Search for direct CP violation in D0→h-h modes using semileptonic B decays

R Aaij; C Abellan Beteta; B Adeva; M Adinol; C Adrover; A Affolder; Z Ajaltouni; J Albrecht; F Alessio; M Alexander; S Ali; G Alkhazov; P Alvarez Cartelle; AA Alves; S Amato; S Amerio; 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; TT 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; F Blanc; J Blouw; S Blusk; V Bocci; A Bondar; N Bondar; W Bonivento; S Borghi; A Borgia; TJV Bowcock; E Bowen; C Bozzi; T Brambach; J vandenBrand; J Bressieux; D Brett; M Britsch; T Britton; NH Brook; H Brown; I Burducea; A Bursche; G Busetto; J Buytaert; S Cadeddu; O Callot; M Calvi; M CalvoGomez; A Camboni; P Campana; D CamporaPerez; A Carbone; G Carboni; R Cardinale; A Cardini; H Carranza-Mejia; L Carson; K Carvalho Akiba; G Casse; M Cattaneo; C Cauet; M Charles; P Charpentier

Journal article

Search for direct CP violation in D0→h-h modes using semileptonic B decays

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

Physics Letters Section B Nuclear Elementary Particle and High Energy Physics | ELSEVIER | Published : 2013

DOI: 10.1016/j.physletb.2013.04.061

Open access

Abstract

A search for direct CP violation in D0 →h-h+ (where h = K or π) is presented using data corresponding to an integrated luminosity of 1.0fb-1 collected in 2011 by LHCb in pp collisions at a centre-of-mass energy of 7 TeV. The analysis uses D0 mesons produced in inclusive semileptonic b-hadron decays to the D0μX nal state, where the charge of the accompanying muon is used to tag the avour of the D0 meson. The difference in the CP-violating asymmetries between the two decay channels is measured to be ΔACP = ACP(K-K+) - ACP ( π-π+) = ( 0.49 ±0.30 (stat)± 0.14 (syst))%. This result does not conrm the evidence for direct CP violationinthecharmsectorreportedinother analyses. © 2013 CERN.

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 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. 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.