Current Status and Future Prospect of the LHC Experiment

Transcription

1 Current Statu and Future Propect of the LHC Experiment J. Tanaka International Center for Elementary Particle Phyic, the Univerity of Tokyo, Tokyo 3-33, JAPAN We preent reult from the ATLAS and CMS experiment focuing on Higg earche, where the dicovery of a Higg-like particle of around 6 GeV ma wa announced on the 4th of July, and variou tudie ha been performed to undertand the propertie of thi new particle. In addition the future plan of the LHC experiment i briefly ummarized and the potential performance on ome of poible phyic with the planned LHC i dicued. All the content decribed in thi paper are baed on reult obtained until the 3th of February, 3. I. INTRODUCTION The ATLAS and CMS experiment have achieved the excellent goal with the firt fb at a center-ofma energy =7 TeV and 8 TeV. The dicovery of the Standard Model (SM) Higg boon [ 3] i one of the primary goal of the Large Hadron Collider (LHC) [4] program at CERN to undertand the mechanim of electroweak ymmetry breaking and the origin of ma of elementary particle. Both ATLAS and CMS oberved a Higg-like particle at around 6 GeV with a ignificance of over σ [, 6]. Thi dicovery give u a phae hift in the Higg phyic from earch to meaurement and the preciion meaurement of the propertie of thi new particle get more important to undertand the SM Higg ector and to look for hint of phyic beyond the SM (BSM). On the other hand, there i no indication of BSM with 7 TeV and 8 TeV direct earche. In Superymmetry (SUSY) earche, gluino and quark with mae below about. TeV were excluded for typical SUSY model (e.g. msugra) and natural SUSY cenario were excluded up to top (top quark) ma of 6 GeV. Searche for other new particle and enhancement alo excluded variou model having the ma cale of 3 TeV. In 3 and 4, LHC i topped to go to the deign energy ( =4 TeV) and phyic run will be retarted in. The energy upgrade i important to dicover (heavy) BSM and more data i neceary for the precie meaurement of the Higg-like particle propertie and o on. II. LHC AND ATLAS/CMS EXPERIMENTS LHC wa operated in proton-proton colliion at =7 TeV in and and 8 TeV in. The ATLAS and CMS detector [7, 8] collected data of 6 fb with =7 TeV and 3 fb with 8 TeV a hown in Fig.. In thi paper, reult with 7 TeV data taken in and/or a part of 8 TeV data (up to 3 fb ) are preented. CMS Integrated Luminoity, pp ] Delivered Luminoity [fb 3 3 Jan ATLAS Online Luminoity pp pp pp Apr = 7 TeV = 7 TeV = 8 TeV Jul Oct Month in Year Total Integrated Luminoity (fb ) Apr included from -3-3 : to 6 :49 UTC, 7 TeV, 44. pb, 7 TeV, 6. fb, 8 TeV, 3.3 fb May Jun Jul Aug Sep Date (UTC) Oct Nov Dec FIG. : Integrated luminoity a a function of date in ( = 7 TeV), (7 TeV) and (8 TeV) for ATLAS (left) and CMS (right). -quality check were applied and about 9% of delivered data i ued in phyic analyi.

