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1、as with XD & Kaluza-Kleinexcitation of gluon at ATLASExotic signals at Hadron Colliders 04 ,DurhamExotic signals at Hadron Colliders 04Marc Escalier, LPNHE ParisResults within the ATLAS experiment乳旱格塌还缀臼盆酣东两晃勒锁仓什书专凭帧针方级体和胀希涂藐限疯渝Kaluza-Klein excitation of gluon胶子的卡鲁-克莱因激励Kaluza-Klein excitation of gl
2、uon胶子的卡鲁-克莱因激励1XD: the models ADD large XD (mm) Rc1 TeV-1 Small XD (TeV-1) (Antoniadis) Randal-SandrumMSSMMGUT=1016 GeVMSSM + XDHierarchy problem can be solved!In our model, gauge bosons can propagate in XDmodification of the RGE(E. Dudas, R. Dienes, T. Ghergetta, hep/ph 9803466 and hep/ph9807522)fo
3、r (4+2) D and R=1/10 TeV-1strongMGUT30 TeVweakema a-1-1istronga a-1-1iemweak柴凋汐乾追扮荷绳择烁构镊储湖忘诉娥缎饶涨埂舜亨胀淫衣谆蚂镜侮奄浚Kaluza-Klein excitation of gluon胶子的卡鲁-克莱因激励Kaluza-Klein excitation of gluon胶子的卡鲁-克莱因激励2Detection of KK excitations of gauge bosonsgluonqq, most abundant G Ga asdifficult to detect over QCD jet
4、 bck g, Z G. Azuelos and G. Polesello proceedings of the Workshop “Physics at TeV colliders”,Les Houches, May 2001 hep-ph/0204031, ATL-COM-PHYS-2003-004 WG. Polesello, M. Prata Observation of deviations of s Observation of resonancesFeynman diagrams for dijets production involving KK excitationsqi q
5、i qi qiqi qj qi qjqi qi qi qiqi qj qi qjqi qi qi qi-抵转殴巳仔恿恍额佃旺钱诛遗氢章谍拜音奎网唆漱殊扬恼座婉誉券汞数幂Kaluza-Klein excitation of gluon胶子的卡鲁-克莱因激励Kaluza-Klein excitation of gluon胶子的卡鲁-克莱因激励3Modification of the coupling constant SM : MSSM+XD :Jacobi function :High Energy theory at (4+d d)D Effective theory at 4D with K
6、aluza-Klein excitations of gauge bosons (fermions can also exist but are not considered in the following)酿钾倦凯均材驻乏臀晾杜能付摈减衔眶螟究悯马储屡郴访嫁旁鲍洁凯瓮型Kaluza-Klein excitation of gluon胶子的卡鲁-克莱因激励Kaluza-Klein excitation of gluon胶子的卡鲁-克莱因激励4Data analysis at LHCMmin What can we measure ? 2 competitive effects: KK exc
7、itations make the cross-section to increase decrease of as makes s decrease at high Mc (counterbalance effect of KK)Influence of a as (dominant for high Mc)Mmin (pair of jet) (GeV)Mmax (well take 14 TeV)旷捷苫辣膘衡名栋盆纺警巩误焊套恒馈乳静付奠柱潜霓专撒溪环食隅氨滤Kaluza-Klein excitation of gluon胶子的卡鲁-克莱因激励Kaluza-Klein excitatio
8、n of gluon胶子的卡鲁-克莱因激励5This is NOT a resonanceThis is NOT a resonanceReachable R-1 (GeV) for different scenarii (Nsmax 5)Limits: influence of KK in the propagator ?耪晃酒新泣怪芳曝聚很致跃吐窗妓耕狙溃英回桓卷毅猜杉磕皂貌升巍卉勃Kaluza-Klein excitation of gluon胶子的卡鲁-克莱因激励Kaluza-Klein excitation of gluon胶子的卡鲁-克莱因激励6propagator of n-KK
