Latest ATLAS results from Run 2

Transcription

1 SNSN December 6, 206 Latest ATLAS results from Run 2 Claudia Gemme Istituto Nazionale di Fisica Nucleare Genova, ITALY on behalf of the ATLAS Collaboration ATL-PHYS-PROC /2/206 After the first LHC long shutdown with upgrades to the machine and the detectors, since 205 the ATLAS experiment recorded more than 30 fb of integrated luminosity of pp collision data at 3 TeV centreof-mass energy. The data collected to date, the detector and physics performance, and measurements of Standard Model processes are reviewed briefly before summarising the latest ATLAS results in the Brout- Englert- Higgs sector, where substantial progress has been made since the discovery. Searches for physics phenomena beyond the Standard Model are also summarized. These proceedings reflect only a brief summary of the material presented at the conference. PRESENTED AT 9th International Worshop on top quark physics Olomouc, Czech Republic, September 9 23, 206

2 Introduction After the first succesful data taking period in (Run ), the ATLAS detector [] has been significantly improved during the LHC long shutdown in with a new beam pipe and a 4th silicon pixel layer (IBL) at 3.3 cm from the interaction point; improvements in the magnetic and cryogenic systems; consolidation and repairs of all subsdetectors; upgrade in the trigger and data acquisistion systems increasing the maximum first level hardware rate from 75 khz to 0 khz and merging the two software trigger levels. The ATLAS experiment has had a successful start of pp data taking at 3 TeV (Run 2) with 3.9 fb collision data recorded in 205, with a DAQ efficiency of 92%. In 206, 27. fb of pp collision data were recorded by the time of this conference, with very high efficiency. The peak luminosity delivered by LHC was cm 2 s, greater than the design value of 34 cm 2 s. The status of the detector is excellent, with close to 0% of readout channels available across all sub-detectors. L Trigger Rate [khz] ATLAS Trigger Operation L Group Rates (with overlaps) pp Data July 206, s= 3 TeV L Trigger Total Output Single MUON Multi MUON Single EM Multi EM Single JET Multi JET Missing Trans. Energy TAU Combined Luminosity Block [~ 60s] HLT Trigger Rate [Hz] ATLAS Trigger Operation HLT Physics Group Rates (with overlaps) pp Data July 206, s= 3 TeV Main Physics Stream Single Muons Multi Muons Single Electrons Multi Electrons Single Jet Multi Jets b-jets Missing Trans. Energy Taus Photons B-Physics Combined Objects Luminosity Block [~ 60s] Figure : Left: Physics trigger group rates at the first trigger level (L) for one fill as a function of the luminosity block number. Each luminosity block corresponds on average to 60 s. The fill was taken in July 206 with a peak luminosity of cm 2 s and a peak pile-up of 35. Presented are the rates of the individual L trigger groups for various L trigger physics objects. Overlaps are accounted for in the total output rate, but not in the individual groups, leading to a higher recording rate compared to the total L output rate. Right: Same as on the left, but physics trigger group rates at the High Level Trigger (HLT). [2] The improvements in the event selection and readout systems have allowed facing the 206 conditions, with a complex trigger menu designed to meet varied physics, monitoring and performance requirements. As can be seen in Fig. for a typical LHC fill, most of the bandwidth of the first level hardware (L) and High Level Trigger software (HLT) rates is still given to generic triggers, such as single isolated leptons, complemented by multi-object triggers and triggers dedicated to specific analyses.