2 III. SEARCH FOR STANDARD MODEL HIGGS The production cro ection and decay branching ratio for everal SM Higg channel are hown in Fig. [9]. At around 6 GeV, where a Higg-like particle wa oberved, five dominant decay channel can be invetigated with reaonable data tatitic (up to a few fb ) and give u meaurement of the propertie of thi new particle, for example, (relative) coupling to gauge boon and fermion etc. We briefly ummarize analyi and reult from both ATLAS and CMS for γγ, ZZ ( ) l + l l + l, W W ( ) l + νl ν, b b and ττ channel. Detail of analyi are decribed in Ref cited in each ection. σ(pp H+X) [pb] pp H (NNLO+NNLL QCD + NLO EW) pp qqh (NNLO QCD + NLO EW) pp WH (NNLO QCD + NLO EW) pp ZH (NNLO QCD +NLO EW) = 8 TeV LHC HIGGS XS WG Branching ratio ττ cc bb gg WW ZZ LHC HIGGS XS WG pp tth (NLO QCD) - γγ Zγ M H M H FIG. : Production cro-ection (left) of the SM Higg at =8 TeV and branching ratio (right) a a function of the SM Higg ma [9]. A. channel The branching ratio of i very mall, about.% in the ma range of GeV while thank to a good reolution of diphoton invariant ma m γγ (.3% depending on categorie), a narrow reonance i oberved on a huge, mooth background a hown in Fig. 3 [6, ]. Two photon candidate are elected with a tranvere momentum (p T ) of p T > 4 GeV and 3 GeV at ATLAS and p T > m γγ /3 and m γγ /4 at CMS (/ intead of /3 for VBF-category). Selected event are eparated into everal categorie to improve enitivitie for a global earch and pecific production procee, for example, VBF and V H. At ATLAS, () categorie for 8 (7) TeV are introduced, where one for V H (with lepton) and two for VBF and V H (with dijet) while at CMS, 6 () categorie for 8 (7) TeV, where two for VBF proce and multi-variate analyi (MVA) i performed. Four categorie out of them are defined baed on MVA output. The purity of VBF proce in the VBFcategory i 7 8%. The larget exce with repect to the background-only hypothei (baed on local p ) i oberved (expected) with 6. (3.3) tandard deviation (σ) at 6. GeV by ATLAS and 4.σ (.8σ) at GeV by CMS. B. H ZZ ( ) l + l l + l channel Thi channel ha mall background ince 4 lepton (e and µ) are required and good ma reolution (. %) thank to precie meaurement of muon momenta and electron energy. Higg boon candidate are elected by requiring two ame-flavor, oppoite-ign iolated lepton pair in an event. Thee four lepton are required to have p T >,, and 7/6 GeV at ATLAS and p T >,, 7/ and 7/ GeV at CMS (e/µ). Figure 4 how the invariant ma (m 4l ) ditribution of elected 4 lepton and a clear reonance i oberved at around GeV. A peak due to Z with FSR Z i alo found at around 9 GeV. In addition CMS adopt MELA (Matrix element likelihood analyi), which ue the fact that the kinematic of thi final tate can be decribed with 7 parameter ( angle and mae), to improve enitivitie ( %). Figure how two-dimenional plot of the output (K D ) from MELA and m 4l for ignal and background and the ignal event have large K D value. The larget exce i oberved (expected) with 4.σ (3.σ) at 3. GeV by ATLAS and 4.σ (.σ) at.9 GeV by CMS [].

