2019年最新-Kaluza-Kleinecitationofgluon膠子的卡魯扎-克萊因激勵(lì)-精選文檔

1、as with XD & Kaluza-Kleinexcitation of gluon at ATLASExotic signals at Hadron Colliders 04Marc Escalier, LPNHE ParisResults within the ATLAS experimentExotic signals at Hadron Colliders 04 ,Durham5040302010emMSSM + XDweakXD: the models4-oo（叼2）=工超（如）一力計(jì)=+ n2M72=OQp ih時(shí)R3/R2/R ADD large XD （mm） Rcl Te

2、V1 M館卄嚴(yán) Small XD （TeV1） （Antoniadis） Randal- Sandmm0Ill our model, gauge bosons can propagate in XD modification of the RGE（E Dudas, R. Dienes, T. Ghergetta, hep/ph 9803466 and hep/ph9807522） Mgvt30 TeVStrong . for（4+2）d and R=l/10 TpV1050001000015000ZDOOO2500030DOOHierarchy problem can be solved!De

3、tection of KK excitations of gauge bosons Obseivation of deviations of a Obseivation of resonancesgluon- qq? most abundant T-as difficult to detect over QCD jet bck Y, Z G. Azuelos and G. Polesello 一 proceedings of the Workshop “Physics at TeV colliders,Les Houches, May 2019 - hep-ph/0204031, ATL-CO

4、M-PHYS-2019-004G. Polesello, M. PlataQi Qj qx qjQiQi Qi qAq 貞j F %厲Feyimian diagrams for dijets production involving KK excitations Qi Qi qx q】Modification of the coupling constantC. Balazs and B. Laforge. Probing (ev-scale gauge unification by hadronic collisions. Phys. Lett., B525:219-224,2002.Hig

5、h Energy theory at (4+8)D Effective theory at 4D with Kaluza-Klein excitations of gauge bosons (fermions can also exist but are not considered in thefollowing)q+kSM : % (P)- % (W)2兀 ln mzpvq(&i, &2, &3) = (33/5,1,-3) MSSM+XD :2rA2dtTit(乙123)= (3/5： 3, -6) + 耳(4,4, 4)r = 7T (Xs)2/Sooex詢(丁) = X exp(7r

6、irn2t/25r(5/2)Jacobi function : 4X& =(1 + 6/22、Data analysis at LHC What can we measure ?2 competitive effects: KK excitations make the cross-section to increase decrease of a makes cr decrease at high Mc (counterbalance effect of KK)Influence of as (dominant for high Mc)10N =Mg dcySMdcyXD.dM j jJ M

7、gdMjj(1M.j jC10 1110 9Mmax da*MTT7-d,MjjdaXD dM =rrtin 計(jì)G)daSM dMT；2000：40006000|dijet mass GeV/c2MmindMjjNa = C- 8000 10000Mmin(pairofjet) (GeV)Mmax (well take 14 TeV)Mmin dMjjReachable R1 (GeV) for different scenarii (Nsmax 5)Accelerator5=2E6Tevatron940980LHC1014010200I31Ns M NX D7Nsm|GeVLimits: i

8、nfluence of KK in the propagator ?KK gluon propagatorD. A. Dicus, C. D. McMullen, and S. Nandi. Collider implications of kaluza-klein excitations of the gluons. Phys. 065:076007,2002.N力(0)propagator of n-KK resonancecnn=0 SMcn0=2 mn=ii/R c0=l? n=0: SM gluon rn-2asmn Pn=P2-J rn=f(as)%=f(rj Cross-sect

9、ions -|M|2 (amplitude square)2 D茁3)2+D冊(cè)(P)D冷(g)NEm,n=0mnPmQn +n)(Pm)2 + mrnrrn)(?n)2 + mnFn)Implementing XD into Pythia(done at Les Houches 2019) XD function from C. BalazsM /m Me is compactification scale/ s c Ms cutoff scalelz / ( ( r-k ( “址卩)計(jì)2曲)如(切+嗆嗆(叫=層o (祐2；歸詼冊(cè)+ 7再：j m,n=0massless gluonEGPn =

10、肛祖1 - M?：陀嚴(yán)(MI2 -EGPi.i = EGB訓(xùn):Mil -応*3：嚴(yán)*2 +斑i*2*G*3】lEGPij = EGPjj/(H2 - Mj*2)*2 + Mj*2*Gj*2)EGPij =fl*GPyPropagator S, Srn=2(Xsmn8IF(ISUB.EQ. 11 .OR.ISUB.EQ. 12)THENSQDQQT=EffGluProp(TH,TH,XKKL(l),XKKL(2) REDQST=EffGluProp(SH,TH,XKKL(l),XKKL(2) SQDQQU=EffGluPiop(UH,UH,XKKL( 1 ).XKKL(2)REDQTU=EffG

11、luProp(UH,TH,XKKL(l),XKKL(2)SQDQQS=EffGluProp(SH,SH.XKKL(l),XKKL(2)ENDIFCross-section deviationsQrrPsm (pb)jetsatLHCMs=50TeVto4 rIO2idsymbol-Dicus, McMullen, ISsndi 1 TeV3TeV。5TeV，7TeV9TeVhisto-MC wilh XD 1TV 3 TeV 5 TeV口 7 TeV 9 TeV-SM三二二一-三三一一 _三三二-三三二一三No ninning of alpha_s hereUs: CTEQ6L1Dicus e

