First observation of the decay B+ → π+ μ+ μ-

A discovery of the rare decay B+ → π+ μ+ μ- is presented. This decay is observed for the first time, with 5.2 σ significance. The observation is made using pp collision data, corresponding to an integrated luminosity of 1.0 fb -1, collected with the LHCb detector. The measured branching fraction is (2.3 ± 0.6 (stat.) ± 0.1 (syst.))×10-8, and the ratio of the B+ → π+ μ+ μ- and B+ → K+ μ+ μ- branching fractions is measured to be 0.053 ± 0.014 (stat.) ± 0.001 (syst.).

Title:

	First observation of the decay B+ → π+ μ+ μ-
Authors:	Aaij, Roel Beteta, C. Abellán Adametz, Aleksandra , ...
Keywords:	Hadron Decay Energy LHCb detector Physics
Issue Date:	2012
Publisher:	H. : ĐHQGHN
Abstract:	A discovery of the rare decay B+ → π+ μ+ μ- is presented. This decay is observed for the first time, with 5.2 σ significance. The observation is made using pp collision data, corresponding to an integrated luminosity of 1.0 fb -1, collected with the LHCb detector. The measured branching fraction is (2.3 ± 0.6 (stat.) ± 0.1 (syst.))×10-8, and the ratio of the B+ → π+ μ+ μ- and B+ → K+ μ+ μ- branching fractions is measured to be 0.053 ± 0.014 (stat.) ± 0.001 (syst.).
Description:	Journal of High Energy Physics 2012(12),125
URI:	http://repository.vnu.edu.vn/handle/VNU_123/27469
Appears in Collections:	Bài báo của ĐHQGHN trong Scopus