3 Event / GeV Event-Fit = 7 TeV, Ldt = 4.8 fb = 8 TeV, Ldt = 3. fb Selected diphoton ample + Sig+Bkg Fit (m =6. GeV) H Bkg (4th order polynomial) ATLAS Preliminary m γγ S/(S+B) Weighted Event /. GeV CMS = 7 TeV, L =. fb = 8 TeV, L =.3 fb S+B Fit B Fit Component σ σ Event /. GeV Unweighted 3 m γγ 3 4 m γγ FIG. 3: The diphoton invariant ma ditribution for ATLAS (left) [] and CMS (right) [6]. Event weight are applied at the CMS plot. Event/ GeV 3 3 Background ZZ Background Z+jet, tt Signal (m = GeV) H Syt.Unc. = 7 TeV: Ldt = 4.6 fb = 8 TeV: Ldt = 3. fb H ZZ 4l Event / 3 GeV CMS preliminary = 7 TeV, L =. fb = 8 TeV, L =. fb Z+X Zγ*, ZZ m H =6 GeV m 4l m 4l FIG. 4: The 4-lepton invariant ma ditribution for ATLAS (left) and CMS (right) []. C. H W W ( ) l + νl ν channel Thi channel relatively ha a large ignal event yield even in a low ma region of around 6 GeV and the background procee can be uppreed by requiring two oppoite-ign iolated lepton (ee, µµ and eµ at CMS while only eµ at ATLAS) and high miing tranvere energy ET mi. The ma of the Higg candidate cannot be recontructed due to two neutrino in the final tate, hence the tranvere ma m T, defined with lepton momenta, ET mi and it angle, i ued a (one of) final dicriminant variable(). In addition ince the direction of two lepton from W boon decay are preferentially cloe, due to the pin quantum number of Higg and W boon, a mall angle between the two lepton, a well a a low invariant ma of two lepton (m ll ( )) are expected. CMS ue two variable m T and m ll ( ) for the final dicriminant while at ATLAS only m T i ued for the final dicriminant and cut on the m ll ( ) variable are applied. The elected event are eparated into -jet and -jet categorie at ATLAS and / and -jet at CMS. Figure 6 (top) how the m T ditribution for -jet and -jet categorie at ATLAS []. A two-dimenional hape analyi in the (m T, m ll ( )) plane i performed for -jet and -jet categorie at CMS. Figure 6 (bottom) how reult with the one-dimenional bin ditribution obtained from the two-dimenional analyi []. Non-reonant W W i dominant in the -jet category, and topquark production i dominant in the -jet category in thee ditribution. Becaue there i no power on ma determination, the exce i oberved in a wide ma range. The oberved (expected) ignificance at GeV i.6σ (.9σ) and 3.σ (4.σ) at ATLAS and CMS, repectively.

4 K D CMS preliminary = 7 TeV, L =. fb = 8 TeV, L =. fb 4e 4µ eµ m 4l K D CMS preliminary = 7 TeV, L =. fb = 8 TeV, L =. fb 4e 4µ eµ m 4l FIG. : Ditribution of the MELA output K D veru the 4-lepton recontructed ma m 4l for 6 GeV Higg ignal (left) and background (right)[]. Event / GeV M H = GeV = 8 TeV, Ldt = 3. fb H WW eνµν/µνeν ( jet) SM (y tat) 3 CMS preliminary WW WZ/ZZ/Wγ t t Single Top Z+jet W+jet H [ GeV] m T = 8TeV, L =. fb Event / GeV 8 SM (y tat) M H = GeV = 8 TeV, Ldt = 3. fb H WW eνµν/µνeν ( jet) 3 CMS preliminary WW WZ/ZZ/Wγ t t Single Top Z+jet W+jet H [ GeV] m T = 8TeV, L =. fb GeV) Event/( GeV /MC data H() WW * Z/γ top VV W+jet Event/( GeV GeV) /MC data H() WW * Z/γ top VV W+jet Bin index Bin index FIG. 6: The m T ditribution (top) at ATLAS and the one-dimenional bin ditribution ued in the two-dimenional analyi (bottom) at CMS []. Left plot are for -jet and right for -jet category. D. H b b channel Higg boon produced in aociation with a W or Z boon (denoted a V ) are earched with three different final tate, W H lνb b, ZH llb b and ZH ννb b by requiring -lepton, -lepton and -lepton, repectively. The event election i baed on the requirement of two b-tagged jet and the kinematic recontruction of the vector boon. A typical performance of b-tagging ued i about 7%, % and a few% efficiencie for b, c and light-jet, repectively. Event are eparated into everal categorie by uing the tranvere momentum of the vector boon p V T to improve enitivitie. ATLAS ha categorie for - and -lepton and 3 for -lepton while CMS ha categorie in only higher p V T region comparing to ATLAS. CMS ue MVA to improve the ma reolution of two b-quark m b b. The final dicriminant variable i m b b at ATLAS and MVA output at

