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Properties of L=1 B(1) and B(2)* mesons |
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| Authors: | Abazov V M Abbott B Abolins M Acharya B S Adams M Adams T Aguilo E Ahn S H Ahsan M Alexeev G D Alkhazov G Alton A Alverson G Alves G A Anastasoaie M Ancu L S Andeen T Anderson S Andrieu B Anzelc M S Arnoud Y Arov M Arthaud M Askew A Asman B Assis Jesus A C S Atramentov O Autermann C Avila C Ay C Badaud F Baden A Bagby L Baldin B Bandurin D V Banerjee S Banerjee P Barberis E Barfuss A-F Bargassa P Baringer P Barreto J Bartlett J F Bassler U Bauer D Beale S Bean A Begalli M Begel M Belanger-Champagne C Bellantoni L Bellavance A Benitez J A Beri S B Bernardi G Bernhard R Berntzon L Bertram I |
| Institution: | Joint Institute for Nuclear Research, Dubna, Russia. |
| Abstract: | 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 DeltaM 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. |
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