Measurement of b-hadron branching fractions for two-body decays into charmless charged hadrons

Author:

,Aaij R.,Abellan Beteta C.,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.,Anderson J.,Appleby R. B.,Aquines Gutierrez O.,Archilli F.,Artamonov A.,Artuso M.,Aslanides E.,Auriemma G.,Bachmann S.,Back J. J.,Balagura V.,Baldini W.,Barlow R. J.,Barschel C.,Barsuk S.,Barter W.,Bates A.,Bauer C.,Bauer Th.,Bay A.,Bediaga I.,Belogurov S.,Belous K.,Belyaev I.,Ben-Haim E.,Benayoun M.,Bencivenni G.,Benson S.,Benton J.,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.,Bozzi C.,Brambach T.,van den Brand J.,Bressieux J.,Brett D.,Britsch M.,Britton T.,Brook N. H.,Brown H.,de Bruyn K.,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.,Carson L.,Carvalho Akiba K.,Casse G.,Cattaneo M.,Cauet Ch.,Charles M.,Charpentier Ph.,Chiapolini N.,Ciba K.,Cid Vidal X.,Ciezarek G.,Clarke P. E. L.,Clemencic M.,Cliff H. V.,Closier J.,Coca C.,Coco V.,Cogan J.,Collins P.,Comerma-Montells A.,Contu A.,Cook A.,Coombes M.,Corti G.,Couturier B.,Cowan G. A.,Currie R.,D’Ambrosio C.,David P.,David P. N. Y.,De Bonis I.,De Capua S.,De Cian M.,De Miranda J. M.,De Paula L.,De Simone P.,Decamp D.,Deckenhoff M.,Degaudenzi H.,Del Buono L.,Deplano C.,Derkach D.,Deschamps O.,Dettori F.,Dickens J.,Dijkstra H.,Diniz Batista P.,Domingo Bonal F.,Donleavy S.,Dordei F.,Dosil Suárez A.,Dossett D.,Dovbnya A.,Dupertuis F.,Dzhelyadin R.,Dziurda A.,Easo S.,Egede U.,Egorychev V.,Eidelman S.,van Eijk D.,Eisele F.,Eisenhardt S.,Ekelhof R.,Eklund L.,Elsasser Ch.,Elsby D.,Esperante Pereira D.,Falabella A.,Färber C.,Fardell G.,Farinelli C.,Farry S.,Fave V.,Fernandez Albor V.,Ferro-Luzzi M.,Filippov S.,Fitzpatrick C.,Fontana M.,Fontanelli F.,Forty R.,Francisco O.,Frank M.,Frei C.,Frosini M.,Furcas S.,Gallas Torreira A.,Galli D.,Gandelman M.,Gandini P.,Gao Y.,Garnier J-C.,Garofoli J.,Garra Tico J.,Garrido L.,Gascon D.,Gaspar C.,Gauld R.,Gauvin N.,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.,Gui B.,Gushchin E.,Guz Yu.,Gys T.,Hadjivasiliou C.,Haefeli G.,Haen C.,Haines S. C.,Hampson T.,Hansmann-Menzemer S.,Harji R.,Harnew N.,Harrison J.,Harrison P. F.,Hartmann T.,He J.,Heijne V.,Hennessy K.,Henrard P.,Hernando Morata J. A.,van Herwijnen E.,Hicks E.,Holubyev K.,Hopchev P.,Hulsbergen W.,Hunt P.,Huse T.,Huston R. S.,Hutchcroft D.,Hynds D.,Iakovenko V.,Ilten P.,Imong J.,Jacobsson R.,Jaeger A.,Jahjah Hussein M.,Jans E.,Jansen F.,Jaton P.,Jean-Marie B.,Jing F.,John M.,Johnson D.,Jones C. R.,Jost B.,Kaballo M.,Kandybei S.,Karacson M.,Karbach T. M.,Keaveney J.,Kenyon I. R.,Kerzel U.,Ketel T.,Keune A.,Khanji