3 The average physics output rate is khz, keeping the single leptons threshold at GeV and the missing energy threshold at 90- GeV. A detailed understanding of the detector performance is essential for the production of high quality results. In particular, as the mean number of interactions per crossing (pile-up) almost doubled in 206 with respect to 205, extensive work has been done to reduce its impact on the reconstruction performance of basic objects such as leptons, b-jets, missing energy, etc. 2 Results on Standard Model Physics A detailed understanding of the Standard Model (SM) processes is essential for the ATLAS physics program. While looking for possible deviations from SM predictions, they represent a key ingredient for the description of the backgrounds and Monte Carlo models in the new physics searches, which are pushing into increasingly intricate event signatures. An overview of such cross-section measurements is shown in Fig. 2. Figure 2: Overview of cross-section measurements of selected Standard Model processes compared to the corresponding theoretical expectations [3]. All theoretical expectations were calculated at NLO or higher. The measurements of Z production in association with jets [4] and massive diboson production [5] were briefy mentioned at the conference, and the interested reader is referred to the ATLAS results web page, as well as to specific references. These are just two examples demonstrating as accurate predictions from different Monte Carlo generators are needed to face the challenge of the precision of LHC data. 2

4 2. Higgs Boson measurements In July 202, the ATLAS and CMS collaborations announced the discovery of a Higgs boson [6, 7] using pp collision data collected at centre-of-mass energies s = 7 TeV and 8 TeV at the LHC. Using the full Run statistics, ATLAS and CMS have summarized their measurement in combined legacy papers [8, 9]. The Higgs boson mass is measured in the H γγ and H ZZ 4l decay channels. The results are obtained from a simultaneous fit to the reconstructed invariant mass peaks in the two channels and for the two experiments. The measured masses from the individual channels and the two experiments are found to be consistent among themselves. The combined measured mass of the Higgs boson is m H = ± 0.2(stat.) ± 0.(syst.) GeV [8]. Combined ATLAS and CMS measurements of the Higgs boson production and decay rates, as well as constraints on its couplings to vector bosons and fermions, are summarized in [9]. The combined signal yield relative to the Standard Model prediction is measured to be.09 ± 0.. The combined measurements lead to observed significances for the vector boson fusion production process and for the H ττ decay of 5.4 and 5.5 standard deviations, respectively. Most couplings measurements are consistent with the SM predictions within 2σ. The largest observed deviation is the ratio σ tth /σ ggf at 3.0 standard deviations to the SM. More studies have been performed using 205 and 206 data at s = 3 TeV. The first priority has been the rediscovery of the Higgs boson at the larger centre-of-mass energy. The analysis [] is based on the measurements performed in the individual H γγ and H ZZ decay channels. Higgs boson production is observed in the 3 TeV dataset with a local significance of about (8.6 expected), and evidence for production via vector boson fusion is seen with a local significance of about 4 (.9 expected). The total pp H + X cross-sections at centre-of-mass energies of 7, 8 and 3 TeV measured in these two decay channels