Measurement of the fragmentation fraction ratio f s /f d and its dependence on B meson kinematics

Author:

,Aaij R.,Abellan Beteta C.,Adametz A.,Adeva B.,Adinolfi M.,Adrover C.,Affolder A.,Ajaltouni Z.,Albrecht J.,Alessio F.,Alexander M.,Ali S.,Alkhazov G.,Alvarez Cartelle P.,Alves A. A.,Amato S.,Amhis Y.,Anderlini L.,Anderson J.,Andreassen R.,Appleby R. B.,Aquines Gutierrez O.,Archilli F.,Artamonov A.,Artuso M.,Aslanides E.,Auriemma G.,Bachmann S.,Back J. J.,Baesso C.,Balagura V.,Baldini W.,Barlow R. J.,Barschel C.,Barsuk S.,Barter W.,Bates A.,Bauer Th.,Bay A.,Beddow J.,Bediaga I.,Belogurov S.,Belous K.,Belyaev I.,Ben-Haim E.,Benayoun M.,Bencivenni G.,Benson S.,Benton J.,Berezhnoy A.,Bernet R.,Bettler M.-O.,van Beuzekom M.,Bien A.,Bifani S.,Bird T.,Bizzeti A.,Bjørnstad P. M.,Blake T.,Blanc F.,Blanks C.,Blouw J.,Blusk S.,Bobrov A.,Bocci V.,Bondar A.,Bondar N.,Bonivento W.,Borghi S.,Borgia A.,Bowcock T. J. V.,Bowen E.,Bozzi C.,Brambach T.,van den Brand J.,Bressieux J.,Brett D.,Britsch M.,Britton T.,Brook N. H.,Brown H.,Büchler-Germann A.,Burducea I.,Bursche A.,Buytaert J.,Cadeddu S.,Callot O.,Calvi M.,Calvo Gomez M.,Camboni A.,Campana P.,Carbone A.,Carboni G.,Cardinale R.,Cardini A.,Carranza-Mejia H.,Carson L.,Carvalho Akiba K.,Casse G.,Cattaneo M.,Cauet Ch.,Charles M.,Charpentier Ph.,Chen P.,Chiapolini N.,Chrzaszcz M.,Ciba K.,Cid Vidal X.,Ciezarek G.,Clarke P. E. L.,Clemencic M.,Cliff H. V.,Closier J.,Coca C.,Coco V.,Cogan J.,Cogneras E.,Collins P.,Comerma-Montells A.,Contu A.,Cook A.,Coombes M.,Corti G.,Couturier B.,Cowan G. A.,Craik D.,Cunliffe S.,Currie R.,D’Ambrosio C.,David P.,David P. N. Y.,De Bonis I.,De Bruyn K.,De Capua S.,De Cian M.,De Miranda J. M.,De Paula L.,De Silva W.,De Simone P.,Decamp D.,Deckenhoff M.,Degaudenzi H.,Del Buono L.,Deplano C.,Derkach D.,Deschamps O.,Dettori F.,Di Canto A.,Dickens J.,Dijkstra H.,Diniz Batista P.,Dogaru M.,Domingo Bonal F.,Donleavy S.,Dordei F.,Dosil Suárez A.,Dossett D.,Dovbnya A.,Dupertuis F.,Dzhelyadin R.,Dziurda A.,Dzyuba A.,Easo S.,Egede U.,Egorychev V.,Eidelman S.,van Eijk D.,Eisenhardt S.,Eitschberger U.,Ekelhof R.,Eklund L.,El Rifai I.,Elsasser Ch.,Elsby D.,Falabella A.,Färber C.,Fardell G.,Farinelli C.,Farry S.,Fave V.,Ferguson D.,Fernandez Albor V.,Ferreira Rodrigues F.,Ferro-Luzzi M.,Filippov S.,Fitzpatrick C.,Fontana M.,Fontanelli F.,Forty R.,Francisco O.,Frank M.,Frei C.,Frosini M.,Furcas S.,Furfaro E.,Gallas Torreira A.,Galli D.,Gandelman M.,Gandini P.,Gao Y.,Garofoli J.,Garosi P.,Garra Tico J.,Garrido L.,Gaspar C.,Gauld R.,Gersabeck E.,Gersabeck M.,Gershon T.,Ghez Ph.,Gibson V.,Gligorov V. V.,Göbel C.,Golubkov D.,Golutvin A.,Gomes A.,Gordon H.,Grabalosa Gándara M.,Graciani Diaz R.,Granado Cardoso L. A.,Graugés E.,Graziani G.,Grecu A.,Greening E.,Gregson S.,Grünberg O.,Gui B.,Gushchin E.,Guz Yu.,Gys T.,Hadjivasiliou C.,Haefeli G.,Haen C.,Haines