Measurements of the branching fractions for B(s)→D (s)πππ and Λb0→Λc πππ

R Aaij; B Adeva; M Adinolfi; C Adrover; A Affolder; Z Ajaltouni; J Albrecht; F Alessio; M Alexander; G Alkhazov; P Alvarez Cartelle; AA Alves; S Amato; Y Amhis; J Anderson; RB Appleby; O Aquines Gutierrez; F Archilli; L Arrabito; A Artamonov; M Artuso; E Aslanides; G Auriemma; S Bachmann; JJ Back; DS Bailey; V Balagura; W Baldini; RJ Barlow; C Barschel; S Barsuk; W Barter; A Bates; C Bauer; T Bauer; A Bay; I Bediaga; K Belous; I Belyaev; E Ben-Haim; M Benayoun; G Bencivenni; S Benson; J Benton; R Bernet; MO Bettler; M Van Beuzekom; A Bien; S Bifani; A Bizzeti; PM Bjørnstad; T Blake; F Blanc; C Blanks; J Blouw; S Blusk; A Bobrov; V Bocci; A Bondar; N Bondar; W Bonivento; S Borghi; A Borgia; TJV Bowcock; C Bozzi; T Brambach; J Van Den Brand; J Bressieux; D Brett; S Brisbane; M Britsch; T Britton; NH Brook; H Brown; A Büchler-Germann; I Burducea; A Bursche; J Buytaert; S Cadeddu; JM Caicedo Carvajal; O Callot; M Calvi; M Calvo Gomez; A Camboni; P Campana; A Carbone; G Carboni; R Cardinale; A Cardini; L Carson; K Carvalho Akiba; G Casse; M Cattaneo; M Charles; P Charpentier; N Chiapolini; K Ciba; X Cid Vidal; G Ciezarek; PEL Clarke

Journal article

Measurements of the branching fractions for B(s)→D (s)πππ and Λb0→Λc πππ

R Aaij, B Adeva, M Adinolfi, C Adrover, A Affolder, Z Ajaltouni, J Albrecht, F Alessio, M Alexander, G Alkhazov, P Alvarez Cartelle, AA Alves, S Amato, Y Amhis, J Anderson, RB Appleby, O Aquines Gutierrez, F Archilli, L Arrabito, A Artamonov Show all

Physical Review D Particles Fields Gravitation and Cosmology | AMER PHYSICAL SOC | Published : 2011

DOI: 10.1103/PhysRevD.84.092001

Open access

Abstract

Branching fractions of the decays HbHcπ -π+π- relative to Hb→ Hcπ- are presented, where Hb (Hc) represents B̄0 (D+), B- (D0), B̄s0 (Ds+), and Λb0 (Λc+). The measurements are performed with the LHCb detector using 35pb-1 of data collected at √s=7TeV. The ratios of branching fractions are measured to be [B(B̄0→D +π-π+π-)]/[B(B ̄0→D+π-)]=2.38±0. 11±0.21, [B(B-→D0π -π+π-)]/[B(B -→D0π-)]=1.27±0.06±0.11, [B(B̄s0→Ds+π-π+π-)]/ [B(B̄s0→Ds+π-)]=2.01±0.37±0.20, [B(Λb0→Λc+π-π+π-)]/ [B(Λb0→Λc+π-)]=1.43±0.16±0.13 We also report measurements of partial decay rates of these decays to excited charm hadrons. These results are of comparable or higher precision than existing measurements. © 2011 CERN. Published..

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University of Melbourne Researchers

Prof Phillip Urquijo Author

Grants

Awarded by Science and Technology Facilities Council

Funding Acknowledgements

We express our gratitude to our colleagues in the CERN accelerator departments for the excellent performance of the LHC. We thank the technical and administrative staff at CERN and at the LHCb institutes, and acknowledge support from the following national agencies: CAPES, CNPq, FAPERJ, and FINEP (Brazil); CERN; NSFC (China); CNRS/IN2P3 (France); BMBF, DFG, HGF, and MPG (Germany); SFI (Ireland); INFN (Italy); FOM and NWO (Netherlands); SCSR (Poland); ANCS (Romania); MinES of Russia and Rosatom (Russia); MICINN, XuntaGal, and GENCAT (Spain); SNSF and SER (Switzerland); NAS Ukraine (Ukraine); STFC (United Kingdom); NSF (USA). We also acknowledge the support received from the ERC under FP7 and the Region Auvergne.