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http://www.slideshare.net/worldTC Last of the Particles? Search   for Higgs at LHC
Prof. Higgs and his boson ,[object Object],[object Object],[object Object],[object Object],Ref: Wikipedia Higgs boson is also  referred as Higgs-Anderson boson (e.g. see Wikipedia)
Mankind’s ancient question न   तत   सूयो   भाति   न   चनदतारकं   नेमा   विदयूतॉ   भानि   कूतोयः   यमगनिः   तवमेब   भानताम्   अनूभाति   सव॔   तसय   भासा   सव॔मिदम   विभाति In the beginning there was no sun,  neither did the moon shine, nor the stars,  man made light was no where. It is Your light that lit up everything else, Every thing in this world shines from Your light Where did everything come from? What is everything made up of?
Physicists’ latest answer The Standard Model of Particle Physics
Names of the actors: Matter ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Names of the actors: Forces ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Feynman Diagrams This is more than just a picture !
Without Higgs… ,[object Object],[object Object],[object Object],According to standard model
How to discover new particles? ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],Measure E,p, Get the mass of the original particle E1E2(1-cos(theta12)) Beware of fake products!
Example
Plan for finding Higgs ,[object Object],[object Object],[object Object],[object Object],OK! So we just have to catch these particles and measure E,p
The LHC Z
LHC in  ACTION
Proton Proton is a rather complex bag of quarks and gluons
Proton  Proton  7 TeV 7 TeV
parton  parton Z 500 GeV 100 GeV Two partons, usually with different momenta collide and often anihilate giving rise to other particlesin the final state  Beam axis Note: parton = quark, antiquark or gluon
Of quark bondage: Jets ,[object Object],[object Object],[object Object],[object Object],Two charm quarks moving apart from each other
Luminosity and cross section ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Higgs production at LHC
Higgs Decays  search channels
* numbers are for barrel Silicon Tracker PbWO 4  ECAL solenoid 4Tesla field data taking starts 2007 ? Startup Luminosity 2X10 33  cm -2 /s that is: 10 fb -1  per year sampling brass HCAL MUON Chambers
The Tracker
The ECAL
 
The HCAL
The Muon Chamber
 
CMS in  ACTION
Transverse slice through CMS detector Click on a particle type to visualise that particle in CMS Press “escape” to exit
h      Two clean electromagnetic clusters (For unconverted photons) Backgrounds: gg,qq   ,qg  q  @low luminosity jet-jet 10 5  events/s jet+photon 10 2  events/s 2 photon 1 event/12.5s Higgs 1 event/25s h  2photon 1 event/10,000s CMS Detector: schematic X-sectional view HCAL ECAL TRACKER two photon background gamma+jet background
h     mass peak   =646MeV events/50MeV m  for  130 GeV Higgs CMS full detector simulation. Ref: CMS Note 2003/033
H    ZZ    4  Clean, resolution better than 1GeV Discovery Luminosity:
Significance (or what we hope…)
You can do it too…
Impossible is possible!

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Search For Higgs At Lhc

  • 1. http://www.slideshare.net/worldTC Last of the Particles? Search for Higgs at LHC
  • 2.
  • 3. Mankind’s ancient question न तत सूयो भाति न चनदतारकं नेमा विदयूतॉ भानि कूतोयः यमगनिः तवमेब भानताम् अनूभाति सव॔ तसय भासा सव॔मिदम विभाति In the beginning there was no sun, neither did the moon shine, nor the stars, man made light was no where. It is Your light that lit up everything else, Every thing in this world shines from Your light Where did everything come from? What is everything made up of?
  • 4. Physicists’ latest answer The Standard Model of Particle Physics
  • 5.
  • 6.
  • 7. Feynman Diagrams This is more than just a picture !
  • 8.
  • 9.
  • 11.
  • 13. LHC in ACTION
  • 14. Proton Proton is a rather complex bag of quarks and gluons
  • 15. Proton  Proton 7 TeV 7 TeV
  • 16. parton  parton Z 500 GeV 100 GeV Two partons, usually with different momenta collide and often anihilate giving rise to other particlesin the final state Beam axis Note: parton = quark, antiquark or gluon
  • 17.
  • 18.
  • 20. Higgs Decays search channels
  • 21. * numbers are for barrel Silicon Tracker PbWO 4 ECAL solenoid 4Tesla field data taking starts 2007 ? Startup Luminosity 2X10 33 cm -2 /s that is: 10 fb -1 per year sampling brass HCAL MUON Chambers
  • 24.  
  • 27.  
  • 28. CMS in ACTION
  • 29. Transverse slice through CMS detector Click on a particle type to visualise that particle in CMS Press “escape” to exit
  • 30. h   Two clean electromagnetic clusters (For unconverted photons) Backgrounds: gg,qq   ,qg  q  @low luminosity jet-jet 10 5 events/s jet+photon 10 2 events/s 2 photon 1 event/12.5s Higgs 1 event/25s h  2photon 1 event/10,000s CMS Detector: schematic X-sectional view HCAL ECAL TRACKER two photon background gamma+jet background
  • 31. h   mass peak   =646MeV events/50MeV m  for 130 GeV Higgs CMS full detector simulation. Ref: CMS Note 2003/033
  • 32. H  ZZ  4  Clean, resolution better than 1GeV Discovery Luminosity:
  • 33. Significance (or what we hope…)
  • 34. You can do it too…