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; M. Nicol; P. Robbe; M.-H. Schune; B. Viaud; I. Videau; E. Ben-Haim; M. Benayoun; P. David; L. Del Buono; A. Martens; Z. Ajaltouni; E. Cogneras; O. Deschamps; I. El Rifai; P. Henrard; M. Hoballah; M. Jahjah Hussein; R. Lefèvre; L. Li Gioi; S. Monteil; V. Niess; P. Perret; D. Roa Romero; K. 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

HAL: in2p3-00741291, version 1

arXiv: 1210.2645

DOI: 10.1007/JHEP12(2012)125

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Journal of High Energy Physics 12 (2012) 125

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

R. Aaij, S. Barsuk¹, O. Callot¹, J. He¹, B. Jean-Marie¹, J. Lefrançois¹, F. Machefert¹, A. Martin Sanchez¹, M. Nicol¹, P. Robbe¹, M.-H. Schune¹, B. Viaud¹, I. Videau¹, E. Ben-Haim², M. Benayoun², P. David², L. Del Buono², A. Martens², Z. Ajaltouni³, E. Cogneras³, O. Deschamps³, I. El Rifai³, P. Henrard³, M. Hoballah³, M. Jahjah Hussein³, R. Lefèvre³, L. Li Gioi³, S. Monteil³, V. Niess³, P. Perret³, D. Roa Romero³, K. Sobczak³, C. Adrover⁴, E. Aslanides⁴, J. Cogan⁴, R. Legac⁴, O. Leroy⁴, G. Mancinelli⁴, E. Maurice⁴, M. Perrin-Terrin⁴, M. Sapunov⁴, J. Serrano⁴, A. Tsaregorodtsev⁴, I. De Bonis⁵, D. Decamp⁵, Ph. Ghez⁵, P. Hopchev⁵, J.-P. Lees⁵, I.V. Machikhiliyan⁵, M.-N. Minard⁵, B. Pietrzyk⁵, S. T'Jampens⁵, V. Tisserand⁵, E. Tournefier⁵

For the LHCb collaboration(s)

(2012)

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.).

1:	LAL - Laboratoire de l'Accélérateur Linéaire

2:	LPNHE - Laboratoire de Physique Nucléaire et de Hautes Énergies

3:	LPC-CLERMONT - Laboratoire de Physique Corpusculaire de Clermont-Ferrand

4:	CPPM - Centre de Physique des Particules de Marseille

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

Subject(s)

Physics/High Energy Physics - Experiment

Fulltext link:

http://fr.arXiv.org/abs/1210.2645


in2p3-00741291, version 1
http://hal.in2p3.fr/in2p3-00741291
oai:hal.in2p3.fr:in2p3-00741291
From: Françoise Marechal <>
Submitted on: Friday, 12 October 2012 11:46:34
Updated on: Monday, 7 January 2013 14:56:10