are shown in Figure 3, along with their combination and the comparison to theoretical predictions. The cross-section σ(pp H + X, 3 TeV) is (stat.) +4.4 (syst.) pb, while the SM prediction is pb. The other Run 2 priorities are the refining of Higgs properties as couplings and mass; the search of tth production; the search for H bb decay (described below); the search for rare decays; the use of the Higgs boson as a tool to observe new physics. The decay with the largest predicted branching fraction (58%) for a SM Higgs boson of mass 25 GeV is H bb. However at the LHC the overwhelming backgrounds arising from multi-jet production make a fully inclusive search extremely challenging. The production modes where the Higgs boson is produced together with a W or Z boson provide a promising alternative despite having a cross-section more than an order of magnitude lower than the dominant gluon-gluon fusion production mode. The leptonic decays of the W and Z boson lead to relatively clean signatures that 3.5 3

5 [pb] σ pp H 0 80 ATLAS Preliminary σ pp H m H = GeV H γ γ H ZZ * 4l comb. data syst. unc. QCD scale uncertainty Tot. uncert. (scale PDF+α s ) s [TeV] s = 7 TeV, 4.5 fb s = 8 TeV, 20.3 fb s = 3 TeV, 3.3 fb (γ γ ), 4.8 fb (ZZ *) Figure 3: Total pp H + X cross-sections measured at different centre-of-mass energies compared to Standard Model predictions at up to N 3 LO in QCD []. can be used to significantly suppress the contributions from background processes and allow for an efficient triggering strategy. The LHC combination of the Run ATLAS and CMS analyses resulted in observed (expected) significances of 2.6 (3.7) standard deviations [9], therefore one of the main priorities for Run 2 is the measurement of the coupling with the b quark. A search for the decay of a Standard Model Higgs boson into a bb pair when produced in association with a W or Z boson has been performed using the data collected in proton-proton collisions from Run 2 at a centre-of-mass energy of 3 TeV, corresponding to an integrated luminosity of 3.2 fb []. Considered final states contain 0, and 2 charged leptons (electrons or muons), targeting the decays: Z νν, W lν, and Z ll. For m H = 25 GeV the ratio of the measured signal strength to the SM expectation is found to be µ = (stat.) ± 0.36(syst.). This corresponds to an observed significance of 0.42 standard deviations compared with an expected sensitivity of.94. The analysis procedure has been validated by measuring the yield of (W/Z)Z with Z bb, where the ratio of the observed yield to that expected in the Standard Model was found to be 0.9 ± 0.7(stat.) (syst.), corresponding to a significance of 3.0 standard deviations compared to an expected significance of Search for physics beyond the Standard Model A huge range of searches for physics beyond the Standard Model (BSM) have been performed by ATLAS, looking for new sequential bosons and fermions, new vector-like quarks, signals for extra dimensions, supersymmetric (SUSY) models, technicolour, 4

6 and so on. No evidence for new beyond-the-standard Model physics was observed at either 7 or 8 TeV centre-of-mass energy. The Run 2 dataset represents the possibility for a major extension of reach compared to Run thanks to the enhanced cross-sections at the larger energy. A very brief summary of some recent results is given. Diboson resonances Extensions of the SM predict the existence of new particles that may decay into vector-boson pairs, such as heavy neutral Higgs (spin 0), Heavy Vector Triplet W (spin ), Bulk Randall-Sundrum