5 CMS a hown in Fig. 7. They are only for -lepton of the highet p V T category. The oberved (expected) 9% CL limit on the cro-ection at GeV i.8 (.9) and. (.) time the SM prediction at ATLAS and CMS [3], repectively. Figure 8 alo how the m b b ditribution in data after ubtraction of all background except diboon procee. The data are conitent with the preence of diboon ignal with a mall contribution from GeV SM Higg boon. Event/ GeV 4 ZH L dt=3. fb, = 8 TeV mi Lepton Jet, E > GeV T WH Multijet Top Wb W Zb Z Diboon Pre Fit m bb Entrie /. 6 CMS Preliminary VH = 8TeV, L =. fb Z(νν)H(bb) 4 3 /MC.. Z + bb Z+udcg W + bb W+udcg tt Single top VV VH ( GeV) MC uncert. (tat.) χ =.7 K =.999 ν MC uncert. (tat. + yt.) MC uncert. (tat.) BDT output FIG. 7: The m b b ditribution from ATLAS (left) and the MVA output from CMS (right) for the -lepton channel of the highet p V T category [3]. Event/ GeV 4 3 L dt=3. fb, L dt=4.7 fb,,, lepton = 8 TeV = 7 TeV WZ+ZZ WH GeV ZH GeV - Bkgd m bb Event /. CMS Preliminary 8 = 7 TeV, L =. fb = 8 TeV, L =. fb pp VH; H bb 6 4 Sub. tat. uncert. VH( GeV) VV MC uncert. (tat.) - M bb FIG. 8: The m b b ditribution in data after ubtraction of all background except diboon procee for ATLAS (left) and CMS (right) [3]. E. H ττ channel Higg boon decaying into a τ-pair are earched in the H τ lep τ lep (o-called ll), H τ lep τ had (lh) and H τ had τ had (hh) channel, where τ lep and τ had denote leptonically and hadronically decaying τ lepton, repectively. Categorization i introduced baed on the event topologie; (=4/4/) categorie at ATLAS and 8(=3/3/) categorie at CMS for (ll/lh/hh). Among them, the VBF category i important becaue S/B i better by requiring two high p T jet and the typical cut for uch jet are m jj > 3 GeV and η jj > The purity of VBF proce in the VBF category i 7 8%. Figure 9 how the m ττ ditribution of the VBF category for ll/lh/hh channel. The oberved (expected) 9% CL limit on the cro-ection at GeV i.9 (.) and.63 (.) time the SM prediction at ATLAS and CMS [4], repectively. F. Obervation and Signal Strength a the SM Higg The ignificance of an exce in the data i quantified with the local p, the probability that the background can produce a fluctuation greater than or equal to the exce oberved in data. The equivalent formulation in term of number of tandard deviation i referred to a the local ignificance. Figure how the local p a a

6 Event / GeV 3 ee + eµ + µµ H+-jet VBF x H() ττ Z ee,µµ tt+ingle-top WW/WZ/ZZ Fake lepton Bkg. uncert. L dt = 3. fb = 8 TeV MMC m ττ Event / GeV H+-jet VBF + eτ had µτ had H() ττ Other Fake τ Bkg. uncert. L dt = 3. fb = 8 TeV 3 MMC ma m ττ Event / 6 GeV 3 H+-jet VBF τ had τ had x H() ττ Multi-jet Other Bkg. uncert. L dt = 3. fb = 8 TeV MMC ma m ττ [/GeV] dn/dm ττ 4. CMS Preliminary, = 7-8 TeV, L = 7 fb τ µ τh H() ττ oberved electroweak tt QCD bkg. uncertainty [/GeV] dn/dm ττ CMS Preliminary, = 7-8 