mailing address: CMS CERN, CH-1211 GENEVA 23, Switzerland
Available on CMS information server CMS CR -017/130 The Compact Muon Solenoid Experiment Conference Report Mailing address: CMS CERN, CH11 GENEVA 3, Switzerland 08 May 017 (v3, 11 May 017) Searches for
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 informationTop properties and ttv LHC
Top properties and ttv results @ LHC Emmanuel MONNIER CPPM/IN2P3 Aix-Marseille Université (Marseille, FRANCE) On behalf of the ATLAS and CMS collaborations 15 March 2016 Moriond EW@La Thuile a Many top
More informationMeasurements of Fermionic Couplings of the Standard Model Higgs Boson using the bb, ττ and µµ Decay Channels with the ATLAS Detector
Measurements of Fermionic Couplings of the Standard Model Higgs Boson using the bb, ττ and µµ Decay Channels with the ATLAS Detector International Europhysics Conference on High Energy Physics Venice,
More informationSearch for Invisible Decay of Higgs boson at LHC
Search for Invisible Decay of Higgs boson at LHC Kajari Mazumdar Tata Institute of Fundamental Research Mumbai DHEP seminar, TIFR, Mumbai 22.4.2014 Plan of the talk Preliminaries Status of measurements
More informationTop Quark Physics at the LHC
Top Quark Physics at the LHC Ayana Arce HEP 0 Lectures #7 March 4, 203 Outline Introduction 2 Why are top quarks interesting? 3 Creating Top Quarks 4 Identifying Top Quarks 5 Some LHC results 6 Beyond
More informationNot reviewed, for internal circulation only
Searches for Dark Matter and Extra Dimensions with the ATLAS detector Shawn McKee / University of Michigan On Behalf of the ATLAS Collaboration November 21, 2013 Dark Matter Motivations Numerous astrophysical
More informationSearch for Dark Ma-er and Large Extra Dimensions in the jets+met Final State in Proton-Proton Collisions at s = 13 TeV
Search for Dark Ma-er and Large Extra Dimensions in the jets+met Final State in Proton-Proton Collisions at s = 13 TeV Emine Gurpinar (Texas Tech University) on behalf of the CMS Collaboration PPC2017,
More informationHighlights of top quark measurements in hadronic final states at ATLAS
Highlights of top quark measurements in hadronic final states at ATLAS Serena Palazzo 1,2,, on behalf of the ATLAS Collaboration 1 Università della Calabria 2 INFN Cosenza Abstract. Measurements of inclusive
More informationHiggs Results from ATLAS
Higgs Results from ATLAS Rosy Nikolaidou CEA Saclay On behalf of ATLAS collaboration Rencontres de Moriond QCD and High Energy Interac7ons La Thuile, March 5th - April st, 7 Introduction & Outline Ø After
More informationFrom the Discovery of the Higgs Boson to the Search for Dark Matter -New results from the LHC-
From the Discovery of the Higgs Boson to the Search for Dark Matter -New results from the LHC- Karl Jakobs Physikalisches Institut Universität Freiburg / Germany LHC and Data Taking, First look at the
More informationIdentification of the Higgs boson produced in association with top quark pairs in proton-proton
Identification of the Higgs boson produced in association with top quark pairs in proton-proton collision: an analysis of the final state containing three leptons with the ATLAS detector Valentina Vecchio,
More informationSearch for single production of vector-like quarks decaying into a W-boson and a b-quark at 13 TeV
Search for single production of vector-like quarks decaying into a W-boson and a b-quark at 3 TeV Dustin Biedermann Humboldt-Universität zu Berlin Top 06 Olomouc, 0th September 06 Vector-like Quarks Introduction
More informationRecent searches for new particles using 13 TeV data with ATLAS at the LHC
Recent searches for new particles using 13 TeV data with ATLAS at the LHC Vivek Jain (on behalf of the ATLAS Collaboration) State University of New York, Albany MIAMI2015 Dec 19, 2015 Beyond the Standard
