Thanks to ATLAS and CMS (Plots are from both) SLAC Ian Hinchliffe 07/24/06 1
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1 Thanks to ATLAS and CMS (Plots are from both) SLAC Ian Hinchliffe 07/24/06 1
2 Delays, delays... SLAC Ian Hinchliffe 07/24/06 2
3 Physics marched on... Individual lepton number not conserved Dark matter/energy No big surprises but a huge achievement for both theory and experiment Unexpected, don't fit comfortably in Standard Model SLAC Ian Hinchliffe 07/24/06 3
4 Where does the mass come from? Does the d***d Higgs exist? What is really beyond Standard model?? Does it have anything to do with Dark Matter?? SLAC Ian Hinchliffe 07/24/06 4
5 We looked for this Holy Grail... SLAC Ian Hinchliffe 07/24/06 5
6 LHC status SLAC Ian Hinchliffe 07/24/06 6
7 LHC status SLAC Ian Hinchliffe 07/24/06 7
8 Standard model SLAC Ian Hinchliffe 07/24/06 8
9 Dashboard (1) SLAC Ian Hinchliffe 07/24/06 9
10 Dashboard (2) Last years panic! SLAC Ian Hinchliffe 07/24/06 10
11 Dashboard (3) SLAC Ian Hinchliffe 07/24/06 11
12 SLAC Ian Hinchliffe 07/24/06 12
13 Schedule Sectors 7-8 and 8-1 will be fully commissioned up to 7 TeV in If we continue to commission the other sectors up to 7 TeV, we will not get circulating beam in The other sectors will be commissioned up to the field needed for de- Gaussing. Initial operation will be at 900 GeV (CM) with a static machine (no ramp, no squeeze) to debug machine and detectors. Full commissioning up to7 TeV will be done in the winter 2008 shutdown From J Engelen, CERN SLAC Ian Hinchliffe 07/24/06 13
14 Translation? Low luminosity at 900 GeV at end 2007: Start debugging detectors Some months at beginning of 2008 to commission remaining LHC components 14 TeV Physics run in Significant luminosity is expected Low luminosity achieved (2 10**33) Operation in this mode Ramp up to full luminosity in 2010? A straw man run plan is shown on next page SLAC Ian Hinchliffe 07/24/06 14
15 From R Bailey, predates recent delay SLAC Ian Hinchliffe 07/24/06 15
16 SLAC Ian Hinchliffe 07/24/06 16
17 CMS SUPERCONDUCTING COIL ECAL Scintillating PbWO4 crystals HCAL Plastic scintillator/brass sandwich IRON YOKE TRACKER Silicon Microstrips Pixels Total weight : 12,500 t Overall diameter : 15 m Overall length : 21.6 m Magnetic field : 4 Tesla 3 g/cm 3 MUON BARREL Drift Tube Chambers Resistive Plate Chambers MUON ENDCAPS Cathode Strip Chambers Resistive Plate Chambers SLAC Ian Hinchliffe 07/24/06 17
18 Magnet Test and Detector Test - Jul-Aug06 HCAL Endcap CSCs SLAC Ian Hinchliffe 07/24/06 18
19 CMS status The 4 Tesla s.c. coil is now cold, at liquid He temperature 4.5K. Tracker assembly progressing well. All parts (~220 m 2 of Si sensors) expected to be installed in Support Tube (by end06) for final commissioning and then transport to Point 5. TIB/TID+ Delivered to CERN on 14 June 83% of barrel crystals delivered. 27/36 bare Supermodules (1700 xtals) assembled. First half barrel integrated with electronics. Instal 30 SM into HB before lowering. Endcap ECAL will be installed for 2008 physics run. Over 3 out of 5 wheels worth of DT/RPC packages installed. > 90% of CSCs installed on endcap disks. Half of endcap RPCs installed. Commissioning with cosmics of large sub-parts (systems tests) has started. Cosmics have been recorded for all sub-detectors: TK, ECAL, HCAL and Muon system. Test a full slice of CMS in July-Sep 06. Start lowering disks and wheels in Oct06. Engelen, Dobrzynski Beam pipe in place by 31 Aug 2007 and ready to close for pilot physics run. SLAC Ian Hinchliffe 07/24/06 19