Graviton G* (spin 2). Results from the search for resonances with masses above TeV decaying to the diboson final states, W W, W Z and ZZ, in the fully-hadronic channel are reported [2]. Hadronic decays of the highly boosted W and Z bosons emerging from the decay of a heavy resonance are reconstructed within a single large-radius jet, and jet substructure properties are used to select jets consistent with boson decays. This selection strongly suppresses the large backgrounds due to SM multi-jet events. No significant excess is observed in the analyzed data set and exclusion limits are set. Diphoton resonances Using the 205 data, searches for new resonances decaying into two photons observed a deviation from the Standard Model background-only hypothesis corresponding to 3.9 standard deviations for a resonance spin-0 mass hypothesis of 730 GeV [3], see Events / 20 GeV ATLAS Data Background-only fit Spin-0 Selection - s = 3 TeV, 3.2 fb Local p-value 2 0σ σ 2σ 3 3σ Data - fitted background m γγ [GeV] 4 5 4σ ATLAS Preliminary - s=3 TeV, 5.4 fb Spin-0 Selection X γγ, Γ X / m X = 6 % (3.2 fb ) (2.2 fb ) Combination m X [GeV] Figure 4: Left: Invariant-mass distribution of the selected diphoton candidates, with the background-only fit overlaid, obtained with 205 data; the difference between the data and this fit is shown in the bottom panel [3]. Right: Compatibility with the background-only hypothesis as a function of the assumed signal mass with the full data set [4]. 5

7 Fig. 4 left. The excess is not confirmed in 206 data with a four times larger statistics [4]: in the GeV mass range the largest local significance is 2.3 standard deviations for a mass near 7 GeV and a relative width of %. The global significance of these excesses is less than one standard deviation, see Fig. 4 right. Dilepton resonances The dielectron and dimuon final-state signature has excellent sensitivity to a wide variety of new phenomena expected in theories beyond the Standard Model. It benefits from high signal selection efficiencies and relatively small, well-understood backgrounds. The observed dilepton invariant mass spectrum is consistent with the Standard Model prediction, within systematic and statistical uncertainties [5]. Similarly a search for W bosons decaying to a charged lepton (electron or muon) and a neutrino have been performed [6]. The transverse mass distribution is examined and no significant excess above Standard Model predictions is observed. In both cases lower limits on a resonance mass are set, enhancing the reach with respect to Run of more than TeV. SUSY searches Supersymmetry (SUSY) is a generalization of space-time symmetries that predicts new bosonic partners for the fermions and new fermionic partners for the bosons of the Standard Model and that provides a natural solution to the hierarchy problem. The large expected cross-sections predicted for the strong production of supersymmetric particles make the production of gluinos and squarks the primary target for early searches for SUSY in pp collisions at a centre-of-mass energy of 3 TeV at the LHC. As an example [7] results were reported of a search for supersymmetric particle production that could be observed in high-energy proton-proton collisions: events with large numbers of jets, together with missing transverse momentum from unobserved particles, are selected. The search selects events with various jet multiplicities from 8 to jets, and with various requirements on the sum of masses of large-radius reclustered jets. In contrast to many