More informationarxiv: v1 [hep-ex] 27 Nov 2017
CDF note 11237 November 28, 2017 Top quark properties at Tevatron arxiv:1711.09686v1 [hep-ex] 27 Nov 2017 Roman Lysák on behalf of the CDF and D0 collaborations Institute of Physics of the Czech Academy
More informationSearching for the Higgs at the Tevatron
Searching for the Higgs at the Tevatron 5 th May 2009 Particle Physics Seminar, Oxford Outline Introduction The challenges and analysis strategies Low mass SM Higgs searches High mass SM Higgs searches
More informationNon-SUSY Beyond Standard Model Searches: Recent Results from ATLAS and CMS
Journal of Physics: Conference Series PAPER OPEN ACCESS Non-SUSY Beyond Standard Model Searches: Recent Results from ATLAS and CMS To cite this article: Fairouz Malek and ATLAS and CMS Collaborations 015
More informationBoosted searches for WW/WZ resonances in
Boosted searches for WW/WZ resonances in the lνj final state BILLIE LUBIS COLUMBIA UNIVERSITY REU 2016 CERN Founded in 1954 by 12 Western European countries Now 22 member countries Aims to conduct cutting-edge
More informationPhysics at Hadron Colliders
Physics at Hadron Colliders Part 2 Standard Model Physics Test of Quantum Chromodynamics - Jet production - W/Z production - Production of Top quarks Precision measurements -W mass - Top-quark mass QCD
More informationSearch for long-lived particles at CMS. TeVPA Brian Francis for the CMS Collaboration
Search for long-lived particles at CMS TeVPA 7 Brian Francis for the CMS Collaboration Long-lived particles (LLP) at CMS Despite best efforts, no evidence yet of BSM physics at the LHC If it s not where
More informationATLAS-CONF October 15, 2010
ATLAS-CONF-2010-096 October 15, 2010 Data-driven background estimation for the H τ + τ τ h search at 7 TeV with the ATLAS detector Ian Howley 7 December 2010 1 Motivation One of the primary LHC physics
More informationThe Tevatron s Search for High Mass Higgs Bosons
The Tevatron s Search for High Mass Higgs Bosons Konstantinos A. Petridis University of Manchester On behalf of the CDF and DØ Collaborations K.A. Petridis (University of Manchester) Tevatron High Mass
More informationarxiv: v1 [hep-ex] 8 Jan 2018
Top mass measurements in ATLAS and CMS arxiv:8.239v [hep-ex] 8 Jan 28 A. CASTRO University of Bologna and INFN, Bologna, Italy On behalf of the ATLAS and CMS Collaborations Abstract Top quarks are produced
More informationLatest results on the SM Higgs boson in the WW decay channel using the ATLAS detector
Latest results on the SM iggs boson in the decay channel using the detector arxiv:188.954, accepted by PRB Claudia Bertella, on behalf of Collaboration The 4th China LC Physics Workshop (CLCP 218) 21-December-218
More informationSearch for single production of vector-like quarks decaying into a W-boson and a b-quark at 13 TeV
SNSN-33-63 November 0 06 Search for single production of vector-like quarks decaying into a W-boson and a b-quark at 3 TeV Dustin Biedermann on behalf of the ATLAS Collaboration Institut für Physik Humboldt-Universität
More informationHiggs Boson Searches at ATLAS
Higgs Boson Searches at ATLAS Jianming Qian University of Michigan October 5, 2011 Maryland/John Hopkins Joint Seminar, October 5, 2011 Jianming Qian (University of Michigan) 1 Standard Model Standard
More informationExtra dimensions and black holes at the LHC
Extra dimensions and black holes at the LHC R.M. Buckingham University of Oxford IOP half-day meeting - Black Holes, Extra Dimensions and Colliders Cavendish Laboratory, Cambridge Thursday 9th of December
More informationEarly physics with Atlas at LHC
Early physics with Atlas at LHC Bellisario Esposito (INFN-Frascati) On behalf of the Atlas Collaboration Outline Atlas Experiment Physics goals Next LHC run conditions Physics processes observable with
More informationDiscovery potential of the SM Higgs with ATLAS