20 CMS status (3) SLAC Ian Hinchliffe 07/24/06 20
21 ATLAS Closed ready for beam in August P Jenni SLAC Ian Hinchliffe 07/24/06 21
22 ATLAS SLAC Ian Hinchliffe 07/24/06 22
23 ATLAS schedule SLAC Ian Hinchliffe 07/24/06 23
24 T1: 3.1 < h < 4.7 T2: 5.3 < h < 6.5 SLAC Ian Hinchliffe 07/24/06 24
25 LHCb SLAC Ian Hinchliffe 07/24/06 25
26 LHCb SLAC Ian Hinchliffe 07/24/06 26
27 LHCb installation SLAC Ian Hinchliffe 07/24/06 27
28 ALICE SLAC Ian Hinchliffe 07/24/06 28
29 ALICE SLAC Ian Hinchliffe 07/24/06 29
30 ALICE µ SLAC Ian Hinchliffe 07/24/06 30
31 Process (nb) Ns -1 L=10pb -1 L=10fb -1 Minimum bias Inclusive jets p T >200GeV ~10 15 ~10 9 ~10 8 W ee ~10 7 Z e + e Dibosons SLAC Ian Hinchliffe 07/24/06 31
32 SLAC Ian Hinchliffe 07/24/06 32
33 Data taking efficiency of 30% included. Efficiency of all analysis cuts included. P. Jenni s talk (July 10 th ) W eν Z ee µ µ SLAC Ian Hinchliffe 07/24/06 33
34 Minbias at 900 GeV SLAC Ian Hinchliffe 07/24/06 34
35 Underlying event at 900 GeV SLAC Ian Hinchliffe 07/24/06 35
36 Standard model min bias Soft Tracks do not make it to calorimeter dn ch /dp T dn ch Reconstruct tracks with: 1) pt>500mev 2) d 0 < 1mm 3) # B-layer hits >= 1 4) # precision hits >= 8 ATLAS p T (MeV) 50 MeV tracks: reach all Pixel layers 150 MeV tracks: reach last SCT layer 400 MeV tracks: reach end of TRT CMS has smaller radius, higher field SLAC Ian Hinchliffe 07/24/06 36
37 Jets SLAC Ian Hinchliffe 07/24/06 37
38 Dijet phi correlations Data from D0 compared to MC decorrelation should increase at large rapidity separation This should be early LHC result SLAC Ian Hinchliffe 07/24/06 38
39 Standard model W/Z ~10 pb -1 1 month at and < 2 weeks at 10 31, ε=50% 100 pb -1 few days at 10 32, ε=50% SLAC Ian Hinchliffe 07/24/06 39
40 Measuring Z rates Need to trigger on either e or mu Use mass constraint to calibrate both Measure track effic by starting with good e and e-m energy Measure trigger effic by comparing to offline Very rapidly reach systematic limit on cross-section = ε = σ ε ε ε Zee = 1.87nb L = A Z x Z 12% 87% R 2.2 mhz Zee 31 cm -2 s - 12% (acceptance X reconst. eff.) 87% (HLT single electron efficiency) Statistical uncertainty 20% 10% 5% 2% 1% Time 87% 20 min 72 min 5 hours 30 hours 5 days S. Jézéquel, SM meeting March 2006 Time 60% 2 hours 8.3 hours 33 hours 8.6 days 34 days SLAC Ian Hinchliffe 07/24/06 40
41 PDF's are constrained by data Grids were generated for the inclusive jet cross-section at ATLAS in the pseudorapidity ranges 0<<1, <1, 1<<2, <2, and 2<<3 <3 up to p T =3TeV (NLOJET). In addition pseudo-data for the same process was generated using JETRAD. The pseudo-data was then used in a global (ZEUS) fit to assess the impact of ATLAS data on constraining PDFs: Preliminary indications suggest that ATLAS data can constrain the high x-gluon. Systematic errors are uncorrelated, 10fb -1 =1 year of nominal data- taking SLAC Ian Hinchliffe 07/24/06 41
42 PDF uncertainties + + ν ν Large rapidity is sensitive to quarks at large x. Less well measured now CTEQ61 MRST02 ZEUS02 CTEQ61 MRST02 ZEUS02 SLAC Ian Hinchliffe 07/24/06 42
43 W/Z pairs CMS 1 inverse fb SLAC Ian Hinchliffe 07/24/06 43
44 Top Strong Interaction tt LHC Tevatron ~850 pb ~7 pb 10% qq, 90% gg 85% qq, 15% gg 1.8 Hz at low luminosity SLAC Ian Hinchliffe 07/24/06 44
