Measurement of the branching fraction of the B 0 → D + s π − decay

A branching fraction measurement of the B 0 → D + s π − decay is presented using proton–proton collision data collected with the LHCb experiment, corresponding to an integrated luminosity of 5 . 0 fb − 1 . The branching fraction is found to be B ( B 0 → D + s π − ) = ( 19 . 4 ± 1 . 8 ± 1 . 3 ± 1 . 2 ) × 10 − 6 , where the first uncertainty is statistical, the second systematic and the third is due to the uncertainty on the B 0 → D − π + , D + s → K + K − π + and D − → K + π − π − branching fractions. This is the most precise single measurement of this quantity to date. As this decay proceeds through a single amplitude involving a b → u charged-current transition, the result provides information on non-factorisable strong interaction effects and the magnitude of the Cabibbo–Kobayashi–Maskawa matrix element V ub . Additionally, the collision energy dependence of the hadronisation-fraction ratio f s / f d is measured through B 0 s → D + s π − and B 0 → D − π + decays.

D. Lucchesi | W. Kucewicz | W. Parker | S. Jakobsen | M. Idzik | M. Hushchyn | S. Meloni | P. Krokovny | D. Johnson | A. Petrolini | M. Kenzie | K. Petridis | G. Kunde | A. Maevskiy | A. Lai | P. Perret | A. Lusiani | A. Malinin | G. Passaleva | P. Marshall | Y. Luo | X. Liu | Y. Kang | T. Nanut | S. Neubert | A. Mauri | T. Kirn | D. Müller | M. Milovanović | D. Hynds | J. Mauricio | A. Leflat | C. Jones | A. Mathad | W. Krzemień | P. Ibis | K. Ivshin | R. Jacobsson | E. Jans | F. Jiang | M. John | N. Jurik | M. Karacson | N. Kazeev | F. Keizer | B. Khanji | S. Klaver | S. Koliiev | R. Kopečná | I. Kostiuk | S. Kotriakhova | F. Kress | M. Kucharczyk | D. Lancierini | X. Liang | V. Lisovskyi | G. Lovell | A. Lupato | E. Luppi | O. Lupton | X. Lyu | F. Machefert | V. Macko | P. Mackowiak | D. Maisuzenko | M. Majewski | B. Malecki | T. Maltsev | G. Mancinelli | D. Marangotto | J. Maratas | M. Marinangeli | P. Marino | R. Matev | M. McCann | A. McNab | B. Meadows | C. Méaux | N. Meinert | D. Melnychuk | A. Merli | D. Milanés | E. Millard | L. Minzoni | T. Mombächer | S. Monteil | M. Morandin | D. Murray | M. Materok | A. Konoplyannikov | P. Roloff | P. Owen | A. Pellegrino | S. Popov | M. Needham | R. Gac | D. Popov | S. Perazzini | N. Neri | M. Korolev | C. Benito | D. Santos | G. Lafferty | A. Pearce | A. Oyanguren | G. Liu | J. Goicochea | M. Mukherjee | M. Martinelli | S. Nieswand | A. Ossowska | T. Pajero | G. Panshin | D. Pereima | M. Petruzzo | G. Pietrzyk | A. Rollings | A. Inglessi | B. Jashal | G. Loustau | H. Malygina | K. Mattioli | T. Ovsiannikova | J. Qin | K. Müller | S. Luchuk | I. Neri | M. Jeżabek | M. Mulder | P. Kopciewicz | A. Kharisova | S. Kretzschmar | V. Matiunin | A. Mödden | P. Naik | Vukan Jevtic | A. Kondybayeva | O. Kot | H. Kuindersma | F. Lazzari | J. L. Castro | Y. Lu | S. Maccolini | R. M. Escalero | D. Manuzzi | S. Mariani | L. Martinazzoli | L. Mcconnell | G. Meier | M. Mikhasenko | B. Mitreska | P. Muzzetto | C. Nunez | D. Ilin | A. Ishteev | P. Kravchenko | A. Lampis | J. Langer | O. Lantwin | S. Legotin | R. Litvinov | S. Liu | V. Lukashenko | O. Madejczyk | M. Mazurek | L. M. Garcia | H. Sazak | F. Vidal | A. Jawahery | M. Kreps | S. Malde | G. Manca | B. Jost | S. Kandybei | T. Ketel | P. Koppenburg | L. Kravchuk | V. Kudryavtsev | C. Langenbruch | R. Lefèvre | O. Leroy | T. Lesiak | B. Leverington | I. Longstaff | J. Lopes | F. Maciuc | O. Maev | U. Marconi | G. Martellotti | A. Massafferri | Z. Máthé | C. Matteuzzi | E. Maurice | F. Muheim | T. Nakada | R. Nandakumar | I. Nasteva | N. Nikitin | A. Palano | M. Palutan | T. Latham | D. Hutchcroft | G. Lanfranchi | T. Kvaratskheliya | M. L. Martinez | D. Lacarrere | C. Prouve | P. Ilten

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