Discovery potential of the SM Higgs with P. Fleischmann On behalf of the Collaboration st October Abstract The discovery potential of the Standard Model Higgs boson with the experiment at the Large Hadron
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 informationHiggs and New Physics at ATLAS and CMS
Higgs and New Physics at ATLAS and CMS F. Malek, LPSC-Grenoble for the ATLAS and CMS Collaborations 56th International Winter Meeting on Nuclear Physics 22-26 January 2018, Bormio-Italy ATLAS and CMS experiments
More informationCombined Higgs Results
Chapter 2 Combined Higgs Results This chapter presents the combined ATLAS search for the Standard Model Higgs boson. The analysis has been performed using 4.7 fb of s = 7 TeV data collected in 2, and 5.8
More informationSearch for H ± and H ±± to other states than τ had ν in ATLAS
Search for H ± and H to other states than τ had ν in On behalf of the collaboration Louisiana Tech University E-mail: Catrin.Bernius@cern.ch esults of searches for charged Higgs bosons based on data from
More informationCollider searches for dark matter. Joachim Kopp. SLAC, October 5, Fermilab
Collider searches for dark matter Joachim Kopp SLAC, October 5, 2011 Fermilab based on work done in collaboration with Patrick Fox, Roni Harnik, Yuhsin Tsai Joachim Kopp Collider searches for dark matter
More informationSearches for New Physics
Searches for New Physics (Non-SUSY) Gustaaf Brooijmans For the ATLAS, CDF and CMS Collaborations Rencontres du Vietnam 013, ICISE Inaugural Conference 1 Outline There is a Higgs! Are we done? New Physics
More informationHiggs search in WW * and ZZ *
Higgs search in WW * and ZZ * Emanuele Di Marco on behalf of CMS collaboration La Sapienza Università di Roma & INFN Roma1 July, 29 2011 1 Higgs production at LHC gluon fusion (gg H) gg H is the dominant
More informationOn behalf of the ATLAS and CMS Collaborations
On behalf of the ATLAS and CMS Collaborations Reza Goldouzian Université libre de Bruxelles 1 Ø There are several models of physics beyond the standard model require new particles that couple to quarks
More informationUn-ki Yang. Seoul National University. WIN 2015, June 8-13, 2015, MPIK Heidelberg, On behalf of the ATLAS and CMS collaborations
Un-ki Yang Seoul National University On behalf of the ATLAS and CMS collaborations! WIN 2015, June 8-13, 2015, MPIK Heidelberg,! ! Small neutrino mass " heavy neutrino (N R ) by SeaSaw! Type I : weak-singlet
More informationSearch for a new spin-zero resonance in diboson channels at 13 TeV with the CMS experiment
Search for a new spin-zero resonance in diboson channels at 3 TeV with the experiment Universite Catholique de Louvain (UCL) (BE) E-mail: alessio.magitteri@cern.ch On behalf of the Collaboration Searches
More informationSearches for Dark Matter with in Events with Hadronic Activity
Searches for Dark Matter with in Events with Hadronic Activity Gabriele Chiodini, On behalf of the ATLAS Collaboration. INFN sezione di Lecce, via Arnesano 73100 Lecce - Italy ATL-PHYS-PROC-2017-176 02
More informationP-P PHYSICS AT LHC. W and Z produc1on. Data and MC comparison. Lecture 4
P-P PHYSICS A LHC W and Z producon. Data and MC comparison Lecture 4 RIGGER URN ON rigger Efficiency 0.8 0.6 CMS preliminary, nb 8 67 y < 0.5 s = 7 ev 0 0.4 0. 0 MinBias Jet6u Jet5u Jet0u Anti-k R=0.5
More informationHunting the Invisible -- Searches for Dark Matter at the LHC
Hunting the Invisible -- Searches for Dark Matter at the LHC Kerstin Hoepfner, RWTH Aachen, III. Phys. Inst. A DESY Seminar February 11 th 2014 1 Outline 1. Signatures of Dark Matter at the LHC 2. Detection
More informationThe W-mass Measurement at CDF
2010-05 - 10 The W-mass Measurement at CDF Ilija Bizjak, University College London 1/33 Outline 1) Motivation for a W mass measurement Implications for the EW constraints on Higgs mass 2) Measurement of