45 Top Very low background with everything working 1 lepton, missing Et, two identified b-jets L (few cm -2 s -1 ) SLAC Ian Hinchliffe 07/24/06 45
46 Top w/o btag 4 jets p T > 40 GeV Isolated lepton p T > 20 GeV trigger 3 jets with highest p T NO b-tag!! L ( cm -2 s -1 ) p T miss > 20 GeV SLAC Ian Hinchliffe 07/24/06 46
47 Bottom and Charm TeV µb GeV µb σ 70 mb 40 mb µ6(5) 4000 nb 60 nb µ6(5) µ3 200 nb 2 nb ψ ( µ6(5) µ3 ) X 7 nb 0.1 nb ψ ( µ6(5) µ3 ) X 28 nb 1 nb ϒ ( µ6(5) µ3 ) 9 nb 1.7 nb *) pt cuts for 14TeV are µ6 µ3 and for 900 GeV µ5µ3 For both muons η <2.5 SLAC Ian Hinchliffe 07/24/06 47
48 Bs to mu mu Less advantage over Tevatron because cross section rises slowly Integral LHC Luminosity 100 pb -1 Signal ev. after ~ 0 cuts BG ev. after cuts ~ 0.2 ATLAS upper limit at 90% CDF&D0 upper limit at 90% CL 10 fb -1 ~ 7 ~ fb -1 ~ 21 ~ ATLAS SLAC Ian Hinchliffe 07/24/06 48
49 Easy new physics:z primes Follow the dilepton invarient mass from Z upwards 100 inverse picobarns SLAC Ian Hinchliffe 07/24/06 49
50 Easy new physics:z primes The CMATLAS experiment operating at LHC has observed 4 dimuon and two dielectron events where the invariant mass if the lepton pair is between 1.13 and 1.15 TeV. No other events withi invarient mass above 900 GeV have been seen. These events are consistent with the production and decay of a heavy particle of mass 1.14 TeV and an effective production cross section of aaa pb. Such an effect could be production of a Z', Kaluza Klein gravition. SLAC Ian Hinchliffe 07/24/06 50
51 Z prime; type Is it spin 1 or spin 2? Look at angular dist This comes later! CMS SLAC Ian Hinchliffe 07/24/06 51
52 Extra dimension resonance Gluon excitation decaying to ttbar ATLAS SLAC Ian Hinchliffe 07/24/06 52
53 Distinguishing features Sensitivity Dominated by Theoretical uncertainty High Multiplicity High E T High Sphericity High Missing P T Democratic Decay ATLAS SLAC Ian Hinchliffe 07/24/06 53
54 Techicolor ( rumors of my death are greatly exaggerated ) TechiRho to WZ 3 lepton final state Clean CMS Not very likely in my opinion (therefore a good chance to be seen??) SLAC Ian Hinchliffe 07/24/06 54
55 W' 3 inverse fm: S/B=93/31 CMS (Kreuzer) SLAC Ian Hinchliffe 07/24/06 55
56 SUSY This is not evidence... SLAC Ian Hinchliffe 07/24/06 56
57 Susy 2.2fb -1 This would be much better but its still not SUSY... SLAC Ian Hinchliffe 07/24/06 57
58 New phyiscs The CMATLAS experiment operating at LHC has observed an excess of 9 dimuon and 11 dielectron events in events selected to have 4 jets with pt>50 GeV. The invariant mass if the lepton pair is below 109 GeV and has no peak. These events are inconsistent with the standard model expecation of 2 events. They are consistent with the cascade decay of a two or more new particles. This signal could due for example, to SUSY or UED. SLAC Ian Hinchliffe 07/24/06 58
59 Susy vs UED? Much theoretical angst over this problem This is a problem that we need to keep us all busy!! SLAC Ian Hinchliffe 07/24/06 59
60 σ SLAC Ian Hinchliffe 07/24/06 60
61 Same way they always have!! We all expect/hope that LHC will revolutionize field. Recall J/Psi, charm, tau... I was in high school the last time we had a comparable leap in effective energy: DONT BLOW IT! SLAC Ian Hinchliffe 07/24/06 61
62 But we hope for something more revolutionary Come back for the 2010/2011 school when one of you will be showing real LHC data SLAC Ian Hinchliffe 07/24/06 62
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