S. C.,Hall S.,Hampson T.,Hansmann-Menzemer S.,Harnew N.,Harnew S. T.,Harrison J.,Harrison P. F.,Hartmann T.,He J.,Heijne V.,Hennessy K.,Henrard P.,Hernando Morata J. A.,van Herwijnen E.,Hicks E.,Hill D.,Hoballah M.,Hombach C.,Hopchev P.,Hulsbergen W.,Hunt P.,Huse T.,Hussain N.,Hutchcroft D.,Hynds D.,Iakovenko V.,Ilten P.,Imong J.,Jacobsson R.,Jaeger A.,Jans E.,Jansen F.,Jaton P.,Jing F.,John M.,Johnson D.,Jones C. R.,Jost B.,Kaballo M.,Kandybei S.,Karacson M.,Karbach T. M.,Kenyon I. R.,Kerzel U.,Ketel T.,Keune A.,Khanji B.,Kochebina O.,Komarov I.,Koopman R. F.,Koppenburg P.,Korolev M.,Kozlinskiy A.,Kravchuk L.,Kreplin K.,Kreps M.,Krocker G.,Krokovny P.,Kruse F.,Kucharczyk M.,Kudryavtsev V.,Kvaratskheliya T.,La Thi V. N.,Lacarrere D.,Lafferty G.,Lai A.,Lambert D.,Lambert R. W.,Lanciotti E.,Lanfranchi G.,Langenbruch C.,Latham T.,Lazzeroni C.,Le Gac R.,van Leerdam J.,Lees J.-P.,Lefèvre R.,Leflat A.,Lefrançois J.,Leroy O.,Li Y.,Gioi L. Li,Liles M.,Lindner R.,Linn C.,Liu B.,Liu G.,von Loeben J.,Lopes J. H.,Lopez Asamar E.,Lopez-March N.,Lu H.,Luisier J.,Luo H.,Mac Raighne A.,Machefert F.,Machikhiliyan I. V.,Maciuc F.,Maev O.,Malde S.,Manca G.,Mancinelli G.,Mangiafave N.,Marconi U.,Märki R.,Marks J.,Martellotti G.,Martens A.,Martin L.,Martín Sánchez A.,Martinelli M.,Martinez Santos D.,Martins Tostes D.,Massafferri A.,Matev R.,Mathe Z.,Matteuzzi C.,Matveev M.,Maurice E.,Mazurov A.,McCarthy J.,McNulty R.,Meadows B.,Meier F.,Meissner M.,Merk M.,Milanes D. A.,Minard M.-N.,Molina Rodriguez J.,Monteil S.,Moran D.,Morawski P.,Mountain R.,Mous I.,Muheim F.,Müller K.,Muresan R.,Muryn B.,Muster B.,Naik P.,Nakada T.,Nandakumar R.,Nasteva I.,Needham M.,Neufeld N.,Nguyen A. D.,Nguyen T. D.,Nguyen-Mau C.,Nicol M.,Niess V.,Niet R.,Nikitin N.,Nikodem T.,Nisar S.,Nomerotski A.,Novoselov A.,Oblakowska-Mucha A.,Obraztsov V.,Oggero S.,Ogilvy S.,Okhrimenko O.,Oldeman R.,Orlandea M.,Otalora Goicochea J. M.,Owen P.,Pal B. K.,Palano A.,Palutan M.,Panman J.,Papanestis A.,Pappagallo M.,Parkes C.,Parkinson C. J.,Passaleva G.,Patel G. D.,Patel M.,Patrick G. N.,Patrignani C.,Pavel-Nicorescu C.,Pazos Alvarez A.,Pellegrino A.,Penso G.,Pepe Altarelli M.,Perazzini S.,Perego D. L.,Perez Trigo E.,Pérez-Calero Yzquierdo A.,Perret P.,Perrin-Terrin M.,Pessina G.,Petridis K.,Petrolini A.,Phan A.,Picatoste Olloqui E.,Pietrzyk B.,Pilař T.,Pinci D.,Playfer S.,Plo Casasus M.,Polci F.,Polok G.,Poluektov A.,Polycarpo E.,Popov D.,Popovici B.,Potterat C.,Powell A.,Prisciandaro J.,Pugatch V.,Puig Navarro A.,Qian W.,Rademacker J. H.,Rakotomiaramanana B.,Rangel M. S.,Raniuk I.,Rauschmayr N.,Raven G.,Redford S.,Reid M. M.,dos Reis A. C.,Ricciardi S.,Richards A.,Rinnert K.,Rives Molina V.,Roa Romero D. A.,Robbe P.,Rodrigues E.,Rodriguez Perez P.,Rogers G. J.,Roiser S.,Romanovsky V.,Romero Vidal A.,Rouvinet J.,Ruf T.,Ruiz H.,Sabatino G.,Saborido Silva J. J.,Sagidova N.,Sail P.,Saitta B.,Salzmann C.,Sanmartin Sedes B.,Sannino M.,Santacesaria R.,Santamarina Rios C.,Santovetti E.,Sapunov M.,Sarti A.,Satriano C.,Satta A.,Savrie M.,Savrina D.,Schaack P.,Schiller M.,Schindler H.,Schleich S.,Schlupp M.,Schmelling M.,Schmidt B.,Schneider O.,Schopper A.,Schune M.