More informationRecent ATLAS measurements in Higgs to diboson channels
Recent ATLAS measurements in Higgs to diboson channels Yusheng Wu University of Michigan Institute of Physics, Academia Sinica On behalf of the ATLAS collaboration August 31 st - Higgs Hunting 2016 Introduction
More informationDiscussion of QCD aspects of multi boson production measured with the ATLAS detector
Discussion of QCD aspects of multi boson production measured with the ATLAS detector Dimos Sampsonidis Aristotle University of Thessaloniki On behalf of the ATLAS Collaboration Low-x Meeting 2016, 6-11
More informationRecent Results on New Phenomena and Higgs Searches at DZERO
Recent Results on New Phenomena and Higgs Searches at DZERO Neeti Parashar Louisiana Tech University Ruston, Louisiana U.S.A. 1 Outline Motivation for DØ Run II Detector at Fermilab The Fermilab Tevatron
More informationSearch for a Standard Model Higgs boson in the H ZZ ( ) * decay channel with the ATLAS Experiment at CERN
Search for a Standard Model Higgs boson in the H ZZ ( ) * 4l decay channel with the ATLAS Experiment at CERN Giacomo Artoni Seminario Finale Dottorato XXV Ciclo 5// Thesis Advisor: Prof. Carlo Dionisi
More informationStudy of Higgs boson production in the WW decay channel at the LHC
Study of iggs boson production in the decay channel at the LC Tatjana Lenz on behalf of the and CMS collaborations.8.3 Rencontres du Vietnam Introduction n th July - the discovery of a new particle n and
More informationarxiv: v1 [hep-ex] 7 Jan 2019
Top quarks and exotics at ATLAS and CMS Leonid Serkin on behalf of the ATLAS and CMS Collaborations 1 arxiv:1901.01765v1 [hep-ex] 7 Jan 2019 INFN Gruppo Collegato di Udine, Sezione di Trieste, Udine and
More informationSearch for the Higgs boson in the t th production mode using the ATLAS detector
Search for the Higgs boson in the t th production mode using the ATLAS detector Rustem Ospanov (University of Pennsylvania) on behalf of the ATLAS collaboration Large Hadron Collider Physics Conference,
More informationElectroweak results. Luca Lista. INFN - Napoli. LHC Physics
Electroweak results Luca Lista INFN - Napoli EWK processes at LHC p p W and Z production in pp collisions proceeds mainly form the scattering of a valence quark with a sea anti-quark The involved parton
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 informationPreparations for SUSY searches at the LHC
Preparations for SUSY searches at the LHC Alex Tapper UK HEP Forum: LHC First Results and Outlook, September 20-21 20. Outline Search strategy Examples with 70 nb -1 Hadronic searches Leptonic searches
More informationAccelerator searches for new physics in the context of dark matter
Journal of Physics: Conference Series PAPER OPEN ACCESS Accelerator searches for new physics in the context of dark matter To cite this article: Steven Lowette 06 J. Phys.: Conf. Ser. 78 00 View the article
More informationPhysics with Tau Lepton Final States in ATLAS. Felix Friedrich on behalf of the ATLAS Collaboration
Physics with Tau Lepton Final States in ATLAS on behalf of the ATLAS Collaboration HEP 2012, Valparaiso (Chile), 06.01.2012 The Tau Lepton m τ = 1.8 GeV, heaviest lepton cτ = 87 μm, short lifetime hadronic
More informationHiggs Boson Searches in ATLAS
Higgs Boson Searches in ATLAS Wolfgang F. Mader Institut für Kern- und Teilchenphysik TU Dresden Fourth fermion generation and single-top production 202 26-28 March 202 Leinsweiler, Pfalz, Germany Wolfgang
More informationDmitri Sidorov Oklahoma State University On behalf of the ATLAS Collaboration DIS2014, 04/28/2014
Dmitri Sidorov Oklahoma State University On behalf of the ATLAS Collaboration DIS4, 4/8/4 Introduc)on We discovered a Standard Model (SM) like Higgs boson at mh=5 GeV. This is not the end of the story.