B.,Kim Y. M.,Knecht M.,Koopman R. F.,Koppenburg P.,Korolev M.,Kozlinskiy A.,Kravchuk L.,Kreplin K.,Kreps M.,Krocker G.,Krokovny P.,Kruse F.,Kruzelecki K.,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.,Lesiak T.,Li L.,Li Gioi L.,Lieng M.,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.,Mac Raighne A.,Machefert F.,Machikhiliyan I. V.,Maciuc F.,Maev O.,Magnin J.,Malde S.,Mamunur R. M. D.,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.,Massafferri A.,Mathe Z.,Matteuzzi C.,Matveev M.,Maurice E.,Maynard B.,Mazurov A.,McGregor G.,McNulty R.,Meissner M.,Merk M.,Merkel J.,Miglioranzi S.,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.,Mylroie-Smith J.,Naik P.,Nakada T.,Nandakumar R.,Nasteva I.,Needham M.,Neufeld N.,Nguyen A. D.,Nguyen-Mau C.,Nicol M.,Niess V.,Nikitin N.,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.,Palacios J.,Palano A.,Palutan M.,Panman J.,Papanestis A.,Pappagallo M.,Parkes C.,Parkinson C. J.,Passaleva G.,Patel G. D.,Patel M.,Paterson S. K.,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.,Petrolini A.,Phan A.,Picatoste Olloqui E.,Pie Valls B.,Pietrzyk B.,Pilař T.,Pinci D.,Plackett R.,Playfer S.,Plo Casasus M.,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.,Raven G.,Redford S.,Reid M. M.,dos Reis A. C.,Ricciardi S.,Richards A.,Rinnert K.,Roa Romero D. A.,Robbe P.,Rodrigues E.,Rodrigues F.,Rodriguez Perez P.,Rogers G. J.,Roiser S.,Romanovsky V.,Rosello M.,Rouvinet J.,Ruf T.,Ruiz H.,Sabatino G.,Saborido Silva J. J.,Sagidova N.,Sail P.,Saitta B.,Salzmann C.,Sannino M.,Santacesaria R.,Santamarina Rios C.,Santinelli R.,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.,Sobczak K.,Soler F. J. P.,Solomin A.,Soomro F.,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.,Szczekowski M.,Szczypka P.,Szumlak T.,T’Jampens S.,Teodorescu E.,Teubert F.,Thomas C.,Thomas E.,van Tilburg J.,Tisserand V.,Tobin M.,Topp-Joergensen S.,Torr N.,Tournefier E.,Tourneur S.,Tran M. T.,Tsaregorodtsev A.,Tuning N.,Ubeda Garcia M.,Ukleja A.,Uwer U.,Vagnoni V.,Valenti G.,Vazquez Gomez R.,Vazquez Regueiro P.,Vecchi S.,Velthuis J. J.,Veltri M.,Viaud B.,Videau I.,Vieira D.,Vilasis-Cardona X.,Visniakov J.,Vollhardt A.,Volyanskyy D.,Voong D.,Vorobyev A.,Voss H.,Waldi R.,Wandernoth S.,Wang J.,Ward D. R.,Watson N. K.,Webber A. D.,Websdale D.,Whitehead M.,Wiedner D.,Wiggers L.,Wilkinson G.,Williams M. P.,Williams M.,Wilson F. F.,Wishahi J.,Witek M.,Witzeling W.,Wotton S. A.,Wyllie K.,Xie Y.,Xing F.,Xing Z.,Yang Z.,Young R.,Yushchenko O.,Zangoli M.,Zavertyaev M.,Zhang F.,Zhang L.,Zhang W. C.,Zhang Y.,Zhelezov A.,Zhong L.,Zvyagin A.

