A SSOCIATED TOP PRODUCTION (tt +V, t +V ) IN ATLAS AND CMS

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1 S ERGIO S ANCHEZ C RUZ FOR THE ATLAS AND CMS C OLLABORATIONS Renconres de Moriond 08 A SSOCIATED TOP PRODUCTION ( +V, +V ) IN ATLAS AND CMS

2 σ [pb] Producion Cross Secion, 3 Sepember 07 =n je(s) CMS Preliminary - 7 TeV CMS measuremen (L 5.0 fb ) - 8 TeV CMS measuremen (L 9.6 fb ) - 3 TeV CMS measuremen (L 35.9 fb ) Theory predicion CMS 95%CL limis a 7, 8 and 3 TeV 3 All resuls a: hp://cern.ch/go/pnj7 j j 3j 4j W -ch s-ch γ Zq W Z H Will cover several channels of associaed producion Low cross-secion processes bu crucial for undersanding of EWK symmery breaking Also background for many searches and SM measuremens Page

3 +Z PRODUCTION IN CMS Sensiive o Z boson coupling o op quarks Measuremen of +Z in 3l and 4l regions Classes depending on he number of jes and b-jes in 3l WZ processes esimaed and validaed in conrol regions Signal exraced by performing a ML fi arxiv: g Z/γ g σ SM = ± 0. pb Page 3

4 +W PRODUCTION IN CMS d g d u σ SM = 0.68 ± 0.08 pb W + arxiv: Measuremen of +W in he lss channel BDT rained o discriminae signal from all he backgrounds using kinemaic variables Daa-driven esimaion of main background: non-promp lepons 0 independen measuremen regions Signal exraced by performing a ML fi Evens CMS fb (3 TeV) Daa W Z Nonpromp WZ ( )X Rare Charge mis-id 00 Conrol region Signal region 0 Page D

5 RESULTS AND EFT INTERPRETATIONS [pb] Z σ CMS 35.9 fb (3 TeV) V bes fi 68% CL conour 95% CL conour V heory [] σ [pb] W - lnl - lnl W heory 68% 95% σ W [pb] Z heory 68% 95% σ Z [pb] arxiv: Observaions consisen wih SM expecaions wihin sigma Above 5 observed sandard deviaions for all processes Sensiiviy for W + and W New physics can affec +W and +Z cross-secions Consrains on Wilson coefficiens for 8 dimension 6 operaors Page 5

6 +V PRODUCTION IN ATLAS Eur. Phys. J. C77 (07) 40 Evens 3 ATLAS s = 3 TeV, 3. fb Daa 05 W Z WZ Pos Fi ZZ Oher Fake lepons Uncerainy +W measuremen in µ ± µ ± and 3l regions: +Z measuremen in 3l and 4l 4L DF b 4L DF b 4L SF b 4L SF b 3L noz b 3L Z b3j 3L Z b4j 3L Z b4j µ SS 4L ZZ CR 3L WZ CR Daa-driven approach o esimae fake lepons / simulaion correced by daa WZ producion esimaed hrough simulaions evaluaed in daa Page 6

7 ATLAS RESULTS Eur. Phys. J. C77 (07) 40 Z cross secion [pb] ATLAS - s = 3 TeV, 3. fb ATLAS bes fi ATLAS 68% CL ATLAS 95% CL NLO predicion Z heory uncerainy W heory uncerainy Simulaneous fi o signal and conrol regions Resuls compaible wih Sandard Model expecaion 3.9 (3.4) σ expeced (observed) in +Z 0.5. (.0) σ expeced (observed) in +W W cross secion [pb] Uncerainies dominaed by saisical uncerainies Page 7

8 TTγ PRODUCTION CMS Measuremens of he fiducial +γ cross-secion Evens are required o have a leas lepon, jes and one phoon Backgrounds are evens wih a non-promp phoon Non evens wih a promp phoon JHEP (07) 006 σ fid +γ = 7 ± 7 fb R = (5. ±.) 4 ATLAS JHEP (07) 086 σ fid = 39 ± 8 fb Differenial cross-secion unfolded o paricle level Page 8 Resuls compaible wih SM expecaion

9 FOUR TOPS PRODUCTION CMS Process sensiive o y coupling Evens wih a leas a same-sign dilepon pair and hadronic aciviy σ = fb Significance:.6 σ (.0 σ) Eur. Phys. J. C 78 (08) 40 ATLAS-CONF Upper limi on y /y SM <. ATLAS g g σ SM = fb Evens wih one lepon and large je mulipliciy Evens ATLAS Preliminary - s = 3 TeV, 3. fb Pre-fi Daa 05 + cc Non- Conrol Regions g g (SM) + bb Uncerainy + ligh + V / H Signal Regions H σ() (fb) CMS Obs. upper limi Obs. cross secion Prediced cross secion, Phys. Rev. D 95 (07) fb (3 TeV) Daa / Pred j,b 5j,3b 5j, 4b 6j,b 6j,3b 6j, 4b 9j, 4b j,3b j, 4b 30 0 Upper limi on producion: (6) Page y /y SM σ SM

10 W -CHANNEL CMS ANALYSIS Sensiive o b pdfs Inerference wih a NLO Background for producion Measuremen in he e+µ channel Challenging due o overwhelming presence of BDT rained in he jb and jb regions BDTs and subleading je p T in he jb region used o exrac signal in a ML fi CMS-PAS-TOP-7-08 g W g b σ SM = 7.7 ±.8 ± 3.4 pb Evens 5 3 CMS Preliminary e ± µ + jb ± Daa Non-W/Z DY Posfi uncerainy Prefi Daa/MC fb, W s = 3 TeV VV+V Prefi uncerainy Page Daa/MC jb BDT oupu bin