More informationFrom ZZ 4l to Vector Boson Scattering at LHC
From ZZ 4l to Vector Boson Scattering at LHC Linda Finco Supervisor: Nicola Amapane Second Year Seminar Outline LHC and the CMS Experiment VBS: theoretic introduction and motivations ZZ+2jets Channel ZZ
More informationarxiv: v1 [hep-ex] 8 Nov 2010
Searches for Physics Beyond the Standard Model at CMS Sung-Won Lee, on behalf of the CMS Collaboration Texas Tech University, Lubbock, TX 799, USA Recent results on searches for physics beyond the Standard
More informationPoS(DIS 2010)190. Diboson production at CMS
(on behalf of the CMS collaboration) INFN-Napoli & University of Basilicata E-mail: fabozzi@na.infn.it We present an analysis strategy based on Monte Carlo simulations for measuring the WW and WZ production
More informationHiggs boson measurements at ATLAS
Higgs boson measurements at On behalf of the Collaboration Oxford University E-mail: chris.hays@physics.ox.ac.uk A comprehensive set of Higgs boson measurements has been performed in pp collisions produced
More informationATLAS Run II Exotics Results. V.Maleev (Petersburg Nucleare Physics Institute) on behalf of ATLAS collaboration
ATLAS Run II Exotics Results V.Maleev (Petersburg Nucleare Physics Institute) on behalf of ATLAS collaboration What is the dark matter? Is the Higgs boson solely responsible for electroweak symmetry breaking
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 informationHiggs-related SM Measurements at ATLAS
Higgs-related SM Measurements at ATLAS Junjie Zhu University of Michigan 2 nd MCTP Spring Symposium on Higgs Boson Physics Outline Introduction Isolated γγ cross section (37 pb -1, Phys. Rev. D 85, 012003
More informationHIGGS Bosons at the LHC
ATLAS HIGGS Bosons at the LHC Standard Model Higgs Boson - Search for a light Higgs at the LHC - Vector boson fusion - Comparison to the Tevatron potential Measurement of Higgs boson parameters The MSSM
More informationWZ di-boson production at CMS
WZ di-boson production at CMS 1 Outline Physics motivations Existing results (Tevatron s = 1.96TeV) Existing prospects for CMS at s = 14TeV Preliminary prospects for CMS at s = 7TeV 2 WZ Physics motivation
More informationRare and Exotic Decays of Higgs boson
Rare and Exotic Decays of Higgs boson Kajari Mazumdar Tata Institute of Fundamental Research Mumbai Plan of talk Status of measurements for standard model Higgs boson Example of a rare decay Search for
More informationPreparations for SUSY searches at the LHC
Preparations for SUSY searches at the LHC Alex Tapper UK HEP Forum: LHC First Results and Outlook, September 20-21 20. Outline Search strategy Examples with 70 nb Hadronic searches Leptonic searches (single
More informationSEARCH FOR 4 TH GENERATION QUARKS AT CMS
SEARCH FOR 4 TH GENERATION QUARKS AT CMS Kai-Feng Chen National Taiwan University LHC symposium in PSROC annual meeting January 6 th 0, National Normal University, Taipei 4TH GENERATIONS: WHY? WHY NOT?
More informationEvidence for Higgs Boson Decays to a Pair of τ-leptons
Evidence for Higgs Boson Decays to a Pair of τ-leptons ET miss = 119 GeV μ (pt=6 GeV) τhad (pt=96 GeV) mττ =19 GeV Nils Ruthmann mjj =65 GeV Nils Ruthmann (Universität Freiburg) On Behalf of the ATLAS
More informationPoS(EPS-HEP 2013)215. WW, WZ, and ZZ production at CMS. Jordi DUARTE CAMPDERROS (on behalf of CMS collaboration)
(on behalf of CMS collaboration) Universidad de Cantabria/CSIC E-mail: jorge.duarte.campderros@cern.ch We present the WW, WZ and ZZ production cross sections measurements and constraints on anomalous triple-gauge
More informationNonthermal Dark Matter & Top polarization at Collider
Nonthermal Dark Matter & Top polarization at Collider Yu Gao Texas A&M University R.Allahverdi, M. Dalchenko, B.Dutta, YG, T. Kamon, in progress B. Dutta, YG, T. Kamon, arxiv: PRD 89 (2014) 9, 096009 R.
More informationSearches for New Physics with Tau Leptons at the ATLAS Detector. Katharine Leney University of the Witwatersrand
Searches for New Physics with Tau Leptons at the ATLAS Detector Katharine Leney University of the Witwatersrand Overview Introduction: ATLAS and the LHC The Standard Model and beyond Tau leptons ATLAS
More information