-H.,Schwemmer R.,Sciascia B.,Sciubba A.,Seco M.,Semennikov A.,Senderowska K.,Sepp I.,Serra N.,Serrano J.,Seyfert P.,Shapkin M.,Shapoval I.,Shatalov P.,Shcheglov Y.,Shears T.,Shekhtman L.,Shevchenko O.,Shevchenko V.,Shires A.,Silva Coutinho R.,Skwarnicki T.,Smith N. A.,Smith E.,Smith M.,Sobczak K.,Sokoloff M. D.,Soler F. J. P.,Soomro F.,Souza D.,Souza De Paula B.,Spaan B.,Sparkes A.,Spradlin P.,Stagni F.,Stahl S.,Steinkamp O.,Stoica S.,Stone S.,Storaci B.,Straticiuc M.,Straumann U.,Subbiah V. K.,Swientek S.,Syropoulos V.,Szczekowski M.,Szczypka P.,Szumlak T.,T’Jampens S.,Teklishyn M.,Teodorescu E.,Teubert F.,Thomas C.,Thomas E.,van Tilburg J.,Tisserand V.,Tobin M.,Tolk S.,Tonelli D.,Topp-Joergensen S.,Torr N.,Tournefier E.,Tourneur S.,Tran M. T.,Tresch M.,Tsaregorodtsev A.,Tsopelas P.,Tuning N.,Ubeda Garcia M.,Ukleja A.,Urner D.,Uwer U.,Vagnoni V.,Valenti G.,Vazquez Gomez R.,Vazquez Regueiro P.,Vecchi S.,Velthuis J. J.,Veltri M.,Veneziano G.,Vesterinen M.,Viaud B.,Vieira D.,Vilasis-Cardona X.,Vollhardt A.,Volyanskyy D.,Voong D.,Vorobyev A.,Vorobyev V.,Voß C.,Voss H.,Waldi R.,Wallace R.,Wandernoth S.,Wang J.,Ward D. R.,Watson N. K.,Webber A. D.,Websdale D.,Whitehead M.,Wicht J.,Wiedner D.,Wiggers L.,Wilkinson G.,Williams M. P.,Williams M.,Wilson F. F.,Wishahi J.,Witek M.,Witzeling W.,Wotton S. A.,Wright S.,Wu S.,Wyllie K.,Xie Y.,Xing F.,Xing Z.,Yang Z.,Young R.,Yuan X.,Yushchenko O.,Zangoli M.,Zavertyaev M.,Zhang F.,Zhang L.,Zhang W. C.,Zhang Y.,Zhelezov A.,Zhokhov A.,Zhong L.,Zvyagin A.

Abstract

Abstract The relative production rate of $ B_s^0 $ and B 0 mesons is determined with the hadronic decays $ B_s^0\to D_s^{-}{\pi^{+}} $ and B 0D K +. The measurement uses data corresponding to 1.0 fb−1 of pp collisions at a centre-of-mass energy of $ \sqrt{s}=7 $ TeV recorded in the forward region with the LHCb experiment. The ratio of production rates, f s /f d , 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 f s /f d  = 0.256 ± 0.020. The dependence of f s /f d on the transverse momentum and pseudorapidity of the B meson is determined using the decays $ B_s^0\to D_s^{-}{\pi^{+}} $ and B 0D π+. There is evidence for a decrease with increasing transverse momentum, whereas the ratio remains constant as a function of pseudorapidity. In addition, the ratio of branching fractions of the decays B 0D K + and B 0D π+ is measured to be 0.0822 ± 0.0011 (stat) ± 0.0025 (syst).

Publisher

Springer Science and Business Media LLC

Subject

Nuclear and High Energy Physics

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