Abstract

Abstract Based on data corresponding to an integrated luminosity of 0.37 fb−1 collected by the LHCb experiment in 2011, the following ratios of branching fractions are measured: $ \begin{array}{*{20}{c}} {{{{\mathcal{B}\left( {B^0 \to {\pi^{+}}{\pi^{-}}} \right)}} \left/ {{\mathcal{B}\left( {B^0 \to {K^{+}}{\pi^{-}}} \right)}} \right.}=0.262\pm 0.009\pm 0.017,} \\ {\left( {{f_s \left/ {f_d } \right.}} \right)\cdot {{{\mathcal{B}\left( {B_s^0\to {K^{+}}{K^{-}}} \right)}} \left/ {{\mathcal{B}\left( {B^0 \to {K^{+}}{\pi^{-}}} \right)}} \right.}=0.316\pm 0.009\pm 0.019,} \\ {\left( {{f_s \left/ {f_d } \right.}} \right)\cdot {{{\mathcal{B}\left( {B_s^0\to {\pi^{+}}{K^{-}}} \right)}} \left/ {{\mathcal{B}\left( {B^0 \to {K^{+}}{\pi^{-}}} \right)}} \right.}=0.074\pm 0.006\pm 0.006,} \\ {\left( {{f_d \left/ {f_s } \right.}} \right)\cdot {{{\mathcal{B}\left( {B^0 \to {K^{+}}{K^{-}}} \right)}} \left/ {{\mathcal{B}\left( {B_s^0\to {K^{+}}{K^{-}}} \right)}} \right.}=0.018_{-0.007}^{+0.008}\pm 0.009,} \\ {\left( {{f_s \left/ {f_d } \right.}} \right)\cdot {{{\mathcal{B}\left( {B_s^0\to {\pi^{+}}{\pi^{-}}} \right)}} \left/ {{\mathcal{B}\left( {B^0 \to {\pi^{+}}{\pi^{-}}} \right)}} \right.}=0.050_{-0.009}^{+0.011}\pm 0.004,} \\ {{{{\mathcal{B}\left( {\Lambda_b^0\to p{\pi^{-}}} \right)}} \left/ {{\mathcal{B}\left( {\Lambda_b^0\to p{K^{-}}} \right)}} \right.}=0.86\pm 0.08\pm 0.05,} \\ \end{array} $ where the first uncertainties are statistical and the second systematic. Using the current world average of $ \mathcal{B}\left( {B^0 \to {K^{+}}{\pi^{-}}} \right) $ and the ratio of the strange to light neutral B meson production f s /f d measured by LHCb, we obtain: $ \begin{array}{*{20}{c}} {\mathcal{B}\left( {B^0 \to {\pi^{+}}{\pi^{-}}} \right)=\left( {5.08\pm 0.17\pm 0.37} \right)\times {10^{-6 }},} \\ {\mathcal{B}\left( {B_s^0\to {K^{+}}{K^{-}}} \right)=\left( {23.0\pm 0.7\pm 2.3} \right)\times {10^{-6 }},} \\ {\mathcal{B}\left( {B_s^0\to {\pi^{+}}{K^{-}}} \right)=\left( {5.4\pm 0.4\pm 0.6} \right)\times {10^{-6 }},} \\ {\mathcal{B}\left( {B^0 \to {K^{+}}{K^{-}}} \right)=\left( {0.11_{-0.04}^{+0.05}\pm 0.06} \right)\times {10^{-6 }},} \\ {\mathcal{B}\left( {B_s^0\to {\pi^{+}}{\pi^{-}}} \right)=\left( {0.95_{-0.17}^{+0.21}\pm 0.13} \right)\times {10^{-6 }}.} \\ \end{array} $ The measurements of $ \mathcal{B}\left( {B_s^0\to {K^{+}}{K^{-}}} \right) $ , $ \mathcal{B}\left( {B_s^0\to {\pi^{+}}{K^{-}}} \right) $ and $ \mathcal{B}\left( {B^0 \to {K^{+}}{K^{-}}} \right) $ are the most precise to date. The decay mode $ B_s^0\to {\pi^{+}}{\pi^{-}} $ is observed for the first time with a significance of more than 5σ.

Publisher

Springer Science and Business Media LLC

Subject

Nuclear and High Energy Physics

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