other searches for the production of strongly interacting SUSY particles in the hadronic channel, the requirement made of large jet multiplicity implies that the threshold on missing energy can be modest. No excess above Standard Model expectations is observed. The results are interpreted within two supersymmetry models, where gluino masses up to 600 GeV are excluded at 95% confidence level, extending previous limits. Searches summary At the time of the conference 50% of the search analyses were updated to the new Run 2 energy. In general the data agree well with the background expectations, so significant increase in excluded BSM particle mass ranges has been set. Figures 5 and 6 show the reach of ATLAS searches for Supersymmetry and other new phenomena. 6

8 ντ t t ATLAS SUSY Searches* - 95% CL Lower Limits ATLAS Preliminary Status: August 206 Model e, µ, τ, γ Jets E miss s = 7, 8, 3 TeV L dt[fb ] Mass limit s = 7, 8 TeV s = 3 TeV Reference T Inclusive Searches MSUGRA/CMSSM 0-3 e, µ /-2 τ 2- jets/3 b Yes 20.3 q, g.85 TeV m( q)=m( g) q q, q q χ jets Yes 3.3 q.35 TeV m( χ 0 )<200 GeV, m( st gen. q)=m(2 nd gen. q) ATLAS-CONF q q, q q χ 0 (compressed) mono-jet -3 jets Yes 3.2 q 608 GeV m( q)-m( χ 0 )<5 GeV g g, g q q χ jets Yes 3.3 g.86 TeV m( χ 0 )=0 GeV ATLAS-CONF g g, g qq χ ± qqw ± χ jets Yes 3.3 g.83 TeV m( χ 0 )<400 GeV, m( χ ± )=0.5(m( χ 0 )+m( g)) ATLAS-CONF g g, g qq(ll/νν) χ 0 3 e, µ 4 jets g.7 TeV m( χ 0 )<400 GeV ATLAS-CONF g g, g qqwz χ 0 2 e, µ (SS) 0-3 jets Yes 3.2 g.6 TeV m( χ 0 ) <500 GeV ATLAS-CONF GMSB ( l NLSP) -2 τ + 0- l 0-2 jets Yes 3.2 g 2.0 TeV GGM (bino NLSP) 2 γ - Yes 3.2 g.65 TeV cτ(nlsp)<0. mm GGM (higgsino-bino NLSP) γ b Yes 20.3 g.37 TeV m( χ 0 )<950 GeV, cτ(nlsp)<0. mm, µ< GGM (higgsino-bino NLSP) γ 2 jets Yes 3.3 g.8 TeV m( χ 0 )>680 GeV, cτ(nlsp)<0. mm, µ>0 ATLAS-CONF GGM (higgsino NLSP) 2 e, µ (Z) 2 jets Yes 20.3 g 900 GeV m(nlsp)>430 GeV Gravitino LSP 0 mono-jet Yes 20.3 F /2 scale 865 GeV m( G)>.8 4 ev, m( g)=m( q)=.5 TeV rd gen. g med. g g, g b b χ b Yes 4.8 g.89 TeV m( χ 0 )=0 GeV ATLAS-CONF g g, g t t χ 0 0- e, µ 3 b Yes 4.8 g.89 TeV m( χ 0 )=0 GeV ATLAS-CONF g g, g b t χ + 0- e, µ 3 b Yes 20. g.37 TeV m( χ 0 )<300 GeV rd gen. squarks direct production EW direct Long-lived particles RPV b b, b b χ0 0 2 b Yes 3.2 b 840 GeV m( χ 0 )<0 GeV b b, b t χ± 2 e, µ (SS) b Yes 3.2 b GeV m( χ 0 )<50 GeV, m( χ ± )= m( χ 0 )+0 GeV ATLAS-CONF t t, t b χ± 0-2 e, µ -2 b Yes 4.7/3.3 t 7-70 GeV GeV m( χ ± ) = 2m( χ 0 ), m( χ 0 )=55 GeV , ATLAS-CONF t t, t Wb χ0 or t χ e, µ 0-2 jets/-2 b Yes 4.7/3.3 t GeV GeV m( χ 0 )= GeV , ATLAS-CONF t t, t c χ0 0 mono-jet Yes 3.2 t GeV m( t)-m( χ 0 )=5 GeV t t(natural GMSB) 2 e, µ (Z) b Yes 20.3 t GeV m( χ0 )>50 GeV t2 t2, t2 t + Z 3 e, µ (Z) b Yes 3.3 t GeV m( χ0 )<300 GeV ATLAS-CONF t2 t2, t2 t + h e, µ 6 jets + 2 b Yes 20.3 t GeV m( χ0 )=0 GeV ll,r ll,r, l l χ0 2 e, µ 0 Yes 20.3 l GeV m( χ 0 )=0 GeV χ + χ, χ + lν(l ν) 2 e, µ 0 Yes 3.3 χ ± 640 GeV m( χ 0 )=0 GeV, m( l, ν)=0.5(m( χ ± )+m( χ 0 )) ATLAS-CONF χ + χ, χ + τν(τ ν) 2 τ - Yes 4.8 χ ± 580 GeV m( χ 0 )=0 GeV, m( τ, ν)=0.5(m( χ ± )+m( χ 0 )) ATLAS-CONF χ ± χ0 2 llν lll( νν), l ν lll( νν) 3 e, µ 0 Yes 3.3 χ ±.0 TeV m( χ ± )=m( χ 0 2), m( χ 0 )=0, m( l, ν)=0.5(m( χ ± )+m( χ 0, χ0 2 )) ATLAS-CONF χ ± χ0 2 W χ 0 Z χ e, µ 0-2 jets Yes 20.3 χ ± 425 GeV m( χ ± )=m( χ 0 2), m( χ 0 )=0, l decoupled , , χ0 2 χ ± χ0 2 W χ 0 h χ 0, h b b/ww/ττ/γγ e, µ, γ 0-2 b Yes 20.3 χ ± 270 GeV m( χ ± )=m( χ 0 2), m( χ 0 )=0, l decoupled 50.07, χ0 2 χ 0 2 χ0 3, χ 0 2,3 lrl 4 e, µ 0 Yes 20.3 χ GeV m( χ 0 2)=m( χ 