Properties of l=1 B-1 and B(2) Mesons

This Letter presents the first strong evidence for the resolution of the excited B mesons B-1 and B-2(*) as two separate states in fully reconstructed decays to B+(*())pi(-). The mass of B-1 is measured to be 5720.6 +/- 2.4 +/- 1.4 MeV/c(2) and the mass difference Delta M between B-2* and B-1 is 26....

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Veröffentlicht in:	Physical review letters 2007, Vol.99 (17), p.172001
Hauptverfasser:	Abazov, V. M., Åsman, Barbro, Bélanger-Champagne, Camille, Clément, Christophe, Gollub, Nils, Hansson, Per, Strandberg, Jonas, Strandberg, Sara, Zverev, E. G., et al
Format:	Artikel
Sprache:	eng
Schlagworte:	B-MESONS DECAYS DETECTOR Elementarpartikelfysik Elementary particle physics EXCITED HEAVY MESONS Fysik LIGHT MESONS NATURAL SCIENCES NATURVETENSKAP PHYSICS SYSTEM
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Beschreibung
Zusammenfassung:	This Letter presents the first strong evidence for the resolution of the excited B mesons B-1 and B-2() as two separate states in fully reconstructed decays to B+(())pi(-). The mass of B-1 is measured to be 5720.6 +/- 2.4 +/- 1.4 MeV/c(2) and the mass difference Delta M between B-2* and B-1 is 26.2 +/- 3.1 +/- 0: 9 MeV/c(2), giving the mass of the B-2* as 5746.8 +/- 2.4 +/- 1.7 MeV/c(2). The production rate for B-1 and B-2* mesons is determined to be a fraction (13.9 +/- 1.9 +/- 3.2)% of the production rate of the B+ meson.
ISSN:	0031-9007 1079-7114
DOI:	10.1103/PhysRevLett.99.172001