First observation of the decay $B^{+} \rightarrow \pi^{+} \mu^{+} \mu^{-}$

R. Aaij; S. Barsuk; O. Callot; J. He; B. Jean-Marie; J. Lefrançois; F. Machefert; A. Martin Sanchez; Marie Nicol; P. Robbe; M.-H. Schune; B. Viaud; I. Videau; E. Ben-Haim; M. Benayoun; P. David; L. Del Buono; A. Martens; Ziad Ajaltouni; E. Cogneras; O. Deschamps; I. El Rifai; Pierre Henrard; M. Hoballah; Marwa Jahjah-Hussein; R. Lefèvre; L. Li Gioi; S. Monteil; V. Niess; Pascal Perret; Diego Alejandro Roa Romero; Krzysztof Grzegorz Sobczak; C. Adrover; E. Aslanides; J. Cogan; R. Legac; O. Leroy; G. Mancinelli; E. Maurice; M. Perrin-Terrin; M. Sapunov; J. Serrano; A. Tsaregorodtsev; I. De Bonis; D. Decamp; Ph. Ghez; P. Hopchev; J.-P. Lees; I.V. Machikhiliyan; M.-N. Minard; B. Pietrzyk; S. T'Jampens; V. Tisserand; E. Tournefier

doi:10.1007/JHEP12(2012)125

First observation of the decay $B^{+} \rightarrow \pi^{+} \mu^{+} \mu^{-}$

R. Aaij S. Barsuk ¹ O. Callot ¹ J. He ¹ B. Jean-Marie ¹ J. Lefrançois ¹ F. Machefert ¹ A. Martin Sanchez ¹ Marie Nicol ¹ P. Robbe ¹ M.-H. Schune ¹ B. Viaud ¹ I. Videau ¹ E. Ben-Haim ² M. Benayoun ² P. David ² L. Del Buono ² A. Martens ² Ziad Ajaltouni ³ E. Cogneras ³ O. Deschamps ³ I. El Rifai ³ Pierre Henrard ³ M. Hoballah ³ Marwa Jahjah-Hussein ³ R. Lefèvre ³ L. Li Gioi ³ S. Monteil ³ V. Niess ³ Pascal Perret ³ Diego Alejandro Roa Romero ³ Krzysztof Grzegorz Sobczak ³ C. Adrover ⁴ E. Aslanides ⁴ J. Cogan ⁴ R. Legac ⁴ O. Leroy ⁴ G. Mancinelli ⁴ E. Maurice ⁴ M. Perrin-Terrin ⁴ M. Sapunov ⁴ J. Serrano ⁴ A. Tsaregorodtsev ⁴ I. De Bonis ⁵ D. Decamp ⁵ Ph. Ghez ⁵ P. Hopchev ⁵ J.-P. Lees ⁵ I.V. Machikhiliyan ⁵ M.-N. Minard ⁵ B. Pietrzyk ⁵ S. T'Jampens ⁵ V. Tisserand ⁵ E. Tournefier ⁵

1 LAL - Laboratoire de l'Accélérateur Linéaire

2 LPNHE - Laboratoire de Physique Nucléaire et de Hautes Énergies

3 LPC - Laboratoire de Physique Corpusculaire [Clermont-Ferrand]

4 CPPM - Centre de Physique des Particules de Marseille

5 LAPP - Laboratoire d'Annecy-le-Vieux de Physique des Particules

Abstract : A discovery of the rare decay $B^{+} \rightarrow \pi^{+} \mu^{+} \mu^{-}$ is presented. This decay is observed for the first time, with 5.2 $\sigma$ 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 $\pm$ 0.6 (stat.) $\pm$ 0.1 (syst.))$\times 10^{-8}$, and the ratio of the $B^{+} \rightarrow \pi^{+} \mu^{+} \mu^{-}$ and $B^{+} \rightarrow \K^{+} \mu^{+} \mu^{-}$ branching fractions is measured to be 0.053 $\pm$ 0.014 (stat.) $\pm$ 0.001 (syst.).

Document type :

Journal articles

Journal of High Energy Physics, Springer, 2012, 12, pp.125. <10.1007/JHEP12(2012)125>

Domain :

Physics [physics] / High Energy Physics - Experiment [hep-ex]

http://hal.in2p3.fr/in2p3-00741291
Contributor : Sabine Starita <>
Submitted on : Friday, October 12, 2012 - 11:46:34 AM
Last modification on : Wednesday, July 27, 2016 - 2:48:48 PM

First observation of the decay $B^{+} \rightarrow \pi^{+} \mu^{+} \mu^{-}$

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