0 3), m( χ 0 )=0, m( l, ν)=0.5(m( χ 0 2)+m( χ 0 2,3 )) GGM (wino NLSP) weak prod. e, µ + γ - Yes 20.3 W GeV cτ< mm GGM (bino NLSP) weak prod. 2 γ - Yes 20.3 W 590 GeV cτ< mm Direct χ + χ prod., long-lived χ ± Disapp. trk jet Yes 20.3 χ ± m( χ ± )-m( χ 0 ) 60 MeV, τ( χ ± 270 GeV )=0.2 ns Direct χ + χ prod., long-lived χ ± de/dx trk - Yes 8.4 χ ± m( χ ± )-m( χ 0 ) 60 MeV, τ( χ ± 495 GeV )<5 ns Stable, stopped g R-hadron 0-5 jets Yes 27.9 g 850 GeV m( χ 0 )=0 GeV, µs<τ( g)<00 s Stable g R-hadron trk g.58 TeV Metastable g R-hadron de/dx trk g.57 TeV m( χ 0 )=0 GeV, τ> ns GMSB, stable τ, χ 0 τ(ẽ, µ)+τ(e, µ) -2 µ χ GeV <tanβ< GMSB, χ 0 γ G, long-lived χ 0 2 γ - Yes 20.3 χ GeV <τ( χ 0 )<3 ns, SPS8 model g g, χ 0 eeν/eµν/µµν displ. ee/eµ/µµ χ 0.0 TeV 7 <cτ( χ 0 )< 740 mm, m( g)=.3 TeV GGM g g, χ 0 Z G displ. vtx + jets χ 0.0 TeV 6 <cτ( χ 0 )< 480 mm, m( g)=. TeV LFV pp ντ + X, ντ eµ/eτ/µτ eµ,eτ,µτ TeV λ 3 =0., λ32/33/233= Bilinear RPV CMSSM 2 e, µ (SS) 0-3 b Yes 20.3 q, g.45 TeV m( q)=m( g), cτls P< mm χ + χ, χ + W χ 0, χ 0 eeν, eµν, µµν 4 e, µ - Yes 3.3 χ ± m( χ 0.4 TeV )>400GeV, λ2k 0 (k =, 2) ATLAS-CONF χ + χ, χ + W χ 0, χ 0 ττνe, eτντ 3 e, µ + τ - Yes 20.3 χ ± m( χ 0 )>0.2 m( χ ± 450 GeV ), λ g g, g qqq large-r jets g.08 TeV BR(t)=BR(b)=BR(c)=0% ATLAS-CONF g g, g qq χ 0, χ 0 qqq large-r jets g.55 TeV m( χ 0 )=800 GeV ATLAS-CONF g g, g t t χ 0, χ 0 qqq e, µ 8- jets/0-4 b g.75 TeV m( χ 0 )=700 GeV ATLAS-CONF g g, g tt, t bs e, µ 8- jets/0-4 b g.4 TeV 625 GeV<m( t)<850 GeV ATLAS-CONF t t, t bs 0 2 jets + 2 b GeV GeV ATLAS-CONF , ATLAS-CONF t t, t bl 2 e, µ 2 b TeV BR( t be/µ)>20% ATLAS-CONF Other Scalar charm, c c χ c Yes 20.3 c 5 GeV m( χ 0 )<200 GeV *Only a selection of the available mass limits on new states or phenomena is shown. Mass scale [TeV] Figure 5: Mass reach of ATLAS searches for Supersymmetry [8]. Only a representative selection of the available results is shown. Blue (green) bands indicate 3 TeV (8 TeV) data results. ATLAS Exotics Searches* - 95% CL Exclusion Status: August 206 L dt = ( ) fb ATLAS Preliminary s = 8, 3 TeV Model l, γ Jets E miss T L dt[fb ] Limit Reference Extra dimensions ADD GKK + g/q j Yes 3.2 MD 6.58 TeV n = ADD non-resonant ll 2 e, µ 20.3 MS 4.7 TeV n = 3 HLZ ADD QBH lq e, µ j 20.3 Mth 5.2 TeV n = ADD QBH 2 j 5.7 Mth 8.7 TeV n = 6 ATLAS-CONF ADD BH high pt e, µ 2 j 3.2 Mth 8.2 TeV n = 6, MD = 3 TeV, rot BH ADD BH multijet 3 j 3.6 Mth 9.55 TeV n = 6, MD = 3 TeV, rot BH RS GKK ll 2 e, µ 20.3 GKK mass 2.68 TeV k/mpl = RS GKK γγ 2 γ 3.2 GKK mass 3.2 TeV k/mpl = Bulk RS GKK WW qqlν e, µ J Yes 3.2 GKK mass.24 TeV k/mpl =.0 ATLAS-CONF Bulk RS GKK HH bbbb 4 b 3.3 GKK mass GeV k/mpl =.0 ATLAS-CONF Bulk RS gkk tt e, µ b, J/2j Yes 20.3 gkk mass 2.2 TeV BR = UED / RPP e, µ 2 b, 4 j Yes 3.2 KK mass.46 TeV Tier (,), BR(A (,) tt) = ATLAS-CONF Gauge bosons SSM Z ll 2 e, µ 3.3 Z mass 4.05 TeV ATLAS-CONF SSM Z ττ 2 τ 9.5 Z mass 2.02 TeV Leptophobic Z bb 2 b 3.2 Z mass.5 TeV SSM W lν e, µ Yes 3.3 W mass 4.74 TeV ATLAS-CONF HVT W WZ qqνν model A 0 e, µ J Yes 3.2 W mass 2.4 TeV gv = ATLAS-CONF HVT W WZ qqqq model B 2 J 5.5 W mass 3.0 TeV gv = 3 ATLAS-CONF HVT V WH/ZH model B multi-channel 3.2 V mass 2.3 TeV gv = LRSM W R tb e, µ 2 b, 0- j Yes 20.3 W mass.92 TeV 4.43 LRSM W R tb 0 e, µ b, J 20.3 W mass.76 TeV CI DM LQ Heavy quarks Excited fermions Other CI qqqq 2 j 5.7 Λ 9.9 TeV ηll = ATLAS-CONF CI llqq 2 e, µ 3.2 Λ 25.2 TeV ηll = CI uutt 2(SS)/ 3 e,µ b, j Yes 20.3 Λ 4.9 TeV CRR = Axial-vector mediator (Dirac DM) 0 e, µ j Yes 3.2 ma.0 TeV gq=0.25, gχ=.0, m(χ) < 250 GeV Axial-vector