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and none pass the jet pT requirements. The resulting exclusion regions at 95% C.L. in the mSUGRA framework are shown in Figure 1, and are highly compatible with previous limits from the Tevatron. [GeV] 1/2 m 320 300 280 260 240 220 200 180 160 140 int -1 MSUGRA/CMSSM: tan β = 3, A = 0, µ >0 L = 34 pb , s=7 TeV 0 ATLAS Preliminary multilepton ~ q (600 GeV) ~ g (600 GeV) ~ g (500 GeV) Observed limit 95% CL Median expected limit ~ ± LEP2 l ± LEP2 χ ∼ 1 0 χ 2 ∼ ± D0 χ ∼ , 1 -1 D0 ~ g, ~ q, µ 0. The top left plot is from the 0-lepton analysis, the top right plot from the 1-lepton, the bottom left from the 2-lepton, and the bottom right for the multi-lepton analysis. 6 Searches for supersymmetry in final states with b-jets and missing transverse energy Depending on the value of tan β, the ratio of vacuum expectation values for the two Higgs doublets, the production of third generation squarks could be favoured at the LHC. It can therefore be advantageous to search for final states containg b−jets. Separate searches 11 are performed for final states with and without high-pT leptons. In both cases, at least one jet is required to be b-tagged, using the SV0 algorithm 12 , that selects tracks from a secondary vertex that are associated with the jet. The principal background is from tt events. Data-driven methods are used to estimate the QCD, W plus jets, and tt backgrounds. No excess of events is observed above the Standard Model expectation in the signal region. The zero-lepton (onelepton) results can be interpreted in R-parity conserving models where sbottoms (stops) are the only squarks in the gluino decay cascade, gluino masses below 590 GeV (500 GeV) are excluded at the 95% C.L., as shown in Figure 2.
Figure 2: The top left plot shows the dilepton invariant mass spectra for oppositely signed same-flavour and opposite-flavour lepton pairs, weighted according to efficiency and acceptance correction factors, from the flavour subtraction analysis. The top right plot shows the exclusion limits on the mSUGRA m0.m1/2 plane, with high tan β, from both b-jets analyses. The lower right plot shows the 95% C.L. exclusion region on the m˜ b vs m˜g plane from the zero-lepton plus b-jets SUSY search, while the right plot shows the result of the one-lepton plus b-jets search on the m˜t vs m˜g plane.
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2011 QCD and High Energy Interactio
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Proceedings of the XLVIth RENCONTRE
Page 5 and 6: 2011 RENCONTRES DE MORIOND The XLVI
Page 7 and 8: Foreword Contents 1. Higgs Searches
Page 9: 1. Higgs
Page 12 and 13: 95% CL Limit/SM 10 1 Tevatron Run I
Page 14 and 15: Events/5 GeV 6 10 5 10 4 10 3 10 2
Page 16 and 17: Events / 0.5 CDF Run II Preliminary
Page 18 and 19: For the most sensitive sub-channel
Page 20 and 21: Table 1: Table listing the various
Page 22 and 23: various SM Higgs mass hypotheses. T
Page 24 and 25: constraints on parameters are given
Page 26 and 27: Figure 2: Invariant mass of the ele
Page 28 and 29: Figure 4: CDF Exclusion limits for
Page 30 and 31: Table 1: Main phases of 2010 commis
Page 32 and 33: Table 4: Parameter list for early (
Page 34 and 35: luminosity of 1.2×10 33 cm −2 s
Page 36 and 37: 2 QCD Analysis settings HERA PDFs a
Page 38 and 39: min 2 - 2 20 15 10 5 0 H1 and ZEUS
Page 40 and 41: SM σ / σ 95% CL Limit on 3 10 2 1
Page 42 and 43: NNLO σ/ σSM 95% CL Upper Bound on
Page 44 and 45: the report of this working group. I
Page 46 and 47: 2.3 The impact of different PDF par
Page 49 and 50: SUSY Searches at the Tevatron Ph. G
Page 51 and 52: on the quality (loose or tight) and
Page 53 and 54: SUSY searches at ATLAS N. Barlow, o
Page 55: channel. These results are combined
Page 59: 2010 data. Analysis techniques for
Page 62 and 63: as main discriminator between event
Page 64 and 65: sign leptons is particularly intere
Page 66 and 67: N of events 5 10 DATA 10 4 3 10 10
Page 68 and 69: ) [pb] ν e → B(W’ × σ 10 1 -
Page 70 and 71: 2 Searches in the dijet final state
Page 72 and 73: ing that the neutrinos were the onl
Page 75 and 76: The Quasi-Classical Model in SU(N)
Page 77 and 78: g (γ µ kµ) γ µ Aa µ g (pk)
Page 79: 3. Top
Page 82 and 83: of their vertex with respect to the
Page 84 and 85: of about 9%. 3.1 Differential Cross
Page 86 and 87: Figure 5: Summary of most recent CD
Page 88 and 89: the minimum number of jets identifi
Page 90 and 91: where f’s are probability functio
Page 92 and 93: hood technique, with a simultaneous
Page 94 and 95: momentum direction of the b quark f
Page 96 and 97: Events 200 150 100 50 -1 DØ L=5.4
Page 98 and 99: after all corrections in the M t¯t
Page 100 and 101: for prompt J/ψ under the fully tra
Page 102 and 103: 2 Events / 20 MeV/c 50 40 30 20 10
