Observation of Lambda b(0) -> D(+)p pi(-)pi(-) and Lambda b(0) -> D-*+p pi(-)pi(-) decays

Lesya Shchutska, Olivier Schneider, Aurelio Bay, Guido Haefeli, Frédéric Blanc, Tatsuya Nakada, Michel De Cian, Elena Graverini, Renato Quagliani, Veronica Sølund Kirsebom, Ettore Zaffaroni, Matthieu Philippe Luther Marinangeli, Donal Patrick Hill, Federico Leo Redi, Maria Vieites Diaz, Vladimir Macko, Guillaume Max Pietrzyk, Sebastian Schulte, Lino Ferreira Lopes, Surapat Ek-In, Carina Trippl, Sara Celani, Serhii Cholak, Ana Bárbara Rodrigues Cavalcante
2022

Résumé

The multihadron decays Lambda(0)(b) -> D(+)p pi(-)pi(-) and Lambda(0 )(b)-> D-*+p pi(-)pi(-) are observed in data corresponding to an integrated luminosity of 3fb(-1), collected in proton-proton collisions at centre-of-mass energies of 7 and 8 TeV by the LHCb detector. Using the decay Lambda(0)(b) -> Lambda(+)(c)pi(+)pi(-)pi(-) as a normalisation channel, the ratio of branching fractions is measured to be

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