TeV, L = 7 fb τ e τµ H() ττ oberved electroweak tt QCD bkg. uncertainty [/GeV] dn/dm ττ CMS Preliminary, = 8 TeV, L =. fb τ h τh. H( GeV) ττ oberved tt electroweak QCD bkg. uncertainty m ττ. 3 m ττ. 3 m ττ FIG. 9: Recontructed m ττ of the elected VBF-category event in the ll (left), lh (middle), hh (right) channel for ATLAS (top) and CMS (bottom) [4]. function of m H for variou channel and the combination of all channel for ATLAS and CMS. The larget local ignificance in the combination i oberved (expected) with 7.σ (.9σ) at GeV by ATLAS and 6.9σ (7.8σ) at.8 GeV by CMS []. The bet-fit ignal trength µ for the combination of all channel i evaluated to be.3.4 at GeV by ATLAS and.88. at.8 GeV by CMS [], which are conitent with the ignal expected from a SM Higg boon at that ma. The bet-fit value of µ for each channel i independently meaured a hown in Fig. for ATLAS and CMS at the given ma. Some of channel till have large uncertaintie (mainly due to tatitic) and will get better by adding more data and improving analyi. Figure (right) how 68% CL contour in the (µ qqh+v H, µ ggh+tth ) plane for each channel [], where µ qqh+v H repreent the coupling to vector boon and µ ggh+tth for top-quark coupling. The b b and ττ channel can determine µ qqh+v H better than µ ggh+tth and the ZZ channel ha no power on µ qqh+v H determination becaue there i no category for VBF and V H. All the reult are conitent with the SM prediction. G. Ma meaurement The ma of thi new particle i meaured with and H ZZ ( ) l + l l + l channel, which have excellent ma reolution a mentioned before. A ma of m H = (tat).7 (yt) GeV [] i found with the channel by ATLAS. A ma of m H = GeV and [] i meaured with the H ZZ ( ) l + l l + l channel at ATLAS and CMS, repectively. About 3σ difference (tenion) between thee channel i oberved by ATLAS. From the combination of thee channel the common ma i evaluated to be m H =..3.6 GeV by ATLAS and GeV by CMS []. Figure how CL contour for thee channel to ee which value of µ and m H of a ignal hypothei are imultaneouly conitent with data. H. Spin meaurement ATLAS and CMS have tarted to check if the oberved new particle ha pin/parity J P = + by uing the [] and H ZZ ( ) l + l l + l [] channel. In the channel, angle θ between a photon

7 p Combined oberved γγ oberved llll oberved lvlv oberved ττ oberved bb oberved Combined expected = 7TeV, Ldt = fb = 8TeV, Ldt = 3 fb 3 3 m H σ σ 3σ 4σ σ 6σ 7σ Local p-value CMS Preliminary = 7 TeV, L. fb = 8 TeV, L. fb σ σ 3σ Combined ob. Exp. for SM H H bb H ττ H WW H ZZ m H 4σ σ 6σ 7σ 8σ FIG. : The local probability p for a background-only experiment to be more ignal-like than the obervation a a function of m H for variou individual channel and the combination of all the channel for ATLAS (left) and CMS (right) []. W,Z H bb H ττ H WW lνlν H ZZ 4l Combined = 7 TeV: Ldt = 4.7 fb = 8 TeV: Ldt = 3 fb = 7 TeV: Ldt = 4.6 fb = 8 TeV: Ldt = 3 fb = 8 TeV: Ldt = 3 fb = 7 TeV: Ldt = 4.8 fb = 8 TeV: Ldt = 3 fb = 7 TeV: Ldt = 4.6 fb = 8 TeV: Ldt = 3 fb = 7 TeV: Ldt = fb = 8 TeV: Ldt = 3 fb µ =.3.4 m H = GeV + Signal trength (µ) H bb H ττ H WW H ZZ = 7 TeV, L. fb = 8 TeV, L. fb CMS Preliminary m H =.8 GeV... Bet fit σ/σ SM µ qqh+vh CMS Preliminary = 7 TeV, L. fb = 8 TeV, L. fb H ττ H WW H ZZ H bb µ ggh+tth FIG. : Meaured ignal trength parameter µ for the individual channel at m H = GeV