11 W INCLUSIVE RESULTS Evens 3 CMS 0 Preliminary Daa/MC ATLAS e ± µ ± fb, s = 3 TeV Daa W Non-W/Z DY VV+V Uncerainy (0, 0) (, 0) (, ) (, 0) (, ) (, ) ( 3, 0) (Number of jes, number of b-agged jes) JHEP 0 (08) 63 CMS 63. ± 3% (sa.) ± 9% (sys.) ± 3% (lumi) pb CMS-PAS-TOP-7-08 Deerminaion wih % uncerainy Similar mehodology used by ATLAS (smaller daase) σ W = 94 ± (sa.) +8 (sys.) ± (lumi.) pb Uncerainy of he order of 30% Boh measuremens consisen wih SM expecaion = 7.7 ±.8 (scale) ± 3.4 (pdf) pb σ SM W Page

12 DIFFERENTIAL W MEASUREMENT arxiv:7.060 Evens / ATLAS Daa 8000 W s = 3 TeV, 36. fb 7000 jb Z +jes 6000 Ohers Daa/Pred..5 Toal sys. unc BDT response (/σ)(dσ/de(b))[gev - ] Pred. Daa Pred. Daa ATLAS s = 3 TeV, 36. fb Powheg+Pyhia6 (DR) amc@nlo+herwig++ Daa Toal uncerainy Powheg+Pyhia6 (DR) Powheg+Pyhia6 (DS) Powheg+Herwig E(b)[GeV] (/σ)(dσ/dm(l b))[gev - ] Pred. Daa Pred. Daa ATLAS s = 3 TeV, 36. fb Powheg+Pyhia6 (DR) amc@nlo+herwig++ Daa Toal uncerainy Powheg+Pyhia6 (DR) Powheg+Pyhia6 (DS) Powheg+Herwig m(l b)[gev] Differenial measuremen performed on a signal enhanced region defined by he BDT used in he inclusive measuremen Disribuions unfolded o paricle level Allows o compare diagram subracion and removal prescripions Boh prescripions are compaible wih daa Page

13 Zq PRODUCTION IN ATLAS arxiv: Direc probe of op coupling o Z Sensiive o WWZ coupling σ SM (Zq) = 80 fb [ Z anyhing] Enries / ATLAS - s = 3 TeV, 36. fb Daa Zq +W Z +jes Diboson V+H+WZ Uncerainy Measuremen in evens wih 3l Fakes from DY+fake using a daa-driven mehod Fakes from using simulaions and correced in CR ANN rained o discriminae signal from backgrounds bu Daa / Pred O NN Signal exraced by performing a ML fi o ANN disribuion Page 3

14 Zq PRODUCTION IN CMS Evens / 0. 3l wih a Z candidae Three regions of ineres: b-je (signal enriched region) b-je ( +Z enriched region) 0 b-agged (non-promp lepon enriched) CMS bje Evens / 0. CMS 30 bjes 0 BDT rained agains WZ, +V and ZZ using op and Z reconsrucion MEM weighs added o increase BDT performance Phys. Le. B 779 (08) 358 Three regions of ineres included in he fi Evens / 5 GeV CMS 0bje fb (3 TeV) Daa Zq NPL WZ H+W Z ZZ WZ+c WZ+b WZ+ligh Pulls BDT oupu Pulls σ SM (llq) = 94 fb [ l = e, µ, τ] BDT oupu Pulls m W T [GeV] Page 4

15 RESULTS Zq ATLAS µ = 0.75 ± 0.(sa) ± 0.7(sys) ± 0.05(h) σ((z anyhing)q) = 600 ± 70(sa.) ± 40(sys.) fb Significance obs (exp): 4. (5.4) σ Evidence for Zq producion Enries / 0. Daa / Pred ATLAS s - = 3 TeV, 36. fb Daa Zq +W Z +jes Diboson V+H+WZ Uncerainy O NN CMS µ = (sa) (sys) σ(llq) = (sa)+9 3 (sys) fb Significance obs (exp): 3.7 (3.) σ Evidence for Zq producion Page 5 Differen modeling of signal and differen reamen of fakes

16 CONCLUSIONS Review of experimenal resuls on associaed op producion Experimens are consolidaing observaions of +Z and +W producion Inerpreaion of he resuls in erms of EFTs Saring o have sensiiviy o producion Evidence for Zq producion for he firs ime Already hiing he precision fronier in measuremens of W producion Keep uned for more ineresing resuls! Page 6

17 Back-up Page 7

18 DIFFERENCES IN TZQ BETWEEN ATLAS AND CMS Signal modeled wih LO normalized o NLO, while CMS uses NLO aking Differen modeling of je mulipliciy LO signal more prone o populae regions wih higher signal/background Differen b-agging performance in he wo deecors Differen approach in he esimaion of fake lepons CMS no raining BDT agains he fakes Page 8

19 TTV EXTRA PLOTS Page 9

20 TTV WILSON COEFFICIENTS Page 0

21 TTV WILSON COEFFICIENTS Page

22 TTV SYSTEMATICS Page

23 W -CHANNEL SYSTEMATICS Page 3