Page 104 and 105: ATLAS - consists of four parts (mon
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5 D mesons High cross-sections of D
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μ +X') [nb/GeV] → b+X → (pp T
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GeV) μ |
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HEAVY FLAVOUR IN A NUTSHELL Robert
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Figure 1: Overlapping constraints o
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Figure 3: Constraints on new physic
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RECENT B PHYSICS RESULTS FROM THE T
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(IP) distributions are fitted separ
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decays CDF extracts Using a 5.94 fb
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Search for B 0 s → µ+ µ − and
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Ref. 10,11 . The expected GL distri
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IN PURSUIT OF NEW PHYSICS WITH B DE
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τK + K −/τBs 1.01 1.00 0.99 0.9
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CHARMLESS HADRONIC B-DECAYS AT BABA
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surements (fL ∼ 0.5). Several att
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Estimating the Higher Order Hadroni
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the resulting exponent suggests to
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The counterpart of the ground-state
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(a) Tree level signal decay b ¯Bs
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the B0 d system LHCb profits from i
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This result is based on averaging o
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y non-perturbative effects. Using t
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e M(Dπ) distributions obtained D +
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CHARM PHYSICS RESULTS AND PROSPECTS
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LHCb is working towards its first m
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Two body hadronic D decays Yu Fushe
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where the effective coefficients aA
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6. J. J. Sakurai, Phys. Rev. 156, 1
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states: 6π, 2K4π, 4K2π, KSK3π 1
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egion of X(3872), which corresponds
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Figure 1: The π 0 recoil mass spec
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η → π + π − π 0 η ′ →
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conservation. This second principle
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many of them come from gluon nonper
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Latest Jets Results from the Tevatr
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in for the inclusive trijet event s
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RECENT RESULTS ON JETS FROM CMS F.
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dy (pb/GeV) /dp 2 d 10 10 10 9 10
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RECENT RESULTS ON JETS WITH ATLAS G
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| y| < 0.3 ATLAS Preliminary 2.1 <
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EPOS 2 and LHC Results TanguyPierog
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positions are randomly distributed
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ABOUT THE HELIX STRUCTURE OF THE LU
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Figure 2: Left: Correlations betwee
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Improving NLO-parton shower matched
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due to the inclusion of higher orde
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New Results in Soft Gluon Physics C
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Figure 2: Spacetime depiction of Dr
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Central Exclusive Meson Pair Produc
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in the CEP cross section. However i
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AN AVERAGE b-QUARK FRAGMENTATION FU
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1/N dN/dx 3.5 3 2.5 2 1.5 1 0.5 ALE
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W + W + jj at NLO in QCD: an exotic
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Σ fb Σ fb 3.5 3.0 2.5 2.0 0.65 0.
