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Paper   IPM / Particles / 11712
School of Particles and Accelerator
  Title:   Measurement of the B + Production Cross Section in pp Collisions at p sqrt(s) = 7 TeV
1.  Hessamaddin 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. Rev. Lett.
  No.:  112001
  Vol.:  106
  Year:  2011
  Supported by:  IPM
Measurements of the total and differential cross sections ds/dp B T and ds/dy B for B+ mesons produced in pp ollisions at p sqrt(s) = 7 TeV are presented. The data correspond to an integrated luminosity of 5.8 pb 1 collected by the CMS experiment operating at the LHC. The exclusive decay B + ! J/yK+ , with J/y ! m+m , is used to detect B+ mesons and to measure the production cross section as a function of p B T and y B . The total cross section for pB T > 5GeV and yB < 2.4 is measured to be 28.1  2.4  2.0 3.1 mb, where the first uncertainty is statistical, the second is systematic, and the last is from the luminosity measurement.

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