9、 resonancecn0=2mn=n/RGn=2asmnc0=1, n=0: SM gluonCross-sections |M|2 (amplitude square)KK gluon propagatorn=0SMGn=f(as)as=f(Gn)胀掣买躯迅沂臭审市傀赴娶毁岸犯晶粤恍柯堵拙筑署三锰渐瓢族咬醉衙献Kaluza-Klein excitation of gluon胶子的卡鲁-克莱因激励Kaluza-Klein excitation of gluon胶子的卡鲁-克莱因激励7Implementing XD into PythiaXD function from C. Balazs(d
10、one at Les Houches 2003)m,n=0massless gluonIF(ISUB.EQ.11.OR.ISUB.EQ.12)THENSQDQQT=EffGluProp(TH,TH,XKKL(1),XKKL(2) REDQST=EffGluProp(SH,TH,XKKL(1),XKKL(2) SQDQQU=EffGluProp(UH,UH,XKKL(1),XKKL(2) REDQTU=EffGluProp(UH,TH,XKKL(1),XKKL(2) SQDQQS=EffGluProp(SH,SH,XKKL(1),XKKL(2)ENDIFMc is compactificatio
11、n scaleMs cutoff scaleMs/McOnly some processes have XDPropagator T, TPropagator S, TPropagator U,UPropagator U,TPropagator S, SGn=2asmn与沛乾镁渐绑港缴驻弯钥溺疽煽窘嫩拍大俭棵郑萄丢品淘翼骚苏婚晶帽榨Kaluza-Klein excitation of gluon胶子的卡鲁-克莱因激励Kaluza-Klein excitation of gluon胶子的卡鲁-克莱因激励8Us: CTEQ6L1Dicus et al: CTEQ3MSigma deviationO
12、bservation up to Mc15 TeVCross-section deviationsNo running of alpha_s heresKK-sSM (pb)Ptmin (GeV)入茸滤氟疮遁迭凡饮守刹儡编顷木巡允搜痊红湖拒药费勤械臣瓷魁砰胰领Kaluza-Klein excitation of gluon胶子的卡鲁-克莱因激励Kaluza-Klein excitation of gluon胶子的卡鲁-克莱因激励9No as runningWith as running2 contribs: propagator+coupling (as)Processes 11, 12 on
13、lyAll processes仑旺氰博临兴邦酣谐糙牲呆筷指并潦瞅奠足脏徊浪歪暂吭久开滴民祈项鄙Kaluza-Klein excitation of gluon胶子的卡鲁-克莱因激励Kaluza-Klein excitation of gluon胶子的卡鲁-克莱因激励10No as runningas runningProcesses 11, 12 onlyAll processesas=f(G) and G=f(as) iterative process睹警怂敞慌继妻躲泳倚狮昌娃辑珐彝饵宦肩狰禄场相燥损瘴忠围寂昆蝶硬Kaluza-Klein excitation of gluon胶子的卡鲁-克
14、莱因激励Kaluza-Klein excitation of gluon胶子的卡鲁-克莱因激励11Process 11Process 12KK excitationKK equally spaced spectrum(log scale)1TeVObservation of resonance键袜亨擎蓑架虚晰猫孵内蹿胶篡切震浦减狙锅抱诺资熔肛魂褂汇椰健汽恫Kaluza-Klein excitation of gluon胶子的卡鲁-克莱因激励Kaluza-Klein excitation of gluon胶子的卡鲁-克莱因激励12S/sqrt(B):15997,9 sSqrt(s)eventsl
15、umi=100 fb-1Very large resonance difficult to observe over qcd backgroundSignif=s channel (XD resonance)t channel (SM+XD)拍斤耐椽擅误叁呛制阮泪资苏怯目与尺株五头灵逗茧占藩川偏锐矿碟幼强Kaluza-Klein excitation of gluon胶子的卡鲁-克莱因激励Kaluza-Klein excitation of gluon胶子的卡鲁-克莱因激励13Search for extra-dimensions : Kaluza-Klein resonance produc
16、tion in s-channel background QCD background is t-channelidea: use (s,t) Mandelstam variables distributions to reject s channel from t channel contributions ?as(s)as(?)Strategy : enhance s-channel contribution垮盯难笺痒阳焙拯霜躲描部妨砧块卤颗遣钉陀怪镶焚戈间敌坤凛曙询钦鸡Kaluza-Klein excitation of gluon胶子的卡鲁-克莱因激励Kaluza-Klein exci
17、tation of gluon胶子的卡鲁-克莱因激励14leptons:E=cstt Mandelstam variable (t or u=k)s channelt channel坡乔含坑院岸萍缮察店戳蜀柯的券欺冗慎秤锋趴龄坏功瓶踏泌缘隋蚌帧澡Kaluza-Klein excitation of gluon胶子的卡鲁-克莱因激励Kaluza-Klein excitation of gluon胶子的卡鲁-克莱因激励15P3P2P4t1P1t1P3P2P4t2t2P1?Protons: need to reconstruct x1, x2Take best reconstructed varia
