“School of Particles And Accelerator”

Back to Papers Home
Back to Papers of School of Particles And Accelerator

Paper   IPM / Particles And Accelerator / 12062
School of Particles and Accelerator
  Title:   A search for excited leptons in pp collisions at sqrt(s) = 7 TeV
1.  Hessamadin Arfaei
2.  Hamed Bakhshiansohi
3.  Seyed Mohsen Etesami
4.  Ali Fahim
5.  Majid Hashemi
6.  Abideh Jafari
7.  Mohsen Khakzad
8.  A Mohammadi
9.  Mojtaba Mohammadi Najafabadi
10.  Saeid Paktinat Mehdiabadi
11.  Batool Safarzadeh
12.  Maryam Zeinali
  Status:   Published
  Journal: Phys. Lett. B
  Vol.:  704
  Year:  2011
  Pages:   143-162
  Supported by:  IPM
A search for excited leptons is carried out with the CMS detector at the LHC, using 36 pb-1 of pp collision data recorded at sqrt(s) = 7 TeV. The search is performed for associated production of a lepton and an oppositely charged excited lepton pp ! ll followed by the decay l ! lg, resulting in the llg final state, where l = e, m. No excess of events above the standard model expectation is observed. Interpreting the findings in the context of lproduction through four-fermion contact interactions and subsequent decay via electroweak processes, first upper limits are reported for l*production at this collision energy. The exclusion region in the compositeness scale L and excited lepton mass Mlparameter space is extended beyond previously established limits. For L = Ml , excited lepton masses are excluded below 1070 GeV/c 2 for e and 1090 GeV/c 2 for m* at the 95

Download TeX format
back to top
scroll left or right