First Observation of the Decay B+c→J/ψπ+π−π+

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Title:	First Observation of the Decay B+c→J/ψπ+π−π+
Author:	Calvo Gómez, Míriam; Camboni, Alessandro; Vilasís Cardona, Xavier; LHCb Collaboration - CERN
Other authors:	Universitat Ramon Llull. La Salle; CERN
Abstract:	The decay B+c→J/ψπ+π−π+ is observed for the first time, using 0.8 fb−1 of pp collisions at √s=7 TeV collected by the LHCb experiment. The ratio of branching fractions B(B+c→J/ψπ+π−π+)/B(B+c→J/ψπ+) is measured to be 2.41±0.30±0.33, where the first uncertainty is statistical and the second is systematic. The result is in agreement with theoretical predictions.
Publication date:	2012-06-19
Subject (UDC):	53 - Física
Subject(s):	Gran col·lisionador d'hadrons (França i Suïssa) Partícules (Física nuclear)
Rights:	L'accés als continguts d'aquest document queda condicionat a l'acceptació de les condicions d'ús establertes per la següent llicència Creative Commons:http://creativecommons.org/licenses/by/4.0/ © CERN
Pages:	7 p.
Document type:	Article Article - Published version
DOI:	https://doi.org/10.1103/PhysRevLett.108.251802
Published by:	American Physical Society
Publish at:	Physical Review Letters, 2012, Vol. 108, No. 25 (Juny)
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