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W/Z+Jets and W/Z+HF Production at t
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Figure 2: Measured inclusive jet di
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W and Z physics with the ATLAS dete
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SHERPA 9 MC generators but not by P
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W/Z + Jets results from CMS V. CIUL
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Events / 0.1 600 500 400 300 200 10
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TEVATRON RESULTS ON MULTI-PARTON IN
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iterative midpoint cone algorithm w
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INVESTIGATIONS OF DOUBLE PARTON SCA
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¦ § ¦ ¨ ¥ ¦ ¨ § ¦ © ¦ §
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Figure 4: Two-dimensional distribut
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SOFT QCD RESULTS FROM ATLAS AND CMS
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as a function of multiplicity for t
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Determination of αS using hadronic
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α S (m Z 0) 0.15 0.14 0.13 0.12 0.
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Reaching beyond NLO in processes wi
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dσ/dp t,max [fb/GeV] 10 5 10 4 10
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Nonlocal Condensate Model for QCD S
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The lower bound for the integration
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AN ALTERNATIVE SUBTRACTION SCHEME F
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where MBorn,g is the underlying Bor
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THE NNPDF2.1 PARTON SET F. CERUTTI
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ottom masses mb of 4.25, 4.5, 5.0 a
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HOLOGRAPHIC DESCRIPTION OF HADRONS
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∫ SYM = κ d 4 ( 1 xdzTr 2 h(z)F
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Nuclear matter and chiral phase tra
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fact that for Nc ≫ 3 a gas of fre
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Recent Results on Light Hadron Spec
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Figure 3: Mass spectrum fitting wit
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MEASUREMENT OF THE J/ψ INCLUSIVE P
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2 Counts per 40 MeV/c 120 100 80 60
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STUDY OF Ke4 DECAYS IN THE NA48/2 E
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photons were accepted while particl
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6. Structure Functions Diffraction
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2 Hadronic Final States and Diffrac
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3 Summary A brief overview of recen
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Using HERA Data to Determine the In
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k f n 0.4 0.2 0 -0.2 0.4 0.2 0 -0.2
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The singular term, on the other han
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Pomeron Kernel: The leading order B
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DIFFRACTION, SATURATION AND pp CROS
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In Ref. 6 , the saturated Froissart
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Transverse Energy Flow with Forward
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1/N d dE t /dη 0.1 0.09 0.08 0.07
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7. Heavy Ions
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dη)/(0.5〈 N 〉 ) part ch (dN 10
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) 3 (fm long R side R out R 400 350
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correlation density is computed as
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Away-side gaussian width 1.4 1.2 1
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Figure 1: (a) J/ψ rapidity distrib
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lower x, or forward rapidity one ex
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φ ∆ /d assoc dN trig 1/N 0.5 0.4
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AA,Pythia I 2.5 2.0 1.5 1.0 0.5 0.0
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(1/N ) dN/dA evt J φ Δ ) dN/d (1/
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[GeV] Tower ET Σ 50 45 40 35 30 25
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3 Results 3.1 Dijet Properties in p
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(GeV/c) (GeV/c) T T p < 40 20
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wheredσm(N +N → h+X)/dp Tdy isth
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R AA 0.6 0.5 0.4 0.3 0.2 0.1 0 0.5
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Here D is the diffusion coefficient
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The effect of triangular flow in je
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When both trigger and associated pa
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The first Z boson measurement in th
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Figure 1: Dimuon invariant mass spe
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2. V. Kartvelishvili, R. Kvatadze a
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esolution [ µ m] ! r 0 d 300 250 2
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Figure 5: Differential transverse m
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Figure 1: Average nuclear modificat
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Another way of using direct photons
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Pb R g 2 Nuclear Modifications for
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q T 1/R AA 1.6 1.4 1.2 1 0.8 LO Fra
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] 2 > [g/cm max
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Methods (a) and (c) constrain the e
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EXPERIMENTAL SUMMARY: ENTERING THE
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ut also for valence quarks involved
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The sensitivity to Standard Model H
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Figure 10: Top pair mass spectrum m
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Figure 13: Particle densities (left
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4 Low energy precision Spectroscopy
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asymmetries associated to Bd and Bs
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XLVIth Rencontres de Moriond QCD an
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