mediator (Dirac DM) 0 e, µ, γ j Yes 3.2 ma 7 GeV gq=0.25, gχ=.0, m(χ) < 50 GeV ZZχχ EFT (Dirac DM) 0 e,µ J, j Yes 3.2 M 550 GeV m(χ) < 50 GeV ATLAS-CONF Scalar LQ st gen 2 e 2 j 3.2 LQ mass. TeV β = Scalar LQ 2 nd gen 2 µ 2 j 3.2 LQ mass.05 TeV β = Scalar LQ 3 rd gen e, µ b, 3 j Yes 20.3 LQ mass 640 GeV β = VLQ TT Ht + X e, µ 2 b, 3 j Yes 20.3 T mass 855 GeV T in (T,B) doublet VLQ YY Wb + X e, µ b, 3 j Yes 20.3 Y mass 770 GeV Y in (B,Y) doublet VLQ BB Hb + X e, µ 2 b, 3 j Yes 20.3 B mass 735 GeV isospin singlet VLQ BB Zb + X 2/ 3 e, µ 2/ b 20.3 B mass 755 GeV B in (B,Y) doublet VLQ QQ WqWq e, µ 4 j Yes 20.3 Q mass 690 GeV VLQ T5/3T5/3 WtWt 2(SS)/ 3 e,µ b, j Yes 3.2 T5/3 mass 990 GeV ATLAS-CONF Excited quark q qγ γ j 3.2 q mass 4.4 TeV only u and d, Λ = m(q ) Excited quark q qg 2 j 5.7 q mass 5.6 TeV only u and d, Λ = m(q ) ATLAS-CONF Excited quark b bg b, j 8.8 b mass 2.3 TeV ATLAS-CONF Excited quark b Wt or 2 e, µ b, 2-0 j Yes 20.3 b mass.5 TeV fg = fl = fr = Excited lepton l 3 e, µ 20.3 l mass 3.0 TeV Λ = 3.0 TeV Excited lepton ν 3 e, µ, τ 20.3 ν mass.6 TeV Λ =.6 TeV LSTC at W γ e, µ, γ Yes 20.3 at mass 960 GeV LRSM Majorana ν 2 e,µ 2 j 20.3 N 0 mass 2.0 TeV m(wr ) = 2.4 TeV, no mixing Higgs triplet H ±± ee 2 e (SS) 3.9 H ±± mass 570 GeV DY production, BR(H ±± L ee)= ATLAS-CONF Higgs triplet H ±± lτ 3 e, µ, τ 20.3 H ±± mass 400 GeV DY production, BR(H ±± lτ)= L Monotop (non-res prod) e, µ b Yes 20.3 spin- invisible particle mass 657 GeV anon res = Multi-charged particles 20.3 multi-charged particle mass 785 GeV DY production, q = 5e Magnetic monopoles 7.0 monopole mass.34 TeV DY production, g = gd, spin / s = 8 TeV s = 3 TeV *Only a selection of the available mass limits on new states or phenomena is shown. Lower bounds are specified only when explicitly not excluded. Small-radius (large-radius) jets are denoted by the letter j (J). Mass scale [TeV] Figure 6: Reach of ATLAS searches for new phenomena other than Supersymmetry [9]. Only a representative selection of the available results is shown. Yellow (green) bands indicate 3 TeV (8 TeV) data results. 4 Conclusions After the first LHC long shutdown ATLAS has enhanced detectors and trigger systems that are coping very well with a pile-up environment beyond the design. Many measurements of Standard Model processes have been made, accessing simple and complex final states, probing perturbative QCD, searching for fermionic Higgs cou- 7

9 plings and starting precise measurements of its properties at 3 TeV. The larger centre-of-mass energy has allowed a major extension of reach compared to Run and many topologies for BSM physics have been explored. In general the data agree well with the background expectations, therefore a significant increase in excluded BSM particle mass ranges has been set. Some modest excesses are observed: the rest of 206 data will show if they persist or go away. References [] ATLAS Collaboration, JINST 3 (2008) S [2] [3] [4] ATLAS Collaboration, ATLAS-CONF [5] ATLAS Collaboration, arxiv:606:0407. [6] ATLAS Collaboration, Phys. Lett. B76 (202) [7] CMS Collaboration, Phys. Lett. B76 (202) 30. [8] ATLAS and CMS Collaborations, Phys. Rev. Lett. 4 (205) 9803; arxiv: [9] ATLAS and CMS Collaborations, JHEP 608 (206) 045; arxiv: [] ATLAS Collaboration, ATLAS-CONF [] ATLAS Collaboration, ATLAS-CONF [2] ATLAS Collaboration, ATLAS-CONF [3] ATLAS Collaboration, JHEP 09 (206) ; arxiv: [4] ATLAS Collaboration, ATLAS-CONF [5] ATLAS Collaboration, ATLAS-CONF [6] ATLAS Collaboration, ATLAS-CONF [7] ATLAS Collaboration, ATLAS-CONF [8] [9] 8