Measurement of the fragmentation fraction ratio fs/fdand its dependence on B meson kinematics

R Aaij; C Abellan Beteta; A Adametz; B Adeva; M Adinolfi; C Adrover; A Affolder; Z Ajaltouni; J Albrecht; F Alessio; M Alexander; S Ali; G Alkhazov; P Alvarez Cartelle; AA Alves; S Amato; Y Amhis; L Anderlini; J Anderson; R Andreassen; RB Appleby; O Aquines Gutierrez; F Archilli; A Artamonov; M Artuso; E Aslanides; G Auriemma; S Bachmann; JJ Back; C Baesso; V Balagura; W Baldini; RJ Barlow; C Barschel; S Barsuk; W Barter; A Bates; T Bauer; A Bay; J Beddow; I Bediaga; S Belogurov; K Belous; I Belyaev; E Ben-Haim; M Benayoun; G Bencivenni; S Benson; J Benton; A Berezhnoy; R Bernet; MO Bettler; M van Beuzekom; A Bien; S Bifani; T Bird; 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; E Bowen; C Bozzi; T Brambach; J van den Brand; J Bressieux; D Brett; M Britsch; T Britton; NH Brook; H Brown; A Büchler-Germann; I Burducea; A Bursche; J Buytaert; S Cadeddu; O Callot; M Calvi; M Calvo Gomez; A Camboni; P Campana; A Carbone; G Carboni; R Cardinale; A Cardini; H Carranza-Mejia; L Carson; K Carvalho Akiba; G Casse

Journal article

Measurement of the fragmentation fraction ratio fs/fdand its dependence on B meson kinematics

R Aaij, C Abellan Beteta, A Adametz, B Adeva, M Adinolfi, C Adrover, A Affolder, Z Ajaltouni, J Albrecht, F Alessio, M Alexander, S Ali, G Alkhazov, P Alvarez Cartelle, AA Alves, S Amato, Y Amhis, L Anderlini, J Anderson, R Andreassen Show all

Journal of High Energy Physics | SPRINGER | Published : 2013

DOI: 10.1007/JHEP04(2013)001

Abstract

The relative production rate of B0 sand B0mesons is determined with the hadronic decays B0 s→ D− sπ+and B0→ D−K+. The measurement uses data corresponding to 1.0 fb−1of pp collisions at a centre-of-mass energy of √s = 7TeV recorded in the forward region with the LHCb experiment. The ratio of production rates, fs/fd, is measured to be 0.238 ± 0.004 ± 0.015 ± 0.021, where the first uncertainty is statistical, the second systematic, and the third theoretical. This is combined with a previous LHCb measurement to obtain fs/fd= 0.256 ±0.020. The dependence of fs/fdon the transverse momentum and pseudorapidity of the B meson is determined using the decays B0 s→ D− sπ+and B0→ D−π+. There is evidence ..

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University of Melbourne Researchers

Anna Phan Author

Grants

Awarded by Stichting voor Fundamenteel Onderzoek der Materie

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 the LHCb institutes. We acknowledge support from CERN and from the national agencies: CAPES, CNPq, FAPERJ and FINEP (Brazil); NSFC (China); CNRS/IN2P3 and Region Auvergne (France); BMBF, DFG, HGF and MPG (Germany); SFI (Ireland); INFN (Italy); FOM and NWO (The Netherlands); SCSR (Poland); ANCS/IFA (Romania); MinES, Rosatom, RFBR and NRC "Kurchatov Institute" (Russia); MinECo, XuntaGal and GEN-CAT (Spain); SNSF and SER (Switzerland); NAS Ukraine (Ukraine); STFC (United Kingdom); NSF (USA). We also acknowledge the support received from the ERC under FP7. The Tier1 computing centres are supported by IN2P3 (France), KIT and BMBF (Germany), INFN (Italy), NWO and SURF (The Netherlands), PIC (Spain), GridPP (United Kingdom). We are thankful for the computing resources put at our disposal by Yandex LLC (Russia), as well as to the communities behind the multiple open source software packages that we depend on.