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Paper   IPM / Particles And Accelerator / 12093
School of Particles and Accelerator
  Title:   Search for B(s) and B to dimuon decays in pp collisions at 7 TeV
1.  Hessamadin Arfaei
2.  Hamed Bakhshiansohi
3.  Seyed Mohsen Etesami
4.  Ali Fahim
5.  Majid Hashemi
6.  Hoda Hesari
7.  Abideh Jafari
8.  Mohsen Khakzad
9.  A Mohammadi
10.  Mojtaba Mohammadi Najafabadi
11.  Saeid Paktinat
12.  Batool Safarzadeh
13.  Maryam Zeinali
  Status:   Published
  Journal: Phys. Rev. Lett.
  No.:  191802
  Vol.:  107
  Year:  2011
  Supported by:  IPM
A search for the rare decays B0s-m+m- and B0 - m+m- is performed in pp collisions at sqrt(s) = 7 TeV, with a data sample corresponding to an integrated luminosity of 1.14 fb -1 , collected by the CMS experiment at the LHC. In both cases, the number of events observed after all selection requirements is consistent with expectations from background and standard-model signal predictions. The resulting upper limits on the branching fractions are B(B0s - m+m-) < 1.9* 10 power (-8)and B(B0 - m+m-) < 4.6 * 10 power(-9), at 95

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