12、t al: CTEQ3MObseivation up to M 15 TeV0200 400 600 800 1000 1200 1400 1600 1500 2000 2200 2400 2600 2800 3000 3200 3100 36004102 contribs: propagator+coupling (as)m,n=0 和絆dt74聽s=聽認(rèn)）-詈山才魯l嚴(yán)I I1 I11 I1 IIllijcls atLHCMs=50TeVsymbclOicus McMullen, Mandihisto=MC with XD 1 TeV I TeVProcesses 11,0200 400

13、600 800 1000 1200 1400 L600 (800 20IM1 2200 24M 2600 2800 3000 3200 3* 3600 3 TeV。5 TeV3 TeV5 TeV亠 7 TeV 9 TeV tSM7 TeV9 TeV SM0200 4d0 (WO 5500 IWQ 1200 1400 1600 (800 2000 220000 2600 2800 3000 3200 WOO 3600i I i i I I i i i i I i jets atLHCMs=50TeVhita=ftic with XD ITeV 3 TeV 5 TeVI I 7 TeV 9 TeV

14、SMN2 d茁(q)d幼+ d筋(q)d冷= 刀mnPmQn +n)(Pm)2 + mrnrrn)(?n)2 + mnFn)6With ninningAll processesd茁(q)2+ d冊(cè)(q)d冷(q)= 刀-1/ X _-1/ bi - hi 卩m,n=0 k rr/,o2 m772-2 tmnPmQn +n)(Pm)2 + mrnrrn)(?n)2 + mnFn)(爲(wèi))ihs 石ii i i i i i i i i ijets atLHCMs=50TeVa numingEg-1TV 3TeV 5TeV 7TeV 9TeVAll processe0 200 400 600 800

15、LOGO 1200 1400 1600 1800 2000 2200 2400 2600 2800 3000 3200 3400 36000600 W 1000 1200 WOO 1600 lQQ 20l 2200 N0Q 26OJ 2SW0 3000 32IW 3400 300Frew 3.i(G 的a=f(T) and r=f(a ) iterative processeven麻1000(19OJQ800070006G0Q50004G0Q300(1200(1LGOQ|Nsm xd Slgmf= xAW ance)S/sqrt(B):15997?9aresonance difficult t

16、o observe over qcd backgroundI I I I I I I I I I I I I I700 725 750 775 80) 825 85U 875 S)W 925 950 975 10001Q251051) 1U751 IO)LI2511501175L2OT Sqft(s)Strategy : enhance s-channel contribu+ionSearch for extra-dimensions : Kaluza-Klein resonance production in s-chaimel background QCD background is t-

17、chamiel idea: use (s,t) Mandelstam variables distributions to reject s chaimel from t channel contributions ?%(?)s chaimelleptons :E=c stt channelt Mandelstam variable (t or u=k)x 10 2100001500020000, 25000 30000 3500040000K5 1J 6.0 廠0占、qd)“poo.5000100001500020000 25000 30000 3500040000KCGeV2)500010

18、0001500020000 25000 3000035000 40000K(GeV-2 o.5 10.1o- d、qd 遼 PGPPlp2Protons: need to reconstmct x1? x2P4 Take best reconstmctedvariable t or 11For min|t1-t,1|;|t2-t,2|? take:t = (tfH)/2P3protons kinematics with jets: reconstmction of x“ _ E3+E4+Q311+Q4111 /ndf 38.14 i 21200 SJUtvAao02Z 2p2+_（b3ll+M

19、ll）S/T-U channelsThe idea is not to separate s chamiels from t/u, it is just to see if there is special behaviour for s channel and t/u0 0 000 03XEkvinroirtfAs= 1 TeV, Cteq6L 1，AQCD correctIIIIISubprocessINumber of pointsISigma IIIIITIT(mb)I111IIIII NioTypeIGeneratedTried IIIIIIIII0Allincluded subpr

20、ocessesI100000252545 I4.918E-02 I:11f +f - f + f (QCD)I1457034640 I7.111E-03 【i2* +fbar - F1 + fbar*InrTTQ+OOOE+QO 113f +fbar - q + qI00 IO.OOOE+OO I28f +9 - f + 9I55260139044 I2 + 723E-02 |也Q +q - f + fbar1TTT久20化-陽1689 +9 - 9 + 9I3016978859 Il+484E-02 |81q十qb呂廠- Q + lbarz massIIFITTO.OOOE+OO 1I 829十g - Q + Qbar, massive I01 I5.444E-13 II 96Sernihard QCD 2 - 2I00 IO+OOOE+OO IIIII5=OQQQQOQPQQ0Q0X)1 QimpHEPvnrslon 41.10 Xelcte,On/of f z Restore, La tex z GhostDELDELDfib訂 網(wǎng)】).F2-ton. PqllD.PQDnEiulinterferenceqgqgk distributio