for ATLAS (left) and at m H =.8 GeV for CMS (middle) []. The 68% CL contour of the ignal trength (µ qqh+v H, µ ggh+tth) for the individual channel at CMS []. in the Higg ret frame and a Higg lab frame with a few modification (o-called Collin-Soper frame) i ued and two pin/parity hypothee are compared: the + SM Higg and a graviton-like pin- tate with minimal coupling ( + m). Figure 3 (left) how co θ ditribution after the ubtraction of background, profiled with a fit where + / + m ratio i free. The expected difference between + m and + i changed a a function of the fraction of gluon fuion production and in the oberved difference, for any gluon fuion production fraction, data favor the + hypothei []. In the H ZZ ( ) l + l l + l channel, like MELA ued by CMS, angle and mae are baically ued. Figure 3 (right) how a likelihood ratio between and + and the data difavor the hypothei with CL S of.4% []. Other variou comparion are found in Ref [, ] and the data favor the + hypothei. IV. SEARCH FOR BSM Two Higg doublet are required in everal model, for example, the Minimal Superymmetric Standard Model (MSSM), which i an extenion of the SM and they are coupled eparately to up-type and down-type fermion. Thi reult in five phyical Higg boon, two of which are neutral and CP -even (h,h), one of which i neutral and CP -odd (A), and two of which are charged (H ). Since coupling to down-type fermion are enhanced with increaing tan β for A and either H or h, earche for neutral MSSM Higg boon are performed with the ττ channel. Figure 4 (left) and (middle) how an excluion region in (m A, tan β) plan for ATLAS and CMS [6], repectively. A low ma region i being cloed in all tan β range. A earch for a low ma

8 Signal trength (µ) = 7 TeV: Ldt = fb = 8 TeV: Ldt = 3. fb + combined H ZZ 4l σ/σ SM CMS Preliminary = 7 TeV, L. fb = 8 TeV, L. fb + H ZZ Combined H ZZ.. Bet fit 68% CL 9% CL m H m X FIG. : CL contour in the (µ, m H) plane for the and H ZZ ( ) l + l l + l channel and their combination for ATLAS (left) and CMS (right) []. In the CMS plot, the contour correpond to 68% CL. CMS Preliminary = 7 TeV, L =. fb ; = 8 TeV, L =. fb Event /. 8 J P + = (SM) pdf 6 4 P + gg, J = m pdf Background-ubtracted data Background uncertainty Generated experiment CMS data - L dt = 3 fb, = 8 TeV coθ* - - ln(l /L + ) + FIG. 3: Background-ubtracted data ditribution (left), profiled with a fit where the + / + m ratio i free, in the channel. The fitted ratio value i.6 []. Ditribution of ln(l /L +) (right) for two ignal hypothei in the H ZZ ( ) l + l l + l channel. The arrow indicate the oberved value []. charged Higg, which i produced via t bh, i alo performed with the H τν and cb channel and Figure 4 (right) how reult from the τν channel [7]. In the MSSM m max h cenario, a range on tan β except around i excluded in m H < GeV. A earch for high ma charged Higg i important in future. tan β L dt = fb = 7 TeV max, µ> m h 9% CL limit ATLAS Oberved CL Expected CL µµ channel τ e τ µ channel τ e τ had /τ µ τ had channel τ had τ had channel Combination LEP m A tanβ CMS Preliminary, = 7+8 TeV, L = 7 fb 9% CL Excluded Region 4 Oberved Expected 4 σ expected σ expected 3 LEP 3 max MSSM m h cenario M = TeV SUSY m A tan β ATLAS max m h =7 TeV Median expected excluion Oberved excluion 9% CL Oberved +σ theory Oberved σ theory Ldt = 4.6 fb m H + FIG. 4: Excluion at 9% CL in the (m A, tan β) plan with the ττ channel for ATLAS (left) and CMS (middle) [6] and with the H τν channel at ATLAS [7]. SUSY earche have been performed with many event topologie. In typical SUSY model, for example, msugra, gluino and quark can be produced via trong interaction at the LHC and uch event are expected to be oberved with event topologie of high p T jet plu a large ET mi. Figure (left) how an excluion ma region of gluino and quark with a imple SUSY model and they are excluded with mae below about. TeV [8]. By conidering the dicovery of a Higg-like particle at around 6 GeV and natural SUSY cenario, the ma of top i expected to be up to about (3 4) Higg ma at mot. Stop particle are earched in the t b χ,

9 t m χ m χ χ W χ and t t χ channel with variou ma value of χ. Figure (right) how reult from the former channel and mot of intereted region in the natural SUSY i excluded [9]. Both ATLAS and CMS alo earch for new particle and enhancement with variou BSM, for example, model with extra-dimenion. Such earche alo excluded model with a ma cale of roughly 3 TeV. quark ma Squark-gluino-neutralino model, m(χ ) = GeV L dt =.8 fb, =8 TeV -lepton combined SUSY Oberved limit ( σ ) theory Expected limit ( σ exp ) Oberved limit (4.7 fb, 7 TeV) gluino ma + GeV 4 3 ~ ~ t t L int ~ production, t b+ χ, χ W + χ Oberved limit Oberved limit (σ theo ) m ~ = 6 GeV = 4.7 fb = m χ = 6 GeV = GeV = m ~ t - GeV = m χ < mb+ ( = m + GeV) χ < 6 GeV m ~ t < mb+ ( m = χ L int = 3 fb L int = GeV = 3 fb L int = 3 fb = ) L int =8 TeV L ATLAS-CONF-3- - L ATLAS-CONF-66 L ATLAS-CONF-67 L ATLAS-CONF-66 = m ~ t - GeV = 3 fb = 4.7 fb Statu: December =7 TeV Expected limit m = + GeV χ L int =.8 fb < 3. GeV L int - L [8.43], -L [9.] - - -L [9.] m~ t FIG. : Excluion limit with a implified MSSM cenario with only trong production of gluino and firt- and econdgeneration quark decaying into jet and neutralino (left) [8] and with variou top earche (right) [9]. V. FUTURE PROSPECT LHC experiment will be upgraded to perform intereting phyic program a much a poible. LHC accelerator will be upgraded for the deign energy ( =4 TeV) and luminoity ( 34 cm and fb per year) and alo to get a higher luminoity of 34 cm, which i called high luminoity LHC (HL- LHC) and planned from. Table I ummarize the LHC chedule including HL-LHC. The HL-LHC i not approved yet but i expected to be oon. In the HL-LHC, we will take data until 3 fb, which i neceary to addre the Higg elf-coupling and o on. In parallel ATLAS and CMS detector will be and mut be upgraded to take data under uch higher luminoity condition. For example, the pixel and ilicon trip detector (and alo TRT at ATLAS) will be replaced due to radiation damage (and occupancy iue) and everal electronic will be replaced and improved to reduce background and improve meaurement of jet and miing-energy under higher pile-up condition. The precie meaurement of the propertie of the new boon, in particular coupling, i very important at the HL-LHC. Figure 6 (left) how expected preciion on the ratio meaurement of Higg boon partial width without theory aumption on the particle content in the Higg loop or total width. The improvement with a factor of 3 i expected for thee meaurement with data of 3 fb []. We alo tudied the poibility of the Higg trilinear elf-coupling meaurement with 3 fb data