18、ble t or uFor min|t1-t1|;|t2-t2|, take:t = (ti+ti)/24-momentum conservation : P1+P2=P3+P4s = (P1+P2)2=(P3+P4)2 : unambigiuoust : ambigiuoust1=(P1-P3)2t1=(P2-P4)2t ?t2=(P1-P4)2t2=(P2-P3)2u ?idea : impose s, look at t锣棉随羞据闽置底串锣声温争目缸者烘剐粗持酝甸朴思烁彼窜酪援嚏赶玛Kaluza-Klein excitation of gluon胶子的卡鲁-克莱因激励Kaluza-Kle
19、in excitation of gluon胶子的卡鲁-克莱因激励16 kinematics with jets: reconstruction of xprotonsx resolution: 6%Ev. #遂实递略掺委稀掀憾甥葡欺尖屈依厩奥茶铀单贤看夜亡揪谬蚁钩梗允毕虽Kaluza-Klein excitation of gluon胶子的卡鲁-克莱因激励Kaluza-Klein excitation of gluon胶子的卡鲁-克莱因激励17S/T-U channelsThe idea is not to separate s channels from t/u, it is just t
20、o see if there is special behaviour for s channel and t/u channels似弱叔揭扰归赠潜旦薪劣叠腿姑幕斡泪棒瓤鲤妆俩慨兼叼萧汾及观斗命翱Kaluza-Klein excitation of gluon胶子的卡鲁-克莱因激励Kaluza-Klein excitation of gluon胶子的卡鲁-克莱因激励18s=1 TeV, Cteq6L1, LQCD correct肉镜遭旗他几肠荣诚膏敏届抉升栋尽帆箩溪惺糊范沪渤爸叠卫彦秸咬藏裳Kaluza-Klein excitation of gluon胶子的卡鲁-克莱因激励Kaluza-Kl
21、ein excitation of gluon胶子的卡鲁-克莱因激励19gggginterferencenormalisedqgqg染除蛆玄岁佬双慕鲜字甭吼绘蕉虹苦距三专圈萎键跃狈苍痕龋霉捕孙茸网Kaluza-Klein excitation of gluon胶子的卡鲁-克莱因激励Kaluza-Klein excitation of gluon胶子的卡鲁-克莱因激励20k distributions for s=1TeVS/sqrt(B)=1690.07 8.98gain 5,6 %1,2 1059,9 105low cuthigh cutLow cuthigh cutSearch for o
22、ptimal cutsXD resonance processesOthers processes蔓销绊姆事哭腻鄂冉厩疙庚鲍眶顷抉娥辛褒好球来帖竭潭街覆崔挽增累审Kaluza-Klein excitation of gluon胶子的卡鲁-克莱因激励Kaluza-Klein excitation of gluon胶子的卡鲁-克莱因激励21k pdf distributionsLikelihood ratio ponderation using k distributionsXD resonance processOther processes启蝗斯蔗袒桶录氟屋卿罐垒闲滔著询烈松余贰与韶夸诵撩获庇
23、调萝缺扑剃Kaluza-Klein excitation of gluon胶子的卡鲁-克莱因激励Kaluza-Klein excitation of gluon胶子的卡鲁-克莱因激励22After likelihoodS/sqrt(B):2177 17likelihoodS/sqrt(B):15997,9 sSqrt(s)eventslumi=100 fb-1before likelihood36 %籽绵皂榆炳新馈花襄堵码绳童谴陈整赣赴眠亡姐诺剧规念滇录来酉臻膏裴Kaluza-Klein excitation of gluon胶子的卡鲁-克莱因激励Kaluza-Klein excitation
24、 of gluon胶子的卡鲁-克莱因激励23Conclusion Cross-section deviations Resonancesconsequences on others resonances (KK gravitons ?) statistics 1 106 files to be generated NLO computation ? full simulation ?LES HOUCHES PHYSICS AT TEV COLLIDERS 2003 BEYOND THE STANDARD MODEL WORKING GROUP: SUMMARY REPORT.By Beyond
25、 the Standard Model Working Group (B.C. Allanach et al.). SLAC-PUB-10365, Mar 2004. 114pp. Contributed to 3rd Les Houches Workshop: Physics at TeV Colliders, Les Houches, France, 26 May - 6 Jun 2003. e-Print Archive: hep-ph/0402295More information:怕凳眨捻匙阀陈桅轴仍涯蒲大尿沏凹相市醇拙嗅雍及大吼侣耶影羡讥妮耗Kaluza-Klein excitation of gluon胶子的卡鲁-克莱因激励Kaluza-Klein excitation of gluon胶子的卡鲁-克莱因激励24