in the H( b b)h( W W ) and H( b b)h( γγ) channel, which look promiing with further tudie in future []. Direct BSM earche were tudied for the LHC of 3 fb and the HL-LHC. Figure 6 (right) how both dicovery and excluion region of gluino and quark with mae and ma cale of up to 3 TeV can be invetigated []. TABLE I: LHC chedule 3 4 Shutdown for the deign energy (4 TeV) 6 =34 TeV, up to 34 cm, - fb per year to get fb 8 Phae-I upgrade for the full deign luminoity ( fb per year) 9 =34 TeV, up to 34 cm, fb per year to get 4 fb Phae-II upgrade for the high luminoity run ( 34 cm ) 3 =34 TeV, up to 34 cm, take data until > 3 fb

10 (Simulation) = 4 TeV: / Γ g Γ Z / Γ g Γ t / Γ µ Γ τ Ldt=3 fb ; Ldt=3 fb Ldt=3 fb extrapolated from 7+8 TeV m g ~ 4 3 Squark-gluino grid, m LSP =. = 4 TeV 3 fb 3 fb 3 fb 3 fb dicovery reach dicovery reach excluion 9% CL excluion 9% CL σ [pb] - / Γ Z Γ µ 3-3 / Γ Z Γ τ -4 Γ W / Γ Z / Γ Z Γ γ Γ g Γ / Γ Z H (Γ /Γ Y ) (κ /κ Y ) X X ~ Γ X /Γ Y κ X /κ Y (imulation) m~ q - -6 FIG. 6: Expected meaurement preciion on the ratio of Higg boon partial width (left) [] and excluion limit and dicovery reach in a implified quark-gluino model with male neutralino (right) []. VI. SUMMARY LHC ha finihed the firt run period with a great ucce. One of LHC phyic goal, Higg dicovery, wa achieved in. Thi Higg-like boon particle i oberved at around 6 GeV. Coupling to gauge boon and fermion are meaured and there i no deviation from the SM Higg with the preent preciion. The pin of thi new particle i alo meaured and the data favor +. However the preent preciion of thee meaurement are not good enough to conclude if thi new particle i the SM Higg or a piece of BSM. In addition there i no hint of BSM with direct earche for SUSY etc. With the retart of phyic run in with =3/4 TeV, thee thing will be improved. LHC i a long on-going and intereting project until 3 fb of data will be taken to addre, for example Higg elf-coupling while reult from 3/4 TeV colliion are important for the deciion of the future experimental particle phyic. [] F. Englert and R. Brout, Phy. Rev. Lett. 3 (964) 3. [] P. Higg, Phy. Rev. Lett. (964) 3, Phy. Rev. Lett. 3 (964) 8. [3] G. S. Guralnik, C. R. Hagen and T. W. B. Kibble, Phy. Rev. Lett. 3 (964) 8. [4] L. Evan and P. Bryant, JINST, 3 (8) S8. [] ATLAS Collaboration, Phy. Lett. B76 (). [6] CMS Collaboration, Phy. Lett. B76 () 3. [7] ATLAS Collaboration, JINST, 3 (8) S83. [8] CMS Collaboration, JINST, 3 (8) S84. [9] LHC Higg Cro Section Working Group, CERN-- and CERN--. [] ATLAS Collaboration, ATLAS-CONF-68. [] ATLAS Collaboration, ATLAS-CONF-69 and CMS Collaboration, CMS-PAS-HIG-4. [] ATLAS Collaboration, ATLAS-CONF-8 and CMS Collaboration, CMS-PAS-HIG-4. [3] ATLAS Collaboration, ATLAS-CONF-6 and CMS Collaboration, CMS-PAS-HIG-44. [4] ATLAS Collaboration, ATLAS-CONF-6 and CMS Collaboration, CMS-PAS-HIG-43. [] ATLAS Collaboration, ATLAS-CONF-7 and CMS Collaboration, CMS-PAS-HIG-4. [6] ATLAS Collaboration, JHEP (3) 9 and CMS Collaboration, CMS-PAS-HIG-. [7] ATLAS Collaboration, JHEP 6 () 39 [8] ATLAS Collaboration, ATLAS-CONF-9. [9] ATLAS Collaboration, Phy. Rev. Lett. 9 () 8, Phy. Rev. Lett. 9 () 83, JHEP () 94, ATLAS-CONF-66, EPJC 7 () 37, Phy. Lett. B7 (3) 3, ATLAS-CONF-67, ATLAS- CONF-3-. [] ATLAS Collaboration, ATLAS-PHYS-PUB--, ATLAS-PHYS-PUB--4, ATLAS-PHYS-PUB-3-, ATLAS-PHYS-PUB-3-.